## ASxxxx Cross Assembler Documentation

                                    ASxxxx Assemblers

                                           and

                                ASLINK Relocating Linker

                                     Version   5.00
                                       April 2009

            CHAPTER 1  THE ASSEMBLER                                     1-1
              1.1     THE ASXXXX ASSEMBLERS                              1-1
              1.1.1     Assembly Pass 1                                  1-2
              1.1.2     Assembly Pass 2                                  1-2
              1.1.3     Assembly Pass 3                                  1-2
              1.2     SOURCE PROGRAM FORMAT                              1-3
              1.2.1     Statement Format                                 1-3
              1.2.1.1     Label Field                                    1-3
              1.2.1.2     Operator Field                                 1-5
              1.2.1.3     Operand Field                                  1-5
              1.2.1.4     Comment Field                                  1-6
              1.3     SYMBOLS AND EXPRESSIONS                            1-6
              1.3.1     Character Set                                    1-6
              1.3.2     User-Defined Symbols                            1-10
              1.3.3     Reusable Symbols                                1-10
              1.3.4     Current Location Counter                        1-12
              1.3.5     Numbers                                         1-13
              1.3.6     Terms                                           1-14
              1.3.7     Expressions                                     1-14
              1.4     GENERAL ASSEMBLER DIRECTIVES                      1-16
              1.4.1     .module Directive                               1-16
              1.4.2     .title Directive                                1-16
              1.4.3     .sbttl Directive                                1-17
              1.4.4     .list and .nlist Directives                     1-17
              1.4.5     .page Directive                                 1-18
              1.4.6     .msg Directive                                  1-19
              1.4.7     .error Directive                                1-20
              1.4.8     .byte, .db, and .fcb Directives                 1-20
              1.4.9     .word, .dw, and .fdb Directives                 1-21
              1.4.10    .3byte and .triple Directives                   1-21
              1.4.11    .4byte and .quad Directive                      1-22
              1.4.12    .blkb, .ds, .rmb, and .rs Directives            1-22
              1.4.13    .blkw, .blk3, and .blk4 Directives              1-22
              1.4.14    .ascii, .str, and .fcc Directives               1-23
              1.4.15    .ascis and .strs Directives                     1-23
              1.4.16    .asciz and .strz Directives                     1-24
              1.4.17    .assume Directive                               1-24
              1.4.18    .radix Directive                                1-25
              1.4.19    .even Directive                                 1-25
              1.4.20    .odd Directive                                  1-25
              1.4.21    .bndry Directive                                1-26
              1.4.22    .area Directive                                 1-27
              1.4.23    .bank Directive                                 1-29
              1.4.24    .org Directive                                  1-30
              1.4.25    .globl Directive                                1-31
              1.4.26    .local Directive                                1-31
              1.4.27    .equ, .gblequ, and .lclequ Directives           1-32
              1.4.28    .if, .else, and .endif Directives               1-33
              1.4.29    .iff, .ift, and .iftf Directives                1-34
              1.4.30    .ifxx Directives                                1-35
              1.4.31    .ifdef Directive                                1-36
              1.4.32    .ifndef Directive                               1-37
              1.4.33    .ifb Directive                                  1-38
              1.4.34    .ifnb Directive                                 1-39
              1.4.35    .ifidn Directive                                1-40
              1.4.36    .ifdif Directive                                1-41

                                                                     Page ii

              1.4.37    Alternate .if Directive Forms                   1-42
              1.4.38    Immediate Conditional Assembly Directives       1-43
              1.4.39    .include Directive                              1-44
              1.4.40    .define and .undefine Directives                1-45
              1.4.41    .setdp Directive                                1-46
              1.4.42    .16bit, .24bit, and .32bit Directives           1-48
              1.4.43    .msb Directive                                  1-48
              1.4.44    .lohi and .hilo Directives                      1-49
              1.4.45    .end Directive                                  1-49
              1.5     INVOKING ASXXXX                                   1-50
              1.6     ERRORS                                            1-52
              1.7     LISTING FILE                                      1-54
              1.8     SYMBOL TABLE FILE                                 1-56
              1.9     OBJECT FILE                                       1-57

            CHAPTER 2  THE MACRO PROCESSOR                               2-1
              2.1     DEFINING MACROS                                    2-1
              2.1.1     .macro Directive                                 2-2
              2.1.2     .endm Directive                                  2-3
              2.1.3     .mexit Directive                                 2-3
              2.2     CALLING MACROS                                     2-4
              2.3     ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS     2-5
              2.3.1     Macro Nesting                                    2-6
              2.3.2     Special Characters in Macro Arguments            2-7
              2.3.3     Passing Numerical Arguments as Symbols           2-7
              2.3.4     Number of Arguments in Macro Calls               2-9
              2.3.5     Creating Local Symbols Automatically             2-9
              2.3.6     Concatenation of Macro Arguments                2-10
              2.4     MACRO ATTRIBUTE DIRECTIVES                        2-11
              2.4.1     .narg Directive                                 2-12
              2.4.2     .nchr Directive                                 2-13
              2.4.3     .ntyp Directive                                 2-14
              2.4.4     .nval Directive                                 2-14
              2.5     INDEFINITE REPEAT BLOCK DIRECTIVES                2-15
              2.5.1     .irp Directive                                  2-16
              2.5.2     .irpc Directive                                 2-17
              2.6     REPEAT BLOCK DIRECTIVE                            2-18
              2.6.1     .rept                                           2-18
              2.7     MACRO DELETION DIRECTIVE                          2-19
              2.7.1     .mdelete                                        2-19
              2.8     MACRO INVOCATION DETAILS                          2-19
              2.9     BUILDING A MACRO LIBRARY                          2-20
              2.9.1     .mlib Macro Directive                           2-21
              2.9.2     .mcall Macro Directive                          2-22
              2.10    EXAMPLE MACRO CROSS ASSEMBLERS                    2-24

            CHAPTER 3  THE LINKER                                        3-1
              3.1     ASLINK RELOCATING LINKER                           3-1
              3.2     INVOKING ASLINK                                    3-2
              3.3     LIBRARY PATH(S) AND FILE(S)                        3-5
              3.4     ASLINK PROCESSING                                  3-6
              3.5     ASXXXX VERSION 5.XX (4.XX) LINKING                 3-8

                                                                    Page iii

              3.5.1     Object Module Format                             3-8
              3.5.2     Header Line                                      3-9
              3.5.3     Module Line                                      3-9
              3.5.4     Merge Mode Line                                  3-9
              3.5.5     Bank Line                                       3-10
              3.5.6     Area Line                                       3-10
              3.5.7     Symbol Line                                     3-10
              3.5.8     T Line                                          3-11
              3.5.9     R Line                                          3-11
              3.5.10    P Line                                          3-12
              3.5.11    24-Bit and 32-Bit Addressing                    3-12
              3.5.12    ASlink V5.xx (V4.xx) Error Messages             3-13
              3.6     ASXXXX VERSION 3.XX LINKING                       3-15
              3.6.1     Object Module Format                            3-15
              3.6.2     Header Line                                     3-15
              3.6.3     Module Line                                     3-16
              3.6.4     Area Line                                       3-16
              3.6.5     Symbol Line                                     3-16
              3.6.6     T Line                                          3-16
              3.6.7     R Line                                          3-17
              3.6.8     P Line                                          3-17
              3.6.9     24-Bit and 32-Bit Addressing                    3-18
              3.6.10    ASlink V3.xx Error Messages                     3-18
              3.7     INTEL IHX OUTPUT FORMAT (16-BIT)                  3-21
              3.8     INTEL I86 OUTPUT FORMAT (24 OR 32-BIT)            3-22
              3.9     MOTORLA S1-S9 OUTPUT FORMAT (16-BIT)              3-23
              3.10    MOTORLA S2-S8 OUTPUT FORMAT (24-BIT)              3-24
              3.11    MOTORLA S3-S7 OUTPUT FORMAT (32-BIT)              3-25
              3.12    TANDY COLOR COMPUTER DISK BASIC FORMAT            3-26

            CHAPTER 4  BUILDING ASXXXX AND ASLINK                        4-1
              4.1     BUILDING ASXXXX AND ASLINK WITH LINUX              4-2
              4.2     BUILDING ASXXXX AND ASLINK UNDER CYGWIN            4-2
              4.3     BUILDING ASXXXX AND ASLINK WITH DJGPP              4-3
              4.4     BUILDING ASXXXX AND ASLINK WITH BORLAND'S
                      TURBO C++ 3.0                                      4-3
              4.4.1     Graphical User Interface                         4-3
              4.4.2     Command Line Interface                           4-4
              4.5     BUILDING ASXXXX AND ASLINK WITH
                      MS VISUAL C++ 6.0                                  4-5
              4.5.1     Graphical User Interface                         4-5
              4.5.2     Command Line Interface                           4-5
              4.6     BUILDING ASXXXX AND ASLINK WITH
                      MS VISUAL STUDIO 2005                              4-6
              4.6.1     Graphical User Interface                         4-6
              4.6.2     Command Line Interface                           4-6
              4.7     BUILDING ASXXXX AND ASLINK WITH
                      OPEN WATCOM V1.7                                   4-7
              4.7.1     Graphical User Interface                         4-7
              4.7.2     Command Line Interface                           4-7
              4.8     BUILDING ASXXXX AND ASLINK WITH
                      SYMANTEC C/C++ V7.2                                4-8

                                                                     Page iv

              4.8.1     Graphical User Interface                         4-8
              4.8.2     Command Line Interface                           4-8

            APPENDIX A  ASXSCN LISTING FILE SCANNER                      A-1

            APPENDIX B  ASXCNV LISTING CONVERTER                         B-1

            APPENDIX C  S19OS9 CONVERSION UTILITY                        C-1
              C.1     BACKGROUND                                         C-1
              C.2     CREATING AN OS9 MODULE                             C-2
              C.2.1     Step 1:  Define Header Values                    C-3
              C.2.2     Step 2:  Create The Module Header                C-3
              C.2.3     Step 3:  Allocate Storage                        C-5
              C.2.4     Step 4:  Insert The Program Code                 C-5
              C.2.5     Step 5:  End Assembly By Inserting CRC           C-6
              C.3     THE CONVERSION UTILITY:  S19OS9                    C-7

            APPENDIX D  CHANGE LOG                                       D-1

            APPENDIX AA  ASCHECK ASSEMBLER                              AA-1
              AA.1    .opcode DIRECTIVE                                 AA-1

            APPENDIX AB  AS1802 ASSEMBLER                               AB-1
              AB.1    ACKNOWLEDGMENT                                    AB-1
              AB.2    1802 REGISTER SET                                 AB-1
              AB.3    1802 INSTRUCTION SET                              AB-1
              AB.3.1    1802 Inherent Instructions                      AB-2
              AB.3.2    1802 Short Branch Instructions                  AB-2
              AB.3.3    1802 Long Branch Instructions                   AB-3
              AB.3.4    1802 Immediate Instructions                     AB-3
              AB.3.5    1802 Register Instructions                      AB-3
              AB.3.6    1802 Input and Output Instructions              AB-3
              AB.3.7    CDP1802 COSMAC Microprocessor Instruction
                        Set Summary                                     AB-4

            APPENDIX AC  AS2650 ASSEMBLER                               AC-1
              AC.1    2650 REGISTER SET                                 AC-1
              AC.2    2650 INSTRUCTION SET                              AC-1
              AC.2.1    Load / Store Instructions                       AC-2
              AC.2.2    Arithmetic / Compare Instructions               AC-2
              AC.2.3    Logical / Rotate Instructions                   AC-2
              AC.2.4    Condition Code Branches                         AC-3
              AC.2.5    Register Test Branches                          AC-3
              AC.2.6    Branches (to Subroutines) / Returns             AC-3
              AC.2.7    Input / Output                                  AC-3
              AC.2.8    Miscellaneos                                    AC-3
              AC.2.9    Program Status                                  AC-4

            APPENDIX AD  AS430 ASSEMBLER                                AD-1
              AD.1    MPS430 REGISTER SET                               AD-1
              AD.2    MPS430 ADDRESSING MODES                           AD-2
              AD.2.1    MPS430 Instruction Mnemonics                    AD-3

                                                                      Page v

            APPENDIX AE  AS61860 ASSEMBLER                              AE-1
              AE.1    ACKNOWLEDGMENT                                    AE-1
              AE.2    61860 REGISTER SET                                AE-1
              AE.3    PROCESSOR SPECIFIC DIRECTIVES                     AE-2
              AE.4    61860 INSTRUCTION SET                             AE-2
              AE.4.1    Load Immediate Register                         AE-3
              AE.4.2    Load Accumulator                                AE-3
              AE.4.3    Store Accumulator                               AE-3
              AE.4.4    Move Data                                       AE-3
              AE.4.5    Exchange Data                                   AE-4
              AE.4.6    Stack Operations                                AE-4
              AE.4.7    Block Move Data                                 AE-4
              AE.4.8    Block Exchange Data                             AE-4
              AE.4.9    Increment and Decrement                         AE-5
              AE.4.10   Increment/Decrement with Load/Store             AE-5
              AE.4.11   Fill                                            AE-5
              AE.4.12   Addition and Subtraction                        AE-6
              AE.4.13   Shift Operations                                AE-6
              AE.4.14   Boolean Operations                              AE-6
              AE.4.15   Compare                                         AE-7
              AE.4.16   CPU Control                                     AE-7
              AE.4.17   Absolute Jumps                                  AE-7
              AE.4.18   Relative Jumps                                  AE-8
              AE.4.19   Calls                                           AE-8
              AE.4.20   Input and output                                AE-8
              AE.4.21   Unknown Commands                                AE-9

            APPENDIX AF  AS6500 ASSEMBLER                               AF-1
              AF.1    ACKNOWLEDGMENT                                    AF-1
              AF.2    6500 REGISTER SET                                 AF-2
              AF.3    6500 INSTRUCTION SET                              AF-2
              AF.3.1    Processor Specific Directives                   AF-3
              AF.3.2    65xx Core Inherent Instructions                 AF-3
              AF.3.3    65xx Core Branch Instructions                   AF-3
              AF.3.4    65xx Core Single Operand Instructions           AF-3
              AF.3.5    65xx Core Double Operand Instructions           AF-4
              AF.3.6    65xx Core Jump and Jump to Subroutine
                        Instructions                                    AF-4
              AF.3.7    65xx Core Miscellaneous X and Y Register
                        Instructions                                    AF-4
              AF.3.8    65F11 and 65F12 Specific Instructions           AF-5
              AF.3.9    65C00/21 and 65C29 Specific Instructions        AF-5
              AF.3.10   65C02, 65C102, and 65C112 Specific
                        Instructions                                    AF-6

            APPENDIX AG  AS6800 ASSEMBLER                               AG-1
              AG.1    6800 REGISTER SET                                 AG-1
              AG.2    6800 INSTRUCTION SET                              AG-1
              AG.2.1    Inherent Instructions                           AG-2
              AG.2.2    Branch Instructions                             AG-2
              AG.2.3    Single Operand Instructions                     AG-3
              AG.2.4    Double Operand Instructions                     AG-4

                                                                     Page vi

              AG.2.5    Jump and Jump to Subroutine Instructions        AG-4
              AG.2.6    Long Register Instructions                      AG-5

            APPENDIX AH  AS6801 ASSEMBLER                               AH-1
              AH.1    .hd6303 DIRECTIVE                                 AH-1
              AH.2    6801 REGISTER SET                                 AH-1
              AH.3    6801 INSTRUCTION SET                              AH-1
              AH.3.1    Inherent Instructions                           AH-2
              AH.3.2    Branch Instructions                             AH-2
              AH.3.3    Single Operand Instructions                     AH-3
              AH.3.4    Double Operand Instructions                     AH-4
              AH.3.5    Jump and Jump to Subroutine Instructions        AH-5
              AH.3.6    Long Register Instructions                      AH-5
              AH.3.7    6303 Specific Instructions                      AH-5

            APPENDIX AI  AS6804 ASSEMBLER                               AI-1
              AI.1    6804 REGISTER SET                                 AI-1
              AI.2    6804 INSTRUCTION SET                              AI-1
              AI.2.1    Inherent Instructions                           AI-2
              AI.2.2    Branch Instructions                             AI-2
              AI.2.3    Single Operand Instructions                     AI-2
              AI.2.4    Jump and Jump to Subroutine Instructions        AI-2
              AI.2.5    Bit Test Instructions                           AI-2
              AI.2.6    Load Immediate data Instruction                 AI-3
              AI.2.7    6804 Derived Instructions                       AI-3

            APPENDIX AJ  AS68(HC)05 ASSEMBLER                           AJ-1
              AJ.1    .6805 DIRECTIVE                                   AJ-1
              AJ.2    .hc05 DIRECTIVE                                   AJ-1
              AJ.3    THE .__.CPU.  VARIABLE                            AJ-1
              AJ.4    6805 REGISTER SET                                 AJ-2
              AJ.5    6805 INSTRUCTION SET                              AJ-2
              AJ.5.1    Control Instructions                            AJ-3
              AJ.5.2    Bit Manipulation Instructions                   AJ-3
              AJ.5.3    Branch Instructions                             AJ-3
              AJ.5.4    Read-Modify-Write Instructions                  AJ-4
              AJ.5.5    Register\Memory Instructions                    AJ-4
              AJ.5.6    Jump and Jump to Subroutine Instructions        AJ-5

            APPENDIX AK  AS68(HC[S])08 ASSEMBLER                        AK-1
              AK.1    PROCESSOR SPECIFIC DIRECTIVES                     AK-1
              AK.1.1    .hc08 Directive                                 AK-1
              AK.1.2    .hcs08 Directive                                AK-1
              AK.1.3    .6805 Directive                                 AK-2
              AK.1.4    .hc05 Directive                                 AK-2
              AK.1.5    The .__.CPU.  Variable                          AK-2
              AK.2    68HC(S)08 REGISTER SET                            AK-3
              AK.3    68HC(S)08 INSTRUCTION SET                         AK-3
              AK.3.1    Control Instructions                            AK-4
              AK.3.2    Bit Manipulation Instructions                   AK-4
              AK.3.3    Branch Instructions                             AK-4
              AK.3.4    Complex Branch Instructions                     AK-5

                                                                    Page vii

              AK.3.5    Read-Modify-Write Instructions                  AK-5
              AK.3.6    Register\Memory Instructions                    AK-6
              AK.3.7    Double Operand Move Instruction                 AK-6
              AK.3.8    16-Bit <H:X> Index Register Instructions        AK-6
              AK.3.9    Jump and Jump to Subroutine Instructions        AK-6

            APPENDIX AL  AS6809 ASSEMBLER                               AL-1
              AL.1    6809 REGISTER SET                                 AL-1
              AL.2    6809 INSTRUCTION SET                              AL-1
              AL.2.1    Inherent Instructions                           AL-3
              AL.2.2    Short Branch Instructions                       AL-3
              AL.2.3    Long Branch Instructions                        AL-3
              AL.2.4    Single Operand Instructions                     AL-4
              AL.2.5    Double Operand Instructions                     AL-5
              AL.2.6    D-register Instructions                         AL-5
              AL.2.7    Index/Stack Register Instructions               AL-5
              AL.2.8    Jump and Jump to Subroutine Instructions        AL-6
              AL.2.9    Register - Register Instructions                AL-6
              AL.2.10   Condition Code Register Instructions            AL-6
              AL.2.11   6800 Compatibility Instructions                 AL-6

            APPENDIX AM  AS6811 ASSEMBLER                               AM-1
              AM.1    68HC11 REGISTER SET                               AM-1
              AM.2    68HC11 INSTRUCTION SET                            AM-1
              AM.2.1    Inherent Instructions                           AM-2
              AM.2.2    Branch Instructions                             AM-2
              AM.2.3    Single Operand Instructions                     AM-3
              AM.2.4    Double Operand Instructions                     AM-4
              AM.2.5    Bit Manupulation Instructions                   AM-4
              AM.2.6    Jump and Jump to Subroutine Instructions        AM-5
              AM.2.7    Long Register Instructions                      AM-5

            APPENDIX AN  AS68(HC[S])12 ASSEMBLER                        AN-1
              AN.1    PROCESSOR SPECIFIC DIRECTIVES                     AN-1
              AN.1.1    .hc12 Directive                                 AN-1
              AN.1.2    .hcs12 Directive                                AN-1
              AN.1.3    The .__.CPU.  Variable                          AN-2
              AN.2    68HC(S)12 REGISTER SET                            AN-2
              AN.3    68HC(S)12 INSTRUCTION SET                         AN-3
              AN.3.1    Inherent Instructions                           AN-4
              AN.3.2    Short Branch Instructions                       AN-4
              AN.3.3    Long Branch Instructions                        AN-5
              AN.3.4    Branch on Decrement, Test, or Increment         AN-5
              AN.3.5    Bit Clear and Set Instructions                  AN-5
              AN.3.6    Branch on Bit Clear or Set                      AN-5
              AN.3.7    Single Operand Instructions                     AN-6
              AN.3.8    Double Operand Instructions                     AN-7
              AN.3.9    Move Instructions                               AN-7
              AN.3.10   D-register Instructions                         AN-7
              AN.3.11   Index/Stack Register Instructions               AN-8
              AN.3.12   Jump and Jump/Call to Subroutine
                        Instructions                                    AN-8

                                                                   Page viii

              AN.3.13   Other Special Instructions                      AN-8
              AN.3.14   Register - Register Instructions                AN-8
              AN.3.15   Condition Code Register Instructions            AN-8
              AN.3.16   M68HC11 Compatibility Mode Instructions         AN-9

            APPENDIX AO  AS6816 ASSEMBLER                               AO-1
              AO.1    68HC16 REGISTER SET                               AO-1
              AO.2    68HC16 INSTRUCTION SET                            AO-1
              AO.2.1    Inherent Instructions                           AO-2
              AO.2.2    Push/Pull Multiple Register Instructions        AO-3
              AO.2.3    Short Branch Instructions                       AO-3
              AO.2.4    Long Branch Instructions                        AO-3
              AO.2.5    Bit Manipulation Instructions                   AO-3
              AO.2.6    Single Operand Instructions                     AO-4
              AO.2.7    Double Operand Instructions                     AO-5
              AO.2.8    Index/Stack Register Instructions               AO-5
              AO.2.9    Jump and Jump to Subroutine Instructions        AO-6
              AO.2.10   Condition Code Register Instructions            AO-6
              AO.2.11   Multiply and Accumulate Instructions            AO-6

            APPENDIX AP  AS740 ASSEMBLER                                AP-1
              AP.1    ACKNOWLEDGMENT                                    AP-1
              AP.2    740 REGISTER SET                                  AP-1
              AP.3    740 INSTRUCTION SET                               AP-1
              AP.3.1    Inherent Instructions                           AP-3
              AP.3.2    Branch Instructions                             AP-3
              AP.3.3    Single Operand Instructions                     AP-3
              AP.3.4    Double Operand Instructions                     AP-4
              AP.3.5    Jump and Jump to Subroutine Instructions        AP-4
              AP.3.6    Miscellaneous X and Y Register Instructions     AP-4
              AP.3.7    Bit Instructions                                AP-4
              AP.3.8    Other Instructions                              AP-4

            APPENDIX AQ  AS8048 ASSEMBLER                               AQ-1
              AQ.1    .8048 DIRECTIVE                                   AQ-1
              AQ.2    .8041 DIRECTIVE                                   AQ-1
              AQ.3    .8022 DIRECTIVE                                   AQ-2
              AQ.4    .8021 DIRECTIVE                                   AQ-2
              AQ.5    THE .__.CPU.  VARIABLE                            AQ-2
              AQ.6    8048 REGISTER SET                                 AQ-3
              AQ.7    8048 INSTRUCTION SET                              AQ-3
              AQ.7.1    Alphabetical Instruction Listing                AQ-5

            APPENDIX AR  AS8051 ASSEMBLER                               AR-1
              AR.1    ACKNOWLEDGMENT                                    AR-1
              AR.2    8051 REGISTER SET                                 AR-1
              AR.3    8051 INSTRUCTION SET                              AR-2
              AR.3.1    Inherent Instructions                           AR-2
              AR.3.2    Move Instructions                               AR-3
              AR.3.3    Single Operand Instructions                     AR-3
              AR.3.4    Two Operand Instructions                        AR-4
              AR.3.5    Call and Return Instructions                    AR-4

                                                                     Page ix

              AR.3.6    Jump Instructions                               AR-4
              AR.3.7    Predefined Symbols:  SFR Map                    AR-5
              AR.3.8    Predefined Symbols:  SFR Bit Addresses          AR-6
              AR.3.9    Predefined Symbols:  Control Bits               AR-7

            APPENDIX AS  AS8085 ASSEMBLER                               AS-1
              AS.1    8085 REGISTER SET                                 AS-1
              AS.2    8085 INSTRUCTION SET                              AS-1
              AS.2.1    Inherent Instructions                           AS-2
              AS.2.2    Register/Memory/Immediate Instructions          AS-2
              AS.2.3    Call and Return Instructions                    AS-2
              AS.2.4    Jump Instructions                               AS-2
              AS.2.5    Input/Output/Reset Instructions                 AS-3
              AS.2.6    Move Instructions                               AS-3
              AS.2.7    Other Instructions                              AS-3
              AS.2.8    Unspecified Instructions                        AS-3
              AS.3    UNSPECIFIED OPCODE ARTICLE                        AS-4

            APPENDIX AT  AS8XCXXX ASSEMBLER                             AT-1
              AT.1    ACKNOWLEDGMENTS                                   AT-1
              AT.2    AS8XCXXX ASSEMBLER DIRECTIVES                     AT-1
              AT.2.1    Processor Selection Directives                  AT-1
              AT.2.2    .cpu Directive                                  AT-2
              AT.2.3    Processor Addressing Range Directives           AT-3
              AT.2.4    The .__.CPU.  Variable                          AT-3
              AT.2.5    DS80C390 Addressing Mode Directive              AT-4
              AT.2.6    The .msb Directive                              AT-4
              AT.3    DS8XCXXX REGISTER SET                             AT-6
              AT.4    DS8XCXXX INSTRUCTION SET                          AT-6
              AT.4.1    Inherent Instructions                           AT-7
              AT.4.2    Move Instructions                               AT-7
              AT.4.3    Single Operand Instructions                     AT-7
              AT.4.4    Two Operand Instructions                        AT-8
              AT.4.5    Call and Return Instructions                    AT-8
              AT.4.6    Jump Instructions                               AT-8
              AT.5    DS8XCXXX SPECIAL FUNCTION REGISTERS               AT-9
              AT.5.1    SFR Map                                         AT-9
              AT.5.2    Bit Addressable Registers:  Generic            AT-10
              AT.5.3    Bit Addressable Registers:  Specific           AT-11
              AT.5.4    Optional Symbols:  Control Bits                AT-12
              AT.6    DS80C310 SPECIAL FUNCTION REGISTERS              AT-13
              AT.6.1    SFR Map                                        AT-13
              AT.6.2    Bit Addressable Registers:  Generic            AT-14
              AT.6.3    Bit Addressable Registers:  Specific           AT-15
              AT.6.4    Optional Symbols:  Control Bits                AT-16
              AT.7    DS80C320/DS80C323 SPECIAL FUNCTION REGISTERS     AT-17
              AT.7.1    SFR Map                                        AT-17
              AT.7.2    Bit Addressable Registers:  Generic            AT-18
              AT.7.3    Bit Addressable Registers:  Specific           AT-19
              AT.7.4    Optional Symbols:  Control Bits                AT-20
              AT.8    DS80C390 SPECIAL FUNCTION REGISTERS              AT-21
              AT.8.1    SFR Map                                        AT-21

                                                                      Page x

              AT.8.2    Bit Addressable Registers:  Generic            AT-22
              AT.8.3    Bit Addressable Registers:  Specific           AT-23
              AT.8.4    Optional Symbols:  Control Bits                AT-24
              AT.9    DS83C520/DS87C520 SPECIAL FUNCTION REGISTERS     AT-26
              AT.9.1    SFR Map                                        AT-26
              AT.9.2    Bit Addressable Registers:  Generic            AT-27
              AT.9.3    Bit Addressable Registers:  Specific           AT-28
              AT.9.4    Optional Symbols:  Control Bits                AT-29
              AT.10   DS83C530/DS87C530 SPECIAL FUNCTION REGISTERS     AT-30
              AT.10.1   SFR Map                                        AT-30
              AT.10.2   Bit Addressable Registers:  Generic            AT-31
              AT.10.3   Bit Addressable Registers:  Specific           AT-32
              AT.10.4   Optional Symbols:  Control Bits                AT-33
              AT.11   DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS     AT-34
              AT.11.1   SFR Map                                        AT-34
              AT.11.2   Bit Addressable Registers:  Generic            AT-36
              AT.11.3   Bit Addressable Registers:  Specific           AT-37
              AT.11.4   Optional Symbols:  Control Bits                AT-39

            APPENDIX AU  ASAVR ASSEMBLER                                AU-1
              AU.1    AVR ASSEMBLER NOTES                               AU-1
              AU.1.1    Processor Specific Directives                   AU-1
              AU.1.2    The .__.CPU.  Variable                          AU-2
              AU.2    AVR REGISTER SET                                  AU-3
              AU.3    AVR INSTRUCTION SET                               AU-3
              AU.3.1    AVR Arithmetic and Logical Instructions         AU-5
              AU.3.2    AVR Bit and Bit-Test Instructions               AU-6
              AU.3.3    AVR Skip on Test Instructions                   AU-6
              AU.3.4    AVR Jump/Call/Return Instructions               AU-6
              AU.3.5    AVR Short Branch Instructions                   AU-6
              AU.3.6    AVR Short Branch Instructions with Bit Test     AU-7
              AU.3.7    AVR Data Transfer Instructions                  AU-7

            APPENDIX AV  ASEZ80 ASSEMBLER                               AV-1
              AV.1    ACKNOWLEDGMENT                                    AV-1
              AV.2    PROCESSOR SPECIFIC DIRECTIVES                     AV-1
              AV.2.1    .z80 Directive                                  AV-1
              AV.2.2    .adl Directive                                  AV-2
              AV.2.3    .msb Directive                                  AV-2
              AV.3    EZ80 ADDRESSING AND INSTRUCTIONS                  AV-3
              AV.3.1    Instruction Symbols                             AV-3
              AV.3.2    EZ80 Instructions                               AV-5
              AV.3.3    Arithmetic Instructions                         AV-7
              AV.3.4    Bit Manipulation Instructions                   AV-8
              AV.3.5    Block Transfer and Compare Instructions         AV-8
              AV.3.6    Exchange Instructions                           AV-8
              AV.3.7    Input/Output Instructions                       AV-8
              AV.3.8    Load Instructions                               AV-9
              AV.3.9    Logical Instructions                            AV-9
              AV.3.10   Processor Control Instructions                  AV-9
              AV.3.11   Program Flow Instructions                       AV-9
              AV.3.12   Shift and Rotate Instructions                   AV-9

                                                                     Page xi

            APPENDIX AW  ASF2MC8 ASSEMBLER                              AW-1
              AW.1    PROCESSOR SPECIFIC DIRECTIVES                     AW-1
              AW.1.1    .8L Directive                                   AW-1
              AW.1.2    .8FX Directive                                  AW-1
              AW.1.3    The .__.CPU.  Variable                          AW-2
              AW.2    F2MC8L/F2MC8FX REGISTERS                          AW-2
              AW.3    F2MC8L/F2MC8FX INSTRUCTION SET                    AW-3
              AW.3.1    Transfer Instructions                           AW-4
              AW.3.2    Operation Instructions                          AW-4
              AW.3.3    Branch/Jump/Call Instructions                   AW-4
              AW.3.4    Other Instructions                              AW-4

            APPENDIX AX  ASGB ASSEMBLER                                 AX-1
              AX.1    ACKNOWLEDGEMENT                                   AX-1
              AX.2    INTRODUCTION                                      AX-1
              AX.3    GAMEBOY REGISTER SET AND CONDITIONS               AX-1
              AX.4    GAMEBOY INSTRUCTION SET                           AX-2
              AX.4.1    .tile Directive                                 AX-2
              AX.4.2    Potentially Controversial Mnemonic Selection    AX-4
              AX.4.2.1    Auto-Indexing Loads                           AX-4
              AX.4.2.2    Input and Output Operations                   AX-4
              AX.4.2.3    The 'stop' Instruction                        AX-5
              AX.4.3    Inherent Instructions                           AX-5
              AX.4.4    Implicit Operand Instructions                   AX-5
              AX.4.5    Load Instructions                               AX-6
              AX.4.6    Call/Return Instructions                        AX-6
              AX.4.7    Jump Instructions                               AX-6
              AX.4.8    Bit Manipulation Instructions                   AX-6
              AX.4.9    Input and Output Instructions                   AX-7
              AX.4.10   Register Pair Instructions                      AX-7

            APPENDIX AY  ASH8 ASSEMBLER                                 AY-1
              AY.1    H8/3XX REGISTER SET                               AY-1
              AY.2    H8/3XX INSTRUCTION SET                            AY-1
              AY.2.1    Inherent Instructions                           AY-2
              AY.2.2    Branch Instructions                             AY-2
              AY.2.3    Single Operand Instructions                     AY-3
              AY.2.4    Double Operand Instructions                     AY-4
              AY.2.5    Mov Instructions                                AY-5
              AY.2.6    Bit Manipulation Instructions                   AY-6
              AY.2.7    Extended Bit Manipulation Instructions          AY-7
              AY.2.8    Condition Code Instructions                     AY-7
              AY.2.9    Other Instructions                              AY-8
              AY.2.10   Jump and Jump to Subroutine Instructions        AY-8

            APPENDIX AZ  ASM8C ASSEMBLER                                AZ-1
              AZ.1    M8C REGISTER SET                                  AZ-1
              AZ.2    M8C ADDRESSING MODES                              AZ-1
              AZ.3    M8C INSTRUCTION SET                               AZ-2
              AZ.3.1    Double Operand Arithmetic Instructions          AZ-2
              AZ.3.2    Double Operand Logic Instructions               AZ-3
              AZ.3.3    Miscellaneous Double Operand Instructions       AZ-3

                                                                    Page xii

              AZ.3.4    Single Operand Shift/Rotate Instructions        AZ-3
              AZ.3.5    Miscellaneous Single Operand Instructions       AZ-4
              AZ.3.6    Move Instructions                               AZ-4
              AZ.3.7    Inherent Instructions                           AZ-5
              AZ.3.8    Branching Instructions                          AZ-5
              AZ.3.9    Relative Table Read Instruction                 AZ-5

            APPENDIX BA  ASPIC ASSEMBLER                                BA-1
              BA.1    PIC ASSEMBLER NOTES                               BA-1
              BA.2    PROCESSOR SPECIFIC DIRECTIVES                     BA-1
              BA.2.1    .pic Directive                                  BA-2
              BA.2.2    .picnopic Directive                             BA-3
              BA.2.3    .pic12bit Directive                             BA-3
              BA.2.4    .pic14bit Directive                             BA-3
              BA.2.5    .pic16bit Directive                             BA-3
              BA.2.6    .pic20bit Directive                             BA-3
              BA.2.7    The .__.CPU.  Variable                          BA-4
              BA.2.8    .picfix Directive                               BA-4
              BA.2.9    .maxram Directive                               BA-5
              BA.2.10   .badram Directive                               BA-5
              BA.2.11   .setdmm Directive                               BA-5
              BA.3    12-BIT OPCODE PIC                                 BA-6
              BA.4    14-BIT OPCODE PIC                                 BA-6
              BA.5    16-BIT OPCODE PIC                                 BA-8
              BA.6    20-BIT ADDRESSING PIC                             BA-9
              BA.7    PIC OPCODES                                      BA-10

            APPENDIX BB  ASRAB ASSEMBLER                                BB-1
              BB.1    ACKNOWLEDGMENT                                    BB-1
              BB.2    PROCESSOR SPECIFIC DIRECTIVES                     BB-1
              BB.2.1    .r2k Directive                                  BB-2
              BB.2.2    .hd64 Directive                                 BB-2
              BB.2.3    .z80 Directive                                  BB-2
              BB.2.4    The .__.CPU.  Variable                          BB-3
              BB.3    RABBIT 2000/3000 ADDRESSING AND INSTRUCTIONS      BB-4
              BB.3.1    Instruction Symbols                             BB-4
              BB.3.2    Rabbit Instructions                             BB-6
              BB.4    Z80/HD64180 ADDRESSING AND INSTRUCTIONS           BB-8
              BB.4.1    Inherent Instructions                           BB-9
              BB.4.2    Implicit Operand Instructions                   BB-9
              BB.4.3    Load Instruction                               BB-10
              BB.4.4    Call/Return Instructions                       BB-10
              BB.4.5    Jump and Jump to Subroutine Instructions       BB-10
              BB.4.6    Bit Manipulation Instructions                  BB-11
              BB.4.7    Interrupt Mode and Reset Instructions          BB-11
              BB.4.8    Input and Output Instructions                  BB-11
              BB.4.9    Register Pair Instructions                     BB-11
              BB.4.10   HD64180 Specific Instructions                  BB-12

            APPENDIX BC  ASSCMP ASSEMBLER                               BC-1
              BC.1    SC/MP REGISTER SET                                BC-1
              BC.2    SC/MP ADDRESSING MODES                            BC-1

                                                                   Page xiii

              BC.3    SC/MP INSTRUCTION SET                             BC-2
              BC.3.1    Memory Reference Instructions                   BC-2
              BC.3.2    Immediate Instructions                          BC-2
              BC.3.3    Extension Register Instructions                 BC-3
              BC.3.4    Memory Increment/Decrement Instructions         BC-3
              BC.3.5    Transfer Instructions                           BC-3
              BC.3.6    Pointer Register Move Instructions              BC-3
              BC.3.7    Shift, Rotate, Serial I/O Instructions          BC-3
              BC.3.8    Single-Byte Miscellaneous Instructions          BC-4
              BC.3.9    Double-Byte Miscellaneous Instruction           BC-4

            APPENDIX BD  ASZ8 ASSEMBLER                                 BD-1
              BD.1    Z8 REGISTER SET                                   BD-1
              BD.2    Z8 INSTRUCTION SET                                BD-1
              BD.2.1    Load Instructions                               BD-2
              BD.2.2    Arithmetic Instructions                         BD-2
              BD.2.3    Logical Instructions                            BD-3
              BD.2.4    Program Control Instructions                    BD-3
              BD.2.5    Bit Manipulation Instructions                   BD-3
              BD.2.6    Block Transfer Instructions                     BD-3
              BD.2.7    Rotate and Shift Instructions                   BD-3
              BD.2.8    Cpu Control Instructions                        BD-3

            APPENDIX BE  ASZ80 ASSEMBLER                                BE-1
              BE.1    .z80 DIRECTIVE                                    BE-1
              BE.2    .hd64 DIRECTIVE                                   BE-1
              BE.3    THE .__.CPU.  VARIABLE                            BE-2
              BE.4    Z80 REGISTER SET AND CONDITIONS                   BE-2
              BE.5    Z80 INSTRUCTION SET                               BE-3
              BE.5.1    Inherent Instructions                           BE-4
              BE.5.2    Implicit Operand Instructions                   BE-4
              BE.5.3    Load Instruction                                BE-5
              BE.5.4    Call/Return Instructions                        BE-5
              BE.5.5    Jump and Jump to Subroutine Instructions        BE-5
              BE.5.6    Bit Manipulation Instructions                   BE-6
              BE.5.7    Interrupt Mode and Reset Instructions           BE-6
              BE.5.8    Input and Output Instructions                   BE-6
              BE.5.9    Register Pair Instructions                      BE-6
              BE.5.10   HD64180/Z180 Specific Instructions              BE-7

                                                                      Page 2

                                      P R E F A C E

               The  ASxxxx  assemblers  were  written following the style of
            several unfinished cross assemblers found in the Digital  Equip-
            ment  Corporation  Users  Society  (DECUS) distribution of the C
            programming language.  The incomplete DECUS  code  was  provided
            with  no  documentation  as  to  the  input syntax or the output
            format.  I wish to thank the author for inspiring  me  to  begin
            the development of this set of assemblers.

               The  ASLINK  program was written as a companion to the ASxxxx
            assemblers, its design and implementation was not  derived  from
            any other work.

               I  would  greatly  appreciate  receiving  the  details of any
            changes, additions, or errors pertaining to these  programs  and
            will  attempt  to  incorporate  any  fixes  or  generally useful
            changes in a future update to these programs.

                    Alan R.  Baldwin
                    Kent State University
                    Physics Department
                    Kent, Ohio 44242
                    U.S.A.

                    http://shop-pdp.kent.edu/

                    baldwin@kent.edu
                    baldwin@shop-pdp.kent.edu
                    tel:  (330) 672 2531
                    fax:  (330) 672 2959

                                                                      Page 3

                   E N D   U S E R   L I C E N S E   A G R E E M E N T

               Copyright (C) 1989-2009 Alan R.  Baldwin

               This  program  is  free  software:   you  can redistribute it
            and/or modify it under the  terms  of  the  GNU  General  Public
            License  as  published  by  the Free Software Foundation, either
            version 3 of the License, or (at your option) any later version.

               This  program is distributed in the hope that it will be use-
            ful, but WITHOUT ANY WARRANTY;  without even  the  implied  war-
            ranty  of  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.
            See the GNU General Public License for more details.

               You  should  have  received  a copy of the GNU General Public
            License   along   with    this    program.     If    not,    see
            <http://www.gnu.org/licenses/>.

                                                                      Page 4

                                 C O N T R I B U T O R S

            Thanks  to Marko Makela for his contribution of the AS6500 cross
            assembler.

                    Marko Makela
                    Sillitie 10 A
                    01480 Vantaa
                    Finland
                    Internet: Marko dot Makela at Helsinki dot Fi
                    EARN/BitNet: msmakela at finuh

            Thanks  to John Hartman for his contribution of the AS8051 cross
            assembler and updates to the ASxxxx and ASLINK internals.

                    John L. Hartman
                    jhartman at compuserve dot com
                    noice at noicedebugger dot com

            Thanks  to  G.   Osborn  for  his  contributions  to LKS19.C and
            LKIHX.C.

                    G. Osborn
                    gary at s-4 dot com

            Thanks to Ken Hornstein for his contribution of object libraries
            contained in LKLIBR.C.

                    Ken Hornstein
                    kenh at cmf dot nrl dot navy dot mil

                                                                      Page 5

            Thanks  to  Bill  McKinnon for his contributions to the AS8XCXXX
            cross assembler for the DS8XCXXX series of microprocessors.

                    Bill McKinnon
                    w_mckinnon at conknet dot com

            Thanks  to Roger Ivie for his contribution of the ASGB cross as-
            sembler for the GameBoy.

                    Roger Ivie
                    ivie at cc dot usu dot edu

            Thanks  to  Uwe  Steller for his contribution of the AS740 cross
            assembler.

                    Uwe Stellar
                    Uwe dot Steller at t-online dot de

            Thanks  to  Shujen Chen for his contribution of the AS1802 cross
            assembler.

                    Shugen Chen
                    DeVry University
                    Tinley Park IL
                    schen at tp dot devry dot edu

            Thanks  to  Edgar Puehringer for his contribution of the AS61860
            cross assembler.

                    Edgar Puehringer
                    edgar_pue at yahoo dot com

                                                                      Page 6

            Thanks to Ulrich Raich and Razaq Ijoduola for their contribution
            of the ASRAB cross assembler.

                    Ulrich Raich and Razaq Ijoduola
                    PS Division
                    CERN
                    CH-1211 Geneva-23
                    Ulrich dot Raich at cern dot ch

            Thanks  to Patrick Head for his contribution of the ASEZ80 cross
            assembler.

                    Patrick Head
                    patrick at phead dot net

            Thanks  to  Boisy  G.   Pitre for contributing the .ifeq, .ifne,
            .ifgt, .iflt, .ifle, and .ifge conditional  directives  and  the
            Tandy Color Computer Disk Basic binary output for ASLINK.

                    Boisy G. Pitre
                    boisy at boisypitre dot com

            Thanks  to  Mike  McCarty for his contributions to the processor
            cycle count option of the ASxxxx Assemblers.

                    Mike McCarty
                    mike dot mccarty at sbcglobal dot net

                                                                      Page 7

            ASxxxx Cross Assemblers, Version 5.00, April 2009

            Submitted by Alan R.  Baldwin,
            Kent State University, Kent, Ohio

            Operating System:  Linux, Windows, MS-DOS
            or other supporting ANSI C.

            Source Langauge:  C

            Abstract:

               The  ASxxxx  assemblers are a series of microprocessor assem-
            blers written in the C programming  language.   This  collection
            contains  cross  assemblers  for the 1802, S2650, SC/MP, MPS430,
            61860, 6500,  6800(6802/6808),  6801(6803/HD6303),  6804,  6805,
            68HC(S)08,     6809,    68HC11,    68HC(S)12,    68HC16,    740,
            8048(8041/8022/8021)  8051,  8085(8080),  DS8xCxxx,  AVR,  EZ80,
            F2MC8L/FX,  GameBoy(Z80), H8/3xx, Cypress PSoC(M8C), PIC, Rabbit
            2000/3000, Z8, and Z80(HD64180)  series  microprocessors.   Each
            assembler  has  a  device  specific section which includes:  (1)
            device description, byte order, and file extension  information,
            (2) a table of assembler general directives, special directives,
            assembler mnemonics and associated operation codes, (3)  machine
            specific  code  for  processing the device mnemonics, addressing
            modes, and special directives.

               The assemblers have a common device independent section which
            handles the details of file input/output, symbol  table  genera-
            tion,  program/data  areas,  expression  analysis, and assembler
            directive processing.

               The  assemblers  provide  the following features:  (1) alpha-
            betized, formatted symbol table listings, (2) relocatable object
            modules, (3) global symbols for linking object modules, (4) con-
            ditional assembly directives, (5) reusable  local  symbols,  (6)
            include-file  processing,  and  (7)  a  general macro processing
            facility.

               The  companion program ASLINK is a relocating linker perform-
            ing the following functions:  (1) bind multiple  object  modules
            into  a  single  memory  image,  (2) resolve inter-module symbol
            references,  (3)  resolve  undefined  symbols   from   specified
            librarys of object modules, (4) process absolute, relative, con-
            catenated, and overlay attributes in data and program  sections,
            (5)  perform  byte and word program-counter relative (pc or pcr)
            addressing calculations, (6) define absolute  symbol  values  at
            link  time, (7) define absolute area base address values at link
            time, (8) produce an Intel Hex  record,  Motorola  S  record  or
            Tandy  CoCo  Disk  Basic  output  file, (9) produce a map of the
            linked memory  image,  and  (10)  update  the  ASxxxx  assembler
            listing files with the absolute linked addresses and data.

                                                                      Page 8

               The  assemblers  and  linker have been tested using Linux and
            DJGPP, Cygwin, Symantec C/C++ V7.2, Borland Turbo C++ 3.0,  Open
            Watcom V1.7a, VC6, and Visual Studio 2005.  Complete source code
            and documentation for the assemblers and linker is included with
            the  distribution.   Additionally,  test code for each assembler
            and several microprocessor monitors (  ASSIST05  for  the  6805,
            MONDEB  and ASSIST09 for the 6809, and BUFFALO 2.5 for the 6811)
            are included as working examples of use of these assemblers.

                                        CHAPTER 1

                                      THE ASSEMBLER

            1.1  THE ASXXXX ASSEMBLERS

               The  ASxxxx  assemblers are a series of microprocessor assem-
            blers written in the C programming language.  Each assembler has
            a device specific section which includes:

                 1.  device  description, byte order, and file extension in-
                     formation

                 2.  a  table  of  the assembler general directives, special
                     device directives, assembler mnemonics  and  associated
                     operation codes

                 3.  machine specific code for processing the device mnemon-
                     ics, addressing modes, and special directives

            The device specific information is detailed in the appendices.

               The assemblers have a common device independent section which
            handles the details of file input/output, symbol  table  genera-
            tion,  program/data  areas,  expression  analysis, and assembler
            directive processing.

            The assemblers provide the following features:

                 1.  Command string control of assembly functions

                 2.  Alphabetized, formatted symbol table listing

                 3.  Relocatable object modules

                 4.  Global symbols for linking object modules

                 5.  Conditional assembly directives

            THE ASSEMBLER                                           PAGE 1-2
            THE ASXXXX ASSEMBLERS

                 6.  Program sectioning directives

               ASxxxx assembles one or more source files into a single relo-
            catable ascii object file.  The output of the ASxxxx  assemblers
            consists of an ascii relocatable object file(*.rel), an assembly
            listing file(*.lst), and a symbol file(*.sym).

            1.1.1  Assembly Pass 1

               During  pass  1, ASxxxx opens all source files and performs a
            rudimentary assembly of each source statement.  During this pro-
            cess  all symbol tables are built, program sections defined, and
            number of bytes for each assembled source line is estimated.

               At the end of pass 1 all undefined symbols may be made global
            (external) using the ASxxxx switch -g, otherwise undefined  sym-
            bols will be flagged as errors during succeeding passes.

            1.1.2  Assembly Pass 2

               During  pass  2  the ASxxxx assembler resolves forward refer-
            ences and determines the number  of  bytes  for  each  assembled
            line.   The  number  of bytes used by a particular assembler in-
            struction may depend upon the addressing mode, whether  the  in-
            struction allows multiple forms based upon the relative distance
            to the addressed location, or other factors.   Pass  2  resolves
            these cases and determines the address of all symbols.

            1.1.3  Assembly Pass 3

               Pass 3 by the assembler generates the listing file, the relo-
            catable output file, and the symbol tables.  Also during pass  3
            the errors will be reported.

               The  relocatable object file is an ascii file containing sym-
            bol references and definitions, program  area  definitions,  and
            the  relocatable assembled code, the linker ASLINK will use this
            information to generate an absolute load file  (Intel,  Motorola
            or Tandy CoCo Disk Basic formats).

            THE ASSEMBLER                                           PAGE 1-3
            SOURCE PROGRAM FORMAT

            1.2  SOURCE PROGRAM FORMAT

            1.2.1  Statement Format

               A source program is composed of assembly-language statements.
            Each statement must be completed on one line.  A line  may  con-
            tain a maximum of 128 characters, longer lines are truncated and
            lost.

               An  ASxxxx  assembler  statement  may  have  as  many as four
            fields.  These fields are identified by their order  within  the
            statement  and/or  by separating characters between fields.  The
            general format of the ASxxxx statement is:

                  [label:]  Operator        Operand         [;Comment(s)]

               The  label and comment fields are optional.  The operator and
            operand fields are interdependent.  The operator field may be an
            assembler  directive or an assembly mnemonic.  The operand field
            may be optional or required as defined in  the  context  of  the
            operator.

               ASxxxx  interprets  and  processes source statements one at a
            time.  Each statement causes a particular operation to  be  per-
            formed.

            1.2.1.1  Label Field  -

               A  label is a user-defined symbol which is assigned the value
            of the current location counter and entered into  the  user  de-
            fined  symbol  table.   The  current location counter is used by
            ASxxxx to assign memory addresses to the source  program  state-
            ments as they are encountered during the assembly process.  Thus
            a label is a means  of  symbolically  referring  to  a  specific
            statement.

               When  a program section is absolute, the value of the current
            location counter is absolute;  its value references an  absolute
            memory  address.   Similarly, when a program section is relocat-
            able, the value of the current location counter is  relocatable.
            A  relocation  bias  calculated at link time is added to the ap-
            parent value of the current location counter  to  establish  its
            effective  absolute  address  at  execution time.  (The user can
            also force the linker to relocate sections defined as  absolute.
            This may be required under special circumstances.)

               If  present,  a  label  must  be  the first field in a source
            statement and must be terminated by a colon (:).   For  example,

            THE ASSEMBLER                                           PAGE 1-4
            SOURCE PROGRAM FORMAT

            if  the  value  of  the  current  location  counter  is absolute
            01F0(H), the statement:

                  abcd:     nop

            assigns  the  value  01F0(H) to the label abcd.  If the location
            counter value were relocatable, the final value of abcd would be
            01F0(H)+K, where K represents the relocation bias of the program
            section, as calculated by the linker at link time.

               More  than  one label may appear within a single label field.
            Each label so specified is assigned the same address value.  For
            example,  if  the  value  of  the  current  location  counter is
            1FF0(H), the multiple labels in the following statement are each
            assigned the value 1FF0(H):

                  abcd:     aq:     $abc:   nop

               Multiple labels may also appear on successive lines.  For ex-
            ample, the statements

                  abcd:
                  aq:
                  $abc:     nop

            likewise  cause  the  same value to be assigned to all three la-
            bels.

               A  double  colon  (::)  defines the label as a global symbol.
            For example, the statement

                  abcd::    nop

            establishes the label abcd as a global symbol.  The distinguish-
            ing attribute of a global symbol is that it  can  be  referenced
            from  within an object module other than the module in which the
            symbol is defined.  References to this label  in  other  modules
            are  resolved when the modules are linked as a composite execut-
            able image.

            The legal characters for defining labels are:

                    A through Z
                    a through z
                    0 through 9
                    . (Period)
                    $ (Dollar sign)
                    _ (underscore)

               A  label  may  be  any  length,  however  only  the  first 79
            characters are significant and, therefore must be  unique  among
            all   labels  in  the  source  program  (not  necessarily  among

            THE ASSEMBLER                                           PAGE 1-5
            SOURCE PROGRAM FORMAT

            separately compiled modules).  An error code(s) (m or p) will be
            generated  in the assembly listing if the first 79 characters in
            two or more labels are the same.  The m code is  caused  by  the
            redeclaration  of  the symbol or its reference by another state-
            ment.  The p code is generated because the symbols  location  is
            changing on each pass through the source file.

               The  label  must  not  start with the characters 0-9, as this
            designates a reusable symbol with special  attributes  described
            in a later section.

               The  label  must  not  start  with  the  sequence $$, as this
            represents the temporary radix 16 for constants.

            1.2.1.2  Operator Field  -

               The  operator field specifies the action to be performed.  It
            may consist of an instruction mnemonic (op code) or an assembler
            directive.

               When  the  operator is an instruction mnemonic, a machine in-
            struction is generated and the assembler evaluates the addresses
            of  the operands which follow.  When the operator is a directive
            ASxxxx performs certain control actions or processing operations
            during assembly of the source program.

               Leading  and  trailing  spaces  or tabs in the operator field
            have no significance;  such characters serve  only  to  separate
            the operator field from the preceeding and following fields.

               An operator is terminated by a space, tab or end of line.

            1.2.1.3  Operand Field  -

               When  the  operator is an instruction mnemonic (op code), the
            operand  field  contains  program  variables  that  are  to   be
            evaluated/manipulated by the operator.

               Operands  may  be  expressions  or  symbols, depending on the
            operator.  Multiple expressions used in the operand  fields  may
            be  separated  by a comma.  An operand should be preceeded by an
            operator field;  if it is not, the statement will give an  error
            (q  or  o).   All  operands  following instruction mnemonics are
            treated as expressions.

               The operand field is terminated by a semicolon when the field
            is followed  by  a  comment.   For  example,  in  the  following
            statement:

                  label:    lda     abcd,x          ;Comment field

            THE ASSEMBLER                                           PAGE 1-6
            SOURCE PROGRAM FORMAT

            the  tab  between lda and abcd terminates the operator field and
            defines the beginning of the operand field;  a  comma  separates
            the operands abcd and x;  and a semicolon terminates the operand
            field and defines the beginning of the comment field.   When  no
            comment  field  follows,  the operand field is terminated by the
            end of the source line.

            1.2.1.4  Comment Field  -

               The comment field begins with a semicolon and extends through
            the end of the line.  This field is optional and may contain any
            7-bit ascii character except null.

               Comments  do not affect assembly processing or program execu-
            tion.

            1.3  SYMBOLS AND EXPRESSIONS

               This  section  describes the generic components of the ASxxxx
            assemblers:  the character set, the conventions observed in con-
            structing  symbols,  and  the use of numbers, operators, and ex-
            pressions.

            1.3.1  Character Set

               The following characters are legal in ASxxxx source programs:

                 1.  The  letters  A  through Z.  Both upper- and lower-case
                     letters are acceptable.  The  assemblers,  by  default,
                     are  case  sensitive,  i.e.   ABCD and abcd are not the
                     same symbols.  (The assemblers can be made case  insen-
                     sitive by using the -z command line option.)

                 2.  The digits 0 through 9

                 3.  The  characters . (period), $ (dollar sign), and _ (un-
                     derscore).

                 4.  The special characters listed in Tables 1 through 6.

               Tables  1  through  6  describe  the various ASxxxx label and
            field terminators, assignment operators, operand separators, as-
            sembly, unary, binary, and radix operators.

            THE ASSEMBLER                                           PAGE 1-7
            SYMBOLS AND EXPRESSIONS

            Table 1         Label Terminators and Assignment Operators
            ----------------------------------------------------------------

                    :   Colon               Label terminator.

                    ::  Double colon        Label  Terminator;   defines the
                                            label as a global label.

                    =   Equal sign          Direct assignment operator.

                    ==  Global equal        Direct assignment operator;  de-
                                            fines the  symbol  as  a  global
                                            symbol.

                    =:  Local equal         Direct assignment operator;  de-
                                            fines the symbol as a local sym-
                                            bol.

            ----------------------------------------------------------------

            Table 2         Field Terminators and Operand Separators
            ----------------------------------------------------------------

                        Tab                 Item or field terminator.

                        Space               Item or field terminator.

                    ,   Comma               Operand field separator.

                    ;   Semicolon           Comment field indicator.

            ----------------------------------------------------------------

            THE ASSEMBLER                                           PAGE 1-8
            SYMBOLS AND EXPRESSIONS

            Table 3         Assembler Operators
            ----------------------------------------------------------------

                    #   Number sign         Immediate expression indicator.

                    .   Period              Current location counter.

                    (   Left parenthesis    Expression delimiter.

                    )   Right parenthesis   Expression delimeter.

            ----------------------------------------------------------------

            Table 4         Unary Operators
            ----------------------------------------------------------------

                    <   Left bracket        <FEDC   Produces  the lower byte
                                                    value of the expression.
                                                    (DC)

                    >   Right bracket       >FEDC   Produces  the upper byte
                                                    value of the expression.
                                                    (FE)

                    +   Plus sign           +A      Positive value of A

                    -   Minus sign          -A      Produces   the  negative
                                                    (2's complement) of A.

                    ~   Tilde               ~A      Produces the 1's comple-
                                                    ment of A.

                    '   Single quote        'D      Produces  the  value  of
                                                    the character D.

                    "   Double quote        "AB     Produces the double byte
                                                    value for AB.

                    \   Backslash           '\n     Unix style characters
                                                    \b, \f, \n, \r, \t
                                         or '\001   or octal byte values.

            ----------------------------------------------------------------

            THE ASSEMBLER                                           PAGE 1-9
            SYMBOLS AND EXPRESSIONS

            Table 5         Binary Operators
            ----------------------------------------------------------------

                    <<  Double          0800 << 4   Produces the 4 bit
                        Left bracket                left-shifted   value  of
                                                    0800.  (8000)

                    >>  Double          0800 >> 4   Produces the 4 bit
                        Right bracket               right-shifted  value  of
                                                    0800.  (0080)

                    +   Plus sign       A + B       Arithmetic      Addition
                                                    operator.

                    -   Minus sign      A - B       Arithmetic   Subtraction
                                                    operator.

                    *   Asterisk        A * B       Arithmetic   Multiplica-
                                                    tion operator.

                    /   Slash           A / B       Arithmetic      Division
                                                    operator.

                    &   Ampersand       A & B       Logical AND operator.

                    |   Bar             A | B       Logical OR operator.

                    %   Percent sign    A % B       Modulus operator.

                    ^   Up arrow or     A ^ B       EXCLUSIVE OR operator.
                        circumflex

            ----------------------------------------------------------------

            Table 6         Temporary Radix Operators
            ----------------------------------------------------------------

                    $%,   0b, 0B            Binary radix operator.

                    $&,   0o, 0O, 0q, 0Q    Octal radix operator.

                    $#,   0d, 0D            Decimal radix operator.

                    $$,   0h, 0H, 0x, 0X    Hexidecimal radix operator.

                    Potential  ambiguities arising from the use of 0b and 0d
                    as temporary radix  operators  may  be  circumvented  by

            THE ASSEMBLER                                          PAGE 1-10
            SYMBOLS AND EXPRESSIONS

                    preceding  all non-prefixed hexidecimal numbers with 00.
                    Leading 0's are required in any  case  where  the  first
                    hexidecimal  digit is abcdef as the assembler will treat
                    the letter sequence as a label.

            ----------------------------------------------------------------

            1.3.2  User-Defined Symbols

               User-defined  symbols are those symbols that are equated to a
            specific value through a direct assignment statement  or  appear
            as  labels.  These symbols are added to the User Symbol Table as
            they are encountered during assembly.

            The following rules govern the creation of user-defined symbols:

                 1.  Symbols  can  be  composed  of alphanumeric characters,
                     dollar signs ($),  periods  (.),  and  underscores  (_)
                     only.

                 2.  The  first  character  of a symbol must not be a number
                     (except in the case of reusable symbols).

                 3.  The  first 79 characters of a symbol must be unique.  A
                     symbol  can  be  written  with  more  than   79   legal
                     characters,  but the 80th and subsequent characters are
                     ignored.

                 4.  Spaces and Tabs must not be embedded within a symbol.

            1.3.3  Reusable Symbols

               Reusable  symbols are specially formatted symbols used as la-
            bels within a block of coding that has been delimited as a reus-
            able symbol block.  Reusable symbols are of the form n$, where n
            is a decimal integer from 0 to 65535,  inclusive.   Examples  of
            reusable symbols are:

                  1$
                  27$
                  138$
                  244$

            THE ASSEMBLER                                          PAGE 1-11
            SYMBOLS AND EXPRESSIONS

               The range of a reusable symbol block consists of those state-
            ments between two normally constructed  symbolic  labels.   Note
            that a statement of the form:

                  ALPHA = EXPRESSION

            is a direct assignment statement but does not create a label and
            thus does not delimit the range of a reusable symbol block.

               Note  that  the  range  of a reusable symbol block may extend
            across program areas.

               Reusable symbols provide a convenient means of generating la-
            bels for branch instructions and other  such  references  within
            reusable symbol blocks.  Using reusable symbols reduces the pos-
            sibility of symbols with multiple definitions appearing within a
            user  program.   In  addition,  the use of reusable symbols dif-
            ferentiates entry-point labels from other labels, since reusable
            labels cannot be referenced from outside their respective symbol
            blocks.  Thus, reusable symbols of the same name can  appear  in
            other  symbol blocks without conflict.  Reusable symbols require
            less symbol table space  than  normal  symbols.   Their  use  is
            recommended.

               The  use  of  the  same reusable symbol within a symbol block
            will generate one or both of the m or p errors.

            Example of reusable symbols:

                    a:      ldx     #atable ;get table address
                            lda     #0d48   ;table length
                    1$:     clr     ,x+     ;clear
                            deca
                            bne     1$

                    b:      ldx     #btable ;get table address
                            lda     #0d48   ;table length
                    1$:     clr     ,x+     ;clear
                            deca
                            bne     1$

            THE ASSEMBLER                                          PAGE 1-12
            SYMBOLS AND EXPRESSIONS

            1.3.4  Current Location Counter

               The  period  (.) is the symbol for the current location coun-
            ter.  When used in the operand  field  of  an  instruction,  the
            period   represents  the  address  of  the  first  byte  of  the
            instruction:

                    AS:     ldx     #.      ;The period (.) refers to
                                            ;the address of the ldx
                                            ;instruction.

               When  used  in  the  operand field of an ASxxxx directive, it
            represents the address of the current byte or word:

                    QK = 0

                    .word   0xFFFE,.+4,QK   ;The operand .+4 in the .word
                                            ;directive represents a value
                                            ;stored in the second of the
                                            ;three words during assembly.

               If  we  assume  the  current  value of the program counter is
            0H0200, then during assembly, ASxxxx  reserves  three  words  of
            storage  starting  at  location 0H0200.  The first value, a hex-
            idecimal constant FFFE, will be stored at location 0H0200.   The
            second  value  represented  by  .+4  will  be stored at location
            0H0202, its value will be 0H0206 ( = 0H0202  +  4).   The  third
            value  defined  by  the  symbol  QK  will  be placed at location
            0H0204.

               At the beginning of each assembly pass, ASxxxx resets the lo-
            cation counter.  Normally, consecutive memory locations are  as-
            signed  to  each  byte  of  object code generated.  However, the
            value of the location counter can be changed  through  a  direct
            assignment statement of the following form:

                  . = . + expression

               The  new  location  counter can only be specified relative to
            the current location counter.  Neglecting to specify the current
            program  counter  along with the expression on the right side of
            the assignment operator will generate the (.) error.   (Absolute
            program areas may use the .org directive to specify the absolute
            location of the current program counter.)

            The following coding illustrates the use of the current location
            counter:

                    .area   CODE1   (ABS)   ;program area CODE1
                                            ;is ABSOLUTE

            THE ASSEMBLER                                          PAGE 1-13
            SYMBOLS AND EXPRESSIONS

                    .org    0H100           ;set location to
                                            ;0H100 absolute

            num1:   ldx     #.+0H10         ;The label num1 has
                                            ;the value 0H100.
                                            ;X is loaded with
                                            ;0H100 + 0H10

                    .org    0H130           ;location counter
                                            ;set to 0H130

            num2:   ldy     #.              ;The label num2 has
                                            ;the value 0H130.
                                            ;Y is loaded with
                                            ;value 0H130.

                    .area   CODE2   (REL)   ;program area CODE2
                                            ;is RELOCATABLE

                    . = . + 0H20            ;Set location counter
                                            ;to relocatable 0H20 of
                                            ;the program section.

            num3:   .word   0               ;The label num3 has
                                            ;the value
                                            ;of relocatable 0H20.

                    . = . + 0H40            ;will reserve 0H40
                                            ;bytes of storage as will
                    .blkb   0H40            ;or
                    .blkw   0H20

               The  .blkb  and .blkw directives are the preferred methods of
            allocating space.

            1.3.5  Numbers

               ASxxxx  assumes that all numbers in the source program are to
            be interpreted in decimal radix unless otherwise specified.  The
            .radix  directive  may  be used to specify the default as octal,
            decimal, or hexidecimal.  Individual numbers can  be  designated
            as  binary, octal, decimal, or hexidecimal through the temporary
            radix prefixes shown in table 6.

               Negative  numbers  must be preceeded by a minus sign;  ASxxxx
            translates such numbers into two's  complement  form.   Positive
            numbers may (but need not) be preceeded by a plus sign.

            THE ASSEMBLER                                          PAGE 1-14
            SYMBOLS AND EXPRESSIONS

               Numbers are always considered to be absolute values, therefor
            they are never relocatable.

            1.3.6  Terms

               A  term is a component of an expression and may be one of the
            following:

                 1.  A number.

                 2.  A symbol:
                     1.  A  period (.) specified in an expression causes the
                         current location counter to be used.
                     2.  A User-defined symbol.
                     3.  An undefined symbol is assigned a value of zero and
                         inserted in the User-Defined symbol table as an un-
                         defined symbol.

                 3.  A single quote followed by a single ascii character, or
                     a double quote followed by two ascii characters.

                 4.  An  expression enclosed in parenthesis.  Any expression
                     so enclosed is evaluated and reduced to a  single  term
                     before  the remainder of the expression in which it ap-
                     pears is evaluated.  Parenthesis, for example,  may  be
                     used  to  alter the left-to-right evaluation of expres-
                     sions, (as in A*B+C versus A*(B+C)), or to apply a  un-
                     ary operator to an entire expression (as in -(A+B)).

                 5.  A unary operator followed by a symbol or number.

            1.3.7  Expressions

               Expressions  are  combinations  of  terms  joined together by
            binary operators.  Expressions reduce to a value.   The  evalua-
            tion  of  an expression includes the determination of its attri-
            butes.  A resultant expression value may be one of  three  types
            (as  described  later  in this section):  relocatable, absolute,
            and external.

            THE ASSEMBLER                                          PAGE 1-15
            SYMBOLS AND EXPRESSIONS

            Expressions are evaluate with an operand hierarchy as follows:

                    *       /       %       multiplication,
                                            division, and
                                            modulus first.

                    +       -               addition and
                                            subtraction second.

                    <<      >>              left shift and
                                            right shift third.

                    ^                       exclusive or fourth.

                    &                       logical and fifth.

                    |                       logical or last

                    except that unary operators take precedence over binary
                    operators.

               A  missing  or  illegal  operator  terminates  the expression
            analysis, causing error codes (o) and/or  (q)  to  be  generated
            depending upon the context of the expression itself.

               At assembly time the value of an external (global) expression
            is equal to the value of the absolute part of  that  expression.
            For  example,  the expression external+4, where 'external' is an
            external symbol, has the value of 4.  This expression,  however,
            when  evaluated  at link time takes on the resolved value of the
            symbol 'external', plus 4.

               Expressions,  when  evaluated  by  ASxxxx,  are  one of three
            types:  relocatable, absolute, or external.  The following  dis-
            tinctions are important:

                 1.  An  expression is relocatable if its value is fixed re-
                     lative to the base address of the program area in which
                     it appears;  it will have an offset value added at link
                     time.  Terms that contain labels defined in relocatable
                     program  areas  will  have  a relocatable value;  simi-
                     larly, a period (.)  in  a  relocatable  program  area,
                     representing  the value of the current program location
                     counter, will also have a relocatable value.

                 2.  An  expression  is  absolute if its value is fixed.  An
                     expression whose terms are numbers and ascii characters
                     will  reduce  to  an absolute value.  A relocatable ex-
                     pression or term minus a relocatable term,  where  both
                     elements  being  evaluated  belong  to the same program
                     area, is an absolute expression.  This is because every

            THE ASSEMBLER                                          PAGE 1-16
            SYMBOLS AND EXPRESSIONS

                     term  in  a  program area has the same relocation bias.
                     When one term is subtracted from the other the  reloca-
                     tion bias is zero.

                 3.  An  expression is external (or global) if it contains a
                     single global reference (plus or minus an absolute  ex-
                     pression  value) that is not defined within the current
                     program.  Thus, an external  expression  is  only  par-
                     tially  defined following assembly and must be resolved
                     at link time.

            1.4  GENERAL ASSEMBLER DIRECTIVES

               An  ASxxxx  directive  is placed in the operator field of the
            source line.  Only one directive is  allowed  per  source  line.
            Each  directive  may  have  a blank operand field or one or more
            operands.  Legal operands differ with each directive.

            1.4.1  .module Directive

            Format:

                    .module name

               The  .module  directive causes the name to be included in the
            assemblers output file as an identifier for this particular  ob-
            ject module.  The name may be from 1 to 79 characters in length.
            The name may not have any embedded white space (spaces or tabs).
            Only  one  identifier is allowed per assembled module.  The main
            use of this directive  is  to  allow  the  linker  to  report  a
            modules'  use  of undefined symbols.  At link time all undefined
            symbols are  reported  and  the  modules  referencing  them  are
            listed.

            1.4.2  .title Directive

            Format:

                    .title  string

               The .title directive provides a character string to be placed
            on the second line of each page during listing.  The string  be-
            gins  with  the first non white space character (after any space
            or tab) and ends with the end of the line.

            THE ASSEMBLER                                          PAGE 1-17
            GENERAL ASSEMBLER DIRECTIVES

            1.4.3  .sbttl Directive

            Format:

                    .sbttl  string

               The .sbttl directive provides a character string to be placed
            on the third line of each page during listing.  The  string  be-
            gins  with  the first non white space character (after any space
            or tab) and ends with the end of the line.

            1.4.4  .list and .nlist Directives

            Format:

                    .list                           ;Basic .list

                    .list   expr                    ;with expression

                    .list   (arg1,arg2,...,argn)    ;with sublist options

                    .nlist                          ;Basic .nlist

                    .nlist  expr                    ;with expression

                    .nlist  (arg1,arg2,...,argn)    ;with sublist options

            The  .list  and  .nlist directives control the listing output to
            the .lst  file.   The  directives  have  the  following  sublist
            options:

                    err     -       errors
                    loc     -       program location
                    bin     -       binary output
                    eqt     -       symbol or .if evaluation
                    cyc     -       opcode cycle count
                    lin     -       source line number
                    src     -       source line text
                    pag     -       pagination
                    lst     -       .list/.nlist line listing
                    md      -       macro definition listing
                    me      -       macro expansion listing
                    meb     -       macro expansion binary listing

                    !       -       sets the listing mode to
                                    !(.list) or !(.nlist) before
                                    applying the sublist options

            The  'normal' listing mode .list is the combination of err, loc,

            THE ASSEMBLER                                          PAGE 1-18
            GENERAL ASSEMBLER DIRECTIVES

            bin, eqt, cyc, lin, src, pag, lst, and md enabled  with  me  and
            meb  disabled.  The 'normal' listing mode .nlist has all sublist
            items disabled.  When specifying sublist options the option list
            must   be  enclosed  within  parenthesis  and  multiple  options
            seperated by commas.

               The NOT option, !, is used to set the listing mode to the op-
            posite of the .list or .nlist directive before applying the sub-
            list options.  For example:

                    .nlist  (!)     is equivalent to .list  and
                    .list   (!)     is equivalent to .nlist
                                    any additional options will
                                    be applied normally

               Normal  .list/.nlist processing is disabled within false con-
            ditional blocks.  However, the .list/.nlist with  an  expression
            can  override  this  behavior  if  the expression has a non zero
            value.

               Examples of listing options:

                    .list   (meb)   ; lists macro generated binary

                    .list   (me)    ; lists macro expansions

                    .nlist  (src)   ; .nlist src lines not listed

                    .nlist  (!,lst) ; list all except .nlist

                    .nlist          ; combination lists only
                    .list   (src)   ; the source line

                    .list   (!,src) ; list only the source line

                    .list   1       ; enable listing even within
                                    ; a FALSE conditional block

            1.4.5  .page Directive

            Format:

                    .page

               The .page directive causes a page ejection with a new heading
            to be printed.  The new page occurs after the next line  of  the
            source  program is processed, this allows an immediately follow-
            ing .sbttl directive to appear  on  the  new  page.   The  .page
            source  line will not appear in the file listing.  Paging may be
            disabled by invoking the -p directive or by using the directive:

            THE ASSEMBLER                                          PAGE 1-19
            GENERAL ASSEMBLER DIRECTIVES

                    .nlist  (pag)

               If  the .page directive is followed by a non zero constant or
            an expression that evaluates to a non zero value then pagination
            will be enabled within a false condition range to allow extended
            textual information to be incorporated  in  the  source  program
            with out the need to use the comment delimiter (;):

                    .if     0

                    .page   1       ;Enable pagination within 'if' block.
                    This text will be bypassed during assembly
                    but appear in the listing file.
                    .
                    .
                    .

                    .endif

            1.4.6  .msg Directive

            Format:

                    .msg     /string/               or

                    .msg    ^/string/

            where:  string  represents a text string.  The string is printed
                            to the console during the final assembly pass.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters  do  not  match, the .msg
                            directive will give the (q) error.

               The  .msg  directive  is  useful to report assembly status or
            other information during the assembly process.

            THE ASSEMBLER                                          PAGE 1-20
            GENERAL ASSEMBLER DIRECTIVES

            1.4.7  .error Directive

            Format:

                    .error exp

            where:  exp     represents   an  absolute  expression.   If  the
                            evaluation of the expression results  in  a  non
                            zero value then an 'e' error is reported and the
                            text line is listed in the generated error.

               The  .error  directive  is  useful to report configuration or
            value errors during the assembly process.  (The .error directive
            is  identical in function to the .assume directive, just perhaps
            more descriptive.)

            1.4.8  .byte, .db, and .fcb Directives

            Format:

                    .byte   exp             ;Stores the binary value
                    .db     exp             ;of the expression in the
                    .fcb    exp             ;next byte.

                    .byte   exp1,exp2,expn  ;Stores the binary values
                    .db     exp1,exp2,expn  ;of the list of expressions
                    .fcb    exp1,exp2,expn  ;in successive bytes.

            where:  exp,    represent expressions that will be
                    exp1,   truncated to 8-bits of data.
                    .       Each expression will be calculated,
                    .       the high-order byte will be truncated.
                    .       Multiple expressions must be
                    expn    separated by commas.

               The  .byte, .db, or .fcb directives are used to generate suc-
            cessive bytes of binary data in the object module.

            THE ASSEMBLER                                          PAGE 1-21
            GENERAL ASSEMBLER DIRECTIVES

            1.4.9  .word, .dw, and .fdb Directives

            Format:

                    .word   exp             ;Stores the binary value
                    .dw     exp             ;of the expression in
                    .fdb    exp             ;the next word.

                    .word   exp1,exp2,expn  ;Stores the binary values
                    .dw     exp1,exp2,expn  ;of the list of expressions
                    .fdb    exp1,exp2,expn  ;in successive words.

            where:  exp,    represent expressions that will occupy two
                    exp1,   bytes of data. Each expression will be
                    .       calculated as a 16-bit word expression.
                    .       Multiple expressions must be
                    expn    separated by commas.

               The  .word, .dw, or .fdb directives are used to generate suc-
            cessive words of binary data in the object module.

            1.4.10  .3byte and .triple Directives

            Format:

                    .3byte  exp             ;Stores the binary value
                    .triple exp             ;of the expression in
                                            ;the next triple (3 bytes).

                    .3byte  exp1,exp2,expn  ;Stores the binary values
                    .triple exp1,exp2,expn  ;of the list of expressions
                                            ;in successive triples
                                            ;(3 bytes).

            where:  exp,    represent expressions that will occupy three
                    exp1,   bytes of data. Each expression will be
                    .       calculated as a 24-bit word expression.
                    .       Multiple expressions must be
                    expn    separated by commas.

               The  .3byte  or .triple directive is used to generate succes-
            sive triples of binary data in the object module.  (These direc-
            tives   are  only  available  in  assemblers  supporting  24-bit
            addressing.)

            THE ASSEMBLER                                          PAGE 1-22
            GENERAL ASSEMBLER DIRECTIVES

            1.4.11  .4byte and .quad Directive

            Format:

                    .4byte  exp             ;Stores the binary value
                    .quad   exp             ;of the expression in
                                            ;the next quad (4 bytes).

                    .4byte  exp1,exp2,expn  ;Stores the binary values
                    .quad   exp1,exp2,expn  ;of the list of expressions
                                            ;in successive quads
                                            ;(4 bytes).

            where:  exp,    represent expressions that will occupy three
                    exp1,   bytes of data. Each expression will be
                    .       calculated as a 32-bit word expression.
                    .       Multiple expressions must be
                    expn    separated by commas.

               The  .4byte or .quad directive is used to generate successive
            quads of binary data in the object  module.   (These  directives
            are only available in assemblers supporting 32-bit addressing.)

            1.4.12  .blkb, .ds, ,rmb, and .rs Directives

            Format:

                    .blkb   N       ;reserve N bytes of space
                    .ds     N       ;reserve N bytes of space
                    .rmb    N       ;reserve N bytes of space
                    .rs     N       ;reserve N bytes of space

               The  .blkb, .ds, .rmb, and .rs directives reserve byte blocks
            in the object module;

            1.4.13  .blkw, .blk3, and .blk4 Directives

            Format:

                    .blkw   N       ;reserve N words of space
                    .blk3   N       ;reserve N triples of space
                    .blk4   N       ;reserve N quads of space

               The .blkw directive reserves word blocks;  the .blk3 reserves
            3  byte  blocks(available  in   assemblers   supporting   24-bit
            addressing);  the .blk4 reserves 4 byte blocks (available in as-
            semblers supporting 32-bit addressing).

            THE ASSEMBLER                                          PAGE 1-23
            GENERAL ASSEMBLER DIRECTIVES

            1.4.14  .ascii, .str, and .fcc Directives

            Format:

                    .ascii   /string/               or

                    .ascii  ^/string/

                    .fcc     /string/               or

                    .fcc    ^/string/

                    .str     /string/               or

                    .str    ^/string/

            where:  string  is a string of printable ascii characters.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters  do not match, the .ascii
                            directive will give the (q) error.

            The  .ascii,  .fcc, and .str directives place one binary byte of
            data for each character in the string into the object module.

            1.4.15  .ascis and .strs Directives

            Format:

                    .ascis   /string/               or

                    .ascis  ^/string/

                    .strs    /string/               or

                    .strs   ^/string/

            where:  string  is a string of printable ascii characters.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters  do not match, the .ascis
                            and .strs directives will give the (q) error.

            THE ASSEMBLER                                          PAGE 1-24
            GENERAL ASSEMBLER DIRECTIVES

               The .ascis and .strs directives place one binary byte of data
            for each character in the string into the  object  module.   The
            last character in the string will have the high order bit set.

            1.4.16  .asciz and .strz Directives

            Format:

                    .asciz   /string/               or

                    .asciz  ^/string/

                    .strz    /string/               or

                    .strz   ^/string/

            where:  string  is a string of printable ascii characters.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters  do not match, the .asciz
                            and .strz directive will give the (q) error.

               The .asciz and .strz directives place one binary byte of data
            for each character in the string into the object  module.   Fol-
            lowing  all  the  character data a zero byte is inserted to ter-
            minate the character string.

            1.4.17  .assume Directive

            Format:

                    .assume exp

            where:  exp     represents   an  absolute  expression.   If  the
                            evaluation of the expression results  in  a  non
                            zero value then an 'e' error is reported and the
                            text line is listed in the generated error.

               The  .assume  directive  is useful to check assumptions about
            assembler values.  (The .assume directive is identical in  func-
            tion to the .error directive, just perhaps more descriptive.)

            THE ASSEMBLER                                          PAGE 1-25
            GENERAL ASSEMBLER DIRECTIVES

            1.4.18  .radix Directive

            Format:

                    .radix  character

            where:  character  represents  a single character specifying the
                    default radix to be used for  succeeding  numbers.   The
                    character may be any one of the following:

                            B,b     Binary

                            O,o     Octal
                            Q,q

                            D,d     Decimal
                            'blank'

                            H,h     Hexidecimal
                            X,x

            1.4.19  .even Directive

            Format:

                    .even

               The .even directive ensures that the current location counter
            contains an even boundary value by adding 1 if the current loca-
            tion is odd.

            1.4.20  .odd Directive

            Format:

                    .odd

               The  .odd directive ensures that the current location counter
            contains an odd boundary value by adding one if the current  lo-
            cation is even.

            THE ASSEMBLER                                          PAGE 1-26
            GENERAL ASSEMBLER DIRECTIVES

            1.4.21  .bndry Directive

            Format:

                    .bndry  n

               If  the current location is not an integer multiple of n then
            the location counter is increased to the next  integer  multiple
            of n.

               As an example:

                    .bndry  4

            changes  the current location to be at a multiple of 4, a 4-byte
            boundary.

               The  relocation  and/or  concatenation  of an area containing
            .bndry directives to place code at specific boundaries will  NOT
            maintain  the  specified  boundaries.  When relocating such code
            areas you must specify the base addresses to the linker manually
            and/or  you must pad the allocated space of an area to match the
            boundary conditions.

               As  an  example  suppose  you wish to link multiple assembled
            code sections, each of which has code for the same area and  re-
            quires a 4 byte boundary.  The starting address of the area must
            be specified to the linker on a 4 byte  boundary  and  each  as-
            sembled code section must be padded to fill out the area in each
            of the individually assembled files.  The  following  code  will
            provide  the necessary area padding to allow a succesful linking
            of files and maintain the boundary requirements:

                    .$.end = .              ; end of area address
                    .bndry  4               ; set boundary
                    .if ne,. - .$.end       ; is . the same ?
                      . = . - 1             ; no: backup 1 byte
                      .byte 0               ; place padding byte
                    .endif

               If  all  files  are  assembled  simultaneously  then only the
            .bndry directive is required at the beginning  of  the  area  in
            each  file and the initial area address must be specified to the
            linker.

            THE ASSEMBLER                                          PAGE 1-27
            GENERAL ASSEMBLER DIRECTIVES

            1.4.22  .area Directive

            Format:

                    .area   name    [(options)]

            where:  name    represents the symbolic name of the program sec-
                            tion.   This  name  may  be  the  same  as   any
                            user-defined  symbol  or  bank as the area names
                            are independent  of  all  symbols,  labels,  and
                            banks.

                    options specify the type of program or data area:
                            ABS     absolute (automatically invokes OVR)
                            REL     relocatable
                            OVR     overlay
                            CON     concatenate
                            NOPAG   non-paged area
                            PAG     paged area

                    options specify a code or data segment:
                            CSEG    Code segment
                            DSEG    Data segment

                    option  specifies the data area bank:
                            BANK    Named collection of areas

               The .area directive provides a means of defining and separat-
            ing multiple programming and data sections.   The  name  is  the
            area  label used by the assembler and the linker to collect code
            from various separately assembled modules into one section.  The
            name may be from 1 to 79 characters in length.

               The options are specified within parenthesis and separated by
            commas as shown in the following example:

                    .area  TEST  (REL,CON)  ;This section is relocatable
                                            ;and concatenated with other
                                            ;sections of this program area.

                    .area  DATA  (REL,OVR)  ;This section is relocatable
                                            ;and overlays other sections
                                            ;of this program area.

                    .area  SYS   (ABS,OVR)  ;(CON not allowed with ABS)
                                            ;This section is defined as
                                            ;absolute. Absolute sections
                                            ;are always overlayed with
                                            ;other sections of this program
                                            ;area.

            THE ASSEMBLER                                          PAGE 1-28
            GENERAL ASSEMBLER DIRECTIVES

                    .area  PAGE  (PAG)      ;This is a paged section. The
                                            ;section must be on a 256 byte
                                            ;boundary and its length is
                                            ;checked by the linker to be
                                            ;no larger than 256 bytes.
                                            ;This is useful for direct page
                                            ;areas.

               The  default  area type is REL|CON;  i.e.  a relocatable sec-
            tion which is concatenated with other sections of code with  the
            same area name.  The ABS option indicates an absolute area.  The
            OVR and CON options indicate if program  sections  of  the  same
            name  will overlay each other (start at the same location) or be
            concatenated with each other (appended to each other).

               The  area can be specified as either a code segment, CSEG, or
            a data segment, DSEG.  The CSEG and DSEG descriptors are  useful
            when  the  microprocessor  code  and  data  unit allocations are
            unequal:  e.g.  the executable code  uses  an  allocation  of  2
            bytes for each instruction and is addressed at an increment of 1
            for every instruction, and the data uses an allocation of 1 byte
            for  each element and is addressed at an increment of 1 for each
            data byte.  The allocation units are defined by the architecture
            of the particular microprocessor.

               The  .area  directive also provides a means of specifying the
            bank this area is associated with.  All areas associated with  a
            particular  bank  are  combined  at  link  time  into a block of
            code/data.

               The  CSEG,  DSEG,  and  BANK options are specified within the
            parenthesis as shown in the following examples:

                    .area   C_SEG   (CSEG,BANK=C1)
                                            ;This is a code section
                                            ;and is included in bank C1
                    .area   D_SEG   (DSEG,BANK=D1)
                                            ;This is a data section
                                            ;and is included in bank D1.

               Multiple  invocations  of  the  .area directive with the same
            name must specify the same options or leave  the  options  field
            blank,  this  defaults  to  the previously specified options for
            this program area.

            THE ASSEMBLER                                          PAGE 1-29
            GENERAL ASSEMBLER DIRECTIVES

            The   ASxxxx   assemblers   automatically  provide  two  program
            sections:

                    '_CODE'         This  is  the  default  code/data  area.
                                    This   program   area   is    of    type
                                    (REL,CON,CSEG).

                    '_DATA'         This  is the default optional data area.
                                    This   program   area   is    of    type
                                    (REL,CON,DSEG).

            The  ASxxxx  assemblers  also automatically generate two symbols
            for each program area:

                    's_<area>'      This is the starting address of the pro-
                                    gram area.

                    'l_<area>'      This is the length of the program area.

            The .area names and options are never case sensitive.

            1.4.23  .bank Directive

            Format:

                    .bank   name    [(options)]

            where:  name    represents  the  symbolic  name of the bank sec-
                            tion.   This  name  may  be  the  same  as   any
                            user-defined  symbol  or  area as the bank names
                            are independent  of  all  symbols,  labels,  and
                            areas.   The name may be from 1 to 79 characters
                            in length.

                    options specify the parameters of the bank:
                            BASE    base address of bank
                            SIZE    maximum size of bank
                            FSFX    file suffix for this bank
                            MAP     NOICE mapping

               The  .bank  directive allows an arbitrary grouping of program
            and/or data areas to be communicated to the  linker.   The  bank
            parameters are all optional and are described as follows:

                 1.  BASE, the  starting  address of the bank (default is 0)
                     may be defined.  This address can be overridden by  us-
                     ing  the linker -b option for the first area within the
                     bank.  The bank address is always specified  in  'byte'
                     addressing.  A first area which is not 'byte' addressed

            THE ASSEMBLER                                          PAGE 1-30
            GENERAL ASSEMBLER DIRECTIVES

                     (e.g.  a processor addressed by a 'word' of 2  or  more
                     bytes)  has  the  area  address  scaled to begin at the
                     'byte' address.

                 2.  SIZE, the  maximum  length  of  the  bank  specified in
                     bytes.  The size is always specified in terms of bytes.

                 3.  FSFX, the file suffix to be used by the linker for this
                     bank.  The suffix may not contain embedded white space.

                 4.  MAP,  NOICE   mapping   parameter   for  this  bank  of
                     code/data.

               The options are specified within parenthesis and separated by
            commas as shown in the following example:

                    .BANK  C1  (BASE=0x0100,SIZE=0x1000,FSFX=_C1)
                                            ;This bank starts at 0x0100,
                                            ;has a maximum size of 0x1000,
                                            ;and is to be placed into
                                            ;a file with a suffix of _C1

               The parameters must be absolute (external symbols are not al-
            lowed.)

            1.4.24  .org Directive

            Format:

                    .org    exp

            where:  exp     is  an absolute expression that becomes the cur-
                            rent location counter.

            The  .org directive is valid only in an absolute program section
            and will give a (q) error if used in a relocatable program area.
            The  .org  directive specifies that the current location counter
            is to become the specified absolute value.

            THE ASSEMBLER                                          PAGE 1-31
            GENERAL ASSEMBLER DIRECTIVES

            1.4.25  .globl Directive

            Format:

                    .globl  sym1,sym2,...,symn

            where:  sym1,           represent legal symbolic names.
                    sym2,...        When multiple symbols are specified,
                    symn            they are separated by commas.

               A  .globl directive may also have a label field and/or a com-
            ment field.

               The  .globl directive is provided to export (and thus provide
            linkage to) symbols not  otherwise  defined  as  global  symbols
            within  a  module.   In  exporting  global symbols the directive
            .globl J is similar to:

                  J == expression or J::

               Because  object  modules  are linked by global symbols, these
            symbols are vital to a program.  All internal symbols  appearing
            within  a  given program must be defined at the end of pass 1 or
            they will be considered undefined.  The assembly directive  (-g)
            can  be  invoked to make all undefined symbols global at the end
            of pass 1.

               The  .globl directive and == construct can be overridden by a
            following .local directive.

                                          NOTE

                 The  ASxxxx  assemblers  use the last occurring symbol
                 specification in the source file(s) as the type  shown
                 in the symbol table and output to the .rel file.

            1.4.26  .local Directive

            Format:

                    .local  sym1,sym2,...,symn

            where:  sym1,           represent legal symbolic names.
                    sym2,...        When multiple symbols are specified,
                    symn            they are separated by commas.

               A  .local directive may also have a label field and/or a com-
            ment field.

            THE ASSEMBLER                                          PAGE 1-32
            GENERAL ASSEMBLER DIRECTIVES

               The  .local  directive is provided to define symbols that are
            local to the current assembly process.  Local  symbols  are  not
            effected  by  the assembler option -a (make all symbols global).
            In defining local symbols the directive .local J is similar to:

                  J =: expression

               The  .local directive and the =:  construct are useful in de-
            fining symbols and constants within a header or definition  file
            that contains many symbols specific to the current assembly pro-
            cess that should not be exported into the .rel output  file.   A
            typical  usage  is  in  the definition of SFRs (Special Function
            Registers) for a microprocessor.

               The .local directive and =:  construct can be overridden by a
            following .globl directive.

                                          NOTE

                 The  ASxxxx  assemblers  use the last occurring symbol
                 specification in the source file(s) as the type  shown
                 in the symbol table and output to the .rel file.

            1.4.27  .equ, .gblequ, and .lclequ Directives

            Format:

                    sym1    .equ    expr    ; equivalent to sym1  = expr
                    sym2    .gblequ expr    ; equivalent to sym2 == expr
                    sym3    .lclequ expr    ; equivalent to sym3 =: expr

                    or

                    .equ    sym1,   expr    ; equivalent to sym1  = expr
                    .gblequ sym2,   expr    ; equivalent to sym2 == expr
                    .lclequ sym3,   expr    ; equivalent to sym3 =: expr

               These  alternate  forms  of equivalence are provided for user
            convenience.

            THE ASSEMBLER                                          PAGE 1-33
            GENERAL ASSEMBLER DIRECTIVES

            1.4.28  .if, .else, and .endif Directives

            Format:

                    .if     expr
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  range of true condition will be processed if the expres-
            sion 'expr' is not zero (i.e.  true) and the range of false con-
            dition  will  be processed if the expression 'expr' is zero (i.e
            false).  The range of true condition is optional as is the .else
            directive  and  the range of false condition.  The following are
            all valid .if/.else/.endif constructions:

                    .if     A-4             ;evaluate A-4
                    .byte   1,2             ;insert bytes if A-4 is
                    .endif                  ;not zero

                    .if     K+3             ;evaluate K+3
                    .else
                    .byte   3,4             ;insert bytes if K+3
                    .endif                  ;is zero

                    .if     J&3             ;evaluate J masked by 3
                    .byte   12              ;insert this byte if J&3
                    .else                   ;is not zero
                    .byte   13              ;insert this byte if J&3
                    .endif                  ;is zero

            All .if/.else/.endif directives are limited to a maximum nesting
            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            THE ASSEMBLER                                          PAGE 1-34
            GENERAL ASSEMBLER DIRECTIVES

            1.4.29  .iff, .ift, and .iftf Directives

            Format:

                    .if     expr    ;'if' range Condition is
                                    ;TRUE when expr is not zero
                     .ift                                   ;}
                     .      ;} range of true condition      ;}
                     .iff                                   ;} if
                     .      ;} range of false condition     ;} block
                     .iftf                                  ;}
                     .      ;} unconditional range          ;}
                    .else           ;'else' range Condition is
                                    ;TRUE when expr is zero
                     .ift                                   ;}
                     .      ;} range of true condition      ;}
                     .iff                                   ;} else
                     .      ;} range of false condition     ;} block
                     .iftf                                  ;}
                     .      ;} unconditional range          ;}
                    .endif

               The  subconditional  assembly directives may be placed within
            conditional assembly blocks to indicate:

                    1. The assembly of an alternate body of code when
                       the condition of the block tests false.

                    2. The assembly of non-contiguous body of code
                       within the conditional assembly block,
                       depending upon the result of the conditional
                       test in entering the block.

                    3. The unconditional assembly of a body of code
                       within a conditional assembly block.

            The use of the .iff, .ift, and .iftf directives makes the use of
            the .else directive redundant.

               Note  that  the  implementation of the .else directive causes
            the .if tested condition to be complemented.  The TRUE and FALSE
            conditions are determined by the .if/.else conditional state.

               All  .if/.else/.endif  directives  are  limited  to a maximum
            nesting of 10 levels.

               The  use  of the .iff, .ift, or .iftf directives outside of a
            conditional block results in a (i) error code.

            THE ASSEMBLER                                          PAGE 1-35
            GENERAL ASSEMBLER DIRECTIVES

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.30  .ifxx Directives

               Additional  conditional  directives are available to test the
            value of an evaluated expression:

                    .ifne   expr            ; true if expr != 0
                    .ifeq   expr            ; true if expr == 0
                    .ifgt   expr            ; true if expr >  0
                    .iflt   expr            ; true if expr <  0
                    .ifge   expr            ; true if expr >= 0
                    .ifle   expr            ; true if expr <= 0

               Format:

                    .ifxx   expr
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  range of true condition will be processed if the expres-
            sion 'expr' is not zero (i.e.  true) and the range of false con-
            dition  will  be processed if the expression 'expr' is zero (i.e
            false).  The range of true condition is optional as is the .else
            directive  and  the range of false condition.  The following are
            all valid .ifxx/.else/.endif constructions:

                    .ifne   A-4             ;evaluate A-4
                    .byte   1,2             ;insert bytes if A-4 is
                    .endif                  ;not zero

                    .ifeq   K+3             ;evaluate K+3
                    .byte   3,4             ;insert bytes if K+3
                    .endif                  ;is zero

                    .ifne   J&3             ;evaluate J masked by 3
                    .byte   12              ;insert this byte if J&3
                    .else                   ;is not zero

            THE ASSEMBLER                                          PAGE 1-36
            GENERAL ASSEMBLER DIRECTIVES

                    .byte   13              ;insert this byte if J&3
                    .endif                  ;is zero

            All .if/.else/.endif directives are limited to a maximum nesting
            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.31  .ifdef Directive

            Format:

                    .ifdef  sym
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  range  of true condition will be processed if the symbol
            'sym' has been defined with a .define directive or  'sym'  is  a
            variable  with  an  assigned  value else the false range will be
            processed.  The range of true condition is optional  as  is  the
            .else directive and the range of false condition.  The following
            are all valid .ifdef/.else/.endif constructions:

                    .ifdef  sym$1           ;lookup symbol sym$1
                    .byte   1,2             ;insert bytes if sym$1
                    .endif                  ;is defined or
                                            ;assigned a value

                    .ifdef  sym$2           ;lookup symbol sym$2
                    .else
                    .byte   3,4             ;insert bytes if sym$1
                    .endif                  ;is not defined and
                                            ;not assigned a value

                    .ifdef  sym$3           ;lookup symbol sym$3
                    .byte   12              ;insert this byte if sym$3
                    .else                   ;is defined/valued
                    .byte   13              ;insert this byte if sym$3

            THE ASSEMBLER                                          PAGE 1-37
            GENERAL ASSEMBLER DIRECTIVES

                    .endif                  ;is not defined/valued

            Note  that the default assembler configuration of case sensitive
            means the testing for a defined symbol is also case sensitive.

               All  .if/.else/.endif  directives  are  limited  to a maximum
            nesting of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.32  .ifndef Directive

            Format:

                    .ifndef sym
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the condition test.

               The  range  of true condition will be processed if the symbol
            'sym' is not defined by a .define directive and a variable 'sym'
            has  not been assigned a value else the range of false condition
            will be processed.  The range of true condition is  optional  as
            is  the  .else  directive and the range of false condition.  The
            following are all valid .ifndef/.else/.endif constructions:

                    .ifndef sym$1           ;lookup symbol sym$1
                    .byte   1,2             ;insert bytes if sym$1 is
                    .endif                  ;not defined and
                                            ;not assigned a value

                    .ifndef sym$2           ;lookup symbol sym$2
                    .else
                    .byte   3,4             ;insert bytes if sym$1
                    .endif                  ;is defined or
                                            ;is assigned a value

                    .ifndef sym$3           ;lookup symbol sym$3
                    .byte   12              ;insert this byte if sym$3

            THE ASSEMBLER                                          PAGE 1-38
            GENERAL ASSEMBLER DIRECTIVES

                    .else                   ;is not defined/valued
                    .byte   13              ;insert this byte if sym$3
                    .endif                  ;is defined/valued

            All .if/.else/.endif directives are limited to a maximum nesting
            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.33  .ifb Directive

            Format:

                    .ifb    sym
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  conditional  .ifb  is most useful when used in macro de-
            finitions to determine if the argument is blank.  The  range  of
            true  condition  will be processed if the symbol 'sym' is blank.
            The range of true condition is optional as is the  .else  direc-
            tive  and  the  range of false condition.  The following are all
            valid .ifb/.ifnb/.else/.endif constructions:

                    .ifb    sym$1           ;argument is not blank
                    .byte   1,2             ;insert bytes if argument
                    .endif                  ;is blank

                    .ifb    sym$2           ;argument is not blank
                    .else
                    .byte   3,4             ;insert bytes if argument
                    .endif                  ;is not blank

                    .ifb                    ;argument is blank
                    .byte   12              ;insert this byte if
                    .else                   ;argument is blank
                    .byte   13              ;insert this byte if
                    .endif                  ;argument not blank

            THE ASSEMBLER                                          PAGE 1-39
            GENERAL ASSEMBLER DIRECTIVES

            All .if/.else/.endif directives are limited to a maximum nesting
            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.34  .ifnb Directive

            Format:

                    .ifnb   sym
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  conditional  .ifnb is most useful when used in macro de-
            finitions to determine if the argument is not blank.  The  range
            of  true  condition will be processed if the symbol 'sym' is not
            blank.  The range of true condition is optional as is the  .else
            directive  and  the range of false condition.  The following are
            all valid .ifnb/.else/.endif constructions:

                    .ifnb   sym$1           ;argument is not blank
                    .byte   1,2             ;insert bytes if argument
                    .endif                  ;is not blank

                    .ifnb   sym$2           ;argument is not blank
                    .else
                    .byte   3,4             ;insert bytes if argument
                    .endif                  ;is blank

                    .ifnb                   ;argument is blank
                    .byte   12              ;insert this byte if
                    .else                   ;argument is not blank
                    .byte   13              ;insert this byte if
                    .endif                  ;argument is blank

            All .if/.else/.endif directives are limited to a maximum nesting

            THE ASSEMBLER                                          PAGE 1-40
            GENERAL ASSEMBLER DIRECTIVES

            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.35  .ifidn Directive

            Format:

                    .ifidn  sym$1,sym$2
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  conditional .ifidn is most useful when used in macro de-
            finitions to determine if  the  arguments  are  identical.   The
            range  of true condition will be processed if the symbol 'sym$1'
            is idendical to 'sym$2' (i.e.  the character strings  for  sym$1
            and  sym$2  are  the  same  consistent with the case sensitivity
            flag).  When this if statement occurs inside a  macro  where  an
            argument  substitution  may  be blank then an argument should be
            delimited with the form /symbol/ for each symbol.  The range  of
            true  condition  is  optional  as is the .else directive and the
            range  of  false  condition.   The  following  are   all   valid
            .ifidn/.else/.endif constructions:

                    .ifidn  sym$1,sym$1     ;arguments are the same
                    .byte   1,2             ;insert bytes if arguments
                    .endif                  ;are the sane

                    .ifidn  sym$1,sym$2     ;arguments are not the same
                    .else
                    .byte   3,4             ;insert bytes if arguments
                    .endif                  ;are not the same

                    .ifidn  sym$3,sym$3     ;arguments are the same
                    .byte   12              ;insert this byte if
                    .else                   ;arguments are the same
                    .byte   13              ;insert this byte if
                    .endif                  ;arguments are not the same

            THE ASSEMBLER                                          PAGE 1-41
            GENERAL ASSEMBLER DIRECTIVES

            All .if/.else/.endif directives are limited to a maximum nesting
            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.36  .ifdif Directive

            Format:

                    .ifdif  sym$1,sym$2
                    .                       ;}
                    .                       ;} range of true condition
                    .                       ;}
                    .else
                    .                       ;}
                    .                       ;} range of false condition
                    .                       ;}
                    .endif

               The  conditional  assembly directives allow you to include or
            exclude blocks of source code during the assembly process, based
            on the evaluation of the test condition.

               The  conditional .ifdif is most useful when used in macro de-
            finitions to determine if  the  arguments  are  different.   The
            range  of true condition will be processed if the symbol 'sym$1'
            is different from 'sym$2' (i.e.  the character strings for sym$1
            and  sym$2  are the not the same consistent with the case sensi-
            tivity flag).  When this if  statement  occurs  inside  a  macro
            where  an  argument  substitution  may be blank then an argument
            should be delimited with the form /symbol/ for each symbol.  The
            range  of  true  condition is optional as is the .else directive
            and the range of false condition.  The following are  all  valid
            .ifdif/.else/.endif constructions:

                    .ifdif  sym$1,sym$2     ;arguments are different
                    .byte   1,2             ;insert bytes if arguments
                    .endif                  ;are different

                    .ifdif  sym$1,sym$1     ;arguments are identical
                    .else
                    .byte   3,4             ;insert bytes if arguments
                    .endif                  ;are different

                    .ifdif  sym$1,sym$3     ;arguments are different
                    .byte   12              ;insert this byte if
                    .else                   ;arguments are different

            THE ASSEMBLER                                          PAGE 1-42
            GENERAL ASSEMBLER DIRECTIVES

                    .byte   13              ;insert this byte if
                    .endif                  ;arguments are identical

            All .if/.else/.endif directives are limited to a maximum nesting
            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.37  Alternate .if Directive Forms

               Format:

                    .if     cnd(,)  arg1(, arg2)

               where  the  cnd (followed by an optional comma) may be any of
            the following:

                    -------------------------------------------------------
                     condition              Assemble
                    (complement)    Args    Block if:
                    -------------------------------------------------------
                    eq   ( ne )     expr    equal to zero
                                            (not equal to zero)

                    gt   ( le )     expr    greater than zero
                                            (less than or equal to zero)

                    lt   ( ge )     expr    less than zero
                                            (greater than or equal to zero)

                    def  ( ndef )   symbol  .define'd or user set
                                            (not .define'd or user set)

                    b    ( nb )     macro   argument present
                                    symbol  (argument not present)

                    idn  ( dif )    macro   arguments identical
                                    symbol  (arguments not identical)

                    f    ( t )      -----   only within a .if/.else/.endif
                                            conditional block

                    tf              -----   only within a .if/.else/.endif
                                            conditional block

            All .if/.else/.endif directives are limited to a maximum nesting

            THE ASSEMBLER                                          PAGE 1-43
            GENERAL ASSEMBLER DIRECTIVES

            of 10 levels.

               The  use of a .else directive outside a .if/.endif block will
            generate an (i) error.  Assemblies having unequal .if and .endif
            counts will cause an (i) error.

            1.4.38  Immediate Conditional Assembly Directives

               The  immediate conditional assembly directives allow a single
            line of code to be assembled without  using  a  .if/.else/.endif
            construct.   All  of  the previously described conditionals have
            immediate equivalents.

               Format:

                    .iif            arg(,)          line_to_assemble
                    .iifeq          arg(,)          line_to_assemble
                    .iifne          arg(,)          line_to_assemble
                    .iifgt          arg(,)          line_to_assemble
                    .iifle          arg(,)          line_to_assemble
                    .iifge          arg(,)          line_to_assemble
                    .iiflt          arg(,)          line_to_assemble
                    .iifdef         arg(,)          line_to_assemble
                    .iifndef        arg(,)          line_to_assemble

                    .iifb        (,)arg(,)          line_to_assemble
                    .iifnb       (,)arg(,)          line_to_assemble
                    .iifidn      (,)arg1,arg2(,)    line_to_assemble
                    .iifdif      (,)arg1,arg2(,)    line_to_assemble

                    .iiff                           line_to_assemble
                    .iift                           line_to_assemble
                    .iiftf                          line_to_assemble

            Alternate Format:

                    .iif            arg(,)          line_to_assemble
                    .iif    eq      arg(,)          line_to_assemble
                    .iif    ne      arg(,)          line_to_assemble
                    .iif    gt      arg(,)          line_to_assemble
                    .iif    le      arg(,)          line_to_assemble
                    .iif    ge      arg(,)          line_to_assemble
                    .iif    lt      arg(,)          line_to_assemble
                    .iif    def     arg(,)          line_to_assemble
                    .iif    ndef    arg(,)          line_to_assemble

                    .iif    b    (,)arg(,)          line_to_assemble
                    .iif    nb   (,)arg(,)          line_to_assemble
                    .iif    idn  (,)arg1,arg2(,)    line_to_assemble

            THE ASSEMBLER                                          PAGE 1-44
            GENERAL ASSEMBLER DIRECTIVES

                    .iif    dif  (,)arg1,arg2(,)    line_to_assemble

                    .iiff                           line_to_assemble
                    .iift                           line_to_assemble
                    .iiftf                          line_to_assemble

            The (,) indicates an optional comma.

               The  .iif  types b, n, idn, and dif require the commas if the
            argument(s) may be blank.  These commas may be  removed  if  the
            arguments are delimited with the form ^/symbol/ for each symbol.

               The   immediate   conditional  directives  donot  change  the
            .if/.else/.endif nesting level.

            1.4.39  .include Directive

            Format:

                    .include         /string/               or

                    .include        ^/string/

            where:  string  represents  a string that is the file specifica-
                            tion of an ASxxxx source file.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting characters do not match, the .include
                            directive will give the (q) error.

               The .include directive is used to insert a source file within
            the source file currently being assembled.  When this  directive
            is encountered, an implicit .page directive is issued.  When the
            end of the specified source file is reached, an  implicit  .page
            directive is issued and input continues from the previous source
            file.  The maximum nesting level of source files specified by  a
            .include directive is five.

               The  total  number  of separately specified .include files is
            unlimited as each .include file is opened and then closed during
            each pass made by the assembler.

               The  default  directory  path,  if none is specified, for any
            .include file is the directory path of the  current  file.   For
            example:    if   the  current  source  file,  D:\proj\file1.asm,

            THE ASSEMBLER                                          PAGE 1-45
            GENERAL ASSEMBLER DIRECTIVES

            includes  a  file  specified  as  "include1"   then   the   file
            D:\proj\include1.asm is opened.

            1.4.40  .define and .undefine Directives

            Format:

                    .define        keyword  /string/        or

                    .define        keyword ^/string/

                    .undefine      keyword

            where:  keyword is  the  substitutable  string  which must start
                            with a letter and may contain any combination of
                            digits and letters.

            where:  string  represents  a string that is substituted for the
                            keyword.  The string may contain any sequence of
                            characters including white space.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters do not match, the .define
                            directive will give the (q) error.

               The  .define  directive specifies a user defined string which
            is substituted for the keyword.  The substitution string may it-
            self  contain other keywords that are substitutable.  The assem-
            bler resumes the parse of the line at the point the keyword  was
            found.  Care must be excersized to avoid any circular references
            within .define directives, otherwise the assembler may  enter  a
            'recursion runaway' resulting in an 's' error.

               The  .undefine  directive removes the keyword as a substitut-
            able string.  No error is returned if the keyword  was  not  de-
            fined.

            THE ASSEMBLER                                          PAGE 1-46
            GENERAL ASSEMBLER DIRECTIVES

            1.4.41  .setdp Directive

            Format:

                    .setdp [base [,area]]

            The set direct page directive has a common format in all the as-
            semblers supporting a paged mode.  The .setdp directive is  used
            to  inform  the  assembler of the current direct page region and
            the offset address within the selected area.  The normal invoca-
            tion methods are:

                    .area   DIRECT  (PAG)
                    .setdp

                    or

                    .setdp  0,DIRECT

            for  all  the  68xx microprocessors (the 6804 has only the paged
            ram area).  The commands specify that the direct page is in area
            DIRECT and its offset address is 0 (the only valid value for all
            but the 6809 microprocessor).  Be sure to place the DIRECT  area
            at address 0 during linking.  When the base address and area are
            not specified, then zero and the current area are the  defaults.
            If  a  .setdp directive is not issued the assembler defaults the
            direct page to the area "_CODE" at offset 0.

               The  assembler  verifies  that  any  local variable used in a
            direct variable reference is located in this area.  Local  vari-
            able  and  constant value direct access addresses are checked to
            be within the address range from 0 to 255.

               External direct references are assumed by the assembler to be
            in the correct area and have valid  offsets.   The  linker  will
            check all direct page relocations to verify that they are within
            the correct area.

               The  6809  microprocessor  allows the selection of the direct
            page to be on any 256 byte boundary by loading  the  appropriate
            value  into the dp register.  Typically one would like to select
            the page boundary at link time, one method follows:

            THE ASSEMBLER                                          PAGE 1-47
            GENERAL ASSEMBLER DIRECTIVES

                    .area   DIRECT  (PAG)   ; define the direct page
                    .setdp
                    .
                    .
                    .
                    .area   PROGRAM
                    .
                    ldd     #DIRECT         ; load the direct page register
                    tfr     a,dp            ; for access to the direct page

            At  link  time specify the base and global equates to locate the
            direct page:

                    -b DIRECT = 0x1000
                    -g DIRECT = 0x1000

            Both  the  area address and offset value must be specified (area
            and variable names are independent).   The  linker  will  verify
            that  the  relocated  direct page accesses are within the direct
            page.

            The  preceeding  sequence  could  be repeated for multiple paged
            areas, however an alternate method is to define a non-paged area
            and use the .setdp directive to specify the offset value:

                    .area   DIRECT          ; define non-paged area
                    .
                    .
                    .
                    .area   PROGRAM
                    .
                    .setdp  0,DIRECT        ; direct page area
                    ldd     #DIRECT         ; load the direct page register
                    tfr     a,dp            ; for access to the direct page
                    .
                    .
                    .setdp  0x100,DIRECT    ; direct page area
                    ldd     #DIRECT+0x100   ; load the direct page register
                    tfr     a,dp            ; for access to the direct page

            The  linker  will  verify that subsequent direct page references
            are in the specified area and offset address range.  It  is  the
            programmers responsibility to load the dp register with the cor-
            rect page segment  corresponding  to  the  .setdp  base  address
            specified.

               For  those  cases  where a single piece of code must access a
            defined data structure within a direct page and there  are  many
            pages,  define  a  dumby  direct page linked at address 0.  This
            dumby page is used only to define  the  variable  labels.   Then
            load  the dp register with the real base address but donot use a
            .setdp  directive.   This  method  is  equivalent   to   indexed

            THE ASSEMBLER                                          PAGE 1-48
            GENERAL ASSEMBLER DIRECTIVES

            addressing,  where the dp register is the index register and the
            direct addressing is the offset.

            1.4.42  .16bit, .24bit, and .32bit Directives

            Format:

                    .16bit          ;specify 16-bit addressing
                    .24bit          ;specify 24-bit addressing
                    .32bit          ;specify 32-bit addressing

               The  .16bit, .24bit, and .32bit directives are special direc-
            tives for assembler configuration when default  values  are  not
            used.

            1.4.43  .msb Directive

            Format:

                    .msb    n

               The  .msb  directive is only available in selected assemblers
            which support 24 or 32-bit addressing.

               The  assembler operator '>' selects the upper byte (MSB) when
            included in an assembler  instruction.   The  default  assembler
            mode  is  to  select bits <15:8> as the MSB.  The .msb directive
            allows the programmer to specify a particular byte as the  'MSB'
            when the address space is larger than 16-bits.

               The assembler directive   .msb n  configures the assembler to
            select a particular byte as MSB.  Given a 32-bit address of MNmn
            (M(3)  is  <31:24>, N(2) is <23:16>, m(1) is <15:8>, and n(0) is
            <7:0>) the following examples show how to  select  a  particular
            address byte:

                    .msb 1          ;select byte 1 of address
                                    ;<M(3):N(2):m(1):n(0)>
                    LD A,>MNmn      ;byte m <15:8> ==>> A
                    ...

                    .msb 2          ;select byte 2 of address
                                    ;<M(3):N(2):m(1):n(0)>
                    LD A,>MNmn      ;byte N <23:16> ==>> A
                    ...

                    .msb 3          ;select byte 3 of address
                                    ;<M(3):N(2):m(1):n(0)>

            THE ASSEMBLER                                          PAGE 1-49
            GENERAL ASSEMBLER DIRECTIVES

                    LD A,>MNmn      ;byte M <31:24> ==>> A
                    ...

            1.4.44  .lohi and .hilo Directives

            Format:

                    .lohi           ;specify LSB first output
                    .hilo           ;specify MSB first output

               The .lohi and .hilo directives are special directives for as-
            sembler output configuration.  These  directives  are  currently
            only enabled in assembler 'ascheck'.

               An  'm' error will be generated if the .lohi and .hilo direc-
            tives are both used within the same assembly source file.

            1.4.45  .end Directive

            Format:

                    .end

                    .end    exp

            where:  exp     represents  any expression, including constants,
                            symbols, or labels.

               The  .end  directive is used to specify a code entry point to
            be included in the linker output file.  Review  the  I86  and  S
            record formats described in the linker section for details.

               The .end directive without an expression is ignored.

            THE ASSEMBLER                                          PAGE 1-50
            GENERAL ASSEMBLER DIRECTIVES

            1.5  INVOKING ASXXXX

               Starting  an  ASxxxx assembler without any arguments provides
            the following option list and then exits:

            Usage: [-Options] file
            Usage: [-Options] outfile file1 [file2 file3 ...]
              -d   Decimal listing
              -q   Octal   listing
              -x   Hex     listing (default)
              -g   Undefined symbols made global
              -a   All user symbols made global
              -b   Display .define substitutions in listing
              -bb  and display without .define substitutions
              -c   Disable instruction cycle count in listing
              -j   Enable NoICE Debug Symbols
              -y   Enable SDCC  Debug Symbols
              -l   Create list   output (out)file[.lst]
              -o   Create object output (out)file[.rel]
              -s   Create symbol output (out)file[.sym]
              -p   Disable listing pagination
              -u   Disable .list/.nlist processing
              -w   Wide listing format for symbol table
              -z   Disable case sensitivity for symbols
              -f   Flag relocatable references by  `   in listing file
              -ff  Flag relocatable references by mode in listing file

               The ASxxxx assemblers are command line oriented.  Most sytems
            require the option(s) and file(s) arguments to follow the ASxxxx
            assembler name:

              as6809 -[Options] file

              as6809 [-Options] outfile file1 [file2 ...]

            Some  systems  may  request the arguments after the assembler is
            started at a system specific prompt:

              as6809
              argv: -[Options] file

              as6809
              argv: [-Options] outfile file1 [file2 ...]

            The ASxxxx options in some more detail:

                    -d      decimal listing

            THE ASSEMBLER                                          PAGE 1-51
            INVOKING ASXXXX

                    -q      octal   listing
                    -x      hex     listing (default)

                            The listing radix affects the
                            .lst, .rel, and .sym files.

                    -g      undefined symbols made global

                            Unresolved (external) variables
                            and symbols are flagged as global.

                    -a      all user symbols made global

                            All defined (not local or external)
                            variables and symbols are flagged
                            as global.

                    -b      display .define substitutions in listing

                            If a .define substitution has been applied
                            to an assembler source line the source
                            line is printed with the substitution.

                    -bb     and display without .define substitutions

                            If a .define substitution has been applied
                            to an assembler source line the source
                            line is first printed without substitution
                            followed by the line with the substitution.

                    -c      Disable instruction cycle count in listing

                            This option overrides the listing option
                            'cyc' in the .list and .nlist directives.
                            Instruction cycle counts cannot be enabled
                            if the -c option is specified.

                    -j      enable NOICE debug symbols
                    -y      enable SDCC debug symbols

                    -l      create list   output (out)file.lst

                            If -s (symbol table output) is not
                            specified the symbol table is included
                            at the end of the listing file.

                    -o      create object output (out)file.rel
                    -s      create symbol output (out)file.sym

                    -p      disable listing pagination

                            This option inhibits the generation

            THE ASSEMBLER                                          PAGE 1-52
            INVOKING ASXXXX

                            of a form-feed character and its
                            associated page header in the
                            assembler listing.

                    -u      disable .list/.nlist processing

                            This option disables all .list and
                            .nlist directives. The listing mode
                            is .list with the options err, loc,
                            bin, eqt, cyc, lin, src, pag, lst,
                            and md. The options cyc and pag are
                            overridden by the -c and -p command
                            line options.

                    -w      wide listing format for symbol table

                    -z      disable case sensitivity for symbols

                    -f      by  `   in the listing file
                    -ff     by mode in the listing file

                            Relocatable modess are flagged by byte
                            position (LSB, Byte 2, Byte 3, MSB)
                            *nMN    paged,
                            uvUV    unsigned,
                            rsRS    signed,
                            pqPQ    program counter relative.

               The file name for the .lst, .rel, and .sym files is the first
            file name specified in the command line.  All output  files  are
            ascii  text  files which may be edited, copied, etc.  The output
            files are the concatenation of all the input files, if files are
            to  be  assembled  independently  invoke  the assembler for each
            file.

               The  .rel  file contains a radix directive so that the linker
            will use the proper conversion for this file.  Linked files  may
            have different radices.

            1.6  ERRORS

               The  ASxxxx assemblers provide limited diagnostic error codes
            during the assembly process, these errors will be noted  in  the
            listing file and printed on the stderr device.

               The assembler reports the errors on the stderr device as

                    ?ASxxxx-Error-<*> in line nnn of filename

            where  * is the error code, nnn is the line number, and filename

            THE ASSEMBLER                                          PAGE 1-53
            ERRORS

            is the source/include file.

               The errors are:

                  (.)   This  error  is caused by an absolute direct assign-
                        ment of the current location counter
                              . = expression (incorrect)
                        rather than the correct
                              . = . + expression

                  (a)   Indicates  a machine specific addressing or address-
                        ing mode error.

                  (b)   Indicates a direct page boundary error.

                  (d)   Indicates a direct page addressing error.

                  (e)   Caused by a .error or .assume directive.

                  (i)   Caused  by  an  .include file error or an .if/.endif
                        mismatch.

                  (m)   Multiple  definitions  of  the  same label, multiple
                        .module directives, multiple conflicting  attributes
                        in  an  .area or .bank directive or the use of .hilo
                        and lohi within the same assembly.

                  (n)   An  .mexit,  .endm,  or .narg directive outside of a
                        macro, repeat block or indefinite repeat block.

                  (o)   Directive  or  mnemonic error or the use of the .org
                        directive in a relocatable area.

                  (p)   Phase error:  label location changing between passes
                        2 and 3.  Normally caused by having  more  than  one
                        level of forward referencing.

                  (q)   Questionable syntax:  missing or improper operators,
                        terminators, or delimiters.

                  (r)   Relocation  error:   logic  operation attempted on a
                        relocatable term, addition of two relocatable terms,
                        subtraction  of two relocatable terms not within the
                        same programming area or external symbols.

                  (s)   String Substitution / recursion error.

                  (u)   Undefined symbol encountered during assembly.

                  (z)   Divide by 0 or Modulus by 0 error:  result is 0.

            THE ASSEMBLER                                          PAGE 1-54
            LISTING FILE

            1.7  LISTING FILE

               The  (-l) option produces an ascii output listing file.  Each
            page of output contains a five line header:

                 1.  The ASxxxx program name and page number

                 2.  Assembler Radix and Address Bits

                 3.  Title from a .title directive (if any)

                 4.  Subtitle from a .sbttl directive (if any)

                 5.  Blank line

            Each succeeding line contains six fields:

                 1.  Error field (first two characters of line)

                 2.  Current location counter

                 3.  Generated code in byte format

                 4.  Opcode cycles count

                 5.  Source text line number

                 6.  Source text

               The error field may contain upto 2 error flags indicating any
            errors encountered while assembling this line of source code.

               The  current  location  counter  field  displays  the 16-bit,
            24-bit, or 32-bit program position.  This field will be  in  the
            selected radix.

               The generated code follows the program location.  The listing
            radix determines the number of bytes that will be  displayed  in
            this field.  Hexidecimal listing allows six bytes of data within
            the field, decimal and octal allow four bytes within the  field.
            If more than one field of data is generated from the assembly of
            a single line of source code, then the data field is repeated on
            successive lines.

               The  opcode cycles count is printed within the delimiters [ ]
            on the line with the source text.  This reduces  the  number  of

            THE ASSEMBLER                                          PAGE 1-55
            LISTING FILE

            generated code bytes displayed on the line with the source list-
            ing by one.  (The -c option disables all opcode cycle listing.)

               The source text line number is printed in decimal and is fol-
            lowed by the source text.  A Source line with a .page  directive
            is never listed.  (The -u option overrides this behavior.)

               Two  additional options are available for printing the source
            line text.  If the -b option is specified then the listed source
            line  contains all the .define substitutions.  If the -bb option
            is specified then the original source line is printed before the
            source line with substitutions.

               Two  data  field  options  are  available to flag those bytes
            which will be relocated by the linker.   If  the  -f  option  is
            specified  then  each  byte to be relocated will be preceeded by
            the '`' character.  If the -ff option  is  specified  then  each
            byte  to  be relocated will be preceeded by one of the following
            characters:

                 1.  *   paged relocation

                 2.  u   low  byte of unsigned word or unsigned byte

                 3.  v   high byte of unsigned word

                 4.  p   PCR low  byte of word relocation or PCR byte

                 5.  q   PCR high byte of word relocation

                 6.  r   low  byte relocation or byte relocation

                 7.  s   high byte relocation

               Assemblers  which  use 24-bit or 32-bit addressing use an ex-
            tended flagging mode:

                 1.  *   paged relocation

                 2.  u   1st  byte of unsigned value

                 3.  v   2nd  byte of unsigned value

                 4.  U   3rd  byte of unsigned value

                 5.  V   4th  byte of unsigned value

                 6.  p   PCR 1st  byte of relocation value or PCR byte

                 7.  q   PCR 2nd  byte of relocation value

            THE ASSEMBLER                                          PAGE 1-56
            LISTING FILE

                 8.  P   PCR 3rd  byte of relocation value

                 9.  Q   PCR 4th  byte of relocation value

                10.  r   1st  byte of relocation value or byte relocation

                11.  s   2nd  byte of relocation value

                12.  R   3rd  byte of relocation value

                13.  S   4th  byte of relocation value

            1.8  SYMBOL TABLE FILE

               The symbol table has two parts:

                 1.  The alphabetically sorted list of symbols and/or labels
                     defined or referenced in the source program.

                 2.  A  list of the program areas defined during assembly of
                     the source program.

               The sorted list of symbols and/or labels contains the follow-
            ing information:

                 1.  Program  area  number (none if absolute value or exter-
                     nal)

                 2.  The symbol or label

                 3.  Directly assigned symbol is denoted with an (=) sign

                 4.  The  value of a symbol, location of a label relative to
                     the program area base address (=0), or a ****  indicat-
                     ing the symbol or label is undefined.

                 5.  The       characters:       G - global,      L - local,
                     R - relocatable, and X - external.

               The list of program areas provides the correspondence between
            the program area numbers and the defined program areas, the size
            of the program areas, and the area flags (attributes).

            THE ASSEMBLER                                          PAGE 1-57
            OBJECT FILE

            1.9  OBJECT FILE

               The  object  file is an ascii file containing the information
            needed by the linker to bind multiple object modules into a com-
            plete  loadable  memory  image.   The object module contains the
            following designators:

                    [XDQ][HL][234]
                            X       Hexidecimal radix
                            D       Decimal radix
                            Q       Octal radix

                            H       Most significant byte first
                            L       Least significant byte first

                            2       16-Bit Addressing
                            3       24-Bit Addressing
                            4       32-Bit Addressing

                    H       Header
                    M       Module
                    G       Merge Mode
                    B       Bank
                    A       Area
                    S       Symbol
                    T       Object code
                    R       Relocation information
                    P       Paging information

               Refer to the linker for a detailed description of each of the
            designators and the format of the information contained  in  the
            object file.

                                        CHAPTER 2

                                   THE MACRO PROCESSOR

            2.1  DEFINING MACROS

               By  using macros a programmer can use a single line to insert
            a sequence of lines into a source program.

               A  macro  definition is headed by a .macro directive followed
            by the source lines.  The source lines  may  optionally  contain
            dummy arguments.  If such arguments are used, each one is listed
            in the .macro directive.

               A  macro call is the statement used by the programmer to call
            the macro source program.  It consists of the  macro  name  fol-
            lowed  by  the  real arguments needed to replace the dummy argu-
            ments used in the macro.

               Macro  expansion  is  the insertion of the macro source lines
            into the main  program.   Included  in  this  insertion  is  the
            replacement of the dummy arguments by the real arguments.

               Macro  directives provide a means to manipulate the macro ex-
            pansions.  Only one directive is allowed per source line.   Each
            directive  may  have  a  blank  operand  field  or  one  or more
            operands.  Legal  operands  differ  with  each  directive.   The
            macros  and  their  associated  directives  are detailed in this
            chapter.

               Macro  directives  can replace any machine dependent mnemonic
            associated with a specific assembler.  However, the basic assem-
            bler directives cannot be replaced with a macro.

            THE MACRO PROCESSOR                                     PAGE 2-2
            DEFINING MACROS

            2.1.1  .macro Directive

            Format:

            [label:]        .macro  name, dummy argument list

            where:  label   represents an optional statement label.

                    name    represents the user-assigned symbolic
                            name of the macro.  This name  may be
                            any legal symbol and may be used as a
                            label elsewhere in the program.  The
                            macro name is not case sensitive,
                            name, NAME, or nAmE all refer to the
                            same macro.

                    ,       represents a legal macro separator
                            (comma, space, and/or tab).

                    dummy   represents a number of legal symbols
                   argument that may appear anywhere in the body of
                    list    the macro definition,  even as a label.
                            These dummy symbols can be used elsewhere
                            in the program with no conflict of
                            definition.  Multiple dummy arguments
                            specified in this directive may be
                            separated by any legal separator.  The
                            detection of a duplicate or an illegal
                            symbol in a dummy argument list
                            terminates the scan and causes a 'q'
                            error to be generated.

            A  comment may follow the dummy argument list in a .macro direc-
            tive, as shown below:

                    .macro  abs     a,b     ;Defines macro abs

            The  first  statement  of  a  macro  definition must be a .macro
            directive.  Defining a macro with the same name as  an  existing
            macro will generate an 'm' error.  The .mdelete directive should
            be used to delete the previous macro definition before  redefin-
            ing a macro.

            THE MACRO PROCESSOR                                     PAGE 2-3
            DEFINING MACROS

            2.1.2  .endm Directive

            Format:

                    .endm

            The .endm directive should not have a label.  Because the direc-
            tives .irp, .irpc, and .rept may repeat more than once the label
            will  be  defined multiple times resulting in 'm' and/or 'p' er-
            rors.

               The  .endm  directive  may be followed by a comment field, as
            shown below:

                    .endm           ;end of macro

               A  comment  may  follow  the  dummy argument list in a .macro
            directive, as shown below:

                    .macro  typemsg message ;Type a message.
                    jsr     typemsg
                    .word   message
                    .endm                   ;End of typemsg

            The  final  statement  of every macro definition must be a .endm
            directive.  The .endm directive is also used to terminate  inde-
            finite  repeat  blocks and repeat blocks.  A .endm directive en-
            countered outside a macro definition  is  flagged  with  an  'n'
            error.

            2.1.3  .mexit Directive

            Format:

                    .mexit

            The  .mexit directive may be used to terminate a macro expansion
            before the end of the macro is encountered.  This  directive  is
            also  legal  within  repeat blocks.  It is most useful in nested
            macros.  The .mexit directive terminates the  current  macro  as
            though a .endm directive had been encountered.  Using the .mexit
            directive bypasses the complexities of nested conditional direc-
            tives  and  alternate  assembly paths, as shown in the following
            example:

            THE MACRO PROCESSOR                                     PAGE 2-4
            DEFINING MACROS

                    .macro  altr    N,A,B
                      .
                      .
                      .
                    .if eq,N        ;Start conditional Block
                      .
                      .
                      .
                    .mexit          ;Terminate macro expansion
                    .endif          ;End of conditional block
                      .
                      .
                      .
                    .endm           ;Normal end of macro

            In  an  assembly  where  the  symbol  N is replaced by zero, the
            .mexit directive would assemble the conditional block  and  ter-
            minate  the  macro  expansion.   When macros ar nested, a .mexit
            directive causes an exit to the next higher level of  macro  ex-
            pansion.  A .mexit directive encountered outside a macro defini-
            tion is flagged with an 'n' error.

            2.2  CALLING MACROS

            Format:

                    [label:]  name  real arguments

            where:  label   represents an optional statement label.

                    name    represents the name of the macro, as
                            specified in the macro definition.

                    real    represent symbolic arguments which
                 arguments  replace the dummy arguments listed
                            in the .macro definition.  When
                            multiple arguments occur, they are
                            separated by any legal separator.
                            Arguments to the macro call are
                            treated as character strings, their
                            usage is determined by the macro
                            definition.

            A  macro  definition  must be established by means of the .macro
            directive before the macro can be called and expanded within the
            source program.

               When a macro name is the same as a user label, the appearance
            of the symbol in the operator field designates the symbol  as  a

            THE MACRO PROCESSOR                                     PAGE 2-5
            CALLING MACROS

            macro  call;   the appearance of the symbol in the operand field
            designates it as a label, as shown below:

            LESS:   mov     @r0,r1          ;LESS is a label
                     .
                     .
                     .
                    bra     LESS            ;LESS is considered a label
                     .
                     .
                     .
                    LESS    sym1,sym2       ;LESS is a macro call

            2.3  ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

               Multiple arguments within a macro must be separated by one of
            the legal separating characters (comma, space, and/or tab).

               Macro  definition  arguments (dummy) and macro call arguments
            (real) maintain a strict positional relationship.  That is,  the
            first  real  argument in a macro call corresponds with the first
            dummy argument in the macro definition.

               For  example,  the  following  macro definition and its asso-
            ciated macro call contain multiple arguments:

                    .macro  new     a,b,c
                      .
                      .
                      .

                    new     phi,sig,^/C1,C2/

            Arguments which themselves contain separating characters must be
            enclosed  within  the  delimiter  construct  ^/   /  where   the
            character  '/'  may be any character not in the argument string.
            For example, the macro call:

                    new     ^/exg    x,y/,#44,ij

            causes the entire expression

                    exg    x,y

            to  replace all occurrances of the symbol a in the macro defini-
            tion.  Real arguments with a macro call  are  considered  to  be
            character  strings  and  are  treated  as a single entity during
            macro expansion.

            THE MACRO PROCESSOR                                     PAGE 2-6
            ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

               The  up-arrow  (^)  construction also allows another up-arrow
            costruction to be passed as part of  the  argument.   This  con-
            struction,  for example, could have been used in the above macro
            call, as follows:

                    new     ^!^/exg    x,y/!,#44,ij

            causing the entire string ^/exg    x,y/ to be passed as an argu-
            ment.

            2.3.1  Macro Nesting

               Macro  nesting  occurs  where  the expansion of one macro in-
            cludes a call to another macro.  The depth of nesting  is  arbi-
            trarily limited to 20.

               To  pass  an argument containing legal argument delimiters to
            nested macros, enclose the  argument  in  the  macro  definition
            within  an up-arrow construction, as shown in the coding example
            below.  This extra set of delimiters for each level  of  nesting
            is required in the macro definition, not the in the macro call.

                    .macro  level1  dum1,dum2
                    level2  ^/dum1/
                    level2  ^/dum2/
                    .endm

                    .macro  level2  dum3
                    dum3
                    add     #10,z
                    push    z
                    .endm

            A call to the level1 macro, as shown below, for example:

                    level1  ^/leaz    0,x/,^/tfr     x,z/

            causes the following macro expansion to occur:

                    leaz    0,x
                    add     #10,z
                    push    z
                    tfr     x,z
                    add     #10,z
                    push    z

            When  macro  definitions are nested, the inner definition cannot
            be called until the outer macro has been  called  and  expanded.
            For example, in the following code:

            THE MACRO PROCESSOR                                     PAGE 2-7
            ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

                    .macro  lv1     a,b
                      .
                      .
                      .
                    .macro  lv2     c
                      .
                      .
                      .
                    .endm
                    .endm

            the  lv2 macro cannot be called and expanded until the lv1 macro
            has been expanded.  Likewise, any macro defined within  the  lv2
            macro  definition  cannot  be  called and expanded until lv2 has
            also been expanded.

            2.3.2  Special Characters in Macro Arguments

               If  an  argument  does not contain spaces, tabs, or commas it
            may include special  characters  without  enclosing  them  in  a
            delimited construction.  For example:

                    .macro  push    arg
                    mov     arg,-(sp)
                    .endm

                    push    x+3(%2)

            causes the following code to be generated:

                    mov     x+3(%2),-(sp)

            2.3.3  Passing Numerical Arguments as Symbols

               If the unary operator backslash (\) precedes an argument, the
            macro treats the argument as a numeric value in the current pro-
            gram  radix.   The  ascii characters representing this value are
            inserted in the macro expansion, and their function  is  defined
            in  the context of the resulting code, as shown in the following
            example:

            THE MACRO PROCESSOR                                     PAGE 2-8
            ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

                    .macro  inc     a,b
                    con     a,\b
                    b = b + 1
                    .endm

                    .macro  con     a,b
            a'b:    .word   4
                    .endm

                    ...

                    c = 0           ;Initialize

                    inc     x,c

            The above macro call (inc) would thus expand to:

                    x0:     .word   4

            In  this  expanded  code,  the  lable x0:  results from the con-
            catenation  of  two  real  arguments.   The  single  quote   (')
            character  in  the  label a'b:  concatenates the real argument x
            and 0 as they are passed during  the  expansion  of  the  macro.
            This type of argument construction is descibed in more detail in
            a following section.

               A  subsequent  call to the same macro would generate the fol-
            lowing code:

                    x1:     .word   4

            and  so  on,  for  later  calls.   The two macro definitions are
            necessary because the symbol associated with the dummy  argument
            b (that is, symbol c) cannot be updated in the con macro defini-
            tion, because the character 0 has replaced  c  in  the  argument
            string  (inc  x,c).   In  the  con  macro definition, the number
            passed is treated as a string argument.  (Where the value of the
            real  argument  is 0, only a single 0 character is passed to the
            macro expansion.

            THE MACRO PROCESSOR                                     PAGE 2-9
            ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

            2.3.4  Number of Arguments in Macro Calls

               A  macro  can  be defined with or without arguments.  If more
            arguments appear in the macro call than in the macro definition,
            a  'q'  error  is  generated.   If fewer arguments appear in the
            macro call than in the macro definition, missing  arguments  are
            assumed to be null values.  The conditional directives .if b and
            .if nb can be used within the macro to detect missing arguments.
            The number of arguments can be determined using the .narg direc-
            tive.

            2.3.5  Creating Local Symbols Automatically

               A  label is often required in an expanded macro.  In the con-
            ventional macro facilituies thus far described, a label must  be
            explicitly  specified  as an argument with each macro call.  The
            user must be careful in issuing subsequent  calls  to  the  same
            macro  in  order  avoid duplicating labels.  This concern can be
            eliminated through a feature of the ASxxxx macro  facility  that
            creates a unique symbol where a label is required in an expanded
            macro.

               ASxxxx  allows temporary symbols of the form n$, where n is a
            decimal integer.  Automatically created symbols are  created  in
            numerical order beginning at 10000$.

               The  automatic generation of local symbols is invoked on each
            call of a macro whose definition contains a dummy argument  pre-
            ceded  by the question mark (?) character, as shown in the macro
            definition below:

                    .macro  beta    a,?b    ;dummy argument b with ?
                    tst     a
                    beq     b
                    add     #5,a
            b:
                    .endm

               A  local symbol is created automatically only when a real ar-
            gument of the macro call is either null or missing, as shown  in
            Example 1 below.  If the real argument is specified in the macro
            call, however, generation of the local symbol is  inhibited  and
            normal argument replacement occurs, as shown in Example 2 below.
            (Examples 1 and 2 are both expansions of the beta macro  defined
            above.)

            THE MACRO PROCESSOR                                    PAGE 2-10
            ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

            Example 1:  Create a Local Symbol for the Missing Argument

                    beta    flag    ;Second argument is missing.
                    tst     flag
                    beq     10000$  ;Local symbol is created.
                    add     #5,flag
            10000$:

            Example 2:  Do Not Create a Local Symbol

                    beta    r3,xyz
                    tst     r3
                    beq     xyz
                    add     #5,r3
            xyz:

               Automatically created local symbols resulting from the expan-
            sion of a macro, as described above, do not  establish  a  local
            symbol block in their own right.

               When  a  macro  has several arguments earmarked for automatic
            local symbol generation, substituting a specific label  for  one
            such  argument  risks  assembly errors because the arguments are
            constructed at the point of macro invocation.  Therefor, the ap-
            pearance of a label in the macro expansion will create a new lo-
            cal symbol block.  The new local symbol block could leave  local
            symbol references in the previous block and their symbol defini-
            tions in the new one, causing error codes in the assembly  list-
            ing.   Furthermore  a  later  macro expansion that creates local
            symbols in the new block may duplicate one  of  the  symbols  in
            question,  causing  an additional error code 'p' in the assembly
            listing.

            2.3.6  Concatenation of Macro Arguments

               The  apostrophe  or  single quote character (') operates as a
            legal delimiting character in macro definitions.  A single quote
            that precedes and/or follows a dummy argument in a macro defini-
            tion is removed, and the substitution of the real  argument  oc-
            curs at that point.  For example, in the following statements:

                    .macro  def     A,B,C
            A'B:    asciz   "C"
                    .byte   ''A,''B
                    .endm

            when the macro def is called through the statement:

            THE MACRO PROCESSOR                                    PAGE 2-11
            ARGUMENTS IN MACRO DEFINITIONS AND MACRO CALLS

                    def     x,y,^/V05.00/

            it is expanded, as follows:

            xy:     asciz   "V05.00"
                    .byte   'x,'y

            In  expanding  the  first  line, the scan for the first argument
            terminates upon finding  the  first  apostrophe  (')  character.
            Since  A is a dummy argument, the apostrphe (') is removed.  The
            scan then resumes with B;  B is also noted as another dummy  ar-
            gument.   The  two  real  arguments x and y are then concated to
            form the label xy:.  The third dummy argument is  noted  in  the
            operand field of the .asciz directive, causing the real argument
            V05.00 to be substituted in this field.

               When  evaluating  the arguments of the .byte directive during
            expansion of the second line, the scan  begins  with  the  first
            apostrophe (') character.  Since it is neither preceded nor fol-
            lowed by a dummy argument, this apostrophe remains in the  macro
            expansion.   The  scan  then  encounters  the second apostrophe,
            which is followed by a dummy argument and is therefor discarded.
            The scan of argument A is terminated upon encountering the comma
            (,).  The third apostrophe is neither preceded nor followed by a
            dummy  argument  and  again remains in the macro expansion.  The
            fourth (and last) apostrophe is followed by another dummy  argu-
            ment and is likewise discarded.  (Four apostrophe (') characters
            were necessary in the macro definition  to  generate  two  apos-
            trophe (') characters in the macro expansion.)

            2.4  MACRO ATTRIBUTE DIRECTIVES

               The  ASxxxx  assemblers  have  four directives that allow the
            user to determine certain attributes of macro arguments:  .narg,
            .nchr,  .ntyp,  and  .nval.  The use of these directives permits
            selective modifications of a macro expansion, depending  on  the
            nature  of  the  arguments  being  passed.  These directives are
            described below.

            THE MACRO PROCESSOR                                    PAGE 2-12
            MACRO ATTRIBUTE DIRECTIVES

            2.4.1  .narg Directive

            Format:

            [label:]        .narg   symbol

            where:  label   represents an optional statement label.

                    symbol  represents any legal symbol. This symbol
                            is equated to the number of arguments in
                            the macro call currently being expanded.
                            If a symbol is not specified, the .narg
                            directive is flagged with a 'q' error.

            The .narg directive is used to determine the number of arguments
            in the macro call currently being expanded.   Hence,  the  .narg
            directive  can appear only within a macro definition;  if it ap-
            pears elsewhere, an 'n' error is generated.

               The  argument  count  includes null arguments as shown in the
            following:

                    .macro  pack    A,B,C
                    .narg   cnt
                      .
                      .
                      .
                    .endm

                    pack    arg1,,arg3
                    pack    arg1

            When  the  first macro pack is invoked .narg will assign a value
            of three (3) to the number of arguments cnt, which includes  the
            empty  argument.  The second invocation of macro pack has only a
            single argument specified and .narg will assign a value  of  one
            (1) to cnt.

            THE MACRO PROCESSOR                                    PAGE 2-13
            MACRO ATTRIBUTE DIRECTIVES

            2.4.2  .nchr Directive

            Format:

            [label:]        .nchr   symbol,string

            where:  label   represents an optional statement label.

                    symbol  represents any legal symbol. This symbol
                            is equated to the number of characters in
                            the string of the macro call currently
                            being expanded.  If a symbol is not
                            specified, the .nchr  directive is
                            flagged with a 'q' error.

                    ,       represents any legal separator (comma,
                            space, and/or tab).

                    string  represents a string of printable 7-bit
                            ascii characters.  If the character
                            string contains a legal separator
                            (comma, space and/or tab) the whole
                            string must be delimited using the
                            up-arrow (^) construct ^/    /.
                            If the delimiting characters do not
                            match or if the ending delimiter
                            cannot be detected because of a
                            syntactical error in the character
                            string, the .nchr directive reports
                            a 'q' error.

            The .nchr directive, which can appear anywhere in an ASxxxx pro-
            gram, is used to determine the number of characters in a  speci-
            fied  character string.  This directive is useful in calculating
            the length of macro arguments.

            THE MACRO PROCESSOR                                    PAGE 2-14
            MACRO ATTRIBUTE DIRECTIVES

            2.4.3  .ntyp Directive

            Format:

            [label:]        .ntyp   symbol,arg

            where:  label   represents an optional statement label.

                    symbol  represents any legal symbol. The symbol
                            is made absolute and equated to 0 if
                            arg is an absolute value or a non
                            relocatable symbol.  The symbol is made
                            absolute and equated to 1 if arg is a
                            relocatable symbol.  If a symbol is not
                            specified then the .ntyp directive is
                            flagged with a 'q' error.

                    ,       represents any legal separator (comma,
                            space, and/or tab).

                    arg     represents any legal expression or
                            symbol. If arg is not specified
                            then the .ntyp directive is flagged
                            with a 'q' error.

            The .ntyp directive, which can appear anywhere in an ASxxxx pro-
            gram, is used to determine the symbol or expression type as  ab-
            solute (0) or relocatable (1).

            2.4.4  .nval Directive

            Format:

            [label:]        .nval   symbol,arg

            where:  label   represents an optional statement label.

                    symbol  represents any legal symbol. The symbol
                            is equated to the value of arg and made
                            absolute.  If a symbol is not specified
                            then the .nval directive is flagged
                            with a 'q' error.

                    ,       represents any legal separator (comma,
                            space, and/or tab).

                    arg     represents any legal expression or
                            symbol. If arg is not specified
                            then the .nval directive is flagged

            THE MACRO PROCESSOR                                    PAGE 2-15
            MACRO ATTRIBUTE DIRECTIVES

                            with a 'q' error.

            The .nval directive, which can appear anywhere in an ASxxxx pro-
            gram, is used to determine the value of arg and make the  result
            an absolute value.

            2.5  INDEFINITE REPEAT BLOCK DIRECTIVES

               An  indefinite  repeat block is similar to a macro definition
            with only one dummy argument.  At each expansion  of  the  inde-
            finite  repeat  range, this dummy argument is replaced with suc-
            cessive elements of a real  argument  list.   Since  the  repeat
            directive  and its associated range are coded in-line within the
            source program, this type of macro definition and expansion does
            not require calling the macro by name, as required in the expan-
            sion of the conventional macros previously described.

               An  indefinite  repeat  block  can  appear  within or outside
            another macro definition, indefinite  repeat  block,  or  repeat
            block.   The  rules specifying indefinite repeat block arguments
            are the same as for specifying macro arguments.

            THE MACRO PROCESSOR                                    PAGE 2-16
            INDEFINITE REPEAT BLOCK DIRECTIVES

            2.5.1  .irp Directive

            Format:

                [label:]    .irp    sym,argument_list
                            .
                            .
                        (range of indefinite repeat block)
                            .
                            .
                            .endm

            where:  label   represents an optional statement label.

                    sym     represents a dummy argument that is
                            replaced with successive real arguments
                            from the argument list.  If the dummy
                            argument is not specified, the .irp
                            directive is flagged with a 'q' error.

                    ,       represents any legal separator (comma,
                            space, and/or tab).

              argument_list represents a list of real arguments
                            that are to be used in the expansion
                            of the indefinite repeat range. A real
                            argument may consist of one or more
                            7-bit ascii characters; multiple
                            arguments must be separated by any
                            legal separator (comma, space, and/or
                            tab).  If an argument must contain
                            a legal separator then the up-arrow
                            (_^) construct is require for that
                            argument.  If no real arguments are
                            specified, no action is taken.

                    range   represents the block of code to be
                            repeated once for each occurrence of
                            a real argument in the list.  The
                            range may contain other macro
                            definitions, repeat ranges and/or
                            the .mexit directive.

                    .endm   indicates the end of the indefinite
                            repeat block range.

            The .irp directive is used to replace a dummy argument with suc-
            cessive real arguments specified  in  an  argument  list.   This
            replacement  process  occurrs  during  the expansion of an inde-
            finite repeat block range.

            THE MACRO PROCESSOR                                    PAGE 2-17
            INDEFINITE REPEAT BLOCK DIRECTIVES

            2.5.2  .irpc Directive

            Format:

                [label:]    .irpc   sym,string
                            .
                            .
                        (range of indefinite repeat block)
                            .
                            .
                            .endm

            where:  label   represents an optional statement label.

                    sym     represents a dummy argument that is
                            replaced with successive real characters
                            from the argument string.  If the dummy
                            argument is not specified, the .irpc
                            directive is flagged with a 'q' error.

                    ,       represents any legal separator (comma,
                            space, and/or tab).

                    string  represents a list of 7-bit ascii
                            characters.  If the string contains
                            legal separator characters (comma,
                            space, and/or tab) then the up-arrow
                            (_^) construct must delimit the string.

                    range   represents the block of code to be
                            repeated once for each occurrence of
                            a real argument in the list.  The
                            range may contain other macro
                            definitions, repeat ranges and/or
                            the .mexit directive.

                    .endm   indicates the end of the indefinite
                            repeat block range.

            The .irpc directive is available to permit single character sub-
            stition.  On each iteration of the indefinite repeat range,  the
            dummy  argument  is  replaced  with successive characters in the
            specified string.

            THE MACRO PROCESSOR                                    PAGE 2-18
            INDEFINITE REPEAT BLOCK DIRECTIVES

            2.6  REPEAT BLOCK DIRECTIVE

               A repeat block is similar to a macro definition with only one
            argument.  The argument specifies the number of times the repeat
            block  is  inserted  into the assembly stream.  Since the repeat
            directive and its associated range are coded in-line within  the
            source program, this type of macro definition and expansion does
            not require calling the macro by name, as required in the expan-
            sion of the conventional macros previously described.

               A repeat block can appear within or outside another macro de-
            finition, indefinite repeat block, or repeat block.

            2.6.1  .rept

            Format:

                [label:]    .rept   exp
                            .
                            .
                        (range of repeat block)
                            .
                            .
                            .endm

            where:  label   represents an optional statement label.

                    exp     represents any legal expression.
                            This value controls the number of
                            times the block of code is to be assembled
                            within the program.  When the expression
                            value is less than or equal to zero (0),
                            the repeat block is not assembled.  If
                            this value is not an absolute value, the
                            .rept directive is flagged with an 'r'
                            error.

                    range   represents the block of code to be
                            repeated. The range may contain other
                            macro definitions, repeat ranges and/or
                            the .mexit directive.

                    .endm   indicates the end of the repeat block
                            range.

            The .rept directive is used to duplicate a block of code, a cer-
            tain number of times, in line with other source code.

            THE MACRO PROCESSOR                                    PAGE 2-19
            REPEAT BLOCK DIRECTIVE

            2.7  MACRO DELETION DIRECTIVE

               The  .mdelete  directive  deletes  the definitions of the the
            specified macro(s).

            2.7.1  .mdelete

            Format:

                    .mdelete        name1,name2,...,namen

            where:  name1,  represent legal macro names. When multiple
                    name2,  names are specified, they are separated
                    ...,    by any legal separator (comma, space, and/or
                    namen   tab).

            2.8  MACRO INVOCATION DETAILS

               The invocation of a macro, indefinite repeat block, or repeat
            block has specific implications for .if-.else-.endif  constructs
            and for .list-.nlist directives.

               At  the  point  a  macro,  indefinite repeat block, or repeat
            block is called the following occurs:

                    1)      The initial .if-.else-.endif
                            state is saved.

                    2)      The initial .list-.nlist
                            state is saved.

                    3)      The macro, indefinite repeat block,
                            or repeat block is inserted into the
                            assembler source code stream.  All
                            argument substitution is performed
                            at this point.

            When  the  macro  completes and after each pass through an inde-
            finite repeat block or repeat  block  the  .if-.else-.endif  and
            .list-.nlist state is reset to the initial state.

               The  reset of the .if-.else-.endif state means that the invo-
            cation of a macro, indefinite repeat block, or repeat block can-
            not  change the .if-.else-.endif state of the calling code.  For
            example the following code does not change the  .if-.else-.endif
            condition at macro completion:

            THE MACRO PROCESSOR                                    PAGE 2-20
            MACRO INVOCATION DETAILS

                    .macro  fnc     A
                      .if nb,^!A!
                        ...
                        .list (meb)
                        .mexit
                      .else
                        ...
                        .nlist
                        .mexit
                      .endif
                    .endm

            code:   fnc

               Within the macro the .if condition becomes false but the con-
            dition is not propagated outside the macro.

               Similarly,  when  the  .list-.nlist state is changed within a
            macro the change is not propogated outside the macro.

               The  normal  .if-.else-.endif  processing verifies that every
            .if has a corresponding .endif.  When a macro, indefinite repeat
            block,  or repeat block terminates by using the .mexit directive
            the .if-.endif checking is bypassed  because  all  source  lines
            between the .mexit and .endm directives are skipped.

            2.9  BUILDING A MACRO LIBRARY

               Using  the macro facilities of the ASxxxx assemblers a simple
            macro library can be built.  The macro library is built by  com-
            bining individual macros, sets of macros, or include file direc-
            tives into a single file.  Each macro entity is enclosed  within
            a .if/.endif block that selects the desired macro definitions.

               The  selection of specific macros to be imported in a program
            is performed by three macros, .mlib, .mcall,  and  .mload,  con-
            tained in the file mlib.def.

            THE MACRO PROCESSOR                                    PAGE 2-21
            BUILDING A MACRO LIBRARY

            2.9.1  .mlib Macro Directive

            Format:

                    .mlib   file

            where:  file    represents the macro library file name.
                            If the file name does not include a path
                            then the path of the current assembly
                            file is used.  If the file name (and/or
                            path) contains white space then the
                            path/name must be delimited with the
                            up-arrow (^) construct ^/    /.

            The .mlib directive defines two macros, .mcall and .mload, which
            when invoked will read a file, importing specific macro  defini-
            tions.   Any  previous  .mcall  and/or .mload directives will be
            deleted before the new .mcall and .mload directives are defined.

               The  .mload  directive  is an internal directive which simply
            includes the macro library file with the listing disabled.

               The  following  is the mlib.def file which defines the macros
            .mlib, .mcall, and .mload.

            THE MACRO PROCESSOR                                    PAGE 2-22
            BUILDING A MACRO LIBRARY

            ;************************************************
            ;*                                              *
            ;*    A simple Macro Library Implementation     *
            ;*                                              *
            ;*              December 2008                   *
            ;*                                              *
            ;************************************************

            .macro .mlib    FileName
              .if b,^!FileName!
                .error 1    ; File Name Required
                .mexit
              .endif
              .mdelete      .mcall
              .macro        .mcall  a,b,c,d,e,f,g,h
                .irp sym    ^!a!,^!b!,^!c!,^!d!,^!e!,^!f!,^!g!,^!h!
                  .iif nb,^!sym!    .define    .$$.'sym
                .endm
                .mload
                .irp sym    ^!a!,^!b!,^!c!,^!d!,^!e!,^!f!,^!g!,^!h!
                  .if nb,^!sym!
                    .iif ndef,sym'.$$.    .error  1  ; macro not found
                    .undefine       .$$.'sym
                    .undefine       sym'.$$.
                  .endif
                .endm
              .endm ;.mcall
              .mdelete      .mload
              .macro        .mload
                .nlist
                .include ^!FileName!
                .list
              .endm ;.mload
            .endm   ;.mlib

            2.9.2  .mcall Macro Directive

            Format:

                    .mcall  macro1,macro2,...,macro8

            where:

                    macro1, represents from 1 to 8 macro library
                    macro2, references to a macro definition or
                    ...,    set of macro definitions included in
                    macro8  the file specified with the .mlib macro.

            As  can  be  seen  from the macro definition of .mlib and .mcall
            shown above,  when  .mcall  is  invoked  temporary  symbols  are

            THE MACRO PROCESSOR                                    PAGE 2-23
            BUILDING A MACRO LIBRARY

            defined for each macro or macro set that is to be imported.  The
            macro .mload is then invoked to  load  the  macro  library  file
            specified in the call to .mlib.

               For example, when the following macros are invoked:

                    .mlib   crossasm.sml    ; Cross Assembler Macros
                    .mcall  M6809           ; M6809 Macro Group

            The  .mlib  macro  defines the .mload macro to access the system
            macro file crossasm.sml.  Invoking the .mcall  macro  creates  a
            temporary symbol, '.$$.M6809', and then invokes the macro .mload
            to import the system macro file crossasm.sml.   The  file  cros-
            sasm.sml  contains  conditional  statements  that define the re-
            quired macros and creates  a  temporary  symbol  'M6809.$$.'  to
            indicate  the  macro group was found.  If the macro is not found
            an error message is generated.

               The  following  is a small portion of the crossasm.sml system
            macro file which shows the M6809 macro group:

                    .title  Cross Assembler Macro Library

                    ; This MACRO Library is Case Insensitive.
                    ;

                    ...

            ; Macro Based 6809 Cross Assembler

            .$.SML.$. =: 0
            .if     idn     a,A
              .iif  def,.$$.m6809   .$.SML.$. = -1
            .else
              .iif  def,.$$.m6809   .$.SML.$. = -1
              .iif  def,.$$.M6809   .$.SML.$. =  1
            .endif
            .iif    lt,.$.SML.$.    .define         m6809.$$.
            .iif    gt,.$.SML.$.    .define         M6809.$$.
            .iif    ne,.$.SML.$.    .include        "m6809.mac"

                    ...

            THE MACRO PROCESSOR                                    PAGE 2-24
            EXAMPLE MACRO CROSS ASSEMBLERS

            2.10  EXAMPLE MACRO CROSS ASSEMBLERS

               The  'ascheck'  subdirectory 'macroasm' contains 7 assemblers
            written using only the general macro processing facility of  the
            ASxxxx assemblers:

                    i8085.mac       -  8085 Microprocessor
                    m6800.mac       -  6800 Microprocessor
                    m6801.mac       -  6801 Microprocessor
                    m6804.mac       -  6804 Microprocessor
                    m6805.mac       -  6805 Microprocessor
                    m6809.mac       -  6809 Microprocessor
                    s2650.mac       -  2650 Microprocessor

               These  absolute  macro  cross  assemblers are included to il-
            lustrate the  functionality  of  the  general  macro  processing
            facility  of  the ASxxxx assemblers.  In general they are useful
            examples of actual macro implementations.

                                        CHAPTER 3

                                       THE LINKER

            3.1  ASLINK RELOCATING LINKER

               ASLINK  is  the  companion  linker for the ASxxxx assemblers.
            The linker supports versions 3.xx, 4.xx, and 5.xx of the  ASxxxx
            assemblers.  Object files from version 3, 4, and 5 may be freely
            mixed while linking.  Note that version 3 object  files  contain
            only a subset of the options available in versions 4 and 5.

               The  program ASLINK is a general relocating linker performing
            the following functions:

                 1.  Bind multiple object modules into a single memory image

                 2.  Resolve inter-module symbol references

                 3.  Combine  code  belonging to the same area from multiple
                     object files into a single contiguous memory region

                 4.  Search and import object module libraries for undefined
                     global variables

                 5.  Perform   byte   and   word  program  counter  relative
                     (pc or pcr) addressing calculations

                 6.  Define absolute symbol values at link time

                 7.  Define absolute area base address values at link time

                 8.  Produce Intel Hex, Motorola S, or Tandy CoCo Disk Basic
                     output files

                 9.  Produce a map of the linked memory image

                10.  Produce  an updated listing file with the relocated ad-
                     dresses and data

            THE LINKER                                              PAGE 3-2
            INVOKING ASLINK

            3.2  INVOKING ASLINK

               Starting  ASlink without any arguments provides the following
            option list and then exits:

            Usage: [-Options] [-Option with arg] file
            Usage: [-Options] [-Option with arg] outfile file [file ...]
              -p   Echo commands to stdout (default)
              -n   No echo of commands to stdout
            Alternates to Command Line Input:
              -c                   ASlink >> prompt input
              -f   file[.lnk]      Command File input
            Librarys:
              -k   Library path specification, one per -k
              -l   Library file specification, one per -l
            Relocation:
              -b   area base address=expression
              -g   global symbol=expression
            Map format:
              -m   Map output generated as (out)file[.map]
              -w   Wide listing format for map file
              -x   Hexidecimal (default)
              -d   Decimal
              -q   Octal
            Output:
              -i   Intel Hex as (out)file[.i--]
              -s   Motorola S Record as (out)file[.s--]
              -t   Tandy CoCo Disk BASIC binary as (out)file[.bi-]
              -j   NoICE Debug output as (out)file[.noi]
              -y   SDCDB Debug output as (out)file[.cdb]
              -o   Linked file/library object output enable (default)
              -v   Linked file/library object output disable
            List:
              -u   Update listing file(s) with link data as file(s)[.rst]
            Case Sensitivity:
              -z   Disable Case Sensitivity for Symbols
            End:
              -e   or null line terminates input

                                          NOTE

                 When  ASlink  is  invoked  with  a single filename the
                 created output file will have the same filename as the
                 .rel file.

                 When  ASlink  is  invoked  with multiple filenames the
                 first filename is the output filename and the  remain-
                 ing  filenames  are  linked  together  into the output

            THE LINKER                                              PAGE 3-3
            INVOKING ASLINK

                 filename.

            Most  sytems  require  the  options to be entered on the command
            line:

              aslink [-Options] [-Options with args] file

              aslink [-Options] [-Options with args] outfile file1 [file2
            ...]

            Some  systems  may  request  the  arguments  after the linker is
            started at a system specific prompt:

              aslink
              argv: -[options] -[option arg] file

              aslink
              argv: [-Options] [-Options with args] outfile file1 [file2
            ...]

            The linker commands are explained in some more detail:

                 1.  -c        ASlink >> prompt mode.
                     The  ASlink >>  prompt  mode reads linker commands from
                     stdin.

                 2.  -f file   Command file mode.
                     The  command file mode imports linker commands from the
                     specified file (extension must be  .lnk),  imported  -c
                     and  -f  commands  are ignored.  If the directory path,
                     for a file to be linked, is not specified in  the  com-
                     mand  file  then  the  path  defaults  to the .lnk file
                     directory path.

                 3.  -p/-n     enable/disable echoing commands to stdout.

                 4.  -i/-s/-t  Intel  Hex (file.i--), Motorola S (file.s--),
                     or Tandy Color Computer  Disk  Basic  (file.bi-)  image
                     output file.

                 5.  -o/-v     Specifies      that     subsequent     linked
                     files/libraries will generate object  output  (default)
                     or  suppress  object  output.  (if option -i, -s, or -t
                     was specified)

                 6.  -z        Disable Case Sensitivity for Symbols

            THE LINKER                                              PAGE 3-4
            INVOKING ASLINK

                 7.  -m        Generate  a  map  file (file.map).  This file
                     contains a list of the symbols (by area) with  absolute
                     addresses, sizes of linked areas, and other linking in-
                     formation.

                 8.  -w        Specifies  that a wide listing format be used
                     for the map file.

                 9.  -xdq      Specifies  the  number radix for the map file
                     (Hexidecimal, Decimal, or Octal).

                10.  -u        Generate  an  updated listing file (file.rst)
                     derived from the relocated addresses and data from  the
                     linker.

                11.  file      File(s)  to  be  linked.  Files may be on the
                     same line as the above options or on a separate line(s)
                     one file per line or multiple files separated by spaces
                     or tabs.

                12.  -b  area=expression
                     (one definition per line in a linker command file.)
                     This  specifies  an area base address where the expres-
                     sion may contain constants and/or defined symbols  from
                     the linked files.

                13.  -g  symbol=expression
                     (one definition per line in a linker command file.)
                     This  specifies  the value for the symbol where the ex-
                     pression may contain constants and/or  defined  symbols
                     from the linked files.

                14.  -k  library directory path
                     (one definition per line in a linker command file.)
                     This  specifies one possible path to an object library.
                     More than one path is allowed.

                15.  -l  library file specification
                     (one definition per line in a linker command file.)
                     This  specifies a possible library file.  More than one
                     file is allowed.

                16.  -e  or null line, terminates input to the linker.

            THE LINKER                                              PAGE 3-5
            LIBRARY PATH(S) AND FILE(S)

            3.3  LIBRARY PATH(S) AND FILE(S)

               The process of resolving undefined symbols after scanning the
            input object  files  includes  the  scanning  of  object  module
            libraries.   The  linker will search through all combinations of
            the library path specifications (input by the -k option) and the
            library  file  specifications (input by the -l option) that lead
            to an existing library file.  Each library file contains a  list
            (one  file  per  line)  of  modules  included in this particular
            library.  Each existing object module is scanned for a match  to
            the undefined symbol.  The first module containing the symbol is
            then linked with the previous modules to resolve the symbol  de-
            finition.   The  library  object  modules are rescanned until no
            more symbols can be resolved.   The  scanning  algorithm  allows
            resolution  of  back references.  No errors are reported for non
            existant library files or object modules.

               The  library  file  specification may be formed in one of two
            ways:

                 1.  If  the  library  file  contained an absolute path/file
                     specification  then  this  is   the   object   module's
                     path/file.
                     (i.e.  C:\...  or C:/...)

                 2.  If  the  library  file  contains  a  relative path/file
                     specification then the concatenation of  the  path  and
                     this  file  specification  becomes  the object module's
                     path/file.
                     (i.e.  \...  or /...)

               As  an example, assume there exists a library file termio.lib
            in the syslib directory specifying the following object modules:

            \6809\io_disk        first object module
            d:\special\io_comm   second object module

            and the following parameters were specified to the linker:

            -k c:\iosystem\    the first path
            -k c:\syslib\      the second path

            -l termio          the first library file
            -l io              the second library file (no such file)

            The  linker  will attempt to use the following object modules to
            resolve any undefined symbols:

            c:\syslib\6809\io_disk.rel     (concatenated path/file)
            d:\special\io_comm.rel         (absolute path/file)

            THE LINKER                                              PAGE 3-6
            LIBRARY PATH(S) AND FILE(S)

            all  other path(s)/file(s) don't exist.  (No errors are reported
            for non existant path(s)/file(s).)

            3.4  ASLINK PROCESSING

               The  linker  processes  the  files  in  the  order  they  are
            presented.  The first pass through the input files  is  used  to
            define  all  program  areas, the section area sizes, and symbols
            defined or referenced.  Undefined symbols will initiate a search
            of any specified library file(s) and the importing of the module
            containing the symbol definition.  After the first pass  the  -b
            (area  base  address) definitions, if any, are processed and the
            areas linked.

               The  area  linking proceeds by first examining the area types
            ABS, CON, REL, OVR and PAG.  Absolute areas (ABS) from  separate
            object modules are always overlayed and have been assembled at a
            specific address, these are not normally relocated (if a -b com-
            mand  is  used  on an absolute area the area will be relocated).
            Relative areas (normally defined as REL|CON) have a base address
            of  0x0000  as read from the object files, the -b command speci-
            fies the beginning address of the area.  All subsequent relative
            areas  will  be  concatenated  with  proceeding  relative areas.
            Where specific ordering is desired, the first linker input  file
            should  have  the area definitions in the desired order.  At the
            completion of the area linking all area  addresses  and  lengths
            have  been determined.  The areas of type PAG are verified to be
            on a 256 byte boundary and that the length does not  exceed  256
            bytes.  Any errors are noted on stderr and in the map file.

               Next  the  global symbol definitions (-g option), if any, are
            processed.  The symbol definitions have been delayed until  this
            point because the absolute addresses of all internal symbols are
            known and can be used in the expression calculations.

               Before  continuing  with the linking process the symbol table
            is scanned to determine if any symbols have been referenced  but
            not defined.  Undefined symbols are listed on the stderr device.
            if a .module directive was included in the  assembled  file  the
            module  making  the reference to this undefined variable will be
            printed.

               Constants  defined  as global in more than one module will be
            flagged as multiple definitions if their values are not  identi-
            cal.

               After  the  preceeding  processes are complete the linker may
            output a map file (-m option).  This file provides the following
            information:

            THE LINKER                                              PAGE 3-7
            ASLINK PROCESSING

                 1.  Global symbol values and label absolute addresses

                 2.  Defined areas and there lengths

                 3.  Remaining undefined symbols

                 4.  List of modules linked

                 5.  List of library modules linked

                 6.  List of -b and -g definitions

               The final step of the linking process is performed during the
            second pass of the input files.  As the xxx.rel files  are  read
            the code is relocated by substituting the physical addresses for
            the referenced symbols and areas and may  be  output  in  Intel,
            Motorola, or Tandy CoCo Disk Basic formats.  The number of files
            linked and symbols defined/referenced is limited by the  proces-
            sor  space  available to build the area/symbol lists.  If the -u
            option is specified then the listing files (file.lst) associated
            with  the  relocation  files  (file.rel) are scanned and used to
            create a new file (file.rst) which has all  addresses  and  data
            relocated to their final values.

               The  -o/-v  options  allow the simple creation of loadable or
            overlay modules.  Loadable and overlay modules normally need  to
            be  linked  with  a  main module(s) to resolve external symbols.
            The -o/-v options can be used to enable object  output  for  the
            loadable  or overlay module(s) and suppress the object code from
            the linked main module(s).  The -o/-v  options  can  be  applied
            repeatedly  to specify a single linked file, groups of files, or
            libraries for object code inclusion or suppression.

            THE LINKER                                              Page 3-8
            ASXXXX VERSION 5.XX (4.XX) LINKING

            3.5  ASXXXX VERSION 5.XX (4.XX) LINKING

               The  linkers'  input  object file is an ascii file containing
            the information needed by the linker  to  bind  multiple  object
            modules into a complete loadable memory image.

            The object module contains the following designators:

                    [XDQ][HL][234]
                            X       Hexidecimal radix
                            D       Decimal radix
                            Q       Octal radix

                            H       Most significant byte first
                            L       Least significant byte first

                            2       16-Bit Addressing
                            3       24-Bit Addressing
                            4       32-Bit Addressing

                    H       Header
                    M       Module
                    G       Merge Mode
                    B       Bank
                    A       Area
                    S       Symbol
                    T       Object code
                    R       Relocation information
                    P       Paging information

            3.5.1  Object Module Format

               The   first   line   of   an   object   module  contains  the
            [XDQ][HL][234] format specifier  (i.e.   XH2  indicates  a  hex-
            idecimal  file  with  most significant byte first and 16-bit ad-
            dressing) for the following designators.

            THE LINKER                                              PAGE 3-9
            ASXXXX VERSION 5.XX (4.XX) LINKING

            3.5.2  Header Line

                    H aa areas gg global symbols

               The  header  line  specifies  the number of areas(aa) and the
            number of global symbols(gg) defined or referenced in  this  ob-
            ject module segment.

            3.5.3  Module Line

                    M name

               The  module  line  specifies  the module name from which this
            header segment was assembled.  The module line will  not  appear
            if the .module directive was not used in the source program.

            3.5.4  Merge Mode Line

                    G nn ii 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

               The  mode  structure  contains  the specification (or partial
            specification) of one of the assemblers' merge  modes.   Sixteen
            bits  may  be  specified  on a single line.  Each assembler must
            specify at least one merge mode.  The merging specification  al-
            lows  arbitrarily defined active bits and bit positions.  The 32
            element arrays are indexed from 0 to 31.  Index 0 corresponds to
            bit  0,  ...,  and  31 corresponds to bit 31 of a normal integer
            value.

                 1.   nn is merge mode number

                 2.   ii is the beginning bit position of the following data

                 3.   00 ...  merge mode bit elements

                        The value of the element specifies if the normal in-
                        teger bit is active (bit <7> is set, 0x80) and  what
                        destination  bit  (bits  <4:0>,  0  -  31) should be
                        loaded with this normal integer bit.

            THE LINKER                                             PAGE 3-10
            ASXXXX VERSION 5.XX (4.XX) LINKING

            3.5.5  Bank Line

                    B name base nn size nn map nn flags nn fsfx string

               The  B  line  defines a bank identifier as name.  A bank is a
            structure containing a collection of areas.  The bank is treated
            as  a  unique linking structure seperate from other banks.  Each
            bank can have a unique base  address  (starting  address).   The
            size  specification  may  be  used to signal the overflow of the
            banks' allocated space.  The Linker combines all areas  included
            within  a  bank  as  seperate from other areas.  The code from a
            bank may be output to a unique file by specifying the File  Suf-
            fix  parameter  (fsfx).   This allows the seperation of multiple
            data and code segments into  isolated  output  files.   The  map
            parameter  is  for  NOICE processing.  The flags indicate if the
            parameters have been set.

            3.5.6  Area Line

                    A label size ss flags ff

               The  area  line  defines the area label, the size (ss) of the
            area in bytes, and the area flags (ff).  The area flags  specify
            the ABS, REL, CON, OVR, and PAG parameters:

                    OVR/CON  (0x04/0x00 i.e.  bit position 2)

                    ABS/REL  (0x08/0x00 i.e.  bit position 3)

                    PAG      (0x10 i.e.  bit position 4)

            3.5.7  Symbol Line

                    S name Defnnnn

                            or

                    S name Refnnnn

               The symbol line defines (Def) or references (Ref) the identi-
            fier name with the value nnnn.  The defined value is relative to
            the  current area base address.  References to constants and ex-
            ternal global symbols will always appear before the  first  area
            definition.  References to external symbols will have a value of
            zero.

            THE LINKER                                             PAGE 3-11
            ASXXXX VERSION 5.XX (4.XX) LINKING

            3.5.8  T Line

                    T xx xx nn nn nn nn nn ...

               The  T  line contains the assembled code output by the assem-
            bler with xx xx being the offset address from the  current  area
            base address and nn being the assembled instructions and data in
            byte format.  (xx xx and nn nn can be 2, 3, or 4 bytes as speci-
            fied by the .REL file header.)

            3.5.9  R Line

                    R 0 0 nn nn n1 n2 xx xx ...

               The R line provides the relocation information to the linker.
            The nn nn value is the current area index, i.e.  which area  the
            current  values  were  assembled.  Relocation information is en-
            coded in groups of 4 bytes:

                 1.  n1 is the relocation mode and object format.
                     1.  bits <1:0> specify the number of bytes to output
                     2.  bits <2:3> normal(0x00) /   MSB   (0x0C)
                                    signed(0x04) / unsigned(0x08)
                     3.  bit 4  normal(0x00)/page   '0' (0x10) reference
                     4.  bit 5  normal(0x00)/page 'nnn' (0x20) reference
                                PAGX mode if both bits are set (0x30)
                     5.  bit 6  normal(0x00)/PC relative(0x40) relocation
                     6.  bit 7  relocatable area(0x00)/symbol(0x80)

                 2.  n2 is a byte index and a merge mode index
                     1.  bits <3:0>  are a byte index into the corresponding
                         (i.e.  preceeding) T line data (i.e.  a pointer  to
                         the data to be updated by the relocation).
                     2.  bits <7:4> are an index into a selected merge mode.
                         Currently mode 0 simply specifies to  use  standard
                         byte processing modes and merging is ignored.

                 3.  xx xx  is the area/symbol index for the area/symbol be-
                     ing referenced.  the corresponding area/symbol is found
                     in the header area/symbol lists.

            The groups of 4 bytes are repeated for each item requiring relo-
            cation in the preceeding T line.

            THE LINKER                                             PAGE 3-12
            ASXXXX VERSION 5.XX (4.XX) LINKING

            3.5.10  P Line

                    P 0 0 nn nn n1 n2 xx xx

               The  P  line provides the paging information to the linker as
            specified by a .setdp directive.  The format of  the  relocation
            information is identical to that of the R line.  The correspond-
            ing T line has the following information:
                    T xx xx aa aa bb bb

               Where  aa aa is the area reference number which specifies the
            selected page area and bb bb is the base address  of  the  page.
            bb bb will require relocation processing if the 'n1 n2 xx xx' is
            specified in the P line.  The linker will verify that  the  base
            address is on a 256 byte boundary and that the page length of an
            area defined with the PAG type is not larger than 256 bytes.

               The  linker  defaults any direct page references to the first
            area defined in the input REL file.  All ASxxxx assemblers  will
            specify the _CODE area first, making this the default page area.

            3.5.11  24-Bit and 32-Bit Addressing

               When  24-bit  or  32-bit  addressing is specified in the file
            format line [XDQ][HL][234] then the S and T Lines have  modified
            formats:
                    S name Defnnnnnn                        (24-bit)
                    S name Refnnnnnn                        (24-bit)
                    T xx xx xx nn nn nn nn nn ...           (24-bit)

                    S name Defnnnnnnnn                      (32-bit)
                    S name Refnnnnnnnn                      (32-bit)
                    T xx xx xx xx nn nn nn nn nn ...        (32-bit)

               The  multibyte  formats for byte data replace the 2-byte form
            for 16-bit data with 3-byte or 4-byte data for 24-bit or  32-bit
            data  respectively.  The 2nd byte format (also named MSB) always
            uses the second byte of the 2, 3, or 4-byte data.

            THE LINKER                                             PAGE 3-13
            ASXXXX VERSION 5.XX (4.XX) LINKING

            3.5.12  ASlink V5.xx (V4.xx) Error Messages

               The linker provides detailed error messages allowing the pro-
            grammer to quickly find the errant code.   As  the  linker  com-
            pletes  pass 1  over  the  input  file(s)  it  reports  any page
            boundary or page length errors as follows:

            ?ASlink-Warning-Paged Area PAGE0 Boundary Error

            and/or

            ?ASlink-Warning-Paged Area PAGE0 Length Error

            where PAGE0 is the paged area.

               Also  during  Pass   1  any bank size (length) errors will be
            reported as follows:

            ?ASlink-Warning-Size limit exceeded in bank BANK
            where BANK is the bank name.

               During  Pass  two the linker reads the T, R, and P lines per-
            forming the necessary relocations and  outputting  the  absolute
            code.  Various errors may be reported during this process
            The P line processing can produce only one possible error:

            ?ASlink-Warning-Page Definition Boundary Error
                     file        module      pgarea    pgoffset
              PgDef  t6809l      t6809l      PAGE0         0001

            The error message specifies the file and module where the .setdp
            direct was issued and indicates  the  page  area  and  the  page
            offset value determined after relocation.

            The R line processing produces various error messages:

            ?ASlink-Warning-Signed value error
            ?ASlink-Warning-Unsigned value error
            ?ASlink-Warning-Byte PCR relocation error
            ?ASlink-Warning-Word PCR relocation error
            ?ASlink-Warning-3-Byte PCR relocation error
            ?ASlink-Warning-4-Byte PCR relocation error
            ?ASlink-Warning-Page0 relocation error
            ?ASlink-Warning-PageN relocation error
            ?ASlink-Warning-PageX relocation error
            ?ASlink-Warning-Signed Merge Bit Range error
            ?ASlink-Warning-Unsigned/Overflow Merge Bit Range error

            These  error  messages  also specify the file, module, area, and
            offset within the area  of  the  code  referencing  (Refby)  and

            THE LINKER                                             PAGE 3-14
            ASXXXX VERSION 5.XX (4.XX) LINKING

            defining (Defin) the symbol:

            ?ASlink-Warning-Signed value error for symbol  two56
                     file        module      area        offset
              Refby  t           Pagetest    PROGRAM     0006
              Defin  t           Pagetest    DIRECT      0100

            If the symbol is defined in the same module as the reference the
            linker is unable to report the symbol name.  The assembler list-
            ing  file(s) should be examined at the offset from the specified
            area to locate the offending code.

               The errors are:

                 1.  The  Signed value error indicates an indexing value ex-
                     ceeded the maximum negative or maximum  positive  value
                     for the current variable size.

                 2.  The  Unsigned  value  error indicates an indexing value
                     was greater than maximum positive value for the current
                     variable size.

                 3.  The  byte PCR error is caused by exceeding the pc rela-
                     tive byte branch range.

                 4.  The  word PCR error is caused by exceeding the pc rela-
                     tive word branch range.

                 5.  The  3-byte PCR error is caused by exceeding the pc re-
                     lative 3-byte branch range.

                 6.  The  4-byte PCR error is caused by exceeding the pc re-
                     lative 4-byte branch range.

                 7.  The  Page0  error is generated if the direct page vari-
                     able is not in the page0 range of 0 to 255.

                 8.  The  PageN  error is generated if the direct page vari-
                     able is not within the Nth page range of 0 to 255.

                 9.  The  PageX  error is generated if the direct page vari-
                     able is not within the extended page range.

                10.  The  Signed Merge Bit Range error indicates an indexing
                     value exceeded the maximum negative or maximum positive
                     value for the current signed merge variable size.

                11.  The  Unsigned/Overflow  Merge Bit Range error indicates
                     an indexing value was  greater  than  maximum  positive
                     value for the current unsigned merge variable size.

            THE LINKER                                             Page 3-15
            ASXXXX VERSION 3.XX LINKING

            3.6  ASXXXX VERSION 3.XX LINKING

               The  linkers'  input  object file is an ascii file containing
            the information needed by the linker  to  bind  multiple  object
            modules into a complete loadable memory image.

            The object module contains the following designators:

                    [XDQ][HL][234]
                            X       Hexidecimal radix
                            D       Decimal radix
                            Q       Octal radix

                            H       Most significant byte first
                            L       Least significant byte first

                            2       16-Bit Addressing
                            3       24-Bit Addressing
                            4       32-Bit Addressing

                    H       Header
                    M       Module
                    A       Area
                    S       Symbol
                    T       Object code
                    R       Relocation information
                    P       Paging information

            3.6.1  Object Module Format

               The   first   line   of   an   object   module  contains  the
            [XDQ][HL][234] format specifier  (i.e.   XH2  indicates  a  hex-
            idecimal  file  with  most significant byte first and 16-bit ad-
            dressing) for the following designators.

            3.6.2  Header Line

                    H aa areas gg global symbols

               The  header  line  specifies  the number of areas(aa) and the
            number of global symbols(gg) defined or referenced in  this  ob-
            ject module segment.

            THE LINKER                                             PAGE 3-16
            ASXXXX VERSION 3.XX LINKING

            3.6.3  Module Line

                    M name

               The  module  line  specifies  the module name from which this
            header segment was assembled.  The module line will  not  appear
            if the .module directive was not used in the source program.

            3.6.4  Area Line

                    A label size ss flags ff

               The  area  line  defines the area label, the size (ss) of the
            area in bytes, and the area flags (ff).  The area flags  specify
            the ABS, REL, CON, OVR, and PAG parameters:

                    OVR/CON  (0x04/0x00 i.e.  bit position 2)

                    ABS/REL  (0x08/0x00 i.e.  bit position 3)

                    PAG      (0x10 i.e.  bit position 4)

            3.6.5  Symbol Line

                    S name Defnnnn

                            or

                    S name Refnnnn

               The symbol line defines (Def) or references (Ref) the identi-
            fier name with the value nnnn.  The defined value is relative to
            the  current area base address.  References to constants and ex-
            ternal global symbols will always appear before the  first  area
            definition.  References to external symbols will have a value of
            zero.

            3.6.6  T Line

                    T xx xx nn nn nn nn nn ...

               The  T  line contains the assembled code output by the assem-
            bler with xx xx being the offset address from the  current  area
            base address and nn being the assembled instructions and data in
            byte format.

            THE LINKER                                             PAGE 3-17
            ASXXXX VERSION 3.XX LINKING

            3.6.7  R Line

                    R 0 0 nn nn n1 n2 xx xx ...

               The R line provides the relocation information to the linker.
            The nn nn value is the current area index, i.e.  which area  the
            current  values  were  assembled.  Relocation information is en-
            coded in groups of 4 bytes:

                 1.  n1  is  the  relocation mode and object format, for the
                     adhoc extension modes refer to asxxxx.h or aslink.h
                     1.  bit 0  word(0x00)/byte(0x01)
                     2.  bit 1  relocatable area(0x00)/symbol(0x02)
                     3.  bit 2  normal(0x00)/PC relative(0x04) relocation
                     4.  bit 3  1-byte(0x00)/2-byte(0x08) object format
                     5.  bit 4  signed(0x00)/unsigned(0x10) byte data
                     6.  bit 5  normal(0x00)/page   '0'(0x20) reference
                     7.  bit 6  normal(0x00)/page 'nnn'(0x40) reference
                     8.  bit 7  LSB byte(0x00)/MSB byte(0x80)

                 2.  n2  is  a byte index into the corresponding (i.e.  pre-
                     ceeding) T line data (i.e.  a pointer to the data to be
                     updated  by  the  relocation).   The T line data may be
                     1-byte or  2-byte  byte  data  format  or  2-byte  word
                     format.

                 3.  xx xx  is the area/symbol index for the area/symbol be-
                     ing referenced.  the corresponding area/symbol is found
                     in the header area/symbol lists.

            The groups of 4 bytes are repeated for each item requiring relo-
            cation in the preceeding T line.

            3.6.8  P Line

                    P 0 0 nn nn n1 n2 xx xx

               The  P  line provides the paging information to the linker as
            specified by a .setdp directive.  The format of  the  relocation
            information is identical to that of the R line.  The correspond-
            ing T line has the following information:
                    T xx xx aa aa bb bb

               Where  aa aa is the area reference number which specifies the
            selected page area and bb bb is the base address  of  the  page.
            bb bb will require relocation processing if the 'n1 n2 xx xx' is
            specified in the P line.  The linker will verify that  the  base
            address is on a 256 byte boundary and that the page length of an
            area defined with the PAG type is not larger than 256 bytes.

            THE LINKER                                             PAGE 3-18
            ASXXXX VERSION 3.XX LINKING

               The  linker  defaults any direct page references to the first
            area defined in the input REL file.  All ASxxxx assemblers  will
            specify the _CODE area first, making this the default page area.

            3.6.9  24-Bit and 32-Bit Addressing

               When  24-bit  or  32-bit  addressing is specified in the file
            format line [XDQ][HL][234] then the S and T Lines have  modified
            formats:
                    S name Defnnnnnn                        (24-bit)
                    S name Refnnnnnn                        (24-bit)
                    T xx xx xx nn nn nn nn nn ...           (24-bit)

                    S name Defnnnnnnnn                      (32-bit)
                    S name Refnnnnnnnn                      (32-bit)
                    T xx xx xx xx nn nn nn nn nn ...        (32-bit)

               The  multibyte  formats for byte data replace the 2-byte form
            for 16-bit data with 3-byte or 4-byte data for 24-bit or  32-bit
            data  respectively.  The 2nd byte format (also named MSB) always
            uses the second byte of the 2, 3, or 4-byte data.

            3.6.10  ASlink V3.xx Error Messages

               The linker provides detailed error messages allowing the pro-
            grammer to quickly find the errant code.   As  the  linker  com-
            pletes  pass 1  over  the  input  file(s)  it  reports  any page
            boundary or page length errors as follows:

            ?ASlink-Warning-Paged Area PAGE0 Boundary Error

            and/or

            ?ASlink-Warning-Paged Area PAGE0 Length Error

            where PAGE0 is the paged area.

               During  Pass  two the linker reads the T, R, and P lines per-
            forming the necessary relocations and  outputting  the  absolute
            code.  Various errors may be reported during this process

            THE LINKER                                             PAGE 3-19
            ASXXXX VERSION 3.XX LINKING

            The P line processing can produce only one possible error:

            ?ASlink-Warning-Page Definition Boundary Error
                     file        module      pgarea      pgoffset
              PgDef  t6809l      t6809l      PAGE0       0001

            The error message specifies the file and module where the .setdp
            direct was issued and indicates  the  page  area  and  the  page
            offset value determined after relocation.

            The R line processing produces various errors:

            ?ASlink-Warning-Byte PCR relocation error for symbol  bra2
            ?ASlink-Warning-Unsigned Byte error for symbol  two56
            ?ASlink-Warning-Page0 relocation error for symbol  ltwo56
            ?ASlink-Warning-Page Mode relocation error for symbol  two56
            ?ASlink-Warning-Page Mode relocation error
            ?ASlink-Warning-2K Page relocation error
            ?ASlink-Warning-512K Page relocation error

            These  error  messages  also specify the file, module, area, and
            offset within the area of the code referencing (Refby)  and  de-
            fining (Defin) the symbol:

            ?ASlink-Warning-Unsigned Byte error for symbol  two56
                     file        module      area        offset
              Refby  t6800l      t6800l      DIRECT      0015
              Defin  tconst      tconst      .  .ABS.    0100

            If the symbol is defined in the same module as the reference the
            linker is unable to report the symbol name.  The assembler list-
            ing  file(s) should be examined at the offset from the specified
            area to locate the offending code.

               The errors are:

                 1.  The  byte PCR error is caused by exceeding the pc rela-
                     tive byte branch range.

                 2.  The Unsigned byte error indicates an indexing value was
                     negative or larger than 255.

                 3.  The  Page0  error is generated if the direct page vari-
                     able is not in the page0 range of 0 to 255.

                 4.  The page mode error is generated if the direct variable
                     is not within the current direct page (6809).

                 5.  The  2K  Page  relocation  error  is  generated  if the
                     destination is not within the current  2K  page  (8051,
                     DS8xCxxx).

            THE LINKER                                             PAGE 3-20
            ASXXXX VERSION 3.XX LINKING

                 6.  The  512K  Page  relocation  error  is generated if the
                     destination  is  not  within  the  current  512K   page
                     (DS80C390).

            THE LINKER                                             Page 3-21
            INTEL IHX OUTPUT FORMAT

            3.7  INTEL IHX OUTPUT FORMAT (16-BIT)

            Record Mark Field    -  This  field  signifies  the  start  of a
                                    record, and consists of an  ascii  colon
                                    (:).

            Record Length Field  -  This   field   consists   of  two  ascii
                                    characters which indicate the number  of
                                    data   bytes   in   this   record.   The
                                    characters are the result of  converting
                                    the  number  of  bytes  in binary to two
                                    ascii characters, high digit first.   An
                                    End  of  File  record contains two ascii
                                    zeros in this field.

            Load Address Field   -  This  field  consists  of the four ascii
                                    characters which result from  converting
                                    the  the  binary value of the address in
                                    which to begin loading this record.  The
                                    order is as follows:

                                        High digit of high byte of address.
                                        Low digit of high byte of address.
                                        High digit of low byte of address.
                                        Low digit of low byte of address.

                                    In an End of File record this field con-
                                    sists of either four ascii zeros or  the
                                    program entry address.

            Record Type Field    -  This  field  identifies the record type,
                                    which is either 0 for data records or  1
                                    for  an End of File record.  It consists
                                    of two ascii characters, with  the  high
                                    digit of the record type first, followed
                                    by the low digit of the record type.

            Data Field           -  This  field consists of the actual data,
                                    converted to two ascii characters,  high
                                    digit first.  There are no data bytes in
                                    the End of File record.

            Checksum Field       -  The  checksum  field is the 8 bit binary
                                    sum of the record length field, the load
                                    address  field,  the  record type field,
                                    and the data field.  This  sum  is  then
                                    negated  (2's  complement) and converted
                                    to  two  ascii  characters,  high  digit
                                    first.

            THE LINKER                                             Page 3-22
            INTEL I86 OUTPUT FORMAT

            3.8  INTEL I86 OUTPUT FORMAT (24 OR 32-BIT)

            Record Mark Field    -  This  field  signifies  the  start  of a
                                    record, and consists of an  ascii  colon
                                    (:).

            Record Length Field  -  This   field   consists   of  two  ascii
                                    characters which indicate the number  of
                                    data   bytes   in   this   record.   The
                                    characters are the result of  converting
                                    the  number  of  bytes  in binary to two
                                    ascii characters, high digit first.   An
                                    End  of  File  record contains two ascii
                                    zeros in this field.

            Load Address Field   -  This  field  consists  of the four ascii
                                    characters which result from  converting
                                    the  the  binary value of the address in
                                    which to begin loading this record.  The
                                    order is as follows:

                                        High digit of high byte of address.
                                        Low digit of high byte of address.
                                        High digit of low byte of address.
                                        Low digit of low byte of address.

                                    In an End of File record this field con-
                                    sists of either four ascii zeros or  the
                                    program entry address.

            Record Type Field    -  This  field  identifies the record type,
                                    which is either 0 for  data  records,  1
                                    for  an  End  of File record, or 4 for a
                                    segment  record.   It  consists  of  two
                                    ascii characters, with the high digit of
                                    the record type first, followed  by  the
                                    low digit of the record type.

            Data Field           -  This  field consists of the actual data,
                                    converted to two ascii characters,  high
                                    digit first.  There are no data bytes in
                                    the End of File record.

            Checksum Field       -  The  checksum  field is the 8 bit binary
                                    sum of the record length field, the load
                                    address  field,  the  record type field,
                                    and the data field.  This  sum  is  then
                                    negated  (2's  complement) and converted
                                    to  two  ascii  characters,  high  digit
                                    first.

            THE LINKER                                             Page 3-23
            MOTOROLA S1-S9 OUTPUT FORMAT

            3.9  MOTORLA S1-S9 OUTPUT FORMAT (16-BIT)

            Record Type Field    -  This  field  signifies  the  start  of a
                                    record and  identifies  the  the  record
                                    type as follows:

                                        Ascii S1 - Data Record
                                        Ascii S9 - End of File Record

            Record Length Field  -  This  field  specifies the record length
                                    which includes the  address,  data,  and
                                    checksum   fields.   The  8  bit  record
                                    length value is converted to  two  ascii
                                    characters, high digit first.

            Load Address Field   -  This  field  consists  of the four ascii
                                    characters which result from  converting
                                    the  the  binary value of the address in
                                    which to begin loading this record.  The
                                    order is as follows:

                                        High digit of high byte of address.
                                        Low digit of high byte of address.
                                        High digit of low byte of address.
                                        Low digit of low byte of address.

                                    In an End of File record this field con-
                                    sists of either four ascii zeros or  the
                                    program entry address.

            Data Field           -  This  field consists of the actual data,
                                    converted to two ascii characters,  high
                                    digit first.  There are no data bytes in
                                    the End of File record.

            Checksum Field       -  The  checksum  field is the 8 bit binary
                                    sum of the record length field, the load
                                    address field, and the data field.  This
                                    sum is then  complemented  (1's  comple-
                                    ment)   and   converted   to  two  ascii
                                    characters, high digit first.

            THE LINKER                                             Page 3-24
            MOTOROLA S2-S8 OUTPUT FORMAT

            3.10  MOTORLA S2-S8 OUTPUT FORMAT (24-BIT)

            Record Type Field    -  This  field  signifies  the  start  of a
                                    record and  identifies  the  the  record
                                    type as follows:

                                        Ascii S2 - Data Record
                                        Ascii S8 - End of File Record

            Record Length Field  -  This  field  specifies the record length
                                    which includes the  address,  data,  and
                                    checksum   fields.   The  8  bit  record
                                    length value is converted to  two  ascii
                                    characters, high digit first.

            Load Address Field   -  This  field  consists  of  the six ascii
                                    characters which result from  converting
                                    the  the  binary value of the address in
                                    which to begin loading this record.  The
                                    order is as follows:

                                        High digit of 3rd byte of address.
                                        Low digit of 3rd byte of address.
                                        High digit of high byte of address.
                                        Low digit of high byte of address.
                                        High digit of low byte of address.
                                        Low digit of low byte of address.

                                    In an End of File record this field con-
                                    sists of either six ascii zeros  or  the
                                    program entry address.

            Data Field           -  This  field consists of the actual data,
                                    converted to two ascii characters,  high
                                    digit first.  There are no data bytes in
                                    the End of File record.

            Checksum Field       -  The  checksum  field is the 8 bit binary
                                    sum of the record length field, the load
                                    address field, and the data field.  This
                                    sum is then  complemented  (1's  comple-
                                    ment)   and   converted   to  two  ascii
                                    characters, high digit first.

            THE LINKER                                             Page 3-25
            MOTOROLA S3-S7 OUTPUT FORMAT

            3.11  MOTORLA S3-S7 OUTPUT FORMAT (32-BIT)

            Record Type Field    -  This  field  signifies  the  start  of a
                                    record and  identifies  the  the  record
                                    type as follows:

                                        Ascii S3 - Data Record
                                        Ascii S7 - End of File Record

            Record Length Field  -  This  field  specifies the record length
                                    which includes the  address,  data,  and
                                    checksum   fields.   The  8  bit  record
                                    length value is converted to  two  ascii
                                    characters, high digit first.

            Load Address Field   -  This  field  consists of the eight ascii
                                    characters which result from  converting
                                    the  the  binary value of the address in
                                    which to begin loading this record.  The
                                    order is as follows:

                                        High digit of 4th byte of address.
                                        Low digit of 4th byte of address.
                                        High digit of 3rd byte of address.
                                        Low digit of 3rd byte of address.
                                        High digit of high byte of address.
                                        Low digit of high byte of address.
                                        High digit of low byte of address.
                                        Low digit of low byte of address.

                                    In an End of File record this field con-
                                    sists of either eight ascii zeros or the
                                    program entry address.

            Data Field           -  This  field consists of the actual data,
                                    converted to two ascii characters,  high
                                    digit first.  There are no data bytes in
                                    the End of File record.

            Checksum Field       -  The  checksum  field is the 8 bit binary
                                    sum of the record length field, the load
                                    address field, and the data field.  This
                                    sum is then  complemented  (1's  comple-
                                    ment)   and   converted   to  two  ascii
                                    characters, high digit first.

            THE LINKER                                             Page 3-26
            TANDY COLOR COMPUTER DISK BASIC BINARY FORMAT

            3.12  TANDY COLOR COMPUTER DISK BASIC FORMAT

            Record Preamble      -  This  field  is either $00 (for start of
                                    new record) or $FF (for last  record  in
                                    file).

            Record Length Field  -  This  field specifies the number of data
                                    bytes which follows the  address  field.
                                    The  length  is  in  binary  MSB  to LSB
                                    order.

                                        16-Bit Length - 2-bytes
                                        24-Bit Length - 3-bytes
                                        32-Bit Length - 4-bytes

            Load Address Field   -  This field consists of the address where
                                    the record will be loaded  into  memory.
                                    The  address  is  in  binary  MSB to LSB
                                    order.

                                        16-Bit Address - 2-bytes
                                        24-Bit Address - 3-bytes
                                        32-Bit Address - 4-bytes

            Data Field           -  This field consists of the actual binary
                                    data.

               After  the  last  code  segment,  a final record like the one
            above is placed.  In this final segment, the Record Preamble  is
            $FF,  the Record Length Field is $0000 and the Load Adress Field
            is the execution address.

                                        CHAPTER 4

                               BUILDING ASXXXX AND ASLINK

               The assemblers and linker have been successfully compiled for
            Linux, DOS, and various flavors of Windows using the Linux  GCC,
            the Cygwin environment, the DJGPP environment, and the graphical
            user   interfaces   and    command    line    environments    of
            MS Visual C++ V6.0,   MS Visual Studio 2005,   Open Watcom V1.7,
            Symantec C/C++ V7.2, and Turbo C 3.0.

               Makefiles  for  Linux,  Cygwin,  DJGPP,  project  files and a
            makefile for Turbo C and psuedo makefiles and project files  for
            VC6, VS2005, Open Watcom and Symantec are available to build all
            the assemblers and the linker.

               Unpack  the  asxv5pxx.zip  file into an appropriate directory
            using the utility appropriate to your environment.  For  DOS  or
            Windows  the following command line will unpack the distribution
            zip file:

                    pkunzip -d asxv5pxx.zip

            The  distribution  file  has  been  packed with DOS style end of
            lines (CR/LF), and UPPER CASE file names.  The Linux  make  file
            assumes  all  lower  case directories and file names.  For Linux
            the unpacking utility you choose should have an option to  force
            all  lower  case  directories / file names and convert the ascii
            files to local format.  On most systems  the  following  command
            should do the trick:

                    unzip -L -a asxv5pxx.zip

            Some systems may require a -LL option to force all lower case.

               The  distribution  will  be  unpacked into the base directory
            'asxv5pxx' which will contain source directories for  each  sup-
            ported  processor  (as6800, asz80, ...), the machine independent
            source  (asxxsrc),  the  linker  source   (linksrc),   and   the
            miscellaneous sources (asxxmisc).  Other directories include the

            BUILDING ASXXXX AND ASLINK                              Page 4-2

            documentation (asxdoc), test file directory (asxtst),  html  do-
            cumentation  (asxhtml),  NoICE  support  files  (noice), various
            debug monitors that can be assembled with the ASxxxx  assemblers
            (asmasm),  project files for an application that uses the AS6809
            assembler and ASlink linker (project), and the packaging  direc-
            tory (zipper).

            4.1  BUILDING ASXXXX AND ASLINK WITH LINUX

               The  Linux  build  directory is /asxv5pxx/asxmak/linux/build.
            The makefile in this directory is compatible with the Linux  GNU
            make and GCC.  The command

                    make clean

            will  remove  all  the  current  executable  files  in directory
            /asxv5pxx/asxmak/linux/exe and all the compiled  object  modules
            from the /asxv5pxx/asxmak/linux/build directory.

               The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            4.2  BUILDING ASXXXX AND ASLINK UNDER CYGWIN

               The  Cygwin build directory is \asxv5pxx\asxmak\cygwin\build.
            The makefile in this directory is compatible with the Cygwin GNU
            make and GCC.  The command

                    make clean

            will  remove  all  the  current  executable  files  in directory
            \asxv5pxx\asxmak\cygwin\exe and all the compiled object  modules
            from the \asxv5pxx\asxmak\cygwin\build directory.  The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

            BUILDING ASXXXX AND ASLINK                              PAGE 4-3
            BUILDING ASXXXX AND ASLINK UNDER CYGWIN

                    make aslink

            4.3  BUILDING ASXXXX AND ASLINK WITH DJGPP

               The  DJGPP  build  directory is \asxv5pxx\asxmak\djgpp\build.
            The makefile in this directory is compatible with the DJGPP  GNU
            make and GCC.  The command

                    make clean

            will  remove  all  the  current  executable  files  in directory
            \asxv5pxx\asxmak\djgpp\exe and all the compiled  object  modules
            from the \asxv5pxx\asxmak\djgpp\build directory.  The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            4.4  BUILDING ASXXXX AND ASLINK WITH BORLAND'S TURBO C++ 3.0

               The  Borland  product  is  available in the Borland Turbo C++
            Suite which contains C++ Builder 1.0, Turbo C++ 4.5 for  Windows
            and  Turbo C++ 3.0 for DOS.  The DOS IDE will install and run on
            any version of Windows (including Windows Vista [Longhorn]).

            4.4.1  Graphical User Interface

               Each   ASxxxx   Assembler  has  two  project  specific  files
            (*.dsk and *.prj)     located      in      the      subdirectory
            \asxv5pxx\asxmak\turboc30\build.    You   must  enter  the  .prj
            filename into the Turbo C++ IDE:  enter Options->Directories and
            change  the  include and output directories to match your confi-
            guration.  After these changes have been made you will  be  able
            to compile the selected project.  These changes must be manually
            entered for each project.

            BUILDING ASXXXX AND ASLINK                              PAGE 4-4
            BUILDING ASXXXX AND ASLINK WITH BORLAND'S TURBO C++ 3.0

            4.4.2  Command Line Interface

               Before  the  command line interface can be used you must per-
            form the steps outlined in the 'Graphical  User  Interface'  in-
            structions above for each project you wish to build.

               Open      a      command     prompt     window     in     the
            \asxv5pxx\asxmak\turboc30\build directory.  Assuming the Turbo C
            compiler  has been installed in the default location (C:\TC) the
            file _setpath.bat will set the PATH variable.  If  this  is  not
            the case then the line

            PATH=C:\TC;C:\TC\BIN;C:\TC\INCLUDE

            must  be changed to match your environment.  The compiled object
            code      modules      will      be      placed      in      the
            \asxv5pxx\asxmak\turboc30\build\  directory  and  the executable
            files will be placed in the \asxv5pxx\asxmak\turboc30\exe direc-
            tory.

               The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            The Turbo C make utility uses the information in the correspond-
            ing .prj and .dsk files to compile and link the programs.

               The file _makeall.bat found in the directory can also be used
            to invoke the Turbo C command line compiler.   The  _makeall.bat
            file calls the _setpath.bat file to set the path to the compiler
            directories in the environment variable PATH  and  then  invokes
            'make all'.

               The  command  file  _clean.bat may be used to remove all com-
            piled .obj files and linked .exe executables.

            BUILDING ASXXXX AND ASLINK                              PAGE 4-5
            BUILDING ASXXXX AND ASLINK WITH MS VISUAL C++ 6.0

            4.5  BUILDING ASXXXX AND ASLINK WITH MS VISUAL C++ 6.0

            4.5.1  Graphical User Interface

               Each  ASxxxx Assembler has a VC6 project file (*.dsw) located
            in a subdirectory of \asxv5pxx\asxmak\vc6\build.   Simply  enter
            this project filename into the VC6 IDE and build/rebuild the as-
            sembler.

            4.5.2  Command Line Interface

               Open      a      command     prompt     window     in     the
            \asxv5pxx\asxmak\vc6\build directory.  The file  make.bat  found
            in the directory can be used to invoke the VC6 command line com-
            piler.  The make.bat file assumes that the Visual  C++  compiler
            has  been installed in the default location.  If this is not the
            case then the line

            SET MS$DEV="C:\Program Files\Microsoft Visual Studio\
                           Common\MSDev98\Bin\msdev.exe"

            must  be changed to match your environment.  The compiled object
            code      modules      will      be      placed      in      the
            \asxv5pxx\asxmak\vc6\build\as----\release directory and the exe-
            cutable files will be  placed  in  the  \asxv5pxx\asxmak\vc6\exe
            directory.

               The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            The  VC6  command line compiler uses the information in the cor-
            responding .dsw/.dsp files to compile and link the programs.

               The  command  'make clean' is not required or valid as a make
            of anything does a complete rebuild of the program.

            BUILDING ASXXXX AND ASLINK                              PAGE 4-6
            BUILDING ASXXXX AND ASLINK WITH MS VISUAL STUDIO 2005

            4.6  BUILDING ASXXXX AND ASLINK WITH MS VISUAL STUDIO 2005

            4.6.1  Graphical User Interface

               Each  ASxxxx Assembler has a VS05 project file (*.vcproj) lo-
            cated in a subdirectory of \asxv5pxx\asxmak\vs05\build.   Simply
            enter  this project filename into the VS05 IDE and build/rebuild
            the assembler.

            4.6.2  Command Line Interface

               Open      a      command     prompt     window     in     the
            \asxv5pxx\asxmak\vs05\build directory.  The file make.bat  found
            in  the  directory  can  be used to invoke the VS05 command line
            compiler.  The make.bat file assumes that the  Visual  C++  com-
            piler  has  been  installed in the default location.  If this is
            not the case then the line

            SET VC$BUILD="C:\Program Files\Microsoft Visual Studio 8\
                             Common\MSDev98\Bin\msdev.exe"

            must  be changed to match your environment.  The compiled object
            code      modules      will      be      placed      in      the
            \asxv5pxx\asxmak\vs05\build\as----\release directory and the ex-
            ecutable files will be placed in  the  \asxv5pxx\asxmak\vs05\exe
            directory.

               The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            The  VS05 command line compiler uses the information in the cor-
            responding .vcproj file to compile and link the programs.

               The  command  'make clean' is not required or valid as a make
            of anything does a complete rebuild of the program.

            BUILDING ASXXXX AND ASLINK                              PAGE 4-7
            BUILDING ASXXXX AND ASLINK WITH OPEN WATCOM V1.7

            4.7  BUILDING ASXXXX AND ASLINK WITH OPEN WATCOM V1.7

            4.7.1  Graphical User Interface

               Each ASxxxx Assembler has a set of project files (.prj, .tgt,
            .mk,   .mk1,   and   .lk1)   located   in    the    subdirectory
            \asxv5pxx\asxmak\watcom\build.   You  will have to edit the pro-
            ject files to match your local file locations.

            4.7.2  Command Line Interface

               Open      a      command     prompt     window     in     the
            \asxv5pxx\asxmak\watcom\build directory.   Assuming  the  Watcom
            compiler  has been installed in the default location (C:\WATCOM)
            the file _setpath.bat will set the PATH variable.   If  this  is
            not the case then the line

            PATH=C:\WATCOM\BINNT;C:\WATCOM\BINW

            must  be changed to match your environment.  The compiled object
            code      modules      will      be      placed      in      the
            \asxv5pxx\asxmak\watcom\build\   directory  and  the  executable
            files will be placed in the  \asxv5pxx\asxmak\watcom\exe  direc-
            tory.

               The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            The  Watcom command line compiler wmake.exe uses the information
            in the corresponding project files to compile and link the  pro-
            grams.

               The file _makeall.bat found in the directory can also be used
            to invoke the Watcom command line  compiler.   The  _makeall.bat
            file calls the _setpath.bat file to set the path to the compiler

            BUILDING ASXXXX AND ASLINK                              PAGE 4-8
            BUILDING ASXXXX AND ASLINK WITH OPEN WATCOM V1.7

            directories in the environment variable PATH  and  then  invokes
            'make all'.

               The  command  'make clean' is not required or valid as a make
            of anything does a complete rebuild of the program.

            4.8  BUILDING ASXXXX AND ASLINK WITH SYMANTEC C/C++ V7.2

               The  Symantec  product is no longer available but is included
            for historical reasons (the final version, 7.5,  was  introduced
            in  1996).   The  product had an excellent graphical user inter-
            face, built in editor, project manager, and supported  DOS,  Ex-
            tended  DOS  (the  executable  contained a built in DOS extender
            which was rendered unusable in Windows 2000, after service  pack
            2, or in Windows XP), Win95, and Windows NT.

            4.8.1  Graphical User Interface

               Each  ASxxxx Assembler has a series of project specific files
            (*.bro, *.def, *.dpd, *.lnk, *.mak, *.opn, and *.prj) located in
            in  the  subdirectory \asxv5pxx\asxmak\symantec\build.  You must
            enter the .prj filename into the Symantec IDE  and  then  select
            Project->Settings->Directories  and  change the include, target,
            and compiler output directories  to  match  your  configuration.
            After  these  changes have been made you will be able to compile
            the selected project.  These changes must  be  manually  entered
            for each project.

            4.8.2  Command Line Interface

               Before  the  command line interface can be used you must per-
            form the steps outlined in the 'Graphical  User  Interface'  in-
            structions above for each project you wish to build.

               Open      a      command     prompt     window     in     the
            \asxv5pxx\asxmak\symantec\build directory.   The  file  make.bat
            found  in  the directory can be used to invoke the Symantec com-
            mand line compiler.  The make.bat file assumes that the path  to
            the  compiler  directories has been set in the environment vari-
            able PATH.  Assuming the Symantec compiler has been installed in
            the  default location (C:\SC) the file _setpath.bat will set the
            PATH variable.  If this is not the case then the line

            PATH=C:\SC;C:\SC\BIN;C:\SC\INCLUDE;C:\SC\LIB

            must  be changed to match your environment.  The compiled object

            BUILDING ASXXXX AND ASLINK                              PAGE 4-9
            BUILDING ASXXXX AND ASLINK WITH SYMANTEC C/C++ V7.2

            code      modules      will      be      placed      in      the
            \asxv5pxx\asxmak\symantec\build  directory  and  the  executable
            files will be placed in the \asxv5pxx\asxmak\symantec\exe direc-
            tory.

               The command

                    make all

            will compile and link all the ASxxxx assemblers, the ASlink pro-
            gram, and the utility programs asxscn and asxcnv.  The make file
            can make a single program by invoking make with the specific as-
            sembler, linker, or utility you wish to build:

                    make aslink

            The  Symantec  make utility , smake.exe, uses the information in
            the corresponding .mak files to compile and link the programs.

               The file _makeall.bat found in the directory can also be used
            to invoke the Symantec command line compiler.  The  _makeall.bat
            file calls the _setpath.bat file to set the path to the compiler
            directories in the environment variable PATH  and  then  invokes
            'make all'.

               The  command  file  _clean.bat may be used to remove all com-
            piled .obj files and linked .exe executables.

                                       APPENDIX A

                               ASXSCN LISTING FILE SCANNER

               The  program  ASXSCN  is  a debugging utility program used to
            verify ASxxxx assembler code generation.  The program may be in-
            voked with any of the following options:

                    Usage: [-dqx234i] file
                      d    decimal listing
                      q    octal   listing
                      x    hex     listing (default)
                      2    16-Bit  address (default)
                      3    24-Bit  address
                      4    32-Bit  address
                      i    ignore relocation flags

               Select  one of the -d, -q, or -x options to match the listing
            file format and select only one of the -2, -3, or -4 options  to
            match  the  addressing range of the listing file.  The -i option
            inhibits the verification  of  the  assembler  relocation  flags
            generated by the ASxxxx assemblers -f or -ff options.

               Each  source assembly line selected for verification must in-
            clude the expected output code in the comment field of the line.
            The  following  has  been  extracted  from the ASF2MC8 test file
            tf2mc8.asm:

                    reti            ; 30
                    call  ext       ; 31s12r34
                    subc  a         ; 32
                    subcw a         ; 33
                    subc  a,#v22    ; 34r22
                    subc  a,*dir    ; 35*33
                    subc  a,@ix+off ; 36r44
                    subc  a,@ep     ; 37

            The  r,  s,  and * are specific address relocation flags created
            when the -ff option is specified with any ASxxxx assembler.

            ASXSCN LISTING FILE SCANNER                             Page A-2

               Invoking the assembler:

                    asf2mc8 -gloaxff tf2mc8

            produces a listing file:

            033B 30          677    reti            ; 30
            033C 31s12r34    678    call  ext       ; 31s12r34
            033F 32          679    subc  a         ; 32
            0340 33          680    subcw a         ; 33
            0341 34r22       681    subc  a,#v22    ; 34r22
            0343 35*33       682    subc  a,*dir    ; 35*33
            0345 36r44       683    subc  a,@ix+off ; 36r44
            0347 37          684    subc  a,@ep     ; 37

               The  expected code can be compared with the generated code by
            invoking the scanning program:

                    asxscn tf2mc8.lst
                    0 code error(s) found in file tf2mc8.lst

            The assembled code can also be linked:

                    aslink -u ...options... t2fc8

            to create an updated listing file:

            033B 30          677    reti            ; 30
            033C 31 12 34    678    call  ext       ; 31s12r34
            033F 32          679    subc  a         ; 32
            0340 33          680    subcw a         ; 33
            0341 34 22       681    subc  a,#v22    ; 34r22
            0343 35 33       682    subc  a,*dir    ; 35*33
            0345 36 44       683    subc  a,@ix+off ; 36r44

            which resolves all relocations and removes the relocation flags.
            This file can also be verified:

                    asxscn -i tf2mc8.rst
                    0 code error(s) found in file tf2mc8.rst

               The  verification  of  both  the .lst and .rst files from the
            same assembler test file requires careful definition of external
            variables  so  that  the  assembler  listing file and the linker
            listing file have the same code values.

                                       APPENDIX B

                                ASXCNV LISTING CONVERTER

               The  program  ASXCNV  is  a debugging utility program used to
            create an assembler file with verification  data.   The  program
            may be invoked with any of the following options:

                    Usage: [-dqx234] file
                      d    decimal listing
                      q    octal   listing
                      x    hex     listing (default)
                      2    16-Bit  address (default)
                      3    24-Bit  address
                      4    32-Bit  address

               Select  one of the -d, -q, or -x options to match the listing
            file format and select only one of the -2, -3, or -4 options  to
            match the addressing range of the listing file.

               Each source assembly line which creates output data will have
            the data appended to the source line as a comment.  The appended
            comment will contain the relocation codes if they are present in
            the listing file.  Any existing comment  on  the  line  will  be
            overwritten.

               Given an existing listing file, a.lst, containing:

            033B 30          677    reti
            033C 31s12r34    678    call  ext
            033F 32          679    subc  a
            0340 33          680    subcw a
            0341 34r22       681    subc  a,#v22
            0343 35*33       682    subc  a,*dir
            0345 36r44       683    subc  a,@ix+off
            0347 37          684    subc  a,@ep

            A  converted  listing  file  can  be created using the following
            command:

            ASXCNV LISTING CONVERTER                                Page B-2

                    asxcnv -d2 a.lst

            The  created output file, a.out, is a new assembly file now con-
            tain the verification data in the comments:

                    reti            ; 30
                    call  ext       ; 31s12r34
                    subc  a         ; 32
                    subcw a         ; 33
                    subc  a,#v22    ; 34r22
                    subc  a,*dir    ; 35*33
                    subc  a,@ix+off ; 36r44
                    subc  a,@ep     ; 37

                                       APPENDIX C

                                S19OS9 CONVERSION UTILITY

            C.1  BACKGROUND

               OS9  is  an  Operating System for the TRS-80/Tandy Color Com-
            puters based on the 6809/6309 processors.  The open source  ver-
            sion  of  the  OS9 operating system is NitrOS-9 and is available
            at:

                The NitrOS-9 Project
                http://www.nitros9.org

            The s19os9 utility package contains the following:

               1)  OS9  definition files and an  OS9 assembler module
                   which creates the OS9 header, code and data areas,
                   and the module CRC block:

                        os9_mod.def       OS9 Module Definitions
                        os9_sys.def       OS9 Sytem  Definitions
                        os9_mod.asm       OS9 Module Begin / End Code

               2)  a program, s19os9, to post-process  assembled  OS9
                   modules from S19 format into  binary  OS9  modules
                   with the appropriate  header  checksum  and module
                   CRC values calculated.

               The  file os9_mod.def contains module definitions used in the
            header of OS9 binary files and was  derived  from  the  NitrOS-9
            file os9_mod.def.

               The  file  os9_sys.def contains system definitions pertaining
            to system service request codes, system reserved calls, I/O ser-
            vice  request  calls,  file  access modes, signal codes, get/put

            S19OS9 CONVERSION UTILITY                               PAGE C-2
            BACKGROUND

            status codes, module offsets, and error codes.   This  file  was
            derived from the NitrOS-9 file os9defs.a.

            C.2  CREATING AN OS9 MODULE

               This  section describes how to create an OS9 module using the
            files os9_mod.def, os9_sys.def, and os9_mod.asm.

               When  creating  an OS9 module certain parameters are required
            by the os9_mod.asm file to create the appropriate headers.   The
            list of supported parameters is listed here:

               Basic Header:

                   .define OS9_ModNam,     "Module_Name"
                   .define OS9_Typ,        "Type_Value"
                   .define OS9_Lng,        "Language_Value"
                   .define OS9_Att,        "Attributes_Value"
                   .define OS9_Rev,        "Revision_Value"

               General Parameters:
                   .define OS9_ModExe,     "Module Entry Point Offset"
                   .define OS9_ModMem,     "Module Permanent Storage"

               Device Driver Parameters:

                   .define OS9_Mod,        "Module Mode"

               Descriptor Parameters:

                   .define OS9_FMN,        "Device Driver Name Label"
                   .define OS9_DDR,        "Device Driver Name Label"
                   .define OS9_AbsAdr02,   "Device Absolute Address <23:16>"
                   .define OS9_AbsAdr01,   "Device Absolute Address <15:08>"
                   .define OS9_AbsAdr00,   "Device Absolute Address <07:00>"
                   .define OS9_Opt,        "Descriptor Option"
                   .define OS9_DType,      "Descriptor Data Type"

               The  OS9 Module file os9_mod.asm supports the creation of the
            following simple module types:

              SYSTM         -       System Module
              PRGRM         -       Program Module
              SBTRN         -       Subroutine Module
              DRIVR         -       Device Driver Module
              FLMGR         -       File Manager Module
              DEVIC         -       Device Descriptor Module

            S19OS9 CONVERSION UTILITY                               PAGE C-3
            CREATING AN OS9 MODULE

               The  following code shows the steps required when creating an
            OS9 program using the os9_mod.asm file.  os9_mod.asm  loads  the
            os9_mod.def  and  os9_sys.def files, defines the software inter-
            rupt macro os9, and creates  the  os9  program  header  and  crc
            blocks.

            C.2.1  Step 1:  Define Header Values

                    ;****
                    ; Step 1:
                    ; Use the .define assembler directive
                    ; to insert the parameters into the
                    ; os9_mod.asm's header structure.
                    ;
                    ;       Note:   See the file os9_mod.asm for
                    ;               parameter names and definitions.
                    ;
                    .title          List Program

                    .sbttl          Header Definitions

                    .define OS9_ModNam,     "LSTNAM"
                    .define OS9_Typ,        "PRGRM"
                    .define OS9_Lng,        "OBJCT"
                    .define OS9_Att,        "REENT"
                    .define OS9_Rev,        "1"
                    .define OS9_ModExe,     "LSTENT"
                    .define OS9_ModMem,     "LSTMEM"

            C.2.2  Step 2:  Create The Module Header

                    ; Step 2:
                    ; Set the symbol OS9_Module equal to 1
                    ; and .include the file os9_mod.asm.

                    OS9_Module = 1          ; OS9 Module Begin (==1)
            ;       .include        "os9_mod.asm"
                    .nlist
                    .include        "os9_mod.asm"
                    .list

               With  OS9_Module = 1  the following code is inserted into the
            code stream:

                    .define os9,    "swi2   .byte"  ; os9 macro

                    ; Include OS9 Definition Files
                    ; os9_sys.def Listing Disabled

            S19OS9 CONVERSION UTILITY                               PAGE C-4
            CREATING AN OS9 MODULE

                    .nlist
                    .include        "os9_sys.def"
                    .list
                    ; os9_mod.def Listing Disabled
                    .nlist
                    .include        "os9_mod.def"
                    .list

                    ; Define The OS9 Module Bank and Areas.
                    ;
                    ; Place the module program code in area OS9_Module
                    ; and the module data in area OS9_Data.
                    ;

                    .bank   OS9_Module      (BASE=0,FSFX=_OS9)
                    .area   OS9_Module      (REL,CON,BANK=OS9_Module)

                    .bank   OS9_Data        (BASE=0,FSFX=_DAT)
                    .area   OS9_Data        (REL,CON,BANK=OS9_Data)

                    .area   OS9_Module

                    OS9_ModBgn = .

                    .byte   OS9_ID0, OS9_ID1
                                    ; OS9 Module Sync Bytes
                    .word   OS9_ModEnd - OS9_ModBgn
                                    ; Length (Includes 3 CRC Bytes)
                    .word   OS9_ModNam - OS9_ModBgn
                                    ; Offset to Module Name String
                    .byte   OS9_Typ | OS9_Lng
                                    ; Type / Language
                    .byte   OS9_Att | OS9_Rev
                                    ; Attributes / Revision
                    .byte   0xFF
                                    ; Header Parity
                    .word   OS9_ModExe - OS9_ModBgn
                                    ; Execution Entry Offset
                    .word   OS9_ModMem
                                    ; Storage Requirement
                    ;       OS9_ModData
                                    ; Module Data

            S19OS9 CONVERSION UTILITY                               PAGE C-5
            CREATING AN OS9 MODULE

            C.2.3  Step 3:  Allocate Storage

               The  next  step  is to add the program data storage space for
            the program.  Note that the space is only allocated here and  no
            initialization is done.

                    ;*****-----*****-----*****-----*****-----*****-----*****
                    ;  LIST UTILITY COMMAND
                    ;  Syntax: list <pathname>
                    ;  COPIES INPUT FROM SPECIFIED FILE TO STANDARD OUTPUT

                    ; Step 3:
                    ; Allocate the storage in .area OS9_Data

                    .area   OS9_Data

                    ; STATIC STORAGE OFFSETS

                    BUFSIZ  .equ    200     ; size of input buffer

                    Base = .
            IPATH = . - Base
                    .rmb    1               ; input path number
            PRMPTR = . - Base
                    .rmb    2               ; parameter pointer
            BUFFER = . - Base
                    .rmb    BUFSIZ          ; allocate line buffer
                    .rmb    200             ; allocate stack
                    .rmb    200             ; room for parameter list
            LSTMEM = . - Base

            C.2.4  Step 4:  Insert The Program Code

               Once  the data storage space has been allocated then the pro-
            gram code is added to .area OS9_Module:

                    ; Step 4:
                    ; Insert the Module Code into .area OS9_Module

                    .area   OS9_Module

            LSTNAM: .strs   "List"          ; String with last byte
                                            ; or'd with 0x80
            LSTENT: stx     *PRMPTR         ; save parameter ptr
                    lda     #READ.          ; select read access mode
                    os9     I$OPEN          ; open input file
                    bcs     LIST50          ; exit if error
                    sta     *IPATH          ; save input path number
                    stx     *PRMPTR         ; save updated param ptr

            S19OS9 CONVERSION UTILITY                               PAGE C-6
            CREATING AN OS9 MODULE

            LIST20: lda     *IPATH          ; load input path number
                    leax    *BUFFER,U       ; load buffer pointer
                    ldy     #BUFSIZ         ; maximum bytes to read
                    os9     I$READLN        ; read line of input
                    bcs     LIST30          ; exit if error
                    lda     #1              ; load std. out. path #
                    os9     I$WRITLN        ; output line
                    bcc     LIST20          ; Repeat if no error
                    bra     LIST50          ; exit if error

            LIST30: cmpb    #E$EOF          ; at end of file?
                    bne     LIST50          ; branch if not
                    lda     *IPATH          ; load input path number
                    os9     I$CLOSE         ; close input path
                    bcs     LIST50          ; ..exit if error
                    ldx     *PRMPTR         ; restore parameter ptr
                    lda     ,X
                    cmpa    #0x0D           ; End of parameter line?
                    bne     LSTENT          ; ..no, list next file
                    clrb
            LIST50: os9     F$EXIT          ; ... terminate

            C.2.5  Step 5:  End Assembly By Inserting CRC

                    ; Step 5:
                    ; Set the symbol OS9_Module equal to 0
                    ; and .include the file os9_mod.asm.

                    OS9_Module = 0          ; OS9 Module End (==0)
            ;       .include        "os9_mod.asm"
                    .nlist
                    .include        "os9_mod.asm"
                    .list

                    .end

               With  OS9_Module = 0  the following code is the last code in-
            serted into the code stream:

                    .area   OS9_Module

                    ; The 3-Byte Module CRC
                    .byte   OS9_CRC0, OS9_CRC1, OS9_CRC2

                    OS9_ModEnd = .          ; End of OS9 Module

            S19OS9 CONVERSION UTILITY                               PAGE C-7
            THE CONVERSION UTILITY:  S19OS9

            C.3  THE CONVERSION UTILITY:  S19OS9

               Once you have assembled your module into an .S19 file use the
            program s19os9 to create the binary OS9 module file.

            The  program s19os9 is invoked from the command line:

                    s19os9 mod.s19 -o mod.bin

               where  mod.s19  is  the input S19 file and mod.bin is the OS9
            binary output file.

               The conversion utility s19os9 reads the .S19 file into an in-
            ternal buffer (48K bytes maximum).  As each line  is  read  from
            the  .S19  file  the  record length, address, data, and checksum
            values are processed checking for invalid characters and a valid
            checksum.

               After  the .S19 file has been loaded into the internal buffer
            the OS9 module is checked for correct length, and the OS9 Module
            ID,  OS9 Initial Header Checksum, and OS9 Initial Module CRC are
            verified.  After these parameters have been checked then the ac-
            tual  header  checksum  and module CRC values are calculated and
            replace the Initial Module Checksum and CRC values.  The  final-
            ized module is then written to the file mod.bin.

                                       APPENDIX D

                                       CHANGE LOG

            CHANGE LOG                                              Page D-2

               Summary  of  changes/additions  to the ASxxxx Assemblers from
            Version 4.11 to Version 5.00.

            2009_04_01 (Version 5.00)

               Added  a general purpose macro processor to the ASxxxx assem-
            blers with the following mnemonics:

                .macro      define a general macro
                .irp        define an indefinite repeat macro by arguments
                .irpc       define an indefinite repeat macro by characters
                .rept       define a repeating macro
                .mexit      exit to end of macro
                .endm       end of macro
                .nchr       assign number of characters to a symbol
                .narg       assign number of expansion arguments to a symbol
                .ntyp       assign 0/1 if argument is absolute/relocatable
                .nval       assign value of argument to an absolute symbol
                .mdelete    delete a macro definition

               The  following  additional  conditionals  provide  testing of
            string arguments most useful within macros:

                .ifb        if argument blank
                .ifnb       if argument not blank

                .ifidn      if arguments are identical
                .ifdif      if arguments are different

               Added  true (t), false (f), and true or false (tf) condition-
            als to the  .if / .else / .endif  construct.   The  conditionals
            .ift,  .iff,  and .iftf allow replacement of the .else directive
            making the .if / .endif construct more readable.

                .ift        if condition is true
                .iff        if condition is false
                .iftf       if condition is true or false

               An  alternate  .if  construction has been added to the ASxxxx
            assemblers:

                .if    eq,...       if argument == 0
                .if    ne,...       if argument != 0
                .if    lt,...       if argument <  0
                .if    ge,...       if argument >= 0
                .if    le,...       if argument <= 0
                .if    gt,...       if argument >  0

            CHANGE LOG                                              Page D-3

                .if    def,...      if argument is defined
                .if    ndef,...     if argument is not defined

                .if    b,...        if argument is blank
                .if    nb,...       if argument is not blank
                .if    idn,...,...  if arguments are the same
                .if    dif,...,...  if arguments are not the same

                .if    t            if condition is true
                .if    f            if condition is false
                .if    tf           if condition is true or false

               The  immediate  conditional statements have been added to the
            ASxxxx  assemblers.   These   conditionals   can   replace   the
            .if / ... / .endif construct for a single assembler source line:

            e.g.    .iifeq  arg     label:  .word   0x1234

                .iif        if argument != 0
                .iifeq      if argument == 0
                .iifne      if argument != 0
                .iiflt      if argument <  0
                .iifge      if argument >= 0
                .iifle      if argument <= 0
                .iifgt      if argument >  0

                .iifdef     if argument is defined
                .iifndef    if argument is not defined

                .iifb       if argument is blank
                .iifnb      if argument is not blank
                .iifidn     if arguments are the same
                .iifdif     if arguments are not the same

                .iift       if condition is true
                .iiff       if condition is false
                .iiftf      if condition is true or false

               The alternate immediate conditional statements have also been
            added to the ASxxxx assemblers:

            e.g.    .iif    eq,arg  label:  .word   0x1234

                .iif   eq,...       if argument == 0
                .iif   ne,...       if argument != 0
                .iif   lt,...       if argument <  0
                .iif   ge,...       if argument >= 0
                .iif   le,...       if argument <= 0
                .iif   gt,...       if argument >  0

            CHANGE LOG                                              Page D-4

                .iif   def,...      if argument is defined
                .iif   ndef,...     if argument is not defined

                .iif   b,...        if argument is blank
                .iif   nb,...       if argument is not blank
                .iif   idn,...,...  if arguments are the same
                .iif   dif,...,...  if arguments are not the same

                .iif    t           if condition is true
                .iif    f           if condition is false
                .iif    tf          if condition is true or false

               The  listing  options  for the ASxxxx assemblers has been up-
            dated to enable/disable any of the following parameters from be-
            ing output to a generated listing file:

                err         error codes
                loc         code location
                bin         assembler binary code
                eqt         symbolic equates / if evaluations
                cyc         machine cycles
                lin         assembler source line number
                src         assembler source code
                pag         paging control
                lst         listing of .list / .nlist
                md          macro definition
                me          macro expansion
                meb         macro expansion binary code

                !           sets the listing mode to
                            !(.list) or !(.nlist) before
                            applying the sublist options

            e.g.    .nlist  (lst,pag)       ; disable .list/.nlist listing
                                            ; and pagination

               The  NOT parameter, !, is used to set the listing mode to the
            opposite sense of the .list or .nlist directive.  For example:

                .nlist (!)  is equivalent to .list and
                .list  (!)  is equivalent to .nlist

            To enable listing and simultaneously disable the cycle count use
            the directive:

                .nlist  (!,cyc)

            or  if  you  wish  to suppress the listing of the .list / .nlist
            directives:

            CHANGE LOG                                              Page D-5

                .nlist              ; disables all listing
                .nlist  (!,lst)     ; enables  all listing except
                                    : .list (...) and .nlist

               Normally  the  .list  and .nlist directives are not evaluated
            when encountered within a FALSE conditional block.  This default
            behavior  can  be  modified by specifying a non zero argument in
            the .list or .nlist directive:

                .nlist   1,(!,lst)  ; enables listing even within
                                    ; a FALSE conditional block

               The .bndry assembler directive has been added to ASxxxx.  The
            .bndry directive changes the  current  location  address  to  be
            evenly divisible by a specified integer value.

            e.g.    .org    0
                    .bndry  4
                    ; . == 0

                    .org    1
                    .bndry  4
                    ; . == 4

            2009_02
               Added the Cypress PSoc (M8C) ASM8C assembler
               to ASxxxx.

            2008_09
               Added the 8048 (8021, 8022, and 8041) AS8048
               assembler to Asxxxx.

            2008_02
               Added the SC/MP ASSCMP assembler to ASxxxx.

            CHANGE LOG                                              Page D-6

            2008_02_03 (Version 4.11 Update 4)

               An update to the AS2650 assembler to
               fix the following errors:

               1)  The indexed addressing mode generates invalid
                   code by using the first argument register as
                   the index register: (addr = 0x1234)

                       loda    r0,[addr,r1]          0C F2 34
                               this should give      0D F2 34

               2)  The index addressing mode did not generate
                   an addressing error when the first argument
                   register was not r0:

                       stra    r1,[addr,r2]  should give an 'a'
                               error, the source must be r0

                       loda    r2,[addr,r3]  should give an 'a'
                               error, the destination must be r0

               3)  The S2650 auto increment and decrement indexing
                   modes always perform the register update before
                   the register is used. i.e. +Rn or -Rn.  The
                   assembler now accepts +Rn or Rn+ as meaning
                   pre-increment and -Rn or Rn- as meaning
                   pre-decrement.

               The AS2650 assembler tstscn files have been updated
               for testing the assemblers.

            2007_10_21 (Version 4.11 Fix)

               In the AS6816 assembler the instruction ANDP gives
               wrong object code. Changed from 37 2A  to  37 3A.

            CHANGE LOG                                              Page D-7

            2007_04_01 (Version 4.11 Update 3)

               An update to the ASPIC assembler and
               associated fix to ASLINK:

               1)  Change the pic addressing to lo/hi from hi/lo
                   byte ordering.

               2)  The update fixes an error in the pic17 series
                   LCALL instruction.

               3)  A rewrite of the pic18 series assembler to change
                   the PC addressing from 1 per 16-bit word to 1 per
                   8-bit byte and add the extended instruction set.

               4)  Modify the Linker Merge Mode processing to take into
                   account the discarded low order bits for PC Relative
                   Addressing.

               5)  New  tstscn files for testing the assemblers.

            2006_11_01 (Version 4.11 Optional Update 2)

               1)  OS9  definition files and an  OS9 assembler module
                   which creates the OS9 header, code and data areas,
                   and the module CRC block:

                        os9_mod.def       OS9 Module Definitions
                        os9_sys.def       OS9 Sytem  Definitions
                        os9_mod.asm       OS9 Module Begin / End Code

               2)  a program, s19os9, to post-process  assembled  OS9
                   modules in  S19  format into  binary  OS9  modules
                   with the appropriate  header  checksum  and module
                   CRC values calculated.

               3)  new  make  and  project files which may be used to
                   compile the s19os9 program.

            CHANGE LOG                                              Page D-8

            2006_11_01 (Version 4.11 Optional Update 01)

               The .list  and  .nlist  directives  are  now  modified
               by .if / .else / .endif  processing  so  that they are
               active only in a TRUE clause.

               The  .page  and  .include  directives are now modified
               by the .list and .nlist  directives so that pagination
               occurs only when listing is active.

               The new  default functionality for the  .list,  .nlist
               and .page directives may  be  modified by including an
               optional argument  in the  directive as shown here for
               the the .list directive:

                  .list    arg

               a non-zero argument invokes the directive irrespective
               of the .if / .else / .endif status.

            2006_07_26 (Version 4.11 Patch 01)

               The  assembly  of  a  direct  page  instruction with a
               numeric  constant  causes a program  crash when a .rel
               file is created. e.g.:

                    andb    *0x02

               The  use  of  a  symbolic  constant  or  symbol plus a
               a constant compiles normally.

                    val = 0x02

                    andb    *val
                    andb    *extern+0x01

               The assemblers effected are:

                    as6809
                    as6812
                    ash8
                    aspic

            CHANGE LOG                                              Page D-9

               Summary  of  changes/additions  to the ASxxxx Assemblers from
            Version 4.10 to Version 4.11.

                 1.  Incorporated  the patches contained in p01410.zip which
                     corrected a coding error that affected BANKS containing
                     multiple ABS areas or mixed AREA types.

                 2.  Incorporated  the patches contained in p02410.zip which
                     corrected improper use of  R_USGN  in  most  addressing
                     modes  in AS6500.  This caused unexpected 'a' errors in
                     V4.xx because of the ASxxxx core change to  32-bit  in-
                     tegers and arithmetic.

                 3.  Incorporated  the patches contained in p03410.zip which
                     corrected errors in the  .local  and  .globl  assembler
                     directive  processing  routine that introduced unwanted
                     side effects for variable and symbol definition  files.
                     These  effects included improper definitions and incor-
                     rect error warnings.

                 4.  The  following  new subdirectories and their files have
                     been added to the asxtst directory:

                      *  areabank     Area and Bank Processing Test
                         This  directory  contains  several  test  programs:
                         ts.asm (single file - multiple areas), tm1.asm  and
                         tm2.asm  (multiple  file  -  multiple  areas),  and
                         tbm.asm, tbm1.asm, and tbm2.asm ( multiple  file  -
                         multiple  areas  within  a  bank) and several other
                         files which verify the  correct  operation  of  the
                         linker  when used with a single linked file, multi-
                         ple linked files having no  banking,  and  multiple
                         linked  files  with banking.  These reference files
                         show in detail how the .area and  .bank  directives
                         work together.

                      *  equtst       Equate Processing Test
                         This  directory  contains a test file for verifying
                         the operation of the .globl, .local, .equ, .gblequ,
                         and  .lclequ  directives  and  the  =,  ==,  and =:
                         equalities.

                      *  inctst       Nested Include File Test

                      *  itst         Include File Error Reporting Test

                 5.  Incorporated  the updates contained in u01410.zip which
                     added 10 undocumented 8085 instructions to  the  AS8085
                     assembler.

            CHANGE LOG                                             Page D-10

               Summary  of  changes/additions  to the ASxxxx Assemblers from
            Version 4.00 to Version 4.10.

                 1.  Added new assemblers for the Zilog EZ80, Zilog Z8, Sig-
                     netics 2650, and Fujitsu F2MC8(L,FX) processors.

                 2.  Added the processor cycle count option (-c) to all pro-
                     cessors.

                 3.  Several   of  the  assemblers  (ASZ80,  ASRAB,  AS6805,
                     AS6808, AS6812, ASF2MC8, ...) now  support  subsets  or
                     supersets  of  their basic opcodes by the use of assem-
                     bler specific directives.

                 4.  Added .ifeq, .ifne, .iflt, .ifgt, .ifle, and .ifge con-
                     ditional assembly directives.

                 5.  Added  support  for the Tandy Color Computer Disc Basic
                     binary file format to ASLINK.

                 6.  Updated the assembler and linker source code to support
                     16-Bit and 32-Bit compilers.  Tested with Borland Turbo
                     C++  3.0  and  Symantec 7.2 C/C++ 16-Bit compilers, and
                     with Visual C++ 6.0, Cygwin, DJGPP  V02.03,  and  Linux
                     32-Bit compilers.

                 7.  Problem:
                     When  an area size is equal to the 'address space size'
                     the size parameter is reported as 0.  (A normal  condi-
                     tion  caused  by  address rollover to 0.) Aslink inter-
                     preted this as a 0 size.

                     Fix:
                     A  new area 'Output Code Flag' bit was defined to indi-
                     cate when data is  defined  in  an  area.   ASxxxx  and
                     Aslink  have  been updated to set and process this area
                     flag bit.

                 8.  Problem:
                     The  use  of  the .end assembler directive in an Asxxxx
                     assembler would cause Aslink  to  output  the  optional
                     start address in all output files.

                     Fix:
                     Updated  Aslink  to  output  the optional start address
                     only in the output file associated with  the  area/bank
                     containing the .end directive.

            CHANGE LOG                                             Page D-11

                 9.  Problem:
                     Aslink  creates  output  files for banks with no output
                     data.

                     Fix:
                     Aslink  now  deletes  any created output file for banks
                     with no data.

                10.  Incorporated  the  patches  contained in p01400.zip for
                     files t1802.asm and 1802pst.c to correct for  an  error
                     in  the  opcodes  generated  for  the  BM,  BL, and BNF
                     mnemonics.

                11.  Incorporated  the  patches  contained in p02400.zip for
                     file ds8adr.c to correct for an  error  in  the  direct
                     page addressing mode of AS8xCxxx.

                12.  Incorporated  the  patches  contained in p03400.zip for
                     file rabmch.c to correct for an error in the processing
                     of the "ret cc" instruction.

                13.  Made many corrections to internal code comments.

                                       APPENDIX AA

                                    ASCHECK ASSEMBLER

               The  ASxxxx assembler ASCHECK is used to test the machine in-
            dependent features of the ASxxxx assemblers.  The  source  files
            for  the ASCHECK assembler are also useful as a template for the
            development of a new ASxxxx assembler.

               The  ASCHECK  assembler has all the ASxxxx directives enabled
            for testing all features of the assemblers.

            AA.1  .opcode DIRECTIVE

            Format:

                    .opcode    n

            The  .opcode  directive creates a single byte of code having the
            value n and having cycle counts defined in the following table:

            /*--*--* 0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F */
            /*--*--* -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - */
            /*00*/   0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
            /*10*/  UN, 1,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,
            /*20*/  UN,UN, 2,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,
            /*30*/  UN,UN,UN, 3,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,
            /*40*/  UN,UN,UN,UN, 4,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,
            /*50*/  UN,UN,UN,UN,UN, 5,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,
            /*60*/  UN,UN,UN,UN,UN,UN, 6,UN,UN,UN,UN,UN,UN,UN,UN,UN,
            /*70*/  UN,UN,UN,UN,UN,UN,UN, 7,UN,UN,UN,UN,UN,UN,UN,UN,
            /*80*/  UN,UN,UN,UN,UN,UN,UN,UN, 8,UN,UN,UN,UN,UN,UN,UN,
            /*90*/  UN,UN,UN,UN,UN,UN,UN,UN,UN, 9,UN,UN,UN,UN,UN,UN,
            /*A0*/  UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,10,UN,UN,UN,UN,UN,
            /*B0*/  UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,11,UN,UN,UN,UN,
            /*C0*/  UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,12,UN,UN,UN,
            /*D0*/  UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,13,UN,UN,
            /*E0*/  UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,14,UN,
            /*F0*/  UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,UN,15

            ASCHECK ASSEMBLER                                      PAGE AA-2
            .opcode DIRECTIVE

            The  UN symbols indicate 'undefined cycles' where no cycle count
            will be output.

                                       APPENDIX AB

                                    AS1802 ASSEMBLER

            AB.1  ACKNOWLEDGMENT

               Thanks  to  Shujen  Chen  for  his contribution of the AS1802
            cross assembler.

                    Shujen Chen
                    DeVry University
                    Tinley Park, IL
                    schen at tp dot devry dot edu

            AB.2  1802 REGISTER SET

            The following is a list of the 1802 registers used by AS1802:

                    r0-r15  -       8-bit registers
                    sp      -       register r2
                    pc      -       register r3
                    call    -       register r4
                    return  -       register r5
                    argr    -       register r6

            AB.3  1802 INSTRUCTION SET

               The  following  tables  list all 1802 mnemonics recognized by
            the AS1802 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by AS1802:

                    #data           immediate data
                                    byte or word data

                    expr            expression

            AS1802 ASSEMBLER                                       PAGE AB-2
            1802 INSTRUCTION SET

                    Rn              register addressing

                    label           branch label

            The terms data, expr, and label may be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 1802 technical data for valid modes.

            AB.3.1  1802 Inherent Instructions

                    adc             add             and
                    dis             idl             irx
                    ldx             ldxa            lsdf
                    lsie            lskp            lsnf
                    lsnq            lsnz            lsq
                    lsz             mark            nop
                    or              req             ret
                    rshl            rshr            sav
                    sd              sdb             seq
                    shl             shlc            shr
                    shrc            skp             sm
                    smb             stxd            xor

            AB.3.2  1802 Short Branch Instructions

                    b1      label           b2      label
                    b3      label           b4      label
                    bdf     label           bge     label
                    bl      label           bm      label
                    bn1     label           bn2     label
                    bn3     label           bn4     label
                    bnf     label           bnq     label
                    bnz     label           bpz     label
                    bq      label           br      label
                    bz      label           nbr     label

            AS1802 ASSEMBLER                                       PAGE AB-3
            1802 INSTRUCTION SET

            AB.3.3  1802 Long Branch Instructions

                    lbdf    label           lbnf    label
                    lbnq    label           lbnz    label
                    lbq     label           lbr     label
                    lbz     label           nlbr    label

            AB.3.4  1802 Immediate Instructions

                    adci    #data           adi     #data
                    ani     #data           ldi     #data
                    ori     #data           sdbi    #data
                    sdi     #data           smbi    #data
                    smi     #data           xri     #data

            AB.3.5  1802 Register Instructions

                    dec     Rn              ghi     Rn
                    glo     Rn              inc     Rn
                    lda     Rn              ldn     Rn
                    phi     Rn              plo     Rn
                    sep     Rn              sex     Rn
                    str     Rn

            AB.3.6  1802 Input and Output Instructions

                    inp     expr
                    out     expr

            AS1802 ASSEMBLER                                       PAGE AB-4
            1802 INSTRUCTION SET

            AB.3.7  CDP1802 COSMAC Microprocessor Instruction Set Summary

            ----------------------------------------------------------------
            |                                                              |
            |                                                              |
            |                             RCA                              |
            |                                                              |
            |               1     88888      000      22222                |
            |              11    8     8    0   0    2     2               |
            |               1    8     8   0   0 0        2                |
            |               1     88888    0  0  0     222                 |
            |               1    8     8   0 0   0    2                    |
            |               1    8     8    0   0    2                     |
            |              111    88888      000     2222222               |
            |                                                              |
            |    CDP1802 COSMAC Microprocessor Instruction Set Summary     |
            |                                                              |
            |                                                              |
            |                                                              |
            |                                                              |
            |Written by     Jonathan Bowen                                 |
            |               Programming Research Group                     |
            |               Oxford University Computing Laboratory         |
            |               8-11 Keble Road                                |
            |               Oxford OX1 3QD                                 |
            |               England                                        |
            |                                                              |
            |               Tel +44-865-273840                             |
            |                                                              |
            |Created        August 1981                                    |
            |Updated        April 1985                                     |
            |Issue          1.3                Copyright (C) J.P.Bowen 1985|
            ----------------------------------------------------------------

            AS1802 ASSEMBLER                                       PAGE AB-5
            1802 INSTRUCTION SET

            ----------------------------------------------------------------
            |                                                              |
            |             CDP1802 COSMAC Microprocessor Pinout             |
            |                                                              |
            |                    _________    _________                    |
            |                  _|         \__/         |_                  |
            |       --> CLOCK |_|1                   40|_| Vdd             |
            |            ____  _|                      |_  ____            |
            |        --> WAIT |_|2                   39|_| XTAL -->        |
            |           _____  _|                      |_  ______          |
            |       --> CLEAR |_|3                   38|_| DMA IN <--      |
            |                  _|                      |_  _______         |
            |           <-- Q |_|4                   37|_| DMA OUT <--     |
            |                  _|                      |_  _________       |
            |         <-- SC1 |_|5                   36|_| INTERRUPT <--   |
            |                  _|                      |_  ___             |
            |         <-- SC0 |_|6                   35|_| MWR <--         |
            |             ___  _|                      |_                  |
            |         <-- MRD |_|7                   34|_| TPA -->         |
            |                  _|                      |_                  |
            |      <--> BUS 7 |_|8                   33|_| TPB -->         |
            |                  _|                      |_                  |
            |      <--> BUS 6 |_|9                   32|_| MA7 -->         |
            |                  _|                      |_                  |
            |      <--> BUS 5 |_|10       1802       31|_| MA6 -->         |
            |                  _|                      |_                  |
            |      <--> BUS 4 |_|11                  30|_| MA5 -->         |
            |                  _|                      |_                  |
            |      <--> BUS 3 |_|12                  29|_| MA4 -->         |
            |                  _|                      |_                  |
            |      <--> BUS 2 |_|13                  28|_| MA3 -->         |
            |                  _|                      |_                  |
            |      <--> BUS 1 |_|14                  27|_| MA2 -->         |
            |                  _|                      |_                  |
            |      <--> BUS 0 |_|15                  26|_| MA1 -->         |
            |                  _|                      |_                  |
            |             Vcc |_|16                  25|_| MA0 -->         |
            |                  _|                      |_  ___             |
            |          <-- N2 |_|17                  24|_| EF1 <--         |
            |                  _|                      |_  ___             |
            |          <-- N1 |_|18                  23|_| EF2 <--         |
            |                  _|                      |_  ___             |
            |          <-- N0 |_|19                  22|_| EF3 <--         |
            |                  _|                      |_  ___             |
            |             Vss |_|20                  21|_| EF4 <--         |
            |                   |______________________|                   |
            |                                                              |
            |                                                              |
            ----------------------------------------------------------------

            AS1802 ASSEMBLER                                       PAGE AB-6
            1802 INSTRUCTION SET

            ----------------------------------------------------------------
            |Mnem. |Op|F|Description                 |Notes                |
            |------+--+-+----------------------------+---------------------|
            |ADC   |74|*|Add with Carry              |{DF,D}=mx+D+DF       |
            |ADCI i|7C|*|Add with Carry Immediate    |{DF,D}=mp+D+DF,p=p+1 |
            |ADD   |F4|*|Add                         |{DF,D}=mx+D          |
            |ADI  i|FC|*|Add Immediate               |{DF,D}=mp+D,p=p+1    |
            |AND   |F2|*|Logical AND                 |D={mx}&D             |
            |ANI  i|FA|*|Logical AND Immediate       |D={mp}&D,p=p+1       |
            |B1   a|34|-|Branch if EF1               |If EF1=1 BR else NBR |
            |B2   a|35|-|Branch if EF2               |If EF2=1 BR else NBR |
            |B3   a|36|-|Branch if EF3               |If EF3=1 BR else NBR |
            |B4   a|37|-|Branch if EF4               |If EF4=1 BR else NBR |
            |BDF  a|33|-|Branch if DF                |If DF=1 BR else NBR  |
            |BGE  a|33|-|Branch if Greater or Equal  |See BDF              |
            |BL   a|38|-|Branch if Less              |See BNF BR else NBR  |
            |BM   a|38|-|Branch if Minus             |See BNF              |
            |BN1  a|3C|-|Branch if Not EF1           |If EF1=0 BR else NBR |
            |BN2  a|3D|-|Branch if Not EF2           |If EF2=0 BR else NBR |
            |BN3  a|3E|-|Branch if Not EF3           |If EF3=0 BR else NBR |
            |BN4  a|3F|-|Branch if Not EF4           |If EF4=0 BR else NBR |
            |BNF  a|38|-|Branch if Not DF            |If DF=0 BR else NBR  |
            |BNQ  a|39|-|Branch if Not Q             |If Q=0 BR else NBR   |
            |BNZ  a|3A|-|Branch if D Not Zero        |If D=1 BR else NBR   |
            |BPZ  a|33|-|Branch if Positive or Zero  |See BDF              |
            |BQ   a|31|-|Branch if Q                 |If Q=1 BR else NBR   |
            |BR   a|30|-|Branch                      |pl=mp                |
            |BZ   a|32|-|Branch if D Zero            |If D=0 BR else NBR   |
            |DEC  r|2N|-|Decrement register N        |n=n-1                |
            |DIS   |71|-|Disable                     |{X,P}=mx,x=x+1,IE=0  |
            |GHI  r|9N|-|Get High register N         |D=nh                 |
            |GLO  r|8N|-|Get Low register N          |D=nl                 |
            |IDL   |00|-|Idle (wait for DMA or int.) |Bus=m0               |
            |INC  r|1N|-|Increment register N        |n=n+1                |
            |INP  d|6N|-|Input (N=d+8=9-F)           |mx=Bus,D=Bus,Nlines=d|
            |IRX   |60|-|Increment register X        |x=x+1                |
            |LBDF a|C3|-|Long Branch if DF           |If DF=1 LBR else LNBR|
            |LBNF a|C8|-|Long Branch if Not DF       |If DF=0 LBR else LNBR|
            |LBNQ a|C9|-|Long Branch if Not Q        |If Q=0 LBR else LNBR |
            |LBNZ a|CA|-|Long Branch if D Not Zero   |If D=1 LBR else LNBR |
            |LBQ  a|C1|-|Long Branch if Q            |If Q=1 LBR else LNBR |
            |LBR  a|C0|-|Long Branch                 |p=mp                 |
            |LBZ  a|C2|-|Long Branch if D Zero       |If D=0 LBR else LNBR |
            |LDA  r|4N|-|Load advance                |D=mn,n=n+1           |
            |LDI  i|F8|-|Load Immediate              |D=mp,p=p+1           |
            |LDN  r|0N|-|Load via N (except N=0)     |D=mn                 |
            |LDX   |F0|-|Load via X                  |D=mx                 |
            |LDXA  |72|-|Load via X and Advance      |D=mx,x=x+1           |
            |LSDF  |CF|-|Long Skip if DF             |If DF=1 LSKP else NOP|
            ----------------------------------------------------------------

            AS1802 ASSEMBLER                                       PAGE AB-7
            1802 INSTRUCTION SET

            ----------------------------------------------------------------
            |Mnem. |Op|F|Description                 |Notes                |
            |------+--+-+----------------------------+---------------------|
            |LSIE  |CC|-|Long Skip if IE             |If IE=1 LSKP else NOP|
            |LSKP  |C8|-|Long Skip                   |See NLBR             |
            |LSNF  |C7|-|Long Skip if Not DF         |If DF=0 LSKP else NOP|
            |LSNQ  |C5|-|Long Skip if Not Q          |If Q=0 LSKP else NOP |
            |LSNZ  |C6|-|Long Skip if D Not Zero     |If D=1 LSKP else NOP |
            |LSQ   |CD|-|Long Skip if Q              |If Q=1 LSKP else NOP |
            |LSZ   |CE|-|Long Skip if D Zero         |If D=0 LSKP else NOP |
            |MARK  |79|-|Push X,P to stack  (T={X,P})|m2={X,P},X=P,r2=r2-1 |
            |NBR   |38|-|No short Branch (see SKP)   |p=p+1                |
            |NLBR a|C8|-|No Long Branch (see LSKP)   |p=p+2                |
            |NOP   |C4|-|No Operation                |Continue             |
            |OR    |F1|*|Logical OR                  |D={mx}vD             |
            |ORI  i|F9|*|Logical OR Immediate        |D={mp}vD,p=p+1       |
            |OUT  d|6N|-|Output (N=d=1-7)            |Bus=mx,x=x+1,Nlines=d|
            |PLO  r|AN|-|Put Low register N          |nl=D                 |
            |PHI  r|BN|-|Put High register N         |nh=D                 |
            |REQ   |7A|-|Reset Q                     |Q=0                  |
            |RET   |70|-|Return                      |{X,P}=mx,x=x+1,IE=1  |
            |RSHL  |7E|*|Ring Shift Left             |See SHLC             |
            |RSHR  |76|*|Ring Shift Right            |See SHRC             |
            |SAV   |78|-|Save                        |mx=T                 |
            |SDB   |75|*|Subtract D with Borrow      |{DF,D}=mx-D-DF       |
            |SDBI i|7D|*|Subtract D with Borrow Imm. |{DF,D}=mp-D-DF,p=p+1 |
            |SD    |F5|*|Subtract D                  |{DF,D}=mx-D          |
            |SDI  i|FD|*|Subtract D Immediate        |{DF,D}=mp-D,p=p+1    |
            |SEP  r|DN|-|Set P                       |P=N                  |
            |SEQ   |7B|-|Set Q                       |Q=1                  |
            |SEX  r|EN|-|Set X                       |X=N                  |
            |SHL   |FE|*|Shift Left                  |{DF,D}={DF,D,0}<-    |
            |SHLC  |7E|*|Shift Left with Carry       |{DF,D}={DF,D}<-      |
            |SHR   |F6|*|Shift Right                 |{D,DF}=->{0,D,DF}    |
            |SHRC  |76|*|Shift Right with Carry      |{D,DF}=->{D,DF}      |
            |SKP   |38|-|Short Skip                  |See NBR              |
            |SMB   |77|*|Subtract Memory with Borrow |{DF,D}=D-mx-{~DF}    |
            |SMBI i|7F|*|Subtract Mem with Borrow Imm|{DF,D}=D-mp-~DF,p=p+1|
            |SM    |F7|*|Subtract Memory             |{DF,D}=D-mx          |
            |SMI  i|FF|*|Subtract Memory Immediate   |{DF,D}=D-mp,p=p+1    |
            |STR  r|5N|-|Store via N                 |mn=D                 |
            |STXD  |73|-|Store via X and Decrement   |mx=D,x=x-1           |
            |XOR   |F3|*|Logical Exclusive OR        |D={mx}.D             |
            |XRI  i|FB|*|Logical Exclusive OR Imm.   |D={mp}.D,p=p+1       |
            |      |  |-|Interrupt action            |T={X,P},P=1,X=2,IE=0 |
            |------+--+-+--------------------------------------------------|
            |      |??| |8-bit hexadecimal opcode                          |
            |      |?N| |Opcode with register/device in low 4/3 bits       |
            |      |  |-|DF flag unaffected                                |
            |      |  |*|DF flag affected                                  |
            ----------------------------------------------------------------

            AS1802 ASSEMBLER                                       PAGE AB-8
            1802 INSTRUCTION SET

            ----------------------------------------------------------------
            |Arguments  |                     Notes                        |
            |-----------+--------------------------------------------------|
            | mn        |Register addressing                               |
            | mx        |Register-indirect addressing                      |
            | mp        |Immediate addressing                              |
            | R( )      |Stack addressing (implied addressing)             |
            |-----------+--------------------------------------------------|
            | D         |Data register (accumulator, 8-bit)                |
            | DF        |Data Flag (ALU carry, 1-bit)                      |
            | I         |High-order instruction digit (4-bit)              |
            | IE        |Interrupt Enable (1-bit)                          |
            | N         |Low-order instruction digit (4-bit)               |
            | P         |Designates Program Counter register (4-bit)       |
            | Q         |Output flip-flop (1-bit)                          |
            | R         |1 of 16 scratchpad Registers(16-bit)              |
            | T         |Holds old {X,P} after interrupt (X high, 8-bit)   |
            | X         |Designates Data Pointer register (4-bit)          |
            |-----------+--------------------------------------------------|
            | mn        |Memory byte addressed by R(N)                     |
            | mp        |Memory byte addressed by R(P)                     |
            | mx        |Memory byte addressed by R(X)                     |
            | m?        |Memory byte addressed by R(?)                     |
            | n         |Short form for R(N)                               |
            | nh        |High-order byte of R(N)                           |
            | nl        |Low-order byte of R(N)                            |
            | p         |Short form for R(P)                               |
            | pl        |Low-order byte of R(P)                            |
            | r?        |Short form for R(?)                               |
            | x         |Short form for R(X)                               |
            |-----------+--------------------------------------------------|
            | R(N)      |Register specified by N                           |
            | R(P)      |Current program counter                           |
            | R(X)      |Current data pointer                              |
            | R(?)      |Specific register                                 |
            ----------------------------------------------------------------

            AS1802 ASSEMBLER                                       PAGE AB-9
            1802 INSTRUCTION SET

            ----------------------------------------------------------------
            |Arguments  |                     Notes                        |
            |-----------+--------------------------------------------------|
            | a         |Address expression                                |
            | d         |Device number (1-7)                               |
            | i         |Immediate expression                              |
            | n         |Expression                                        |
            | r         |Register (hex digit or an R followed by hex digit)|
            |-----------+--------------------------------------------------|
            | +         |Arithmetic addition                               |
            | -         |Arithmetic subtraction                            |
            | *         |Arithmetic multiplication                         |
            | /         |Arithmetic division                               |
            | &         |Logical AND                                       |
            | ~         |Logical NOT                                       |
            | v         |Logical inclusive OR                              |
            | .         |Logical exclusive OR                              |
            | <-        |Rotate left                                       |
            | ->        |Rotate right                                      |
            | { }       |Combination of operands                           |
            | ?         |Hexadecimal digit (0-F)                           |
            | -->       |Input pin                                         |
            | <--       |Output pin                                        |
            | <-->      |Input/output pin                                  |
            ----------------------------------------------------------------

                                       APPENDIX AC

                                    AS2650 ASSEMBLER

            AC.1  2650 REGISTER SET

            The following is a list of the 2650 registers used by AS2650:

                    r0,r1   -       8-bit accumulators
                    r2,r3

            AC.2  2650 INSTRUCTION SET

               The  following  tables  list all 2650 mnemonics recognized by
            the AS2650 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The designation CC refers to a re-
            quired condition code argument:   .eq.,  .gt.,  .lt.,  .un.,  or
            value  of 0-3.  The following list specifies the format for each
            addressing mode supported by AS2650:

                    #data           immediate byte data

                    r0,r1,r2,r3     registers

                    addr            location/branch address

                    [addr]     or   indirect addressing
                    @addr

                    [addr,r0]  or   register indexed
                    @addr,r0        indirect addressing

                    [addr,-r0] or   autodecrement register indexed
                    @addr,-r0       indirect addressing

                    [addr,r0+] or   autoincrement register indexed
                    @addr,r0+       indirect addressing

            AS2650 ASSEMBLER                                       PAGE AC-2
            2650 INSTRUCTION SET

                    .eq.            CC: equal               (== 0)
                    .gt.            CC: greater than        (== 1)
                    .lt.            CC: less than           (== 2)
                    .un.            CC: unconditional       (== 3)

            The terms data, label, and addr may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 2650 technical data for valid modes.

            AC.2.1  Load / Store Instructions

                    lodz    r               lodi    #data
                    lodr    []              loda    []

                    stoz    r
                    stor    []              stoa    []

            AC.2.2  Arithmetic / Compare Instructions

                    addz    r               addi    #data
                    addr    []              adda    []

                    subz    r               subi    #data
                    subr    []              suba    []

                    comz    r               comi    #data
                    comr    []              coma    []

                    dar     r

            AC.2.3  Logical / Rotate Instructions

                    andz    r               andi    #data
                    andr    []              anda    []

                    iorz    r               iori    #data
                    iorr    []              iora    []

                    eorz    r               eori    #data
                    eorr    []              eora    []

                    rrr     r
                    rrl     r

            AS2650 ASSEMBLER                                       PAGE AC-3
            2650 INSTRUCTION SET

            AC.2.4  Condition Code Branches

                    bctr    CC,[]           bcta    CC,[]

                    bcfr    CC,[]           bcfa    CC,[]

                    bstr    CC,[]           bsta    CC,[]

                    bsfr    CC,[]           bsta    CC,[]

            AC.2.5  Register Test Branches

                    brnr    r,[]            brna    r,[]

                    birr    r,[]            bira    r,[]

                    bdrr    r,[]            bdra    r,[]

                    bsnr    r,[]            bsna    r,[]

            AC.2.6  Branches (to Subroutines) / Returns

                    bxa     []              bsxa    []

                    zbrr    []              zbsr    []

                    retc    CC              rete    CC

            AC.2.7  Input / Output

                    redc    r               wrtc    r
                    redd    r               wrtd    r
                    rede    r,addr          wrte    r,addr

            AC.2.8  Miscellaneos

                    halt                    nop
                    tmi     r,#data

            AS2650 ASSEMBLER                                       PAGE AC-4
            2650 INSTRUCTION SET

            AC.2.9  Program Status

                    lpsl                    lpsu
                    spsl                    spsu
                    cpsl    #data           cpsu    #data
                    ppsl    #data           ppsu    #data
                    tpsl    #data           tpsu    #data

                                       APPENDIX AD

                                     AS430 ASSEMBLER

            AD.1  MPS430 REGISTER SET

            The following is a list of the MPS430 registers used by AS430:

            Sixteen 16-bit registers provide adddress, data, and
            special functions:
                    pc  /   r0      -       program counter
                    sp  /   r1      -       stack pointer
                    sr  /   r2      -       status register
                    cg1 /   r2      -       constant generator 1
                    cg2 /   r3      -       constant generator 2
                            r4      -       working register r4
                            r5      -       working register r5
                            ...
                            r14     -       working register r14
                            r15     -       working register r15

            AS430 ASSEMBLER                                        PAGE AD-2
            MPS430 REGISTER SET

            AD.2  MPS430 ADDRESSING MODES

            The following list specifies the format for each addressing mode
            supported by AS430:

            Source/Destination Operand Addressing Modes
            As/Ad   Addressing Mode Syntax  Description
            -----   --------------- ------  -----------
            00/0    Register mode   Rn      Register contents are operand.
            01/1    Indexed mode    X(Rn)   (Rn + X) points to the operand,
                                            X is stored in the next word.
            01/1    Symbolic mode   ADDR    (PC + X) points to the operand,
                                            X is stored in the next word,
                                            Indexed mode X(PC) is used.
            01/1    Absolute mode   &ADDR   The word following the
                                            instruction, contains the
                                            absolute address.
            10/-    Indirect        @Rn     Rn is used as a pointer to the
                    register mode           operand.
            11/-    Indirect        @Rn+    Rn is used as a pointer to the
                    autoincrement           operand. Rn is incremented
                                            afterwards.
            11/-    Immediate mode  #N      The word following the
                                            instruction contains the
                                            immediate constant N. Indirect
                                            autoincrement mode @PC+ is used.

            The  terms  ADDR, X and N may all be expressions.  Note that not
            all addressing modes are valid with every instruction, refer  to
            the MPS430 technical data for valid modes.

            AS430 ASSEMBLER                                        PAGE AD-3
            MPS430 ADDRESSING MODES

            AD.2.1  MPS430 Instruction Mnemonics

            The following table lists all MPS430 family mnemonics recognized
            by the AS430 assembler.  The designations src and dst  refer  to
            required source and/or destination addressing mode arguments.

            * ADC[.W];ADC.B  dst        dst + C -> dst
              ADD[.W];ADD.B  src,dst    src + dst -> dst
              ADDC[.W];ADDC.B           src,dst src + dst + C -> dst
              AND[.W];AND.B  src,dst    src .and. dst -> dst
              BIC[.W];BIC.B src,dst     .not.src .and. dst -> dst
              BIS[.W];BIS.B src,dst     src .or. dst -> dst
              BIT[.W];BIT.B src,dst     src .and. dst
            * BR dst                Branch to .......
            * BRANCH dst            Branch to .......
              CALL dst              PC+2 -> stack, dst -> PC
            * CLR[.W];CLR.B dst     Clear destination
            * CLRC                  Clear carry bit
            * CLRN                  Clear negative bit
            * CLRZ                  Clear zero bit
              CMP[.W];CMP.B src,dst     dst - src
            * DADC[.W];DADC.B dst       dst + C -> dst (decimal)
              DADD[.W];DADD.B src,dst   src + dst + C -> dst (decimal)
            * DEC[.W];DEC.B dst     dst - 1 -> dst
            * DECD[.W];DECD.B dst   dst - 2 -> dst
            * DINT                  Disable interrupt
            * EINT                  Enable interrupt
            * INC[.W];INC.B dst     dst + 1 -> dst
            * INCD[.W];INCD.B dst   dst + 2 -> dst
            * INV[.W];INV.B dst     Invert destination
              JC/JHS Label          Jump to Label if Carry-bit is set
              JEQ/JZ Label          Jump to Label if Zero-bit is set
              JGE Label             Jump to Label if (N .XOR. V) = 0
              JL Label              Jump to Label if (N .XOR. V) = 1
              JMP Label             Jump to Label unconditionally
              JN Label              Jump to Label if Negative-bit is set
              JNC/JLO Label         Jump to Label if Carry-bit is reset
              JNE/JNZ Label         Jump to Label if Zero-bit is reset
              MOV[.W];MOV.B src,dst     src -> dst
            * NOP                   No operation

            AS430 ASSEMBLER                                        PAGE AD-4
            MPS430 ADDRESSING MODES

            * POP[.W];POP.B dst     Item from stack, SP+2 -> SP
              PUSH[.W];PUSH.B src   SP - 2 -> SP, src -> @SP
              RETI                  Return from interrupt
                                        TOS -> SR, SP + 2 -> SP
                                        TOS -> PC, SP + 2 -> SZP
            * RET                   Return from subroutine
                                        TOS -> PC, SP + 2 -> SP
            * RLA[.W];RLA.B dst     Rotate left arithmetically
            * RLC[.W];RLC.B dst     Rotate left through carry
              RRA[.W];RRA.B dst     MSB -> MSB . ....LSB -> C
              RRC[.W];RRC.B dst     C -> MSB . ......LSB -> C
            * SBC[.W];SBC.B dst     Subtract carry from destination
            * SETC                  Set carry bit
            * SETN                  Set negative bit
            * SETZ                  Set zero bit
              SUB[.W];SUB.B src,dst     dst + .not.src + 1 -> dst
              SUBC[.W];SUBC.B src,dst   dst + .not.src + C -> dst
              SBB[.W];SBB.B src,dst     dst + .not.src + C -> dst
              SWPB dst              swap bytes
              SXT dst               Bit7 -> Bit8 ........ Bit15
            * TST[.W];TST.B dst     Test destination
              XOR[.W];XOR.B src,dst     src .xor. dst -> dst
                    Note: Asterisked Instructions
                    Asterisked (*) instructions are emulated.
                    They are replaced with coreinstructions
                    by the assembler.

                                       APPENDIX AE

                                    AS61860 ASSEMBLER

            AE.1  ACKNOWLEDGMENT

               Thanks  to  Edgar  Puehringer  for  his  contribution  of the
            AS61860 cross assembler.

                    Edgar Peuhringer
                    edgar_pue at yahoo dot com

            AE.2  61860 REGISTER SET

            The  SC61860  from  Sharp has 96 bytes of internal RAM which are
            used as registers and hardware stack.  The last  four  bytes  of
            the  internal  RAM  are  special  purpose registers (I/O, timers
            ...).  Here is a list of the 61860 registers:

                    Reg     Address         Common use
                    ---     -------         ----------
                    i, j    0, 1            Length of block operations
                    a, b    2, 3            Accumulator
                    xl, xh  4, 5            Pointer for read operations
                    yl, yh  6, 7            Pointer for write operations
                    k - n   8 - 0x0b        General purpose (counters ...)
                      -     0x0c - 0x5b     Stack
                    ia      0x5c            Inport A
                    ib      0x5d            Inport B
                    fo      0x5e            Outport F
                    cout    0x5f            Control port

            AS61860 ASSEMBLER                                      PAGE AE-2
            61860 REGISTER SET

               Other  parts of the 61860 are the 16 bit program counter (pc)
            and 16 bit data pointer (dp).  The ALU has a carry flag (c)  and
            a zero flag (z).  There is an internal register d which can't be
            accessed with machine instructions.  It is filled from  i  or  j
            when executing block operations.

               In addition there are three 7 bit registers p, q, and r which
            are used to address the internal RAM (r is the stack pointer,  p
            and q are used for block operations).

            AE.3  PROCESSOR SPECIFIC DIRECTIVES

               The  AS61860  cross  assembler has two (2) processor specific
            assembler directives which are used for the etc mnemonic  (which
            is a kind of a built-in switch/case statement):

                    .default        A 16 bit address (same as .dw)
                    .case           One byte followed by a 16 bit address

            Here is an example how this should be used (cut from a lst
            file)::

               022B 7A 05 02 18         614         PTC     0x05,   CONT16
               022F 69                  615         DTC
               0230 4C 01 25            616         .CASE   0x4C,   SLOADI
               0233 4D 01 2F            617         .CASE   0x4D,   SMERGI
               0236 51 01 D2            618         .CASE   0x51,   QUITI
               0239 53 00 CD            619         .CASE   0x53,   LLISTI
               023C 56 01 D5            620         .CASE   0x56,   VERI
               023F 01 D1               621         .DEFAULT        CONT9

            AE.4  61860 INSTRUCTION SET

               The  following  tables list all 61860 family mnemonics recog-
            nized by the AS61860 assembler.  Most of the mnemonics are  con-
            verted  into  8  bit  machine instructions with no argument or a
            one- or two-byte argument.  There are some exceptions for this:

                    Mnemonic        Description
                    --------        -----------
                    jp              2 bit instruction, 6 bit argument
                    cal             3 bit instruction, 13 bit argument
                    ptc *)          1 byte instruction, 3 byte argument
                    dtc *)          1 byte instruction, n bytes argument

                    *) Not mentioned in the CPU specification from Sharp

            AS61860 ASSEMBLER                                      PAGE AE-3
            61860 INSTRUCTION SET

            AE.4.1  Load Immediate Register

                    LII n           (n --> I)
                    LIJ n
                    LIA n
                    LIB n
                    LIP n
                    LIQ n
                    LIDP nm
                    LIDL n          (DL is the low byte of DP)
                    LP              (One byte version of LIP)
                    RA              (Same as LIA 0, but only one byte)
                    CLRA            (synonym for RA)

            AE.4.2  Load Accumulator

                    LDP             (P --> A)
                    LDQ
                    LDR
                    LDM             ((P) --> A)
                    LDD             ((DP) --> A)

            AE.4.3  Store Accumulator

                    STP             (A --> P)
                    STQ
                    STR
                    STD             (A --> (DP))

            AE.4.4  Move Data

                    MVDM            ((P) --> (DP))
                    MVMD            ((DP) --> (P))

            AS61860 ASSEMBLER                                      PAGE AE-4
            61860 INSTRUCTION SET

            AE.4.5  Exchange Data

                    EXAB            (A <--> B)
                    EXAM            (A <--> (P))

            AE.4.6  Stack Operations

                    PUSH            (R - 1 --> R, A --> (R))
                    POP             ((R) --> A, R + 1 --> R)
                    LEAVE           (0 --> (R))

            AE.4.7  Block Move Data

                    MVW             ((Q) --> (P), I+1 bytes)
                    MVB             ((Q) --> (P), J+1 bytes)
                    MVWD            ((DP) --> (P), I+1 bytes)
                    MVBD            ((DP) --> (P), J+1 bytes)
                    DATA            ((B,A) --> (P), I+1 bytes,
                                    reads CPU ROM also)

            AE.4.8  Block Exchange Data

                    EXW             ((Q) <--> (P), I+1 bytes)
                    EXB             ((Q) <--> (P), J+1 bytes)
                    EXWD            ((DP) <--> (P), I+1 bytes)
                    EXBD            ((DP) <--> (P), J+1 bytes)

            AS61860 ASSEMBLER                                      PAGE AE-5
            61860 INSTRUCTION SET

            AE.4.9  Increment and Decrement

                    INCP            (P + 1 --> P)
                    DECP
                    INCI
                    DECI
                    INCJ
                    DECJ
                    INCA
                    DECA
                    INCB
                    DECB
                    INCK
                    DECK
                    INCL
                    DECL
                    IX              (X + 1 --> X, X --> DP)
                    DX
                    IY
                    DY
                    INCM *)
                    DECM *)
                    INCN *)
                    DECN *)

                    *) Not mentioned in the CPU specification from Sharp

            AE.4.10  Increment/Decrement with Load/Store

                    IXL             (Same as IX plus LDD)
                    DXL
                    IYS             (Same as IY plus STD)
                    DYS

            AE.4.11  Fill

                    FILM            (A --> (P), I+1 bytes)
                    FILD            (A --> (DP), I+1 bytes)

            AS61860 ASSEMBLER                                      PAGE AE-6
            61860 INSTRUCTION SET

            AE.4.12  Addition and Subtraction

                    ADIA n          (A + n --> A)
                    SBIA n
                    ADIM n          ((P) + n --> (P))
                    SBIM n
                    ADM n           ((P) + A --> (P))
                    SBM n
                    ADCM n          ((P) + A --> (P), with carry)
                    SBCM
                    ADB             (like ADM, but 16 bit)
                    SBB
                    ADN             (like ADM, BCD addition, I+1 bytes)
                    SBN
                    ADW             ((P) + (Q) --> (P), BCD, I+1 bytes)
                    SBW

            AE.4.13  Shift Operations

                    SRW             (shift I+1 bytes in (P) 4 bits right)
                    SLW
                    SR              (shift A 1 bit, with carry)
                    SL
                    SWP             (exchange low and high nibble of A)

            AE.4.14  Boolean Operations

                    ANIA n          (A & n --> A)
                    ORIA n
                    ANIM n          ((P) & n --> (P))
                    ORIM n
                    ANID n          ((DP) & n --> (DP))
                    ORID n
                    ANMA            ((P) & A --> (P))
                    ORMA

            AS61860 ASSEMBLER                                      PAGE AE-7
            61860 INSTRUCTION SET

            AE.4.15  Compare

                    CPIA n          (A - n --> c,z)
                    CPIM n          ((P) - n --> c,z)
                    CPMA            ((P) - A --> c,z)
                    TSIA n          (A & n --> z)
                    TSIM n          ((P) & n --> z)
                    TSID n          ((DP) & n --> z)
                    TSIP            ((P) & A --> z)

            AE.4.16  CPU Control

                    SC              (Set carry)
                    RC
                    NOPW            (no op)
                    NOPT
                    WAIT n          (wait 6+n cycles)
                    WAITJ           (wait 5+4*I cycles)
                    CUP             (synonym for WAITJ)

            AE.4.17  Absolute Jumps

                    JP nm
                    JPZ nm          (on zero)
                    JPNZ nm
                    JPC nm
                    JPNC nm
                    PTC/DTC         (see 'Processor Specific Directives')
                    PTJ/DTJ         (synonym for PTD/DTC)
                    CPCAL/DTLRA     (synonym for PTC/DTC)
                    CASE1/CASE2     (synonym for PTC/DTC)
                    SETT/JST        (synonym for PTC/DTC)

            AS61860 ASSEMBLER                                      PAGE AE-8
            61860 INSTRUCTION SET

            AE.4.18  Relative Jumps

               These  operations  handle  a  jump relative to PC forward and
            back with  a  maximum  distance  of  255  byte.   The  assembler
            resolves 16 bit addresses to to 8 bit relative adresses.  If the
            target address is to far away, an error will be generated.  Note
            that relative jumps need 1 byte less than absolute jumps.

                    JRP nm
                    JRZP nm
                    JRNZP nm        (jump relative non zero plus direction)
                    JRCP nm
                    JRNCP nm
                    JRM nm
                    JRZM nm
                    JRNZM nm
                    JRCM nm         (jump relative on carry minus direction)
                    JRNCM nm
                    LOOP nm         (decrements (R) and makes a JRNCM)

            AE.4.19  Calls

                    CALL nm
                    CAL nm          (nm must be <= 0x1fff,
                                    1 byte less code than CALL)
                    RTN

            AE.4.20  Input and output

                    INA             (IA --> A)
                    INB
                    OUTA
                    OUTB
                    OUTF            (A --> FO)
                    OUTC            (control port)
                    TEST n          (timers, pins & n --> z)

            AS61860 ASSEMBLER                                      PAGE AE-9
            61860 INSTRUCTION SET

            AE.4.21  Unknown Commands

                    READ            ((PC+1) -> A)
                    READM           ((PC+1) -> (P))
                    WRIT            (???)

                                       APPENDIX AF

                                    AS6500 ASSEMBLER

            AF.1  ACKNOWLEDGMENT

               Thanks  to  Marko  Makela  for his contribution of the AS6500
            cross assembler.

                    Marko Makela
                    Sillitie 10 A
                    01480 Vantaa
                    Finland
                    Internet: Marko dot Makela at Helsinki dot Fi
                    EARN/BitNet: msmakela at finuh

               Several  additions and modifications were made to his code to
            support the following families of 6500 processors:

                    (1)     650X and 651X processor family
                    (2)     65F11 and 65F12 processor family
                    (3)     65C00/21 and 65C29 processor family
                    (4)     65C02, 65C102, and 65C112 processor family

               The  instruction  syntax of this cross assembler contains two
            peculiarities:  (1) the addressing indirection is denoted by the
            square  brackets  []  and (2) the `bbrx' and `bbsx' instructions
            are written `bbr0 memory,label'.

            AS6500 ASSEMBLER                                       PAGE AF-2
            6500 REGISTER SET

            AF.2  6500 REGISTER SET

            The following is a list of the 6500 registers used by AS6500:

                    a       -       8-bit accumulator
                    x,y     -       index registers

            AF.3  6500 INSTRUCTION SET

               The  following  tables  list all 6500 family mnemonics recog-
            nized by the AS6500 assembler.  The designation [] refers  to  a
            required addressing mode argument.  The following list specifies
            the format for each addressing mode supported by AS6500:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    offset,x        indexed addressing
                    offset,y        indexed addressing
                                    address = (offset + (x or y))

                    [offset,x]      pre-indexed indirect addressing
                                    0 <= offset <= 255
                                    address = contents of location
                                        (offset + (x or y)) mod 256

                    [offset],y      post-indexed indirect addressing
                                    address = contents of location at offset
                                        plus the value of the y register

                    [address]       indirect addressing

                    ext             extended addressing

                    label           branch label

                    address,label   direct page memory location
                                    branch label
                                    bbrx and bbsx instruction addressing

            The  terms data, dir, offset, address, ext, and label may all be
            expressions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 65xx technical data for valid modes.

            AS6500 ASSEMBLER                                       PAGE AF-3
            6500 INSTRUCTION SET

            AF.3.1  Processor Specific Directives

               The  AS6500  cross  assembler has four (4) processor specific
            assembler directives which  define  the  target  65xx  processor
            family:

                    .r6500          Core 650X and 651X family (default)
                    .r65f11         Core plus 65F11 and 65F12
                    .r65c00         Core plus 65C00/21 and 65C29
                    .r65c02         Core plus 65C02, 65C102, and 65C112

            AF.3.2  65xx Core Inherent Instructions

                    brk                     clc
                    cld                     cli
                    clv                     dex
                    dey                     inx
                    iny                     nop
                    pha                     php
                    pla                     plp
                    rti                     rts
                    sec                     sed
                    sei                     tax
                    tay                     tsx
                    txa                     txs
                    tya

            AF.3.3  65xx Core Branch Instructions

                    bcc     label           bhs     label
                    bcs     label           blo     label
                    beq     label           bmi     label
                    bne     label           bpl     label
                    bvc     label           bvs     label

            AF.3.4  65xx Core Single Operand Instructions

                    asl     []
                    dec     []
                    inc     []
                    lsr     []
                    rol     []
                    ror     []

            AS6500 ASSEMBLER                                       PAGE AF-4
            6500 INSTRUCTION SET

            AF.3.5  65xx Core Double Operand Instructions

                    adc     []
                    and     []
                    bit     []
                    cmp     []
                    eor     []
                    lda     []
                    ora     []
                    sbc     []
                    sta     []

            AF.3.6  65xx Core Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

            AF.3.7  65xx Core Miscellaneous X and Y Register Instructions

                    cpx     []
                    cpy     []
                    ldx     []
                    stx     []
                    ldy     []
                    sty     []

            AS6500 ASSEMBLER                                       PAGE AF-5
            6500 INSTRUCTION SET

            AF.3.8  65F11 and 65F12 Specific Instructions

                    bbr0    [],label                bbr1    [],label
                    bbr2    [],label                bbr3    [],label
                    bbr4    [],label                bbr5    [],label
                    bbr6    [],label                bbr7    [],label

                    bbs0    [],label                bbs1    [],label
                    bbs2    [],label                bbs3    [],label
                    bbs4    [],label                bbs5    [],label
                    bbs6    [],label                bbs7    [],label

                    rmb0    []                      rmb1    []
                    rmb2    []                      rmb3    []
                    rmb4    []                      rmb5    []
                    rmb6    []                      rmb7    []

                    smb0    []                      smb1    []
                    smb2    []                      smb3    []
                    smb4    []                      smb5    []
                    smb6    []                      smb7    []

            AF.3.9  65C00/21 and 65C29 Specific Instructions

                    bbr0    [],label                bbr1    [],label
                    bbr2    [],label                bbr3    [],label
                    bbr4    [],label                bbr5    [],label
                    bbr6    [],label                bbr7    [],label

                    bbs0    [],label                bbs1    [],label
                    bbs2    [],label                bbs3    [],label
                    bbs4    [],label                bbs5    [],label
                    bbs6    [],label                bbs7    [],label

                    bra     label

                    phx                             phy
                    plx                             ply

                    rmb0    []                      rmb1    []
                    rmb2    []                      rmb3    []
                    rmb4    []                      rmb5    []
                    rmb6    []                      rmb7    []

                    smb0    []                      smb1    []
                    smb2    []                      smb3    []
                    smb4    []                      smb5    []
                    smb6    []                      smb7    []

            AS6500 ASSEMBLER                                       PAGE AF-6
            6500 INSTRUCTION SET

            AF.3.10  65C02, 65C102, and 65C112 Specific Instructions

                    bbr0    [],label                bbr1    [],label
                    bbr2    [],label                bbr3    [],label
                    bbr4    [],label                bbr5    [],label
                    bbr6    [],label                bbr7    [],label

                    bbs0    [],label                bbs1    [],label
                    bbs2    [],label                bbs3    [],label
                    bbs4    [],label                bbs5    [],label
                    bbs6    [],label                bbs7    [],label

                    bra     label

                    phx                             phy
                    plx                             ply

                    rmb0    []                      rmb1    []
                    rmb2    []                      rmb3    []
                    rmb4    []                      rmb5    []
                    rmb6    []                      rmb7    []

                    smb0    []                      smb1    []
                    smb2    []                      smb3    []
                    smb4    []                      smb5    []
                    smb6    []                      smb7    []

                    stz     []
                    trb     []
                    tsb     []

               Additional  addressing  modes for the following core instruc-
            tions are also available with the 65C02, 65C102, and 65C112 pro-
            cessors.

                    adc     []                      and     []
                    cmp     []                      eor     []
                    lda     []                      ora     []
                    sbc     []                      sta     []

                    bit     []                      jmp     []

                    dec                             inc

                                       APPENDIX AG

                                    AS6800 ASSEMBLER

            AG.1  6800 REGISTER SET

            The following is a list of the 6800 registers used by AS6800:

                    a,b     -       8-bit accumulators
                    x       -       index register

            AG.2  6800 INSTRUCTION SET

               The following tables list all 6800/6802/6808 mnemonics recog-
            nized by the AS6800 assembler.  The designation [] refers  to  a
            required addressing mode argument.  The following list specifies
            the format for each addressing mode supported by AS6800:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    ,x              register indirect addressing
                                    zero offset

                    offset,x        register indirect addressing
                                    0 <= offset <= 255

                    ext             extended addressing

                    label           branch label

            The  terms  data, dir, offset, ext, and label may all be expres-
            sions.

            AS6800 ASSEMBLER                                       PAGE AG-2
            6800 INSTRUCTION SET

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 6800 technical data for valid modes.

            AG.2.1  Inherent Instructions

                    aba                     cba
                    clc                     cli
                    clv                     daa
                    des                     dex
                    ins                     inx
                    nop                     rti
                    rts                     sba
                    sec                     sei
                    sev                     swi
                    tab                     tap
                    tba                     tpa
                    tsx                     txs
                    wai

                    psha                    pshb
                    psh a                   psh b
                    pula                    pulb
                    pul a                   pul b

            AG.2.2  Branch Instructions

                    bra     label           bhi     label
                    bls     label           bcc     label
                    bhs     label           bcs     label
                    blo     label           bne     label
                    beq     label           bvc     label
                    bvs     label           bpl     label
                    bmi     label           bge     label
                    blt     label           bgt     label
                    ble     label           bsr     label

            AS6800 ASSEMBLER                                       PAGE AG-3
            6800 INSTRUCTION SET

            AG.2.3  Single Operand Instructions

                    asla                    aslb
                    asl a                   asl b
                    asl     []

                    asra                    asrb
                    asr a                   asr b
                    asr     []

                    clra                    clrb
                    clr a                   clr b
                    clr     []

                    coma                    comb
                    com a                   com b
                    com     []

                    deca                    decb
                    dec a                   dec b
                    dec     []

                    inca                    incb
                    inc a                   inc b
                    inc     []

                    lsla                    lslb
                    lsl a                   lsl b
                    lsl     []

                    lsra                    lsrb
                    lsr a                   lsr b
                    lsr     []

                    nega                    negb
                    neg a                   neg b
                    neg     []

                    rola                    rolb
                    rol a                   rol b
                    rol     []

                    rora                    rorb
                    ror a                   ror b
                    ror     []

                    tsta                    tstb
                    tst a                   tst b
                    tst     []

            AS6800 ASSEMBLER                                       PAGE AG-4
            6800 INSTRUCTION SET

            AG.2.4  Double Operand Instructions

                    adca    []              adcb    []
                    adc a   []              adc b   []

                    adda    []              addb    []
                    add a   []              add b   []

                    anda    []              andb    []
                    and a   []              and b   []

                    bita    []              bitb    []
                    bit a   []              bit b   []

                    cmpa    []              cmpb    []
                    cmp a   []              cmp b   []

                    eora    []              eorb    []
                    eor a   []              eor b   []

                    ldaa    []              ldab    []
                    lda a   []              lda b   []

                    oraa    []              orab    []
                    ora a   []              ora b   []

                    sbca    []              sbcb    []
                    sbc a   []              sbc b   []

                    staa    []              stab    []
                    sta a   []              sta b   []

                    suba    []              subb    []
                    sub a   []              sub b   []

            AG.2.5  Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

            AS6800 ASSEMBLER                                       PAGE AG-5
            6800 INSTRUCTION SET

            AG.2.6  Long Register Instructions

                    cpx     []
                    lds     []              sts     []
                    ldx     []              stx     []

                                       APPENDIX AH

                                    AS6801 ASSEMBLER

            AH.1  .hd6303 DIRECTIVE

            Format:

                    .hd6303

            The  .hd6303 directive enables processing of the HD6303 specific
            mnemonics not included in  the  6801  instruction  set.   HD6303
            mnemonics  encountered  without  the  .hd6303  directive will be
            flagged with an 'o' error.

            AH.2  6801 REGISTER SET

            The following is a list of the 6801 registers used by AS6801:

                    a,b     -       8-bit accumulators
                    d       -       16-bit accumulator <a:b>
                    x       -       index register

            AH.3  6801 INSTRUCTION SET

               The following tables list all 6801/6803/6303 mnemonics recog-
            nized by the AS6801 assembler.  The designation [] refers  to  a
            required addressing mode argument.  The following list specifies
            the format for each addressing mode supported by AS6801:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

            AS6801 ASSEMBLER                                       PAGE AH-2
            6801 INSTRUCTION SET

                    ,x              register indirect addressing
                                    zero offset

                    offset,x        register indirect addressing
                                    0 <= offset <= 255

                    ext             extended addressing

                    label           branch label

            The  terms  data, dir, offset, ext, and label may all be expres-
            sions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to  the  6801/6303  technical  data  for  valid
            modes.

            AH.3.1  Inherent Instructions

                    aba             abx
                    cba             clc
                    cli             clv
                    daa             des
                    dex             ins
                    inx             mul
                    nop             rti
                    rts             sba
                    sec             sei
                    sev             swi
                    tab             tap
                    tba             tpa
                    tsx             txs
                    wai

            AH.3.2  Branch Instructions

                    bra     label           brn     label
                    bhi     label           bls     label
                    bcc     label           bhs     label
                    bcs     label           blo     label
                    bne     label           beq     label
                    bvc     label           bvs     label
                    bpl     label           bmi     label
                    bge     label           blt     label
                    bgt     label           ble     label
                    bsr     label

            AS6801 ASSEMBLER                                       PAGE AH-3
            6801 INSTRUCTION SET

            AH.3.3  Single Operand Instructions

                    asla            aslb            asld
                    asl a           asl b           asl d
                    asl     []

                    asra            asrb
                    asr a           asr b
                    asr     []

                    clra            clrb
                    clr a           clr b
                    clr     []

                    coma            comb
                    com a           com b
                    com     []

                    deca            decb
                    dec a           dec b
                    dec     []

                    eora            eorb
                    eor a           eor b
                    eor     []

                    inca            incb
                    inc a           inc b
                    inc     []

                    lsla            lslb            lsld
                    lsl a           lsl b           lsl d
                    lsl     []

                    lsra            lsrb            lsrd
                    lsr a           lsr b           lsr d
                    lsr     []

                    nega            negb
                    neg a           neg b
                    neg     []

                    psha            pshb            pshx
                    psh a           psh b           psh x

                    pula            pulb            pulx
                    pul a           pul b           pul x

                    rola            rolb
                    rol a           rol b
                    rol     []

            AS6801 ASSEMBLER                                       PAGE AH-4
            6801 INSTRUCTION SET

                    rora            rorb
                    ror a           ror b
                    ror     []

                    tsta            tstb
                    tst a           tst b
                    tst     []

            AH.3.4  Double Operand Instructions

                    adca    []      adcb    []
                    adc a   []      adc b   []

                    adda    []      addb    []      addd    []
                    add a   []      add b   []      add d   []

                    anda    []      andb    []
                    and a   []      and b   []

                    bita    []      bitb    []
                    bit a   []      bit b   []

                    cmpa    []      cmpb    []
                    cmp a   []      cmp b   []

                    ldaa    []      ldab    []
                    lda a   []      lda b   []

                    oraa    []      orab    []
                    ora a   []      ora b   []

                    sbca    []      sbcb    []
                    sbc a   []      sbc b   []

                    staa    []      stab    []
                    sta a   []      sta b   []

                    suba    []      subb    []      subd    []
                    sub a   []      sub b   []      sub d   []

            AS6801 ASSEMBLER                                       PAGE AH-5
            6801 INSTRUCTION SET

            AH.3.5  Jump and Jump to Subroutine Instructions

                    jmp     []      jsr     []

            AH.3.6  Long Register Instructions

                    cpx     []      ldd     []
                    lds     []      ldx     []
                    std     []      sts     []
                    stx     []

            AH.3.7  6303 Specific Instructions

                    aim     #data, []       eim     #data, []
                    oim     #data, []       tim     #data, []

                    xgdx            slp

                                       APPENDIX AI

                                    AS6804 ASSEMBLER

               Requires the .setdp directive to specify the ram area.

            AI.1  6804 REGISTER SET

            The following is a list of the 6804 registers used by AS6804:

                    x,y     -       index registers

            AI.2  6804 INSTRUCTION SET

               The  following  tables  list all 6804 mnemonics recognized by
            the AS6804 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by AS6804:

                    #data           immediate data
                                    byte or word data

                    ,x              register indirect addressing

                    dir             direct addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    ext             extended addressing

                    label           branch label

            The  terms data, dir, and ext may be expressions.  The label for
            the short branchs beq, bne, bcc, and bcs must not be external.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 6804 technical data for valid modes.

            AS6804 ASSEMBLER                                       PAGE AI-2
            6804 INSTRUCTION SET

            AI.2.1  Inherent Instructions

                    coma            decx
                    decy            incx
                    incy            rola
                    rti             rts
                    stop            tax
                    tay             txa
                    tya             wait

            AI.2.2  Branch Instructions

                    bne     label           beq     label
                    bcc     label           bcs     label

            AI.2.3  Single Operand Instructions

                    add     []
                    and     []
                    cmp     []
                    dec     []
                    inc     []
                    lda     []
                    sta     []
                    sub     []

            AI.2.4  Jump and Jump to Subroutine Instructions

                    jsr     []
                    jmp     []

            AI.2.5  Bit Test Instructions

                    brclr   #data,[],label
                    brset   #data,[],label

                    bclr    #label,[]
                    bset    #label,[]

            AS6804 ASSEMBLER                                       PAGE AI-3
            6804 INSTRUCTION SET

            AI.2.6  Load Immediate data Instruction

                    mvi     [],#data

            AI.2.7  6804 Derived Instructions

                    asla
                    bam     label
                    bap     label
                    bxmi    label
                    bxpl    label
                    bymi    label
                    bypl    label
                    clra
                    clrx
                    clry
                    deca
                    decx
                    decy
                    inca
                    incx
                    incy
                    ldxi    #data
                    ldyi    #data
                    nop
                    tax
                    tay
                    txa
                    tya

                                       APPENDIX AJ

                                  AS68(HC)05 ASSEMBLER

            AJ.1  .6805 DIRECTIVE

            Format:

                    .6805

            The  .6805 directive selects the MC6805 specific cycles count to
            be output.

            AJ.2  .hc05 DIRECTIVE

            Format:

                    .hc05

            The  .hc05 directive selects the MC68HC05/146805 specific cycles
            count to be output.

            AJ.3  THE .__.CPU.  VARIABLE

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values  for  the  ASZ80
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                        .6805                        0
                        .hc05                        1

            AS68(HC)05 ASSEMBLER                                   PAGE AJ-2
            THE .__.CPU.  VARIABLE

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AJ.4  6805 REGISTER SET

            The following is a list of the 6805 registers used by AS6805:

                    a       -       8-bit accumulator
                    x       -       index register

            AJ.5  6805 INSTRUCTION SET

               The  following  tables  list all 6805 mnemonics recognized by
            the AS6805 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by AS6805:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    ,x              register indirect addressing
                                    zero offset

                    offset,x        register indirect addressing
                                      0 <= offset <= 255   --- byte mode
                                    256 <= offset <= 65535 --- word mode
                                    (an externally defined offset uses the
                                     word mode)

                    ext             extended addressing

                    label           branch label

            The terms data, dir, offset, and ext may all be expressions.

            AS68(HC)05 ASSEMBLER                                   PAGE AJ-3
            6805 INSTRUCTION SET

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 6805 technical data for valid modes.

            AJ.5.1  Control Instructions

                    clc             cli
                    nop             rsp
                    rti             rts
                    sec             sei
                    stop            swi
                    tax             txa
                    wait

            AJ.5.2  Bit Manipulation Instructions

                    brset   #data,*dir,label
                    brclr   #data,*dir,label

                    bset    #data,*dir
                    bclr    #data,*dir

            AJ.5.3  Branch Instructions

                    bra     label           brn     label
                    bhi     label           bls     label
                    bcc     label           bcs     label
                    bne     label           beq     label
                    bhcc    label           bhcs    label
                    bpl     label           bmi     label
                    bmc     label           bms     label
                    bil     label           bih     label
                    bsr     label

            AS68(HC)05 ASSEMBLER                                   PAGE AJ-4
            6805 INSTRUCTION SET

            AJ.5.4  Read-Modify-Write Instructions

                    nega            negx
                    neg     []

                    coma            comx
                    com     []

                    lsra            lsrx
                    lsr     []

                    rora            rorx
                    ror     []

                    asra            asrx
                    asr     []

                    lsla            lslx
                    lsl     []

                    rola            rolx
                    rol     []

                    deca            decx
                    dec     []

                    inca            incx
                    inc     []

                    tsta            tstx
                    tst     []

                    clra            clrx
                    clr     []

            AJ.5.5  Register\Memory Instructions

                    sub     []              cmp     []
                    sbc     []              cpx     []
                    and     []              bit     []
                    lda     []              sta     []
                    eor     []              adc     []
                    ora     []              add     []
                    ldx     []              stx     []

            AS68(HC)05 ASSEMBLER                                   PAGE AJ-5
            6805 INSTRUCTION SET

            AJ.5.6  Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

                                       APPENDIX AK

                                 AS68(HC[S])08 ASSEMBLER

            AK.1  PROCESSOR SPECIFIC DIRECTIVES

               The MC68HC(S)08 processor is a superset of the MC6805 proces-
            sors.  The AS6808 assembler supports the HC08, HCS08, 6805,  and
            HC05 cores.

            AK.1.1  .hc08 Directive

            Format:

                    .hc08

            The .hc08 directive enables processing of only the HC08 specific
            mnemonics.  6805/HC05/HCS08 mnemonics  encountered  without  the
            .hc08 directive will be flagged with an 'o' error.

               The  .hc08  directive  also  selects the HC08 specific cycles
            count to be output.

            AK.1.2  .hcs08 Directive

            Format:

                    .hcs08

            The  .hcs08  directive  enables processing of the HCS08 specific
            mnemonics.

               The  .hcs08  directive also selects the HCS08 specific cycles
            count to be output.

            AS68(HC[S])08 ASSEMBLER                                PAGE AK-2
            PROCESSOR SPECIFIC DIRECTIVES

            AK.1.3  .6805 Directive

            Format:

                    .6805

            The  .6805  directive  enables  processing of only the 6805/HC05
            specific mnemonics.  HC08/HCS08  mnemonics  encountered  without
            the .hc08/.hcs08 directives will be flagged with an 'o' error.

               The  .6805  directive also selects the MC6805 specific cycles
            count to be output.

            AK.1.4  .hc05 Directive

            Format:

                    .hc05

            The  .hc05  directive  enables  processing of only the 6805/HC05
            specific mnemonics.  HC08/HCS08  mnemonics  encountered  without
            the .hc08/.hcs08 directives will be flagged with an 'o' error.

               The .hc05 directive also selects the MC68HC05/146805 specific
            cycles count to be output.

            AK.1.5  The .__.CPU.  Variable

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values for  the  AS6808
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                        .hc08                        0
                        .hcs08                       1
                        .6805                        2
                        .hc05                        3

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to

            AS68(HC[S])08 ASSEMBLER                                PAGE AK-3
            PROCESSOR SPECIFIC DIRECTIVES

            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AK.2  68HC(S)08 REGISTER SET

            The  following  is  a  list  of  the 68HC(S)08 registers used by
            AS6808:

                    a       -       8-bit accumulator
                    x       -       index register  <H:X>
                    s       -       stack pointer

            AK.3  68HC(S)08 INSTRUCTION SET

               The  following tables list all 68HC(S)08 mnemonics recognized
            by the AS6808 assembler.  The designation []  refers  to  a  re-
            quired  addressing  mode argument.  The following list specifies
            the format for each addressing mode supported by AS6808:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    ,x              register indexed addressing
                                    zero offset

                    offset,x        register indexed addressing
                                      0 <= offset <= 255   --- byte mode
                                    256 <= offset <= 65535 --- word mode
                                    (an externally defined offset uses the
                                     word mode)

                    ,x+             register indexed addressing
                                    zero offset with post increment

                    offset,x+       register indexed addressing
                                    unsigned byte offset with post increment

                    offset,s        stack pointer indexed addressing
                                      0 <= offset <= 255   --- byte mode
                                    256 <= offset <= 65535 --- word mode
                                    (an externally defined offset uses the
                                     word mode)

            AS68(HC[S])08 ASSEMBLER                                PAGE AK-4
            68HC(S)08 INSTRUCTION SET

                    ext             extended addressing

                    label           branch label

            The terms data, dir, offset, and ext may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to  the  68HC(S)08  technical  data  for  valid
            modes.

            AK.3.1  Control Instructions

                    clc             cli             daa             div
                    mul             nop             nsa             psha
                    pshh            pshx            pula            pulh
                    pulx            rsp             rti             rts
                    sec             sei             stop            swi
                    tap             tax             tpa             tsx
                    txa             txs             wait

            AK.3.2  Bit Manipulation Instructions

                    brset   #data,*dir,label
                    brclr   #data,*dir,label

                    bset    #data,*dir
                    bclr    #data,*dir

            AK.3.3  Branch Instructions

                    bra     label           brn     label
                    bhi     label           bls     label
                    bcc     label           bcs     label
                    bne     label           beq     label
                    bhcc    label           bhcs    label
                    bpl     label           bmi     label
                    bmc     label           bms     label
                    bil     label           bih     label
                    bsr     label           bge     label
                    blt     label           bgt     label
                    ble     label

            AS68(HC[S])08 ASSEMBLER                                PAGE AK-5
            68HC(S)08 INSTRUCTION SET

            AK.3.4  Complex Branch Instructions

                    cbeqa   [],label
                    cbeqx   [],label
                    cbeq    [],label
                    dbnza   label
                    dbnzx   label
                    dbnz    [],label

            AK.3.5  Read-Modify-Write Instructions

                    nega                    negx
                    neg     []

                    coma                    comx
                    com     []

                    lsra                    lsrx
                    lsr     []

                    rora                    rorx
                    ror     []

                    asra                    asrx
                    asr     []

                    asla                    aslx
                    asl     []

                    lsla                    lslx
                    lsl     []

                    rola                    rolx
                    rol     []

                    deca                    decx
                    dec     []

                    inca                    incx
                    inc     []

                    tsta                    tstx
                    tst     []

                    clra                    clrx
                    clr     []              clrh

                    aix     #data

                    ais     #data

            AS68(HC[S])08 ASSEMBLER                                PAGE AK-6
            68HC(S)08 INSTRUCTION SET

            AK.3.6  Register\Memory Instructions

                    sub     []              cmp     []
                    sbc     []              cpx     []
                    and     []              bit     []
                    lda     []              sta     []
                    eor     []              adc     []
                    ora     []              add     []
                    ldx     []              stx     []

            AK.3.7  Double Operand Move Instruction

                    mov     [],[]

            AK.3.8  16-Bit <H:X> Index Register Instructions

                    cphx    []
                    ldhx    []
                    sthx    []

            AK.3.9  Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

                                       APPENDIX AL

                                    AS6809 ASSEMBLER

            AL.1  6809 REGISTER SET

            The following is a list of the 6809 registers used by AS6809:

                    a,b     -       8-bit accumulators
                    d       -       16-bit accumulator <a:b>
                    x,y     -       index registers
                    s,u     -       stack pointers
                    pc      -       program counter
                    cc      -       condition code
                    dp      -       direct page

            AL.2  6809 INSTRUCTION SET

               The  following  tables  list all 6809 mnemonics recognized by
            the AS6809 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by AS6809:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    label           branch label

                    r,r1,r2         registers
                                    cc,a,b,d,dp,x,y,s,u,pc

                    ,-x     ,--x    register indexed
                                    autodecrement

            AS6809 ASSEMBLER                                       PAGE AL-2
            6809 INSTRUCTION SET

                    ,x+     ,x++    register indexed
                                    autoincrement

                    ,x              register indexed addressing
                                    zero offset

                    offset,x        register indexed addressing
                                       -16 <= offset <= 15    ---  5-bit
                                      -128 <= offset <= -17   ---  8-bit
                                        16 <= offset <= 127   ---  8-bit
                                    -32768 <= offset <= -129  --- 16-bit
                                       128 <= offset <= 32767 --- 16-bit
                                    (external definition of offset
                                     uses 16-bit mode)

                    a,x             accumulator offset indexed addressing

                    ext             extended addressing

                    ext,pc          pc addressing ( pc <- pc + ext )

                    ext,pcr         pc relative addressing

                    [,--x]          register indexed indirect
                                    autodecrement

                    [,x++]          register indexed indirect
                                    autoincrement

                    [,x]            register indexed indirect addressing
                                    zero offset

                    [offset,x]      register indexed indirect addressing
                                      -128 <= offset <= 127   ---  8-bit
                                    -32768 <= offset <= -129  --- 16-bit
                                       128 <= offset <= 32767 --- 16-bit
                                    (external definition of offset
                                     uses 16-bit mode)

                    [a,x]           accumulator offset indexed
                                    indirect addressing

                    [ext]           extended indirect addressing

                    [ext,pc]        pc indirect addressing
                                    ( [pc <- pc + ext] )

                    [ext,pcr]       pc relative indirect addressing

            The  terms  data, dir, label, offset, and ext may all be expres-
            sions.

            AS6809 ASSEMBLER                                       PAGE AL-3
            6809 INSTRUCTION SET

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 6809 technical data for valid modes.

            AL.2.1  Inherent Instructions

                    abx             daa
                    mul             nop
                    rti             rts
                    sex             swi
                    swi1            swi2
                    swi3            sync

            AL.2.2  Short Branch Instructions

                    bcc     label           bcs     label
                    beq     label           bge     label
                    bgt     label           bhi     label
                    bhis    label           bhs     label
                    ble     label           blo     label
                    blos    label           bls     label
                    blt     label           bmi     label
                    bne     label           bpl     label
                    bra     label           brn     label
                    bvc     label           bvs     label
                    bsr     label

            AL.2.3  Long Branch Instructions

                    lbcc    label           lbcs    label
                    lbeq    label           lbge    label
                    lbgt    label           lbhi    label
                    lbhis   label           lbhs    label
                    lble    label           lblo    label
                    lblos   label           lbls    label
                    lblt    label           lbmi    label
                    lbne    label           lbpl    label
                    lbra    label           lbrn    label
                    lbvc    label           lbvs    label
                    lbsr    label

            AS6809 ASSEMBLER                                       PAGE AL-4
            6809 INSTRUCTION SET

            AL.2.4  Single Operand Instructions

                    asla            aslb
                    asl     []

                    asra            asrb
                    asr     []

                    clra            clrb
                    clr     []

                    coma            comb
                    com     []

                    deca            decb
                    dec     []

                    inca            incb
                    inc     []

                    lsla            lslb
                    lsl     []

                    lsra            lsrb
                    lsr     []

                    nega            negb
                    neg     []

                    rola            rolb
                    rol     []

                    rora            rorb
                    ror     []

                    tsta            tstb
                    tst     []

            AS6809 ASSEMBLER                                       PAGE AL-5
            6809 INSTRUCTION SET

            AL.2.5  Double Operand Instructions

                    adca    []              adcb    []

                    adda    []              addb    []

                    anda    []              andb    []

                    bita    []              bitb    []

                    cmpa    []              cmpb    []

                    eora    []              eorb    []

                    lda     []              ldb     []

                    ora     []              orb     []

                    sbca    []              sbcb    []

                    sta     []              stb     []

                    suba    []              subb    []

            AL.2.6  D-register Instructions

                    addd    []              subd    []
                    cmpd    []              ldd     []
                    std     []

            AL.2.7  Index/Stack Register Instructions

                    cmps    []              cmpu    []
                    cmpx    []              cmpy    []

                    lds     []              ldu     []
                    ldx     []              ldy     []

                    leas    []              leau    []
                    leax    []              leay    []

                    sts     []              stu     []
                    stx     []              sty     []

                    pshs    r               pshu    r
                    puls    r               pulu    r

            AS6809 ASSEMBLER                                       PAGE AL-6
            6809 INSTRUCTION SET

            AL.2.8  Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

            AL.2.9  Register - Register Instructions

                    exg     r1,r2           tfr     r1,r2

            AL.2.10  Condition Code Register Instructions

                    andcc   #data           orcc    #data
                    cwai    #data

            AL.2.11  6800 Compatibility Instructions

                    aba             cba
                    clc             cli
                    clv             des
                    dex             ins
                    inx
                    ldaa    []      ldab    []
                    oraa    []      orab    []
                    psha            pshb
                    pula            pulb
                    sba             sec
                    sei             sev
                    staa    []      stab    []
                    tab             tap
                    tba             tpa
                    tsx             txs
                    wai

                                       APPENDIX AM

                                    AS6811 ASSEMBLER

            AM.1  68HC11 REGISTER SET

            The following is a list of the 68HC11 registers used by AS6811:

                    a,b     -       8-bit accumulators
                    d       -       16-bit accumulator <a:b>
                    x,y     -       index registers

            AM.2  68HC11 INSTRUCTION SET

               The  following tables list all 68HC11 mnemonics recognized by
            the AS6811 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by AS6811:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    ,x              register indirect addressing
                                    zero offset

                    offset,x        register indirect addressing
                                    0 <= offset <= 255

                    ext             extended addressing

                    label           branch label

            The terms data, dir, offset, and ext may all be expressions.

            AS6811 ASSEMBLER                                       PAGE AM-2
            68HC11 INSTRUCTION SET

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 68HC11 technical data for valid modes.

            AM.2.1  Inherent Instructions

                    aba             abx
                    aby             cba
                    clc             cli
                    clv             daa
                    des             dex
                    dey             fdiv
                    idiv            ins
                    inx             iny
                    mul             nop
                    rti             rts
                    sba             sec
                    sei             sev
                    stop            swi
                    tab             tap
                    tba             tpa
                    tsx             txs
                    wai             xgdx
                    xgdy

                    psha            pshb
                    psh a           psh b
                    pshx            pshy
                    psh x           psh y

                    pula            pulb
                    pul a           pul b
                    pulx            puly
                    pul x           pul y

            AM.2.2  Branch Instructions

                    bra     label           brn     label
                    bhi     label           bls     label
                    bcc     label           bhs     label
                    bcs     label           blo     label
                    bne     label           beq     label
                    bvc     label           bvs     label
                    bpl     label           bmi     label
                    bge     label           blt     label
                    bgt     label           ble     label
                    bsr     label

            AS6811 ASSEMBLER                                       PAGE AM-3
            68HC11 INSTRUCTION SET

            AM.2.3  Single Operand Instructions

                    asla            aslb            asld
                    asl a           asl b           asl d
                    asl     []

                    asra            asrb
                    asr a           asr b
                    asr     []

                    clra            clrb
                    clr a           clr b
                    clr     label

                    coma            comb
                    com a           com b
                    com     []

                    deca            decb
                    dec a           dec b
                    dec     []

                    inca            incb
                    inc a           inc b
                    inc     []

                    lsla            lslb            lsld
                    lsl a           lsl b           lsl d
                    lsl     []

                    lsra            lsrb            lsrd
                    lsr a           lsr b           lsr d
                    lsr     []

                    nega            negb
                    neg a           neg b
                    neg     []

                    rola            rolb
                    rol a           rol b
                    rol     []

                    rora            rorb
                    ror a           ror b
                    ror     []

                    tsta            tstb
                    tst a           tst b
                    tst     []

            AS6811 ASSEMBLER                                       PAGE AM-4
            68HC11 INSTRUCTION SET

            AM.2.4  Double Operand Instructions

                    adca    []              adcb    []
                    adc a   []              adc b   []

                    adda    []      addb    []      addd    []
                    add a   []      add b   []      add d   []

                    anda    []              andb    []
                    and a   []              and b   []

                    bita    []              bitb    []
                    bit a   []              bit b   []

                    cmpa    []              cmpb    []
                    cmp a   []              cmp b   []

                    eora    []              eorb    []
                    eor a   []              eor b   []

                    ldaa    []              ldab    []
                    lda a   []              lda b   []

                    oraa    []              orab    []
                    ora a   []              ora b   []

                    sbca    []              sbcb    []
                    sbc a   []              sbc b   []

                    staa    []              stab    []
                    sta a   []              sta b   []

                    suba    []      subb    []      subd    []
                    sub a   []      sub b   []      sub d   []

            AM.2.5  Bit Manupulation Instructions

                    bclr    [],#data
                    bset    [],#data

                    brclr   [],#data,label
                    brset   [],#data,label

            AS6811 ASSEMBLER                                       PAGE AM-5
            68HC11 INSTRUCTION SET

            AM.2.6  Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

            AM.2.7  Long Register Instructions

                    cpx     []              cpy     []

                    ldd     []              lds     []
                    ldx     []              ldy     []

                    std     []              sts     []
                    stx     []              sty     []

                                       APPENDIX AN

                                 AS68(HC[S])12 ASSEMBLER

            AN.1  PROCESSOR SPECIFIC DIRECTIVES

               The   AS6812  assembler  supports  the  68HC(S)12  series  of
            microprocessors which includes  the  68HC(S)8xx  and  68HC(S)9xx
            series.

            AN.1.1  .hc12 Directive

            Format:

                    .hc12

            The  .hc12 directive selects the HC12 core specific cycles count
            to be output.

            AN.1.2  .hcs12 Directive

            Format:

                    .hcs12

            The  .hcs12  directive  selects  the  HCS12 core specific cycles
            count to be output.

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-2
            PROCESSOR SPECIFIC DIRECTIVES

            AN.1.3  The .__.CPU.  Variable

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values for  the  AS6812
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                        .hc12                        0
                        .hcs12                       1

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AN.2  68HC(S)12 REGISTER SET

            The  following  is  a  list  of  the 68HC(S)12 registers used by
            AS6812:

                    a,b     -       8-bit accumulators
                    d       -       16-bit accumulator <a:b>
                    x,y     -       index registers
                    sp,s    -       stack pointer
                    pc      -       program counter
                    ccr,cc  -       condition code register

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-3
            68HC(S)12 INSTRUCTION SET

            AN.3  68HC(S)12 INSTRUCTION SET

               The  following tables list all 68HC(S)12 mnemonics recognized
            by the AS6812 assembler.  The designation []  refers  to  a  re-
            quired  addressing  mode argument.  The following list specifies
            the format for each addressing mode supported by AS6812:

                    #data           immediate data
                                    byte or word data

                    ext             extended addressing

                    pg              memory page number

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    label           branch label

                    r,r1,r2         registers
                                    ccr,a,b,d,x,y,sp,pc

                    -x      x-      register indexed, pre or
                    ,-x     ,x-     post autodecrement by 1

                    n,-x    n,x-    register indexed, pre or
                                    post autodecrement by 1 - 8

                    +x      x+      register indexed, pre or
                    ,+x     ,x+     post autoincrement by 1

                    n,+x    n,x+    register indexed, pre or
                                    post autoincrement by 1 - 8

                    offset,x        register indexed addressing
                                       -16 <= offset <= 15    ---  5-bit
                                      -256 <= offset <= -17   ---  9-bit
                                        16 <= offset <= 255   ---  9-bit
                                    -32768 <= offset <= -257  --- 16-bit
                                       256 <= offset <= 32767 --- 16-bit
                                    (external definition of offset
                                     uses 16-bit mode)

                    [offset,x]      register indexed indirect addressing
                                    -32768 <= offset <= 32767 --- 16-bit

                    [,x]            register indexed indirect addressing
                                    zero offset

                    a,x             accumulator offset indexed addressing

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-4
            68HC(S)12 INSTRUCTION SET

                    [d,x]           d accumulator offset indexed
                                    indirect addressing

            The  terms  data, dir, label, offset, and ext may all be expres-
            sions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to  the  68HC(S)12  technical  data  for  valid
            modes.

            AN.3.1  Inherent Instructions

                    aba             bgnd            cba
                    daa             dex             dey
                    ediv            edivs           emul
                    emuls           fdiv            idiv
                    idivs           inx             iny
                    mem             mul             nop
                    psha            pshb            pshc
                    pshd            pshx            pshy
                    pula            pulb            pulc
                    puld            pulx            puly
                    rev             revw            rtc
                    rti             rts             sba
                    stop            swi             tab
                    tba             wai             wav
                    wavr

            AN.3.2  Short Branch Instructions

                    bcc     label           bcs     label
                    beq     label           bge     label
                    bgt     label           bhi     label
                    bhis    label           bhs     label
                    ble     label           blo     label
                    blos    label           bls     label
                    blt     label           bmi     label
                    bne     label           bpl     label
                    bra     label           brn     label
                    bvc     label           bvs     label
                    bsr     label

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-5
            68HC(S)12 INSTRUCTION SET

            AN.3.3  Long Branch Instructions

                    lbcc    label           lbcs    label
                    lbeq    label           lbge    label
                    lbgt    label           lbhi    label
                    lbhis   label           lbhs    label
                    lble    label           lblo    label
                    lblos   label           lbls    label
                    lblt    label           lbmi    label
                    lbne    label           lbpl    label
                    lbra    label           lbrn    label
                    lbvc    label           lbvs    label

            AN.3.4  Branch on Decrement, Test, or Increment

                    dbeq    r,label         dbne    r,label
                    ibeq    r,label         ibne    r,label
                    tbeq    r,label         tbne    r,label

            AN.3.5  Bit Clear and Set Instructions

                    bclr    [],#data
                    bset    [],#data

            AN.3.6  Branch on Bit Clear or Set

                    brclr   [],#data,label
                    brset   [],#data,label

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-6
            68HC(S)12 INSTRUCTION SET

            AN.3.7  Single Operand Instructions

                    asla            aslb
                    asl     []

                    asra            asrb
                    asr     []

                    clra            clrb
                    clr     []

                    coma            comb
                    com     []

                    deca            decb
                    dec     []

                    inca            incb
                    inc     []

                    lsla            lslb
                    lsl     []

                    lsra            lsrb
                    lsr     []

                    nega            negb
                    neg     []

                    rola            rolb
                    rol     []

                    rora            rorb
                    ror     []

                    tsta            tstb
                    tst     []

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-7
            68HC(S)12 INSTRUCTION SET

            AN.3.8  Double Operand Instructions

                    adca    []              adcb    []

                    adda    []              addb    []

                    anda    []              andb    []

                    bita    []              bitb    []

                    cmpa    []              cmpb    []

                    eora    []              eorb    []

                    ldaa    []      <=>     lda     []

                    ldab    []      <=>     ldb     []

                    oraa    []      <=>     ora     []

                    orab    []      <=>     orb     []

                    sbca    []              sbcb    []

                    staa    []      <=>     sta     []

                    stab    []      <=>     stb     []

                    suba    []              subb    []

            AN.3.9  Move Instructions

                    movb    [],[]           movw    [],[]

            AN.3.10  D-register Instructions

                    addd    []              subd    []
                    cpd     []      <=>     cmpd    []
                    ldd     []              std     []

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-8
            68HC(S)12 INSTRUCTION SET

            AN.3.11  Index/Stack Register Instructions

                    cps     []      <=>     cmps    []
                    cpx     []      <=>     cmpx    []
                    cpy     []      <=>     cmpy    []

                    lds     []
                    ldx     []              ldy     []

                    leas    []
                    leax    []              leay    []

                    sts     []
                    stx     []              sty     []

            AN.3.12  Jump and Jump/Call to Subroutine Instructions

                    call    [],pg
                    jmp     []              jsr     []

            AN.3.13  Other Special Instructions

                    emacs   []
                    emaxd   []              emaxm   []
                    emind   []              eminm   []
                    etbl    []
                    maxa    []              maxm    []
                    mina    []              minm    []
                    tbl     []              trap    #data

            AN.3.14  Register - Register Instructions

                    exg     r1,r2           sex     r1,r2
                    tfr     r1,r2

            AN.3.15  Condition Code Register Instructions

                    andcc   #data           orcc    #data

            AS68(HC[S])12 ASSEMBLER                                PAGE AN-9
            68HC(S)12 INSTRUCTION SET

            AN.3.16  M68HC11 Compatibility Mode Instructions

                    abx             aby             clc
                    cli             clv             des
                    ins             sec             sei
                    sev             tap             tpa
                    tsx             tsy             txs
                    tys             xgdx            xgdy

                                       APPENDIX AO

                                    AS6816 ASSEMBLER

            AO.1  68HC16 REGISTER SET

            The following is a list of the 68HC16 registers used by AS6816:

                    a,b     -       8-bit accumulators
                    d       -       16-bit accumulator <a:b>
                    e       -       16-bit accumulator
                    x,y,z   -       index registers
                    k       -       address extension register
                    s       -       stack pointer
                    ccr     -       condition code

            AO.2  68HC16 INSTRUCTION SET

               The  following tables list all 68HC16 mnemonics recognized by
            the AS6816 assembler.  The designation [] refers to  a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by AS6816:

                    #data           immediate data
                                    byte or word data

                    #xo,#yo         local immediate data (mac / rmac)

                    label           branch label

                    r               register
                                    ccr,a,b,d,e,x,y,z,s

                    ,x              zero offset register indexed addressing
                    ,x8
                    ,x16

                    offset,x        register indexed addressing

            AS6816 ASSEMBLER                                       PAGE AO-2
            68HC16 INSTRUCTION SET

                                         0 <= offset <= 255   ---  8-bit
                                    -32768 <= offset <= -1    --- 16-bit
                                       256 <= offset <= 32767 --- 16-bit
                                    (external definition of offset
                                     uses 16-bit mode)

                    offset,x8       unsigned 8-bit offset indexed addressing
                    offset,x16      signed 16-bit offset indexed addressing

                    e,x             accumulator offset indexed addressing

                    ext             extended addressing

                    bank            64K bank number (jmp / jsr)

            The  terms data, label, offset, bank, and ext may all be expres-
            sions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 6816 technical data for valid modes.

            AO.2.1  Inherent Instructions

                    aba             abx             aby             abz
                    ace             aced            ade             adx
                    ady             adz             aex             aey
                    aez             bgnd            cba             daa
                    ediv            edivs           emul            emuls
                    fdiv            fmuls           idiv            ldhi
                    lpstop          mul             nop             psha
                    pshb            pshmac          pula            pulb
                    pulmac          rtr             rts             sba
                    sde             sted            swi             sxt
                    tab             tap             tba             tbek
                    tbsk            tbxk            tbyk            tbzk
                    tde             tdmsk           tdp             ted
                    tedm            tekb            tem             tmer
                    tmet            tmxed           tpa             tpd
                    tskb            tsx             tsy             tsz
                    txkb            txs             txy             txz
                    tykb            tys             tyx             tyz
                    tzkb            tzs             tzx             tzy
                    wai             xgab            xgde            xgdx
                    xgdy            xgdz            xgex            xgey
                    xgez

            AS6816 ASSEMBLER                                       PAGE AO-3
            68HC16 INSTRUCTION SET

            AO.2.2  Push/Pull Multiple Register Instructions

                    pshm    r,...           pulm    r,...

            AO.2.3  Short Branch Instructions

                    bcc     label           bcs     label
                    beq     label           bge     label
                    bgt     label           bhi     label
                    bhis    label           bhs     label
                    ble     label           blo     label
                    blos    label           bls     label
                    blt     label           bmi     label
                    bne     label           bpl     label
                    bra     label           brn     label
                    bvc     label           bvs     label
                    bsr     label

            AO.2.4  Long Branch Instructions

                    lbcc    label           lbcs    label
                    lbeq    label           lbge    label
                    lbgt    label           lbhi    label
                    lbhis   label           lbhs    label
                    lble    label           lblo    label
                    lblos   label           lbls    label
                    lblt    label           lbmi    label
                    lbne    label           lbpl    label
                    lbra    label           lbrn    label
                    lbvc    label           lbvs    label
                    lbsr    label

            AO.2.5  Bit Manipulation Instructions

                    bclr    [],#data
                    bset    [],#data

                    brclr   [],#data,label
                    brset   [],#data,label

            AS6816 ASSEMBLER                                       PAGE AO-4
            68HC16 INSTRUCTION SET

            AO.2.6  Single Operand Instructions

                    asla                    aslb
                    asld                    asle
                    aslm
                    asl     []              aslw    []

                    asra                    asrb
                    asrd                    asre
                    asrm
                    asr     []              asrw    []

                    clra                    clrb
                    clrd                    clre
                                            clrm
                    clr     []              clrw    []

                    coma                    comb
                    comd                    come
                    com     []              comw    []

                    deca                    decb
                    dec     []              decw    []

                    inca                    incb
                    inc     []              incw    []

                    lsla                    lslb
                    lsld                    lsle
                    lslm
                    lsl     []              lslw    []

                    lsra                    lsrb
                    lsrd                    lsre
                    lsr     []              lsrw    []

                    nega                    negb
                    negd                    nege
                    neg     []              negw    []

                    rola                    rolb
                    rold                    role
                    rol     []              rolw    []

                    rora                    rorb
                    rord                    rore
                    ror     []              rorw    []

                    tsta                    tstb
                    tsta                    tste
                    tst     []              tstw    []

            AS6816 ASSEMBLER                                       PAGE AO-5
            68HC16 INSTRUCTION SET

            AO.2.7  Double Operand Instructions

                    adca    []              adcb    []
                    adcd    []              adce    []

                    adda    []              addb    []
                    addd    []              adde    []

                    anda    []              andb    []
                    andd    []              ande    []

                    bita    []              bitb    []

                    cmpa    []              cmpb    []
                    cpd     []              cpe     []

                    eora    []              eorb    []
                    eord    []              eore    []

                    ldaa    []              ldab    []
                    ldd     []              lde     []

                    oraa    []              orab    []
                    ord     []              ore     []

                    sbca    []              sbcb    []
                    sbcd    []              sbce    []

                    staa    []              stab    []
                    std     []              ste     []

                    suba    []              subb    []
                    subd    []              sube    []

            AO.2.8  Index/Stack Register Instructions

                    cps     []              cpx     []
                    cpy     []              cpz     []

                    lds     []              ldx     []
                    ldy     []              ldz     []

                    sts     []              stx     []
                    sty     []              stz     []

            AS6816 ASSEMBLER                                       PAGE AO-6
            68HC16 INSTRUCTION SET

            AO.2.9  Jump and Jump to Subroutine Instructions

                    jmp     bank,[]         jsr     bank,[]

            AO.2.10  Condition Code Register Instructions

                    andp    #data           orp     #data

            AO.2.11  Multiply and Accumulate Instructions

                    mac     #data           rmac    #data
                    mac     #xo,#yo         rmac    #xo,#yo

                                       APPENDIX AP

                                     AS740 ASSEMBLER

            AP.1  ACKNOWLEDGMENT

               Thanks to Uwe Steller for his contribution of the AS740 cross
            assembler.

                    Uwe Stellar
                    Uwe dot Steller at t-online dot de

               The  instruction  syntax  of  this  cross  assembler uses the
            square brackets [] to denote addressing indirection.

            AP.2  740 REGISTER SET

            The following is a list of the 740 registers used by AS740:

                    a       -       8-bit accumulator
                    x,y     -       index registers

            AP.3  740 INSTRUCTION SET

               The  following  tables  list  all 740 family mnemonics recog-
            nized by the AS740 assembler.  The designation []  refers  to  a
            required addressing mode argument.  The following list specifies
            the format for each addressing mode supported by AS740:

                    #data           immediate data byte

                    #data,*zp       immediate data to zero page

                    a               accumulator addressing

            AS740 ASSEMBLER                                        PAGE AP-2
            740 INSTRUCTION SET

                    *zp             zero page addressing
                                    (see .setdp directive)
                                    0 <= dir <= 255

                    *zp,x           zero page x addressing
                    *zp,y           zero page y addressing
                                    address = (offset + (x or y))

                    [*zp,x]         indirect x addressing
                                    0 <= offset <= 255
                                    address = 2 bytes at location
                                        [(offset + (x or y)) mod 256]

                    [*zp],y         indirect y addressing
                                    address = 2 byte value at offset
                                        plus the value of the y register

                    abs             absolute addressing (2 byte)
                    abs,x           absolute x addressing (2 byte + x)
                    abs,y           absolute y addressing (2 byte + y)

                    [abs]           indirect addressing (2 byte)

                    label           branch label

                    \special        low order byte of address 0xFFnn

                    BIT#,*zp        bit set/clear zero page
                    BIT#,A          bit set/clear accumulator

                    BIT#,*zp,label  branch on bit set/clear in zero page
                    BIT#,A,label    branch on bit set/clear in accumulator

            The terms data, zp, abs, BIT , special, and label may all be ex-
            pressions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the 740 technical data for valid modes.

            AS740 ASSEMBLER                                        PAGE AP-3
            740 INSTRUCTION SET

            AP.3.1  Inherent Instructions

                    brk                     clc
                    cld                     cli
                    clt                     clv
                    dex                     dey
                    inx                     iny
                    nop                     pha
                    php                     pla
                    plp                     rti
                    rts                     sec
                    sed                     sei
                    set                     stp
                    tax                     tay
                    tsx                     txa
                    txs                     tya
                    wit

            AP.3.2  Branch Instructions

                    bcc     label           bhs     label
                    bcs     label           blo     label
                    beq     label           bmi     label
                    bne     label           bpl     label
                    bvc     label           bvs     label
                    bra     label

            AP.3.3  Single Operand Instructions

                    asl     []
                    dec     []
                    inc     []
                    lsr     []
                    rol     []
                    ror     []

            AS740 ASSEMBLER                                        PAGE AP-4
            740 INSTRUCTION SET

            AP.3.4  Double Operand Instructions

                    adc     []
                    and     []
                    bit     []
                    cmp     []
                    eor     []
                    lda     []
                    ora     []
                    sbc     []
                    sta     []

            AP.3.5  Jump and Jump to Subroutine Instructions

                    jmp     []              jsr     []

            AP.3.6  Miscellaneous X and Y Register Instructions

                    cpx     []
                    cpy     []
                    ldx     []
                    stx     []
                    ldy     []
                    sty     []

            AP.3.7  Bit Instructions

                    bit     []
                    bbc     BIT#,[],label           bbs     BIT#,[],label
                    clb     BIT#,[]                 seb     BIT#,[]

            AP.3.8  Other Instructions

                    div     []                      mul     []
                    ldm     #imm,[]                 com     []
                    tst     []                      rrf     []

                                       APPENDIX AQ

                                    AS8048 ASSEMBLER

               AS8048  supports the 8048, 8041, 8022, and 8021 variations of
            the 8048 microprocessor family.

            AQ.1  .8048 DIRECTIVE

            Format:

                    .8048

            The .8048 directive enables processing of only the 8048 specific
            mnemonics.  8041/8022/8021 mnemonics encountered will be flagged
            with an 'o' error.

            AQ.2  .8041 DIRECTIVE

            Format:

                    .8041

            The  .8041  directive  enables  processing  of the 8041 specific
            mnemonics.  8041 mnemonics encountered without the .8041  direc-
            tive will be flagged with an 'o' error.

            AS8048 ASSEMBLER                                       PAGE AQ-2
            .8022 DIRECTIVE

            AQ.3  .8022 DIRECTIVE

            Format:

                    .8022

            The  .8022  directive  enables  processing  of the 8022 specific
            mnemonics.  8022 mnemonics encountered without the .8022  direc-
            tive will be flagged with an 'o' error.

            AQ.4  .8021 DIRECTIVE

            Format:

                    .8021

            The  .8021  directive  enables  processing  of the 8021 specific
            mnemonics.  8021 mnemonics encountered without the .8021  direc-
            tive will be flagged with an 'o' error.

            AQ.5  THE .__.CPU.  VARIABLE

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values for  the  AS8048
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                        .8048                        0
                        .8041                        1
                        .8022                        2
                        .8021                        3

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AS8048 ASSEMBLER                                       PAGE AQ-3
            8048 REGISTER SET

            AQ.6  8048 REGISTER SET

            The following is a list of the 8048 registers used by AS8048:

                    a               -       8-bit accumulator
                    r0,r1,r2,r3     -       8-bit registers
                    r4,r5,r6,r7
                    bus,p1,p2       -       bus and ports
                    p4,p5,p6,p7
                    an0,an1         -       analog input select
                    rb0,rb1         -       register bank select
                    mb0,mb1         -       memory bank select
                    c               -       carry (bit in status word)
                    clk             -       timer
                    cnt             -       counter
                    dbb             -       data bus buffer
                    f0              -       f0 bit in psw
                    f1              -       f1 bit in psw
                    i               -       interrupt
                    psw             -       program status word
                    t               -       timer register
                    tcnt            -       timer counter
                    tcnti           -       timer interrupt

            AQ.7  8048 INSTRUCTION SET

               The  following  tables  list all 8048 mnemonics recognized by
            the AS8048 assembler.  The following list specifies  the  format
            for each addressing mode supported by AS8048:

                    #data           immediate data
                                    byte or word data

                    r               register r0,r1
                    rn              register r0,r1,r2,r3,r4,r5,r6, or r7

                    @r              indirect on register r0 or r1
                    @a              indirect on accumulator

                    addr            direct memory address
                    addr8           current page 8-bit jmp address

                    #data           immediate data

                    pn              ports p1 or p2
                    port            ports p1,p2 or bus
                    ep              ports p4,p5,p6, or p7

                    bus             i/o bus

            AS8048 ASSEMBLER                                       PAGE AQ-4
            8048 INSTRUCTION SET

                    s               f0 or f1 bits in psw
                    bitaddr         bit address

                    label           call or jump label

            The terms data, addr, and label may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction.  Refer to the 8048, 8041, 8022,  and  8021  technical
            data for valid modes.

            AS8048 ASSEMBLER                                       PAGE AQ-5
            8048 INSTRUCTION SET

            AQ.7.1  Alphabetical Instruction Listing

                                            8021    8022    8041    8048
                    add     a,@r            x       x       x       x
                    add     a,#data         x       x       x       x
                    add     a,rn            x       x       x       x

                    addc    a,@r            x       x       x       x
                    addc    a,#data         x       x       x       x
                    addc    a,rn            x       x       x       x

                    anl     port,#data                      x       x
                    anl     bus,#data                               x
                    anl     a,@r            x       x       x       x
                    anl     a,rn            x       x       x       x

                    anld    ep,a            x       x       x       x

                    call    addr            x       x       x       x

                    clr     a               x       x       x       x
                    clr     c               x       x       x       x
                    clr     s                               x       x

                    cpl     a               x       x       x       x
                    cpl     c               x       x       x       x
                    cpl     s                               x       x

                    daa     a               x       x       x       x

                    dec     rn                              x       x
                    dec     a               x       x       x       x

                    dis     tcnti                           x       x
                    dis     i                               x       x

                    djnz    rn,addr8        x       x       x       x

                    en      tcnti                           x       x
                    en      i                               x       x

                    ent0    clk                                     x

            AS8048 ASSEMBLER                                       PAGE AQ-6
            8048 INSTRUCTION SET

                                            8021    8022    8041    8048
                    in      a,dbb                           x
                    in      a,pn            x       x       x       x

                    inc     a               x       x       x       x
                    inc     a,@r                            x       x
                    inc     rn              x       x       x       x

                    ins     a,bus                                   x

                    jmp     addr            x       x       x       x

                    jmpp    @a              x       x       x       x

                    jb0     addr8                           x       x
                    jb1     addr8                           x       x
                    jb2     addr8                           x       x
                    jb3     addr8                           x       x
                    jb4     addr8                           x       x
                    jb5     addr8                           x       x
                    jb6     addr8                           x       x
                    jb7     addr8                           x       x

                    jc      addr8           x       x       x       x
                    jf0     addr8                           x       x
                    jf1     addr8                           x       x
                    jnc     addr8           x       x       x       x
                    jni     addr8                                   x
                    jnibf   addr8                           x
                    jnt0    addr8                           x       x
                    jnt1    addr8                           x       x
                    jnz     addr8           x       x       x       x
                    jobf    addr8                                   x
                    jtf     addr8           x       x       x       x
                    jt0     addr8                           x       x
                    jt1     addr8           x       x       x       x
                    jz      addr8           x       x       x       x

            AS8048 ASSEMBLER                                       PAGE AQ-7
            8048 INSTRUCTION SET

                                            8021    8022    8041    8048
                    mov     a,#data         x       x       x       x
                    mov     a,psw                           x       x
                    mov     a,@r            x       x       x       x
                    mov     a,rn            x       x       x       x
                    mov     a,t             x       x       x       x
                    mov     psw,a                           x       x
                    mov     rn,a            x       x       x       x
                    mov     @r,a            x       x       x       x
                    mov     rn,#data        x       x       x       x
                    mov     @r,#data        x       x       x       x
                    mov     t,a             x       x       x       x

                    movd    a,ep            x       x       x       x
                    movd    ep,a            x               x       x

                    movp    a,@a            x       x       x       x

                    movp3   a,@a                            x       x

                    movx    a,@r                                    x
                    movx    @r,a                                    x

                    nop                     x               x       x

                    orl     a,#data         x       x       x       x
                    orl     a,rn            x       x       x       x
                    orl     a,@r            x       x       x       x
                    orl     bus,#data                               x
                    orl     port,#data                      x       x

                    orld    ep,a            x       x       x       x

                    out     dbb,a                           x

                    outl    bus,a                   x
                    outl    port,a          x       x       x       x

                    rad     a                       x

                    ret                     x       x       x       x

                    retr                                    x       x

            AS8048 ASSEMBLER                                       PAGE AQ-8
            8048 INSTRUCTION SET

                                            8021    8022    8041    8048
                    rl      a               x       x       x       x

                    rlc     a               x       x       x       x

                    rr      a               x       x       x       x

                    rrc     a               x       x       x       x

                    sel     an0                     x
                    sel     an1                     x
                    sel     mb0                                     x
                    sel     mb1                                     x
                    sel     rb0                                     x
                    sel     rb1                                     x

                    swap    a               x       x       x       x

                    stop    tcnt            x       x       x       x
                    strt    cnt             x       x       x       x
                    strt    t               x       x       x       x

                    xch     a,@r            x       x       x       x

                    xchd    a,@r            x       x       x       x

                    xrl     a,@r            x       x       x       x

                    xrl     a,#data         x       x       x       x

                    xch     a,rn            x       x       x       x

                    xrl     a,rn            x       x       x       x

                                       APPENDIX AR

                                    AS8051 ASSEMBLER

            AR.1  ACKNOWLEDGMENT

               Thanks  to  John  Hartman  for his contribution of the AS8051
            cross assembler.

                    John L. Hartman
                    jhartman at compuserve dot com
                    noice at noicedebugger dot com

            AR.2  8051 REGISTER SET

            The following is a list of the 8051 registers used by AS8051:

                    a,b             -       8-bit accumulators
                    r0,r1,r2,r3     -       8-bit registers
                    r4,r5,r6,r7
                    dptr            -       data pointer
                    sp              -       stack pointer
                    pc              -       program counter
                    psw             -       status word
                    c               -       carry (bit in status word)

            AS8051 ASSEMBLER                                       PAGE AR-2
            8051 REGISTER SET

            AR.3  8051 INSTRUCTION SET

               The  following  tables  list all 8051 mnemonics recognized by
            the AS8051 assembler.  The following list specifies  the  format
            for each addressing mode supported by AS8051:

                    #data           immediate data
                                    byte or word data

                    r,r1,r2         register r0,r1,r2,r3,r4,r5,r6, or r7

                    @r              indirect on register r0 or r1
                    @dptr           indirect on data pointer
                    @a+dptr         indirect on accumulator
                                    plus data pointer
                    @a+pc           indirect on accumulator
                                    plus program counter

                    addr            direct memory address

                    bitaddr         bit address

                    label           call or jump label

            The terms data, addr, bitaddr, and label may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction.  Refer to the 8051 technical data for valid modes.

            AR.3.1  Inherent Instructions

                    nop

            AS8051 ASSEMBLER                                       PAGE AR-3
            8051 INSTRUCTION SET

            AR.3.2  Move Instructions

                    mov     a,#data         mov     a,addr
                    mov     a,r             mov     a,@r

                    mov     r,#data         mov     r,addr
                    mov     r,a

                    mov     addr,a          mov     addr,#data
                    mov     addr,r          mov     addr,@r
                    mov     addr1,addr2     mov     bitaddr,c

                    mov     @r,#data        mov     @r,addr
                    mov     @r,a

                    mov     c,bitaddr
                    mov     dptr,#data

                    movc    a,@a+dptr       movc    a,@a+pc
                    movx    a,@dptr         movx    a,@r
                    movx    @dptr,a         movx    @r,a

            AR.3.3  Single Operand Instructions

                    clr     a               clr     c
                    clr     bitaddr
                    cpl     a               cpl     c
                    cpl     bitaddr
                    setb    c               setb    bitaddr

                    da      a
                    rr      a               rrc     a
                    rl      a               rlc     a
                    swap    a

                    dec     a               dec     r
                    dec     @r
                    inc     a               inc     r
                    inc     dptr            inc     @r

                    div     ab              mul     ab

                    pop     addr            push    addr

            AS8051 ASSEMBLER                                       PAGE AR-4
            8051 INSTRUCTION SET

            AR.3.4  Two Operand Instructions

                    add     a,#data         add     a,addr
                    add     a,r             add     a,@r
                    addc    a,#data         addc    a,addr
                    addc    a,r             addc    a,@r
                    subb    a,#data         subb    a,addr
                    subb    a,r             subb    a,@r
                    orl     a,#data         orl     a,addr
                    orl     a,r             orl     a,@r
                    orl     addr,a          orl     addr,#data
                    orl     c,bitaddr       orl     c,/bitaddr
                    anl     a,#data         anl     a,addr
                    anl     a,r             anl     a,@r
                    anl     addr,a          anl     addr,#data
                    anl     c,bitaddr       anl     c,/bitaddr
                    xrl     a,#data         xrl     a,addr
                    xrl     a,r             xrl     a,@r
                    xrl     addr,a          xrl     addr,#data
                    xrl     c,bitaddr       xrl     c,/bitaddr
                    xch     a,addr          xch     a,r
                    xch     a,@r            xchd    a,@r

            AR.3.5  Call and Return Instructions

                    acall   label           lcall   label
                    ret                     reti
                    in      data
                    out     data
                    rst     data

            AR.3.6  Jump Instructions

                    ajmp    label
                    cjne    a,#data,label   cjne    a,addr,label
                    cjne    r,#data,label   cjne    @r,#data,label
                    djnz    r,label         djnz    addr,label
                    jbc     bitadr,label
                    jb      bitadr,label    jnb     bitadr,label
                    jc      label           jnc     label
                    jz      label           jnz     label
                    jmp     @a+dptr
                    ljmp    label           sjmp    label

            AS8051 ASSEMBLER                                       PAGE AR-5
            8051 INSTRUCTION SET

            AR.3.7  Predefined Symbols:  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    FC                                          FF
                    F8                                          FB
                    F4                                          F7
                    F0      B                                   F3
                    EC                                          EF
                    E8                                          EB
                    E4                                          E7
                    E0      ACC                                 E3
                    DC                                          DF
                    D8                                          DB
                    D4                                          D7
                    D0      PSW                                 D3
                    CC   [  TL2     TH2                     ]   CF
                    C8   [  T2CON           RCAP2L  RCAP2H  ]   CB
                    C4                                          C7
                    C0                                          C3
                    BC                                          BF
                    B8      IP                                  BB
                    B4                                          B7
                    B0      P3                                  B3
                    AC                                          AF
                    A8      IE                                  AB
                    A4                                          A7
                    A0      P2                                  A3
                    9C                                          9F
                    98      SCON    SBUF                        9B
                    94                                          97
                    90      P1                                  93
                    8C      TH0     TH1                         8F
                    88      TCON    TMOD    TL0     TL1         8B
                    84                              PCON        87
                    80      P0      SP      DPL     DPH         83

                    [...] Indicates Resident in 8052, not 8051
                    A is an allowed alternate for ACC.

            AS8051 ASSEMBLER                                       PAGE AR-6
            8051 INSTRUCTION SET

            AR.3.8  Predefined Symbols:  SFR Bit Addresses

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    FC                                          FF
                    F8                                          FB
                    F4      B.4     B.5     B.6     B.7         F7
                    F0      B.0     B.1     B.2     B.3         F3
                    EC                                          EF
                    E8                                          EB
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
                    E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    DC                                          DF
                    D8                                          DB
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
                    D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    CC   [  T2CON.4 T2CON.5 T2CON.6 T2CON.7 ]   CF
                    C8   [  T2CON.0 T2CON.1 T2CON.2 T2CON.3 ]   CB
                    C4                                          C7
                    C0                                          C3
                    BC      IP.4    IP.5    IP.6    IP.7        BF
                    B8      IP.0    IP.1    IP.2    IP.3        BB
                    B4      P3.4    P3.5    P3.6    P3.7        B7
                    B0      P3.0    P3.1    P3.2    P3.3        B3
                    AC      IE.4    IE.5    EI.6    IE.7        AF
                    A8      IE.0    IE.1    IE.2    IE.3        AB
                    A4      P2.4    P2.5    P2.6    P2.7        A7
                    A0      P2.0    P2.1    P2.2    P2.3        A3
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F
                    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    94      P1.4    P1.5    P1.6    P1.7        97
                    90      P1.0    P1.1    P1.2    P1.3        93
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
                    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    84      P0.4    P0.5    P0.6    P0.7        87
                    80      P0.0    P0.1    P0.2    P0.3        83

                    [...] Indicates Resident in 8052, not 8051
                    A is an allowed alternate for ACC.

            AS8051 ASSEMBLER                                       PAGE AR-7
            8051 INSTRUCTION SET

            AR.3.9  Predefined Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    FC                                          FF
                    F8                                          FB
                    F4                                          F7
                    F0                                          F3
                    EC                                          EF
                    E8                                          EB
                    E4                                          E7
                    E0                                          E3
                    DC                                          DF
                    D8                                          DB
                    D4      RS1     F0      AC      CY          D7
                    D0      P               OV      RS0         D3
                    CC   [  TLCK    RCLK    EXF2    TF2     ]   CF
                    C8   [  CPRL2   CT2     TR2     EXEN2   ]   CB
                    C4                                          C7
                    C0                                          C3
                    BC      PS      PT2                         BF
                    B8      PX0     PT0     PX1     PT1         BB
                    B4                                          B7
                    B0      RXD     TXD     INT0    INT1        B3
                    AC      ES      ET2             EA          AF
                    A8      EX0     ET0     EX1     ET1         AB
                    A4                                          A7
                    A0                                          A3
                    9C      REN     SM2     SM1     SM0         9F
                    98      RI      TI      RB8     TB8         9B
                    94                                          97
                    90                                          93
                    8C      TR0     TF0     TR1     TF1         8F
                    88      IT0     IE0     IT1     IE1         8B
                    84                                          87
                    80                                          83

                    [...] Indicates Resident in 8052, not 8051

                                       APPENDIX AS

                                    AS8085 ASSEMBLER

            AS.1  8085 REGISTER SET

            The  following  is  a  list  of  the 8080/8085 registers used by
            AS8085:

                    a,b,c,d,e,h,l   -       8-bit accumulators
                    m               -       memory through (hl)
                    sp              -       stack pointer
                    psw             -       status word

            AS.2  8085 INSTRUCTION SET

               The  following tables list all 8080/8085 mnemonics recognized
            by the AS8085  assembler.   The  following  list  specifies  the
            format for each addressing mode supported by AS8085:

                    #data           immediate data
                                    byte or word data

                    r,r1,r2         register or register pair
                                    psw,a,b,c,d,e,h,l
                                    bc,de,hl,sp,pc

                    m               memory address using (hl)

                    addr            direct memory addressing

                    label           call or jump label

            The terms data, m, addr, and label may be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to  the  8080/8085  technical  data  for  valid
            modes.

            AS8085 ASSEMBLER                                       PAGE AS-2
            8085 INSTRUCTION SET

            AS.2.1  Inherent Instructions

                    cma             cmc
                    daa             di
                    ei              hlt
                    nop             pchl
                    ral             rar
                    ret             rim
                    rrc             rlc
                    sim             sphl
                    stc             xchg
                    xthl

            AS.2.2  Register/Memory/Immediate Instructions

                    adc     r       adc     m       aci     #data
                    add     r       add     m       adi     #data
                    ana     r       ana     m       ani     #data
                    cmp     r       cmp     m       cpi     #data
                    ora     r       ora     m       ori     #data
                    sbb     r       sbb     m       sbi     #data
                    sub     r       sub     m       sui     #data
                    xra     r       xra     m       xri     #data

            AS.2.3  Call and Return Instructions

                    cc      label           rc
                    cm      label           rm
                    cnc     label           rnc
                    cnz     label           rnz
                    cp      label           rp
                    cpe     label           rpe
                    cpo     label           rpo
                    cz      label           rz
                    call    label

            AS.2.4  Jump Instructions

                    jc      label
                    jm      label
                    jnc     label
                    jnz     label
                    jp      label
                    jpe     label
                    jpo     label
                    jz      label
                    jmp     label

            AS8085 ASSEMBLER                                       PAGE AS-3
            8085 INSTRUCTION SET

            AS.2.5  Input/Output/Reset Instructions

                    in      data
                    out     data
                    rst     data

            AS.2.6  Move Instructions

                    mov     r1,r2
                    mov     r,m
                    mov     m,r

                    mvi     r,#data
                    mvi     m,#data

            AS.2.7  Other Instructions

                    dcr     r               dcr     m
                    inr     r               inr     m

                    dad     r               dcx     r
                    inx     r               ldax    r
                    pop     r               push    r
                    stax    r

                    lda     addr            lhld    addr
                    shld    addr            sta     addr

                    lxi     r,#data

            AS.2.8  Unspecified Instructions

                    arhl
                    dsub

                    jnx5    addr
                    jx5     addr

                    ldhi    #data
                    ldsi    #data

                    lhlx
                    rdel
                    rstv
                    shlx

            AS8085 ASSEMBLER                                       PAGE AS-4
            8085 INSTRUCTION SET

            AS.3  UNSPECIFIED OPCODE ARTICLE

            Engineer's Notebook,
            "Electronics" magazine, 1980

            ----------------------------

            Unspecified 8085 Op Codes Enhance Programming

            by Wolfgang Dehnhardt and Villy M. Sorenson
            GSI, Dermstat, and Sorenson Software,
            Seeheim, West Germany

            ----------------------------

               Ten  operating  codes and two flag bits previously unknown to
            most users of the 8085 microprocessor will enable programmers to
            write  more efficient routines.  The new members of the instruc-
            tion set, which were stumbled upon  during  the  testing  of  an
            assembler-disassembler  module,  include  seven opcodes that in-
            volve the processing of register pairs, two  that  involve  jump
            operations  with  one  new  flag, and one that performs a condi-
            tional restart on the overflow indication of the other flag bit.

               The   seven  register  pair  instructions  (all  with  16-bit
            operands) consist of a double subtraction, a  rotate,  a  shift,
            indirect  loading  and  storing of a word, and two offset opera-
            tions.  Either BC, DE, HL, or SP  are  the  designated  register
            pairs used in these opcodes.

               The  mnemonic names of the instructions have been selected to
            be compatible with the 8085's existing mnemonics.  In the double
            subtraction  (DSUB),  register  pair  BC  is subtracted from HL.
            This instruction thus performs the opposite task  of  DAD  B,  a
            well-known  instruction.   The instruction RDEL rotates register
            pair DE left 1 bit through the carry.   ARHL  is  an  arithmetic
            shift  to  the right of HL.  It serves to divide HL by 2, except
            in cases where HL is -1.

               All  16  bits of register pair HL can be stored indirectly at
            the address contained in the DE pair by  specifying  instruction
            SHLX.  To load HL, LHLX must be employed.

               As  an example of how this instruction can be used to cut in-
            struction steps, consider the common sequence used for a routine
            table  jump  shown  in part (a) of the figure.  By assigning the

            AS8085 ASSEMBLER                                       PAGE AS-5
            UNSPECIFIED OPCODE ARTICLE

            register DE for HL and using the LHLX instruction, this sequence
            can  be  replaced  by  the much simpler arrangement shown at the
            bottom of part (a).

               As  for  adding  the contents of register pairs with an addi-
            tional byte (offset), DE can be loaded with HL plus the byte  by
            selecting  the instruction LDHI, which simplifies array address-
            ing.  Usually, the architecture of the 8080-type systems dictate
            addressing  of  arrays  in  what  are called pages of 256 bytes.
            This restriction means that the starting  address  of  an  array
            must  be placed near the beginning of a page.  A typical call is
            shown in part (b) of the figure.

               The  page  limitation  is by passed using th LDHI instruction
            code and constant indexes.  The starting address  of  the  array
            can  now  be  placed anywhere, and addressing occurs as shown at
            the bottom of part (b).

               An  additional  byte can be combined with register pair SP in
            DE if  instruction  LDSI  is  specified.   This  instruction  is
            designed  for  operating system routines that transfer arguments
            on the stack.  An example sequence, shown in (c), stores HL into
            a  16-bit  word  located as the second item below the top of the
            stack.

               The  jump  and  restart instructions work in conjunction with
            the two discoverd flag bits, X5 and V.  Op codes  JX5  and  JNX5
            jump depending on the state of th X5 flag.  Op code RSTV makes a
            restart call to hexidecimal address 40 if the  V  flag  is  set;
            otherwise it functions as a no-operation instruction.

               Flag  bit V indicates a 2's complement overflow condition for
            8- and 16-bit arithmetic operations.  Flag bit X5 has been named
            for  its  position  in  the  condition code byte and not for its
            function.  It does not resemble any normal flag bit.   The  only
            use  for this bit found thus far are as an unsigned overflow in-
            dicator resulting from a data change of FFFF to 0000 on  execut-
            ing DCX.

               The new 8085 instructions are outlined in the table.

            AS8085 ASSEMBLER                                       PAGE AS-6
            UNSPECIFIED OPCODE ARTICLE

            Figure:

                ------------------------------------------------------|
                |  part (a)                                           |
                | |-------------------------------------------------| |
                | | Sourec Statement |           Comment            | |
                | |-------------------------------------------------| |
                | |    MOV   E,M     |  ;Routine ADR Low Byte       | |
                | |    INX   H       |  ;HL = Table ADR             | |
                | |    MOV   D,M     |  ;Routine ADR High Byte      | |
                | |    XCHG          |  ;DE = Routine ADR           | |
                | |    PCHL          |  ;Go to Routine ADR          | |
                | |----                                         ----| |
                |                       ||                            |
                |                       \/                            |
                | |----                                         ----| |
                | |    LHLX          |  ;DE = Table ADR             | |
                | |    PCHL          |  ;HL = Routine ADR           | |
                | |-------------------------------------------------| |
                |                                                     |
                |  part (b)                                           |
                | |-------------------------------------------------| |
                | | Sourec Statement |           Comment            | |
                | |-------------------------------------------------| |
                | |    LXI   H,ARRAY |  ;ARRAY Base ADR             | |
                | |    MVI   L,INDEX |  ;8-Bit INDEX, HL=ARRAY ADR  | |
                | |----                                         ----| |
                |                       ||                            |
                |                       \/                            |
                | |----                                         ----| |
                | |    LXI   H,ARRAY |  ;ARRAY Base ADR             | |
                | |    LDHI  L,INDEX |  ;8-Bit INDEX, HL=ARRAY ADR  | |
                | |-------------------------------------------------| |
                |                                                     |
                |  part (c)                                           |
                | |-------------------------------------------------| |
                | | Sourec Statement |           Comment            | |
                | |-------------------------------------------------| |
                | |    LDSI  2       |  ;DE = SP + 2                | |
                | |    SHLX          |  ;Replace 2, Item on Stack   | |
                | |-------------------------------------------------| |
                |                                                     |
                | Options.   Newly discovered operating codes for     |
                | 8085 shown in table enables the writing of more     |
                | efficient programs. Program for table jump (a, top) |
                | can be reduced significantly when new instructions  |
                | (a, bottom) are implemented. Array routine (b, top) |
                | can be rewritten (b, Bottom) so that arrays can be  |
                | addressed across page boundaries.  Data words can   |
                | be entered at any point in a stack register (c).    |
                ------------------------------------------------------|

            AS8085 ASSEMBLER                                       PAGE AS-7
            UNSPECIFIED OPCODE ARTICLE

            Table:

                -----------------------------------
                |    Condition  Code  Format      |
                -----------------------------------
                |  S   Z  X5  AC   O   P   V  CY  |
                -----------------------------------

                New Condition Codes:

                V  = Bit 1     2's complement overflow
                X5 = bit 5     Underflow (DCX) or Overflow (INX)
                               X5 = O1*O2 + O1*R + O2*R, where
                               * == AND, + == OR
                               O1 = sign of operand 1
                               O2 = sign of operand 2
                               R  = sign of result.
                               For subtraction and comparisons
                               replace O2 with ~O2.

              DSUB   (double subtraction)

                (H)(L)=(H)(L)-(B)(C)
                The contents of register pair B and C are subtracted
                from the contents of register pair H and L. The
                result is placed in register pair H and L. All
                condition flags are affected.

                  ---------------------
                  [  0 0 0 0 1 0 0 0  ]                (08)
                  ---------------------

                  cycles:          3
                  states:         10
                  addressing:     register
                  flags:          Z,S,P,CY,AC,X5,V

            AS8085 ASSEMBLER                                       PAGE AS-8
            UNSPECIFIED OPCODE ARTICLE

              ARHL    (arithmetic shift of H and L to the right)

                (H7=H7);(Hn-1)=(Hn)
                (L7=H0);(Ln-1)=(Ln);(CY)=(L0)
                The contents of register pair H and L are shifted
                right one bit. The uppermost bit is duplicated and
                the lowest bit is shifted into the carry bit.
                The result is placed in register pair H and L.
                Note: only the CY flag is affected.

                  ---------------------
                  [  0 0 0 1 0 0 0 0  ]                (10)
                  ---------------------

                  cycles:         3
                  states:         7
                  addressing:     register
                  flags:          CY

              RDEL    (rotate D and E left through carry)

                (Dn+1)=(Dn);(D0)=(E7)
                (CY)=(D7);(En+1)=(En);(E0)=(CY)
                The contents of register pair D and E are rotated
                left one position through the carry flag. The low
                order bit is set equal to the CY flag and the CY
                flag is set to the value shifted out of the
                high-order bit. Only the CY and V flags are
                affected.

                   ---------------------
                   [  0 0 0 1 1 0 0 0  ]                (18)
                   ---------------------

                  cycles:           3
                  states:          10
                  addressing:      register
                  flags:           CY, V

            AS8085 ASSEMBLER                                       PAGE AS-9
            UNSPECIFIED OPCODE ARTICLE

              LDHI    (load D and E with H and L plus immediate byte)

                (D)(E)=((H)(L)+(byte 2)
                The contents of register pair H and L are added to
                the immediate byte. The result is placed in
                register pair D and E.
                Note: no condition flags are affected.

                   ---------------------
                   [  0 0 1 0 1 0 0 0  ]                (28)
                   ---------------------
                   [       data        ]
                   ---------------------

                  cycles:           3
                  states:          10
                  addressing:      immediate register
                  flags:           none

              LDSI    (load D and E with SP plus immediate bytey)

                (D)(E);(D0)=(E7)
                (CY)=(D7);(SPH)(SPL)+(byte 2)
                The contents of register pair H and L are added to
                the immediate byte. The result is placed in
                register pair D and E.
                Note: no condition flags are affected.

                   ---------------------
                   [  0 0 1 1 1 0 0 0  ]                (38)
                   ---------------------
                   [       data        ]
                   ---------------------

                  cycles:           3
                  states:          10
                  addressing:      immediate register
                  flags:           none

            AS8085 ASSEMBLER                                      PAGE AS-10
            UNSPECIFIED OPCODE ARTICLE

              RSTV    (restart on overflow)

                if (V):
                   ((SP)-1))=(PCH)
                   ((SP)-2))=(PCL)
                   (SP)=(SP)-2
                   (PC)=40 hex
                If the overflow flag V is set, the actions
                specified above are performed; otherwise
                control continues sequentially.

                   ---------------------
                   [  1 1 0 0 1 0 1 1  ]                (CB)
                   ---------------------

                  cycles:          1 or 3
                  states:          6 or 12
                  addressing:      register indirect
                  flags:           none

              SHLX    (store H and L indirect through D and E)

                ((D)(E))=(L)
                ((D)(E)+1)=(H)
                The contents of register L are moved to the
                memory-location whose address is in register pair
                D and E. The contents of register H are moved to
                the succeeding memory location.

                   ---------------------
                   [  1 1 0 1 1 0 0 1  ]                (D9)
                   ---------------------

                  cycles:           3
                  states:          10
                  addressing:      register indirect
                  flags:           none

            AS8085 ASSEMBLER                                      PAGE AS-11
            UNSPECIFIED OPCODE ARTICLE

              JNX5    (jump on not X5)

                if (not X5)
                   (PC)=(byte 3)(byte 2)

                If the X5 flag is reset, control is transferred to
                the instruction whose address is specified in byte
                3 and byte 2 of the current instruction; otherwise
                control continues sequentially.

                   ---------------------
                   [  1 1 0 1 1 1 0 1  ]                (DD)
                   ---------------------
                   [  lo-order address ]
                   ---------------------
                   [  hi-order address ]
                   ---------------------

                  cycles:          2 or 3
                  states:          7 or 10
                  addressing:      immediate
                  flags:           none

              LHLX    (load H and L indirect through D and E))

                (L)=((D)(E))
                (H)=((D)(E)+1)
                The content of the memory location whose address
                is in D and E, are moved to register L. The
                contents of the succeeding memory location are
                moved to register H.

                   ---------------------
                   [  1 1 1 0 1 1 0 1  ]                (ED)
                   ---------------------

                  cycles:           3
                  states:          10
                  addressing:      register indirect
                  flags:           none

            AS8085 ASSEMBLER                                      PAGE AS-12
            UNSPECIFIED OPCODE ARTICLE

              JX5     (jump on X5)

                if (X5)
                   (PC)=(byte 3)(byte 2)

                If the X5 flag is set, control is transferred to
                the instruction whose address is specified in byte
                3 and byte 2 of the current instruction; otherwise
                control continues sequentially.

                   ---------------------
                   [  1 1 1 1 1 1 0 1  ]                (FD)
                   ---------------------
                   [  lo-order address ]
                   ---------------------
                   [  hi-order address ]
                   ---------------------

                  cycles:          2 or 3
                  states:          7 or 10
                  addressing:      immediate
                  flags:           none

                                       APPENDIX AT

                                   AS8XCXXX ASSEMBLER

            AT.1  ACKNOWLEDGMENTS

               Thanks to Bill McKinnon for his contributions to the AS8XCXXX
            cross assembler.

                    Bill McKinnon
                    w_mckinnon at conknet dot com

               This  assembler  was  derived from the AS8051 cross assembler
            contributed by John Hartman.

                    John L. Hartman
                    jhartman at compuserve dot com
                    noice at noicedebugger dot com

            AT.2  AS8XCXXX ASSEMBLER DIRECTIVES

            AT.2.1  Processor Selection Directives

               The  AS8XCXXX  assembler  contains  directives to specify the
            processor core SFR (Special Function Registers) and  enable  the
            SFR  Bit  Register values during the assembly process.  The fol-
            lowing directives are supported:

                    .DS8XCXXX               ;80C32 core
                    .DS80C310               ;Dallas Semiconductor
                    .DS80C320               ;Microprocessors
                    .DS80C323
                    .DS80C390
                    .DS83C520
                    .DS83C530

            AS8XCXXX ASSEMBLER                                     PAGE AT-2
            AS8XCXXX ASSEMBLER DIRECTIVES

                    .DS83C550
                    .DS87C520
                    .DS87C530
                    .DS87C550

            The invocation of one of the processor directives creates a pro-
            cessor specific symbol and an SFR-Bits symbol.  For example  the
            directive

                    .DS80C390

            creates  the  global  symbols '__DS80C390' and '__SFR_BITS' each
            with a value of 1.  If the microprocessor core selection  direc-
            tive  is  followed  by  an  optional  argument  then  the symbol
            '__SFR_BITS' is given the  value  of  the  argument.   The  file
            DS8XCXXX.SFR  contains  the  SFR and SFR register bit values for
            all the microprocessor selector directives.  This  file  may  be
            modified to create a new SFR for other microprocessor types.

               If a microprocessor selection directive is not specified then
            no processor symbols will be defined.  This mode allows the  SFR
            and SFR register bit values to be defined by the assembly source
            file.

            AT.2.2  .cpu Directive

               The  .cpu  directive  is  similar  to the processor selection
            directives.  This directive defines a  new  processor  type  and
            creates a user defined symbol:

                    .cpu    "CP84C331"      2

               creates  the  symbol  '__CP84C331'  with a value of 1 and the
            symbol '__SFR_BITS' with a value of 2.  These values can be used
            to  select  the  processor SFR and SFR register bits from an in-
            clude file.  If the optional final argument, 2, is omitted  then
            the value of the symbol '__SFR_BITS' is 1.

            AS8XCXXX ASSEMBLER                                     PAGE AT-3
            AS8XCXXX ASSEMBLER DIRECTIVES

            AT.2.3  Processor Addressing Range Directives

               If one of the .DS8...  microprocessor selection directives is
            not specified then the following address range assembler  direc-
            tives are accepted:

                    .16bit                  ;16-Bit Addressing
                    .24bit                  ;24-Bit Addressing
                    .32bit                  ;32-Bit Addressing

            These  directives specify the assembler addressing space and ef-
            fect the output format for the .lst, .sym, and .rel files.

               The  default  addressing space for defined microprocessors is
            16-Bit except for the DS80C390 microprocessor which is 24-Bit.

               The  .cpu  directive  defaults to the 16-Bit addressing range
            but this can be changed using these directives.

            AT.2.4  The .__.CPU.  Variable

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values for the AS8XCXXX
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                      .cpu                           0

                      .DS8XCXXX                      1
                      .DS80C310                      2
                      .DS80C320                      3
                      .DS80C323                      4
                      .DS80C390                      5
                      .DS83C520                      6
                      .DS83C530                      7
                      .DS83C550                      8
                      .DS87C520                      9
                      .DS87C530                     10
                      .DS87C550                     11

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

            AS8XCXXX ASSEMBLER                                     PAGE AT-4
            AS8XCXXX ASSEMBLER DIRECTIVES

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AT.2.5  DS80C390 Addressing Mode Directive

               The  DS80C390  microprocessor  supports 16-Bit and 24-Bit ad-
            dressing modes.   The  .amode  assembler  directive  provides  a
            method  to  select  the addressing mode used by the ajmp, acall,
            ljmp, and lcall instructions.  These four  instructions  support
            16  and  24 bit addressing modes selected by bits AM0 and AM1 in
            the ACON register.  The assembler is 'informed'  about  the  ad-
            dressing mode selected by using the .amode directive:

                    .amode  2       ;mode 2 is 24-bit addressing

            If  a  second  argument  is specified and its value is non-zero,
            then a three instruction sequence is inserted at the .amode  lo-
            cation loading the mode bits into the ACON register:

                    .amode  2,1     ;mode 2 is 24-bit addressing, load ACON
                    ;mov    ta,#0xAA
                    ;mov    ta,#0x55
                    ;mov    acon,#amode

            AT.2.6  The .msb Directive

               The .msb directive is available in the AS8XCXXX assembler.

               The  assembler operator '>' selects the upper byte (MSB) when
            included in an assembler  instruction.   The  default  assembler
            mode  is  to  select bits <15:8> as the MSB.  The .msb directive
            allows the programmer to specify a particular byte as the  'MSB'
            when the address space is larger than 16-bits.

               The assembler directive   .msb n  configures the assembler to
            select a particular byte as MSB.  Given a 24-bit address of  Nmn
            (N(2) is <23:16>, m(1) is <15:8>, and n(0) is <7:0>) the follow-
            ing examples show how to select a particular address byte:

                    .msb 1          ;select byte 1 of address
                                    ;<M(3):N(2):m(1):n(0)>
                    LD A,>MNmn      ;byte m <15:8> ==>> A

            AS8XCXXX ASSEMBLER                                     PAGE AT-5
            AS8XCXXX ASSEMBLER DIRECTIVES

                    ...

                    .msb 2          ;select byte 2 of address
                                    ;<M(3):N(2):m(1):n(0)>
                    LD A,>MNmn      ;byte N <23:16> ==>> A
                    ...

            AS8XCXXX ASSEMBLER                                     PAGE AT-6
            AS8XCXXX ASSEMBLER DIRECTIVES

            AT.3  DS8XCXXX REGISTER SET

            The  AS8XCXXX  cross assembler supports the Dallas Semiconductor
            DS8XCXXX series of 8051-compatible devices.  These  microproces-
            sors  retain  instruction set and object code compatability with
            the 8051 microprocessor.  The DS8XCXXX family  is  updated  with
            several   new  peripherals  while  providing  all  the  standard
            features of the 80C32 microprocessor.

               The following is a list of the registers used by AS8XCXXX:

                    a,b             -       8-bit accumulators
                    r0,r1,r2,r3     -       8-bit registers
                    r4,r5,r6,r7
                    dptr            -       data pointer
                    sp              -       stack pointer
                    pc              -       program counter
                    psw             -       status word
                    c               -       carry (bit in status word)

            AT.4  DS8XCXXX INSTRUCTION SET

               The  following  tables list all DS8XCXXX mnemonics recognized
            by the AS8XCXXX assembler.  The  following  list  specifies  the
            format for each addressing mode supported by AS8XCXXX:

                    #data           immediate data
                                    byte or word data

                    r,r1,r2         register r0,r1,r2,r3,r4,r5,r6, or r7

                    @r              indirect on register r0 or r1
                    @dptr           indirect on data pointer
                    @a+dptr         indirect on accumulator
                                    plus data pointer
                    @a+pc           indirect on accumulator
                                    plus program counter

                    addr            direct memory address

                    bitaddr         bit address

                    label           call or jump label

            The terms data, addr, bitaddr, and label may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction.  Refer to  the  DS8XCXXX  technical  data  for  valid
            modes.

            AS8XCXXX ASSEMBLER                                     PAGE AT-7
            DS8XCXXX INSTRUCTION SET

            AT.4.1  Inherent Instructions

                    nop

            AT.4.2  Move Instructions

                    mov     a,#data         mov     a,addr
                    mov     a,r             mov     a,@r

                    mov     r,#data         mov     r,addr
                    mov     r,a

                    mov     addr,a          mov     addr,#data
                    mov     addr,r          mov     addr,@r
                    mov     addr1,addr2     mov     bitaddr,c

                    mov     @r,#data        mov     @r,addr
                    mov     @r,a

                    mov     c,bitaddr
                    mov     dptr,#data

                    movc    a,@a+dptr       movc    a,@a+pc
                    movx    a,@dptr         movx    a,@r
                    movx    @dptr,a         movx    @r,a

            AT.4.3  Single Operand Instructions

                    clr     a               clr     c
                    clr     bitaddr
                    cpl     a               cpl     c
                    cpl     bitaddr
                    setb    c               setb    bitaddr

                    da      a
                    rr      a               rrc     a
                    rl      a               rlc     a
                    swap    a

                    dec     a               dec     r
                    dec     @r
                    inc     a               inc     r
                    inc     dptr            inc     @r

                    div     ab              mul     ab

                    pop     addr            push    addr

            AS8XCXXX ASSEMBLER                                     PAGE AT-8
            DS8XCXXX INSTRUCTION SET

            AT.4.4  Two Operand Instructions

                    add     a,#data         add     a,addr
                    add     a,r             add     a,@r
                    addc    a,#data         addc    a,addr
                    addc    a,r             addc    a,@r
                    subb    a,#data         subb    a,addr
                    subb    a,r             subb    a,@r
                    orl     a,#data         orl     a,addr
                    orl     a,r             orl     a,@r
                    orl     addr,a          orl     addr,#data
                    orl     c,bitaddr       orl     c,/bitaddr
                    anl     a,#data         anl     a,addr
                    anl     a,r             anl     a,@r
                    anl     addr,a          anl     addr,#data
                    anl     c,bitaddr       anl     c,/bitaddr
                    xrl     a,#data         xrl     a,addr
                    xrl     a,r             xrl     a,@r
                    xrl     addr,a          xrl     addr,#data
                    xrl     c,bitaddr       xrl     c,/bitaddr
                    xch     a,addr          xch     a,r
                    xch     a,@r            xchd    a,@r

            AT.4.5  Call and Return Instructions

                    acall   label           lcall   label
                    ret                     reti
                    in      data
                    out     data
                    rst     data

            AT.4.6  Jump Instructions

                    ajmp    label
                    cjne    a,#data,label   cjne    a,addr,label
                    cjne    r,#data,label   cjne    @r,#data,label
                    djnz    r,label         djnz    addr,label
                    jbc     bitadr,label
                    jb      bitadr,label    jnb     bitadr,label
                    jc      label           jnc     label
                    jz      label           jnz     label
                    jmp     @a+dptr
                    ljmp    label           sjmp    label

            AS8XCXXX ASSEMBLER                                     PAGE AT-9
            DS8XCXXX INSTRUCTION SET

            AT.5  DS8XCXXX SPECIAL FUNCTION REGISTERS

               The  80C32 core Special Function Registers are selected using
            the .DS8XCXXX assembler directive.

            AT.5.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80              SP      DPL     DPH         83
                    84                              PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1                         8F
                    90      P1                                  93
                    94                                          97
                    98      SCON    SBUF                        9B
                    9C                                          9F
                    A0      P2                                  A3
                    A4                                          A7
                    A8      IE      SADDR0                      AB
                    AC                                          AF
                    B0      P3                                  B3
                    B4                                          B7
                    B8      IP      SADEN0                      BB
                    BC                                          BF
                    C0                                          C3
                    C4              STATUS                      C7
                    C8      T2CON   T2MOD   RCAP2L  RCAP2H      CB
                    CC      TL2     TH2                         CF
                    D0      PSW                                 D3
                    D4                                          D7
                    D8                                          DB
                    DC                                          DF
                    E0      ACC                                 E3
                    E4                                          E7
                    E8                                          EB
                    EC                                          EF
                    F0      B                                   F3
                    F4                                          F7
                    F8                                          FB
                    FC                                          FF

            AS8XCXXX ASSEMBLER                                    PAGE AT-10
            DS8XCXXX SPECIAL FUNCTION REGISTERS

            AT.5.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            P1      90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F
            P2      A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            P3      B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
                    C0                                          C3
                    C4                                          C7
            T2CON   C8      T2CON.0 T2CON.1 T2CON.2 T2CON.3     CB
                    CC      T2CON.4 T2CON.5 T2CON.6 T2CON.7     CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
                    D8                                          DB
                    DC                                          DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
                    E8                                          EB
                    EC                                          EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
                    F8                                          FB
                    FC                                          FF

            AS8XCXXX ASSEMBLER                                    PAGE AT-11
            DS8XCXXX SPECIAL FUNCTION REGISTERS

            AT.5.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
                    90                                          93
                    94                                          97
            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2             EA          AF
                    B0                                          B3
                    B4                                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PT2                         BF
                    C0                                          C3
                    C4                                          C7
            T2CON   C8      CPRL2   CT2     TR2     EXEN2       CB
                    CC      TCLK    RCLK    EXF2    TF2         CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
                    D8                                          DB
                    DC                                          DF
                    E0                                          E3
                    E4                                          E7
                    E8                                          EB
                    EC                                          EF
                    F0                                          F3
                    F4                                          F7
                    F8                                          FB
                    FC                                          FF

                    Alternates:

            SCON    98                                          9B
                    9C                              FE          9F
            T2CON   C8      CP_RL2  C_T2                        CB
                    CC                                          CF

            AS8XCXXX ASSEMBLER                                    PAGE AT-12
            DS8XCXXX SPECIAL FUNCTION REGISTERS

            AT.5.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            PCON    0x80    SMOD    SMOD0                       0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            STATUS  0x80            HIP     LIP                 0x10
                    0x08                                        0x01
            T2MOD   0x80                                        0x10
                    0x08                    T2OE    DCEN        0x01

            AS8XCXXX ASSEMBLER                                    PAGE AT-13
            DS8XCXXX SPECIAL FUNCTION REGISTERS

            AT.6  DS80C310 SPECIAL FUNCTION REGISTERS

               The  DS80C310  Special  Function Registers are selected using
            the .DS80C310 assembler directive.

            AT.6.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80              SP      DPL     DPH         83
                    84      DPL1    DPH1    DPS     PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1     CKCON               8F
                    90      P1      EXIF                        93
                    94                                          97
                    98      SCON    SBUF                        9B
                    9C                                          9F
                    A0      P2                                  A3
                    A4                                          A7
                    A8      IE      SADDR0                      AB
                    AC                                          AF
                    B0      P3                                  B3
                    B4                                          B7
                    B8      IP      SADEN0                      BB
                    BC                                          BF
                    C0                                          C3
                    C4              STATUS                      C7
                    C8      T2CON   T2MOD   RCAP2L  RCAP2H      CB
                    CC      TL2     TH2                         CF
                    D0      PSW                                 D3
                    D4                                          D7
                    D8      WDCON                               DB
                    DC                                          DF
                    E0      ACC                                 E3
                    E4                                          E7
                    E8      EIE                                 EB
                    EC                                          EF
                    F0      B                                   F3
                    F4                                          F7
                    F8      EIP                                 FB
                    FC                                          FF

            AS8XCXXX ASSEMBLER                                    PAGE AT-14
            DS80C310 SPECIAL FUNCTION REGISTERS

            AT.6.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            P1      90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F
            P2      A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            P3      B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
                    C0                                          C3
                    C4                                          C7
            T2CON   C8      T2CON.0 T2CON.1 T2CON.2 T2CON.3     CB
                    CC      T2CON.4 T2CON.5 T2CON.6 T2CON.7     CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
            WDCON   D8      WDCON.0 WDCON.1 WDCON.2 WDCON.3     DB
                    DC      WDCON.4 WDCON.5 WDCON.6 WDCON.7     DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
            EIE     E8      EIE.0   EIE.1   EIE.2   EIE.3       EB
                    EC      EIE.4   EIE.5   EIE.6   EIE.7       EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
            EIP     F8      EIP.0   EIP.1   EIP.2   EIP.3       FB
                    FC      EIP.4   EIP.5   EIP.6   EIP.7       FF

            AS8XCXXX ASSEMBLER                                    PAGE AT-15
            DS80C310 SPECIAL FUNCTION REGISTERS

            AT.6.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
                    90                                          93
                    94                                          97
            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2             EA          AF
                    B0                                          B3
                    B4                                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PT2                         BF
                    C0                                          C3
                    C4                                          C7
            T2CON   C8      CPRL2   CT2     TR2     EXEN2       CB
                    CC      TCLK    RCLK    EXF2    TF2         CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
            WDCON   D8                                          DB
                    DC                      POR                 DF
                    E0                                          E3
                    E4                                          E7
            EIE     E8      EX2     EX3     EX4     EX5         EB
                    EC                                          EF
                    F0                                          F3
                    F4                                          F7
            EIP     F8      PX2     PX3     PX4     PX5         FB
                    FC                                          FF

                    Alternates:

            SCON    98                                          9B
                    9C                              FE          9F
            T2CON   C8      CP_RL2  C_T2                        CB
                    CC                                          CF

            AS8XCXXX ASSEMBLER                                    PAGE AT-16
            DS80C310 SPECIAL FUNCTION REGISTERS

            AT.6.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            DPS     0x80                                        0x10
                    0x08                            SEL         0x01
            PCON    0x80    SMOD    SMOD0                       0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            CKCON   0x80                    T2M     T1M         0x10
                    0x08    T0M     MD2     MD1     MD0         0x01
            EXIF    0x80    IE5     IE4     IE3     IE2         0x10
                    0x08                                        0x01
            STATUS  0x80            HIP     LIP                 0x10
                    0x08                                        0x01
            T2MOD   0x80                                        0x10
                    0x08                    T2OE    DCEN        0x01

                    Alternates:

            PCON    0x80    SMOD_0                              0x10
                    0x08                                        0x01

            AS8XCXXX ASSEMBLER                                    PAGE AT-17
            DS80C310 SPECIAL FUNCTION REGISTERS

            AT.7  DS80C320/DS80C323 SPECIAL FUNCTION REGISTERS

               The DS80C320/DS80C323 Special Function Registers are selected
            using the .DS80C320 or DS80C323 assembler directives.

            AT.7.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80              SP      DPL     DPH         83
                    84      DPL1    DPH1    DPS     PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1     CKCON               8F
                    90      P1      EXIF                        93
                    94                                          97
                    98      SCON0   SBUF0                       9B
                    9C                                          9F
                    A0      P2                                  A3
                    A4                                          A7
                    A8      IE      SADDR0                      AB
                    AC                                          AF
                    B0      P3                                  B3
                    B4                                          B7
                    B8      IP      SADEN0                      BB
                    BC                                          BF
                    C0      SCON1   SBUF1                       C3
                    C4              STATUS          TA          C7
                    C8      T2CON   T2MOD   RCAP2L  RCAP2H      CB
                    CC      TL2     TH2                         CF
                    D0      PSW                                 D3
                    D4                                          D7
                    D8      WDCON                               DB
                    DC                                          DF
                    E0      ACC                                 E3
                    E4                                          E7
                    E8      EIE                                 EB
                    EC                                          EF
                    F0      B                                   F3
                    F4                                          F7
                    F8      EIP                                 FB
                    FC                                          FF

                    Alternates:

                    98      SCON    SBUF                        9B

            AS8XCXXX ASSEMBLER                                    PAGE AT-18
            DS80C320/DS80C323 SPECIAL FUNCTION REGISTERS

            AT.7.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            P1      90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON0   98      SCON0.0 SCON0.1 SCON0.2 SCON0.3     9B
                    9C      SCON0.4 SCON0.5 SCON0.6 SCON0.7     9F
            P2      A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            P3      B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
            SCON1   C0      SCON1.0 SCON1.1 SCON1.2 SCON1.3     C3
                    C4      SCON1.4 SCON1.5 SCON1.6 SCON1.7     C7
            T2CON   C8      T2CON.0 T2CON.1 T2CON.2 T2CON.3     CB
                    CC      T2CON.4 T2CON.5 T2CON.6 T2CON.7     CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
            WDCON   D8      WDCON.0 WDCON.1 WDCON.2 WDCON.3     DB
                    DC      WDCON.4 WDCON.5 WDCON.6 WDCON.7     DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
            EIE     E8      EIE.0   EIE.1   EIE.2   EIE.3       EB
                    EC      EIE.4   EIE.5   EIE.6   EIE.7       EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
            EIP     F8      EIP.0   EIP.1   EIP.2   EIP.3       FB
                    FC      EIP.4   EIP.5   EIP.6   EIP.7       FF

                            Alternates:

            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F

            AS8XCXXX ASSEMBLER                                    PAGE AT-19
            DS80C320/DS80C323 SPECIAL FUNCTION REGISTERS

            AT.7.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
                    90                                          93
                    94                                          97
            SCON0   98      RI_0    TI_0    RB8_0   TB8_0       9B
                    9C      REN_0   SM2_0   SM1_0   SMO_0       9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2             EA          AF
                    B0                                          B3
                    B4                                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PT2                         BF
            SCON1   C0      RI_1    TI_1    RB8_1   TB8_1       C3
                    C4      REN_1   SM2_1   SM1_1   SMO_1       C7
            T2CON   C8      CPRL2   CT2     TR2     EXEN2       CB
                    CC      TCLK    RCLK    EXF2    TF2         CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
            WDCON   D8      RWT     EWT     WTRF    WDIF        DB
                    DC      PFI     EPFI    POR     SMOD_1      DF
                    E0                                          E3
                    E4                                          E7
            EIE     E8      EX2     EX3     EX4     EX5         EB
                    EC      EWDI                                EF
                    F0                                          F3
                    F4                                          F7
            EIP     F8      PX2     PX3     PX4     PX5         FB
                    FC      PWDI                                FF

                    Alternates:

            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
            SCON    98                                          9B
                    9C                              FE          9F
            SCON0   98                                          9B
                    9C                              FE_0        9F
            SCON1   C0                                          C3
                    C4                              FE_1        C7
            T2CON   C8      CP_RL2  C_T2                        CB
                    CC                                          CF

            AS8XCXXX ASSEMBLER                                    PAGE AT-20
            DS80C320/DS80C323 SPECIAL FUNCTION REGISTERS

            AT.7.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            DPS     0x80                                        0x10
                    0x08                            SEL         0x01
            PCON    0x80    SMOD_0  SMOD0                       0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            CKCON   0x80    WD1     WD0     T2M     T1M         0x10
                    0x08    T0M     MD2     MD1     MD0         0x01
            EXIF    0x80    IE5     IE4     IE3     IE2         0x10
                    0x08            RGMD    RGSL    BGS         0x01
            STATUS  0x80    PIP     HIP     LIP                 0x10
                    0x08                                        0x01
            T2MOD   0x80                                        0x10
                    0x08                    T2OE    DCEN        0x01

                    Alternates:

            PCON    0x80    SMOD                                0x10
                    0x08                                        0x01

            AS8XCXXX ASSEMBLER                                    PAGE AT-21
            DS80C320/DS80C323 SPECIAL FUNCTION REGISTERS

            AT.8  DS80C390 SPECIAL FUNCTION REGISTERS

               The  DS80C390  Special  Function Registers are selected using
            the .DS80C390 assembler directive.

            AT.8.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80      P4      SP      DPL     DPH         83
                    84      DPL1    DPH1    DPS     PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1     CKCON               8F
                    90      P1      EXIF    P4CNT   DPX         93
                    94              DPX1    C0RMS0  C0RMS1      97
                    98      SCON0   SBUF0           ESP         9B
                    9C      AP      ACON    C0TMA0  C0TMA1      9F
                    A0      P2      P5      P5CNT   C0C         A3
                    A4      C0S     C0IR    C0TE    C0RE        A7
                    A8      IE      SADDR0  SADDR1  C0M1C       AB
                    AC      C0M2C   C0M3C   C0M4C   C0M5C       AF
                    B0      P3                      C0M6C       B3
                    B4      C0M7C   C0M8C   C0M9C   C0M10C      B7
                    B8      IP      SADEN0  SADEN1  C0M11C      BB
                    BC      C0M12C  C0M13C  C0M14C  C0M15C      BF
                    C0      SCON1   SBUF1                       C3
                    C4      PMR     STATUS  MCON    TA          C7
                    C8      T2CON   T2MOD   RCAP2L  RCAP2H      CB
                    CC      TL2     TH2     COR                 CF
                    D0      PSW     MCNT0   MCNT1   MA          D3
                    D4      MB      MC      C1RMS0  C1RMS1      D7
                    D8      WDCON                               DB
                    DC                      C1TMA0  C1TMA1      DF
                    E0      ACC                     C1C         E3
                    E4      C1S     C1IR    C1TE    C1RE        E7
                    E8      EIE             MXAX    C1M1C       EB
                    EC      C1M2C   C1M3C   C1M4C   C1M5C       EF
                    F0      B                       C1M6C       F3
                    F4      C1M7C   C1M8C   C1M9C   C1M10C      F7
                    F8      EIP                     C1M11C      FB
                    FC      C1M12C  C1M13C  C1M14C  C1M15C      FF

                    Alternates:

                    98      SCON    SBUF                        9B

            AS8XCXXX ASSEMBLER                                    PAGE AT-22
            DS80C390 SPECIAL FUNCTION REGISTERS

            AT.8.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
            P4      80      P4.0    P4.1    P4.2    P4.3        83
                    84      P4.4    P4.5    P4.6    P4.7        87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            P1      90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON0   98      SCON0.0 SCON0.1 SCON0.2 SCON0.3     9B
                    9C      SCON0.4 SCON0.5 SCON0.6 SCON0.7     9F
            P2      A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            P3      B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
            SCON1   C0      SCON1.0 SCON1.1 SCON1.2 SCON1.3     C3
                    C4      SCON1.4 SCON1.5 SCON1.6 SCON1.7     C7
            T2CON   C8      T2CON.0 T2CON.1 T2CON.2 T2CON.3     CB
                    CC      T2CON.4 T2CON.5 T2CON.6 T2CON.7     CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
            WDCON   D8      WDCON.0 WDCON.1 WDCON.2 WDCON.3     DB
                    DC      WDCON.4 WDCON.5 WDCON.6 WDCON.7     DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
            EIE     E8      EIE.0   EIE.1   EIE.2   EIE.3       EB
                    EC      EIE.4   EIE.5   EIE.6   EIE.7       EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
            EIP     F8      EIP.0   EIP.1   EIP.2   EIP.3       FB
                    FC      EIP.4   EIP.5   EIP.6   EIP.7       FF

                            Alternates:

            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F

            AS8XCXXX ASSEMBLER                                    PAGE AT-23
            DS80C390 SPECIAL FUNCTION REGISTERS

            AT.8.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
            P1      90      T2      T2EX    RXD1    TXD1        93
                    94      INT2    INT3    INT4    INT5        97
            SCON0   98      RI_0    TI_0    RB8_0   TB8_0       9B
                    9C      REN_0   SM2_0   SM1_0   SMO_0       9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2     ES1     EA          AF
            P3      B0      RXD0    TXD0    INT0    INT1        B3
                    B4      T0      T1                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PT2     PS1                 BF
            SCON1   C0      RI_1    TI_1    RB8_1   TB8_1       C3
                    C4      REN_1   SM2_1   SM1_1   SMO_1       C7
            T2CON   C8      CPRL2   CT2     TR2     EXEN2       CB
                    CC      TCLK    RCLK    EXF2    TF2         CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
            WDCON   D8      RWT     EWT     WTRF    WDIF        DB
                    DC      PFI     EPFI    POR     SMOD_1      DF
                    E0                                          E3
                    E4                                          E7
            EIE     E8      EX2     EX3     EX4     EX5         EB
                    EC      EWDI    C1IE    C0IE    CANBIE      EF
                    F0                                          F3
                    F4                                          F7
            EIP     F8      PX2     PX3     PX4     PX5         FB
                    FC      PWDI    C1IP    C0IP    CANBIP      FF

                    Alternates:

            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
            SCON    98                                          9B
                    9C                              FE          9F
            SCON0   98                                          9B
                    9C                              FE_0        9F
            SCON1   C0                                          C3
                    C4                              FE_1        C7
            T2CON   C8      CP_RL2  C_T2                        CB
                    CC                                          CF

            AS8XCXXX ASSEMBLER                                    PAGE AT-24
            DS80C390 SPECIAL FUNCTION REGISTERS

            AT.8.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            DPS     0x80    ID1     ID0     TSL                 0x10
                    0x08                            SEL         0x01
            PCON    0x80    SMOD_0  SMOD0   OFDF    OFDE        0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            CKCON   0x80    WD1     WD0     T2M     T1M         0x10
                    0x08    T0M     MD2     MD1     MD0         0x01
            EXIF    0x80    IE5     IE4     IE3     IE2         0x10
                    0x08    CKRY    RGMD    RGSL    BGS         0x01
            P4CNT   0x80            SBCAN                       0x10
                    0x08                                        0x01
            ESP     0x80                                        0x10
                    0x08                    ESP.1   ESP.0       0x01
            ACON    0x80                                        0x10
                    0x08            SA      AM1     AM0         0x01
            P5      0x80    P5.7    P5.6    P5.5    P5.4        0x10
                    0x08    P5.3    P5.2    P5.1    P5.0        0x01
            P5CNT   0x80    CAN1BA  CAN0BA  SP1EC   C1_IO       0x10
                    0x08    C0_IO   P5CNT.2 P5CNT.1 P5CNT.0     0x01
            CxC     0x80    ERIE    STIE    PDE     SIESTA      0x10
                    0x08    CRST    AUTOB   ERCS    SWINT       0x01
            CxS     0x80    BSS   EC96_128  WKS     RXS         0x10
                    0x08    TXS     ER2     ER1     ER0         0x01
            CxIR    0x80    INTIN7  INTIN6  INTIN5  INTIN4      0x10
                    0x08    INTIN3  INTIN2  INTIN1  INTIN0      0x01
            CxCxxC  0x80    MSRDY   ET1     ER1     INTRQ       0x10
                    0x08    EXTRQ   MTRQ    ROW_TIH DTUP        0x01
            PMR     0x80    CD1     CD0     SWB     CTM         0x10
                    0x08    4X_2X   ALEOFF                      0x01
            STATUS  0x80    PIP     HIP     LIP                 0x10
                    0x08    SPTA1   SPRA1   SPTA0   SPRA0       0x01
            MCON    0x80    IDM1    IDM0    CMA                 0x10
                    0x08    PDCE3   PDCE2   PDCE1   PDCE0       0x01
            T2MOD   0x80                            D13T1       0x10
                    0x08    D13T2           T2OE    DCEN        0x01
            COR     0x80    IRDACK  C1BPR7  C1BPR6  C0BPR7      0x10
                    0x08    C0BPR6  COD1    COD0    CLKOE       0x01
            MCNT0   0x80    _LSHIFT CSE     SCB     MAS4        0x10
                    0x08    MAS3    MAS2    MAS1    MAS0        0x01
            MCNT1   0x80    MST     MOF             CLM         0x10
                    0x08                                        0x01

                    Alternates:

            AS8XCXXX ASSEMBLER                                    PAGE AT-25
            DS80C390 SPECIAL FUNCTION REGISTERS

            PCON    0x80    SMOD                                0x10
                    0x08                                        0x01

            AS8XCXXX ASSEMBLER                                    PAGE AT-26
            DS80C390 SPECIAL FUNCTION REGISTERS

            AT.9  DS83C520/DS87C520 SPECIAL FUNCTION REGISTERS

               The DS83C520/DS87C520 Special Function Registers are selected
            using the .DS83C520 or DS87C520 assembler directives.

            AT.9.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80      P0      SP      DPL     DPH         83
                    84      DPL1    DPH1    DPS     PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1     CKCON               8F
                    90      PORT1   EXIF                        93
                    94                                          97
                    98      SCON0   SBUF0                       9B
                    9C                                          9F
                    A0      P2                                  A3
                    A4                                          A7
                    A8      IE      SADDR0  SADDR1              AB
                    AC                                          AF
                    B0      P3                                  B3
                    B4                                          B7
                    B8      IP      SADEN0  SADEN1              BB
                    BC                                          BF
                    C0      SCON1   SBUF1   ROMSIZE             C3
                    C4      PMR     STATUS          TA          C7
                    C8      T2CON   T2MOD   RCAP2L  RCAP2H      CB
                    CC      TL2     TH2                         CF
                    D0      PSW                                 D3
                    D4                                          D7
                    D8      WDCON                               DB
                    DC                                          DF
                    E0      ACC                                 E3
                    E4                                          E7
                    E8      EIE                                 EB
                    EC                                          EF
                    F0      B                                   F3
                    F4                                          F7
                    F8      EIP                                 FB
                    FC                                          FF

                    Alternates:

                    98      SCON    SBUF                        9B

            AS8XCXXX ASSEMBLER                                    PAGE AT-27
            DS83C520/DS87C520 SPECIAL FUNCTION REGISTERS

            AT.9.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
            P0      80      P0.7    P0.6    P0.5    P0.4        83
                    84      P0.3    P0.2    P0.1    P0.0        87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            PORT1   90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON0   98      SCON0.0 SCON0.1 SCON0.2 SCON0.3     9B
                    9C      SCON0.4 SCON0.5 SCON0.6 SCON0.7     9F
            P2      A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            P3      B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
            SCON1   C0      SCON1.0 SCON1.1 SCON1.2 SCON1.3     C3
                    C4      SCON1.4 SCON1.5 SCON1.6 SCON1.7     C7
            T2CON   C8      T2CON.0 T2CON.1 T2CON.2 T2CON.3     CB
                    CC      T2CON.4 T2CON.5 T2CON.6 T2CON.7     CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
            WDCON   D8      WDCON.0 WDCON.1 WDCON.2 WDCON.3     DB
                    DC      WDCON.4 WDCON.5 WDCON.6 WDCON.7     DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
            EIE     E8      EIE.0   EIE.1   EIE.2   EIE.3       EB
                    EC      EIE.4   EIE.5   EIE.6   EIE.7       EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
            EIP     F8      EIP.0   EIP.1   EIP.2   EIP.3       FB
                    FC      EIP.4   EIP.5   EIP.6   EIP.7       FF

                            Alternates:

            PORT1   90      PORT1.0 PORT1.1 PORT1.2 PORT1.3     93
                    94      PORT1.4 PORT1.5 PORT1.6 PORT1.7     97
            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F

            AS8XCXXX ASSEMBLER                                    PAGE AT-28
            DS83C520/DS87C520 SPECIAL FUNCTION REGISTERS

            AT.9.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
                    90                                          93
                    94                                          97
            SCON0   98      RI_0    TI_0    RB8_0   TB8_0       9B
                    9C      REN_0   SM2_0   SM1_0   SMO_0       9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2     ES1     EA          AF
                    B0                                          B3
                    B4                                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PT2     PS1                 BF
            SCON1   C0      RI_1    TI_1    RB8_1   TB8_1       C3
                    C4      REN_1   SM2_1   SM1_1   SMO_1       C7
            T2CON   C8      CPRL2   CT2     TR2     EXEN2       CB
                    CC      TCLK    RCLK    EXF2    TF2         CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
            WDCON   D8      RWT     EWT     WTRF    WDIF        DB
                    DC      PFI     EPFI    POR     SMOD_1      DF
                    E0                                          E3
                    E4                                          E7
            EIE     E8      EX2     EX3     EX4     EX5         EB
                    EC      EWDI                                EF
                    F0                                          F3
                    F4                                          F7
            EIP     F8      PX2     PX3     PX4     PX5         FB
                    FC      PWDI                                FF

                    Alternates:

            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
            SCON    98                                          9B
                    9C                              FE          9F
            SCON0   98                                          9B
                    9C                              FE_0        9F
            SCON1   C0                                          C3
                    C4                              FE_1        C7
            T2CON   C8      CP_RL2  C_T2                        CB
                    CC                                          CF

            AS8XCXXX ASSEMBLER                                    PAGE AT-29
            DS83C520/DS87C520 SPECIAL FUNCTION REGISTERS

            AT.9.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            DPS     0x80                                        0x10
                    0x08                            SEL         0x01
            PCON    0x80    SMOD_0  SMOD0                       0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            CKCON   0x80    WD1     WD0     T2M     T1M         0x10
                    0x08    T0M     MD2     MD1     MD0         0x01
            EXIF    0x80    IE5     IE4     IE3     IE          0x10
                    0x08    XT_RG   RGMD    RGSL    BGS         0x01
            SBUF1   0x80    SB7     SB6     SB5     SB4         0x10
                    0x08    SB3     SB2     SB1     SB0         0x01
            ROMSIZE 0x80                                        0x10
                    0x08            RMS2    RMS1    RMS0        0x01
            PMR     0x80    CD1     CD0     SWB                 0x10
                    0x08    XTOFF   ALEOFF  DME1    DME0        0x01
            STATUS  0x80    PIP     HIP     LIP     XTUP        0x10
                    0x08    SPTA1   SPRA1   SPTA0   SPRA0       0x01
            T2MOD   0x80                                        0x10
                    0x08                    T2OE    DCEN        0x01

                    Alternates:

            PCON    0x80    SMOD                                0x10
                    0x08                                        0x01

            AS8XCXXX ASSEMBLER                                    PAGE AT-30
            DS83C520/DS87C520 SPECIAL FUNCTION REGISTERS

            AT.10  DS83C530/DS87C530 SPECIAL FUNCTION REGISTERS

               The DS83C530/DS87C530 Special Function Registers are selected
            using the .DS83C530 or DS87C530 assembler directives.

            AT.10.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80      P0      SP      DPL     DPH         83
                    84      DPL1    DPH1    DPS     PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1     CKCON               8F
                    90      P1      EXIF                        93
                    94                      TRIM                97
                    98      SCON0   SBUF0                       9B
                    9C                                          9F
                    A0      P2                                  A3
                    A4                                          A7
                    A8      IE      SADDR0  SADDR1              AB
                    AC                                          AF
                    B0      P3                                  B3
                    B4                                          B7
                    B8      IP      SADEN0  SADEN1              BB
                    BC                                          BF
                    C0      SCON1   SBUF1   ROMSIZE             C3
                    C4      PMR     STATUS          TA          C7
                    C8      T2CON   T2MOD   RCAP2L  RCAP2H      CB
                    CC      TL2     TH2                         CF
                    D0      PSW                                 D3
                    D4                                          D7
                    D8      WDCON                               DB
                    DC                                          DF
                    E0      ACC                                 E3
                    E4                                          E7
                    E8      EIE                                 EB
                    EC                                          EF
                    F0      B               RTASS   RTAS        F3
                    F4      RTAM    RTAH                        F7
                    F8      EIP     RTCC    RTCSS   RTCS        FB
                    FC      RTCM    RTCH    RTCD0   RTCD1       FF

                    Alternates:

                    98      SCON    SBUF                        9B

            AS8XCXXX ASSEMBLER                                    PAGE AT-31
            DS83C530/DS87C530 SPECIAL FUNCTION REGISTERS

            AT.10.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
            P0      80      P0.7    P0.6    P0.5    P0.4        83
                    84      P0.3    P0.2    P0.1    P0.0        87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            P1      90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON0   98      SCON0.0 SCON0.1 SCON0.2 SCON0.3     9B
                    9C      SCON0.4 SCON0.5 SCON0.6 SCON0.7     9F
            P2      A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            P3      B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
            SCON1   C0      SCON1.0 SCON1.1 SCON1.2 SCON1.3     C3
                    C4      SCON1.4 SCON1.5 SCON1.6 SCON1.7     C7
            T2CON   C8      T2CON.0 T2CON.1 T2CON.2 T2CON.3     CB
                    CC      T2CON.4 T2CON.5 T2CON.6 T2CON.7     CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
            WDCON   D8      WDCON.0 WDCON.1 WDCON.2 WDCON.3     DB
                    DC      WDCON.4 WDCON.5 WDCON.6 WDCON.7     DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
            EIE     E8      EIE.0   EIE.1   EIE.2   EIE.3       EB
                    EC      EIE.4   EIE.5   EIE.6   EIE.7       EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
            EIP     F8      EIP.0   EIP.1   EIP.2   EIP.3       FB
                    FC      EIP.4   EIP.5   EIP.6   EIP.7       FF

                            Alternates:

            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F

            AS8XCXXX ASSEMBLER                                    PAGE AT-32
            DS83C530/DS87C530 SPECIAL FUNCTION REGISTERS

            AT.10.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
                    90                                          93
                    94                                          97
            SCON0   98      RI_0    TI_0    RB8_0   TB8_0       9B
                    9C      REN_0   SM2_0   SM1_0   SMO_0       9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2     ES1     EA          AF
                    B0                                          B3
                    B4                                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PT2     PS1                 BF
            SCON1   C0      RI_1    TI_1    RB8_1   TB8_1       C3
                    C4      REN_1   SM2_1   SM1_1   SMO_1       C7
            T2CON   C8      CPRL2   CT2     TR2     EXEN2       CB
                    CC      TCLK    RCLK    EXF2    TF2         CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
            WDCON   D8      RWT     EWT     WTRF    WDIF        DB
                    DC      PFI     EPFI    POR     SMOD_1      DF
                    E0                                          E3
                    E4                                          E7
            EIE     E8      EX2     EX3     EX4     EX5         EB
                    EC      EWDI    ERTCI                       EF
                    F0                                          F3
                    F4                                          F7
            EIP     F8      PX2     PX3     PX4     PX5         FB
                    FC      PWDI    PRTCI                       FF

                    Alternates:

            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
            SCON    98                                          9B
                    9C                              FE          9F
            SCON0   98                                          9B
                    9C                              FE_0        9F
            SCON1   C0                                          C3
                    C4                              FE_1        C7
            T2CON   C8      CP_RL2  C_T2                        CB
                    CC                                          CF

            AS8XCXXX ASSEMBLER                                    PAGE AT-33
            DS83C530/DS87C530 SPECIAL FUNCTION REGISTERS

            AT.10.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            DPS     0x80                                        0x10
                    0x08                            SEL         0x01
            PCON    0x80    SMOD_0  SMOD0                       0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            CKCON   0x80    WD1     WD0     T2M     T1M         0x10
                    0x08    T0M     MD2     MD1     MD0         0x01
            EXIF    0x80    IE5     IE4     IE3     IE          0x10
                    0x08    XT_RG   RGMD    RGSL    BGS         0x01
            TRIM    0x80    E4K     X12_6   TRM2    _TRM2       0x10
                    0x08    TRM1    _TRM1   TRM0    _TRM0       0x01
            SBUF1   0x80    SB7     SB6     SB5     SB4         0x10
                    0x08    SB3     SB2     SB1     SB0         0x01
            ROMSIZE 0x80                                        0x10
                    0x08            RMS2    RMS1    RMS0        0x01
            PMR     0x80    CD1     CD0     SWB                 0x10
                    0x08    XTOFF   ALEOFF  DME1    DME0        0x01
            STATUS  0x80    PIP     HIP     LIP     XTUP        0x10
                    0x08    SPTA1   SPRA1   SPTA0   SPRA0       0x01
            T2MOD   0x80                                        0x10
                    0x08                    T2OE    DCEN        0x01
            RTCC    0x80    SSCE    SCE     MCE     HCE         0x10
                    0x08    RTCRE   RTCWE   RTCIF   RTCE        0x01

                    Alternates:

            PCON    0x80    SMOD                                0x10
                    0x08                                        0x01

            AS8XCXXX ASSEMBLER                                    PAGE AT-34
            DS83C530/DS87C530 SPECIAL FUNCTION REGISTERS

            AT.11  DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

               The DS83C550/DS87C550 Special Function Registers are selected
            using the .DS83C550 or DS87C550 assembler directives.

            AT.11.1  SFR Map

                            --------- 4 Bytes ----------
                            ----    ----    ----    ----
                    80      PORT0   SP      DPL     DPH         83
                    84      DPL1    DPH1    DPS     PCON        87
                    88      TCON    TMOD    TL0     TL1         8B
                    8C      TH0     TH1     CKCON               8F
                    90      PORT1   RCON                        93
                    94                                          97
                    98      SCON0   SBUF0                       9B
                    9C                              PMR         9F
                    A0      PORT2   SADDR0  SADDR1              A3
                    A4                                          A7
                    A8      IE      CMPL0   CMPL1   CMPL2       AB
                    AC      CPTL0   CPTL1   CPTL2   CPTL3       AF
                    B0      PORT3           ADCON1  ADCON2      B3
                    B4      ADMSB   ADLSD   WINHI   WINLO       B7
                    B8      IP      SADEN0  SADEN1              BB
                    BC                      T2CON   T2MOD       BF
                    C0      PORT4           ROMSIZE             C3
                    C4      PORT5   STATUS          TA          C7
                    C8      T2IR    CMPH0   CMPH1   CMPH2       CB
                    CC      CPTH0   CPTH1   CPTH2   CPTH3       CF
                    D0      PSW             PW0FG   PW1FG       D3
                    D4      PW2FG   PW3FG   PWMADR              D7
                    D8      SCON1   SBUF1                       DB
                    DC      PWM0    PWM1    PWM2    PWM3        DF
                    E0      ACC     PW01CS  PW23CS  PW01CON     E3
                    E4      PW23CON         RLOADL  RLOADH      E7
                    E8      EIE             T2SEL   CTCON       EB
                    EC      TL2     TH2     SETR    RSTR        EF
                    F0      B       PORT6                       F3
                    F4                                          F7
                    F8      EIP                                 FB
                    FC                              WDCON       FF

                    Alternates:

                    80      P0                                  83
                    90      P1                                  93
                    98      SCON    SBUF                        9B
                    A0      P2                                  A3
                    B0      P3                                  B3
                    C0      P4                                  C3

            AS8XCXXX ASSEMBLER                                    PAGE AT-35
            DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

                    C4      P5                                  C7
                    F0              PORT6                       F3

            AS8XCXXX ASSEMBLER                                    PAGE AT-36
            DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

            AT.11.2  Bit Addressable Registers:  Generic

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
            PORT0   80      P0.7    P0.6    P0.5    P0.4        83
                    84      P0.3    P0.2    P0.1    P0.0        87
            TCON    88      TCON.0  TCON.1  TCON.2  TCON.3      8B
                    8C      TCON.4  TCON.5  TCON.6  TCON.7      8F
            PORT1   90      P1.0    P1.1    P1.2    P1.3        93
                    94      P1.4    P1.5    P1.6    P1.7        97
            SCON0   98      SCON0.0 SCON0.1 SCON0.2 SCON0.3     9B
                    9C      SCON0.4 SCON0.5 SCON0.6 SCON0.7     9F
            PORT2   A0      P2.0    P2.1    P2.2    P2.3        A3
                    A4      P2.4    P2.5    P2.6    P2.7        A7
            IE      A8      IE.0    IE.1    IE.2    IE.3        AB
                    AC      IE.4    IE.5    EI.6    IE.7        AF
            PORT3   B0      P3.0    P3.1    P3.2    P3.3        B3
                    B4      P3.4    P3.5    P3.6    P3.7        B7
            IP      B8      IP.0    IP.1    IP.2    IP.3        BB
                    BC      IP.4    IP.5    IP.6    IP.7        BF
            PORT4   C0      P4.0    P4.1    P4.2    P4.3        C3
                    C4      P4.4    P4.5    P4.6    P4.7        C7
            T2IR    C8      T2IR.0  T2IR.1  T2IR.2  T2IR.3      CB
                    CC      T2IR.4  T2IR.5  T2IR.6  T2IR.7      CF
            PSW     D0      PSW.0   PSW.1   PSW.2   PSW.3       D3
                    D4      PSW.4   PSW.5   PSW.6   PSW.7       D7
            SCON1   D8      SCON1.0 SCON1.1 SCON1.2 SCON1.3     DB
                    DC      SCON1.4 SCON1.5 SCON1.6 SCON1.7     DF
            ACC     E0      ACC.0   ACC.1   ACC.2   ACC.3       E3
                    E4      ACC.4   ACC.5   ACC.6   ACC.7       E7
            EIE     E8      EIE.0   EIE.1   EIE.2   EIE.3       EB
                    EC      EIE.4   EIE.5   EIE.6   EIE.7       EF
            B       F0      B.0     B.1     B.2     B.3         F3
                    F4      B.4     B.5     B.6     B.7         F7
            EIP     F8      EIP.0   EIP.1   EIP.2   EIP.3       FB
                    FC      EIP.4   EIP.5   EIP.6   EIP.7       FF

                            Alternates:

            PORT0   80      PORT0.7 PORT0.6 PORT0.5 PORT0.4     83
                    84      PORT0.3 PORT0.2 PORT0.1 PORT0.0     87
            PORT1   90      PORT1.0 PORT1.1 PORT1.2 PORT1.3     93
                    94      PORT1.4 PORT1.5 PORT1.6 PORT1.7     97
            SCON    98      SCON.0  SCON.1  SCON.2  SCON.3      9B
                    9C      SCON.4  SCON.5  SCON.6  SCON.7      9F
            PORT2   A0      PORT2.0 PORT2.1 PORT2.2 PORT2.3     A3
                    A4      PORT2.4 PORT2.5 PORT2.6 PORT2.7     A7
            PORT3   B0      PORT3.0 PORT3.1 PORT3.2 PORT3.3     B3
                    B4      PORT3.4 PORT3.5 PORT3.6 PORT3.7     B7
            PORT4   C0      PORT4.0 PORT4.1 PORT4.2 PORT4.3     C3
                    C4      PORT4.4 PORT4.5 PORT4.6 PORT4.7     C7

            AS8XCXXX ASSEMBLER                                    PAGE AT-37
            DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

            AT.11.3  Bit Addressable Registers:  Specific

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                    80                                          83
                    84                                          87
            TCON    88      IT0     IE0     IT1     IE1         8B
                    8C      TR0     TF0     TR1     TF1         8F
                    90                                          93
                    94                                          97
            SCON0   98      RI_0    TI_0    RB8_0   TB8_0       9B
                    9C      REN_0   SM2_0   SM1_0   SMO_0       9F
                    A0                                          A3
                    A4                                          A7
            IE      A8      EX0     ET0     EX1     ET1         AB
                    AC      ES0     ET2     ES1     EA          AF
                    B0                                          B3
                    B4                                          B7
            IP      B8      PX0     PT0     PX1     PT1         BB
                    BC      PS0     PS1     PAD                 BF
            PORT4   C0      CMSR0   CMSR1   CMSR2   CMSR3       C3
                    C4      CMSR4   CMSR5   CMT0    CMT1        C7
            T2IR    C8      CF0     CF1     CF2     CF3         CB
                    CC      CM0F    CM1F    CM2F                CF
            PSW     D0      P       FL      OV      RS0         D3
                    D4      RS1     F0      AC      CY          D7
            SCON1   D8      RI_1    TI_1    RB8_1   TB8_1       DB
                    DC      REN_1   SM2_1   SM1_1   SMO_1       DF
                    E0                                          E3
                    E4                                          E7
            EIE     E8      EX2     EX3     EX4     EX5         EB
                    EC      ECM0    ECM1    ECM2    ET2         EF
                    F0                                          F3
                    F4                                          F7
            EIP     F8      PX2     PX3     PX4     PX5         FB
                    FC      PCM0    PCM1    PCM2    PT2         FF

                    Alternates:

            SCON    98      RI      TI      RB8     TB8         9B
                    9C      REN     SM2     SM1     SMO         9F
            SCON    98                                          9B
                    9C                              FE          9F
            SCON0   98                                          9B
                    9C                              FE_0        9F
            T2IR    C8      IE2     IE3     IE4     IE5         CB
                    CC                                          CF
            SCON1   D8                                          DB
                    DC                              FE_1        DF
            EIE     E8      EC0     EC1     EC2     EC3         EB
                    EC                                          EF
            EIP     F8      PC0     PC1     PC2     PC3         FB

            AS8XCXXX ASSEMBLER                                    PAGE AT-38
            DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

                    FC                                          FF

            AS8XCXXX ASSEMBLER                                    PAGE AT-39
            DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

            AT.11.4  Optional Symbols:  Control Bits

                            ---------- 4 BITS ----------
                            ----    ----    ----    ----
                            0x80    0x40    0x20    0x10
                            0x08    0x04    0x02    0x10
                            ----    ----    ----    ----
            DPS     0x80    ID1     ID0     TSL                 0x10
                    0x08                            SEL         0x01
            PCON    0x80    SMOD_0  SMOD0                       0x10
                    0x08    GF1     GF0     STOP    IDLE        0x01
            TMOD    0x80    T1GATE  T1C_T   T1M1    T1M0        0x10
                    0x08    T0GATE  T0C_T   T0M1    T0M0        0x01
            CKCON   0x80    WD1     WD0     T2M     T1M         0x10
                    0x08    T0M     MD2     MD1     MD0         0x01
            RCON    0x80                                        0x10
                    0x08    CKRDY   RGMD    RGSL    BGS         0x01
            PMR     0x80    CD1     CD0     SWB     CTM         0x10
                    0x08    4X_2X   ALEOFF  DEM1    DEM0        0x01
            ADCON1  0x80   STRT_BSY EOC     CONT_SS ADEX        0x10
                    0x08    WCQ     WCM     ADON    WCIO        0x01
            ADCON2  0x80    OUTCF   MUX2    MUX1    MUX0        0x10
                    0x08    APS3    APS2    APS1    APS0        0x01
            T2CON   0x80    TF2     EXF2    RCLK    TCLK        0x10
                    0x08    EXEN2   TR2     CT2     CPRL2       0x01
            T2MOD   0x80                                        0x10
                    0x08                    T2OE    DCEN        0x01
            PORT5   0x80    ADC7    ADC6    ADC5    ADC4        0x10
                    0x08    ADC3    ADC2    ADC1    ADC0        0x01
            ROMSIZE 0x80                                        0x10
                    0x08            RMS2    RMS1    RMS0        0x01
            STATUS  0x80    PIP     HIP     LIP     XTUP        0x10
                    0x08    SPTA1   SPRA1   SPTA0   SPRA0       0x01
            PWMADR  0x80    ADRS                                0x10
                    0x08                    PWE1    PWE0        0x01
            PW01CS  0x80    PW0S2   PW0S1   PW0S0   PW0EN       0x10
                    0x08    PW1S2   PW1S1   PW1S0   PW1EN       0x01
            PW23CS  0x80    PW2S2   PW2S1   PW2S0   PW2EN       0x10
                    0x08    PW3S2   PW3S1   PW3S0   PW3EN       0x01
            PW01CON 0x80    PW0F    PW0DC   PW0OE   PW0T_C      0x10
                    0x08    PW1F    PW1DC   PW1OE   PW1T_C      0x01
            PW23CON 0x80    PW2F    PW2DC   PW2OE   PW2T_C      0x10
                    0x08    PW3F    PW3DC   PW3OE   PW3T_C      0x01
            T2SEL   0x80    TF2S    TF2BS           TF2B        0x10
                    0x08                    T2P1    T2P0        0x01
            CTCON   0x80    _CT3    CT3     _CT2    CT2         0x10
                    0x08    _CT1    CT1     _CT0    CT0         0x01
            SETR    0x80    TGFF1   TGFF0   CMS5    CMS4       0x10
                    0x08    CMS3    CMS2    CMS1    CMS0        0x01
            RSTR    0x80    CMTE1   CMTE0   CMR5    CMR4        0x10
                    0x08    CMR3    CMR2    CMR1    CMR0        0x01
            PORT6   0x80    STADC           PWMC1   PWMC0       0x10

            AS8XCXXX ASSEMBLER                                    PAGE AT-40
            DS83C550/DS87C550 SPECIAL FUNCTION REGISTERS

                    0x08    PWMO3   PWMO2   PWMO1   PWMO0       0x01
            WDCON   0x80    SMOD_1  POR     EPF1    PF1         0x10
                    0x08    WDIF    WTRF    EWT     RWT         0x01

                    Alternates:

            PCON    0x80    SMOD                                0x10
                    0x08                                        0x01
            T2CON   0x80                                        0x10
                    0x08                    C_T2    _RL2        0x01

                                       APPENDIX AU

                                     ASAVR ASSEMBLER

            AU.1  AVR ASSEMBLER NOTES

            The  AVR  series  of  processors  uses  a non unified addressing
            scheme:  the instruction addressing is 1 per  instruction  word,
            each  instruction uses 2 bytes of memory.  The processor data is
            addressed as 1 per byte of data.  To properly address  the  pro-
            gram/data spaces you, the programmer, must seperate your program
            and data into seperate code and data areas.  The  data  area  is
            addressed  as 1 per byte and the code area is addressed as 1 per
            word.

               The  assembler/linker  processes the instruction code so that
            the linker will output 2 bytes for each instruction  word.   The
            instruction  word  address  will  be  the  file  encoded address
            divided by 2.

               The  default  address  space  is assumed to be 64K (16-bits).
            The larger address space (ATmega...) processors must specify the
            32-Bit  addressing assembler directive '.32bit' in order to pro-
            cess the JMP instruction.

            AU.1.1  Processor Specific Directives

               The  normal PC relative addressing is -2047 to +2048 relative
            to the current PC.  For a processor with less than 4K  words  of
            program space the AVR relative jump/call can access any location
            due to address wrap around.

               The  ASAVR cross assembler has one (1) processor specific as-
            sembler directive which tells the assembler that the AVR has  4K
            words or less of program space.

                    .avr_4k   0     Normal PC Relative addressing
                    .avr_4k   1     AVR with <= 4K of Memory

            ASAVR ASSEMBLER                                        PAGE AU-2
            AVR ASSEMBLER NOTES

               The  remaining  processor specific directives specify the AVR
            processor type.

                    .AT90SXXXX
                    .AT90S1200
                    .AT90S2313
                    .AT90S2323
                    .AT90S2343
                    .AT90S2333
                    .AT90S4433
                    .AT90S4414
                    .AT90S4434
                    .AT90S8515
                    .AT90C8534
                    .AT90S8535
                    .ATmega103
                    .ATmega603
                    .ATmega161
                    .ATmega163
                    .ATtiny10
                    .ATtiny11
                    .ATtiny12
                    .ATtiny15
                    .ATtiny22
                    .ATtiny28

               A  file, avr.sfr, contains definitions for the Spepcial Func-
            tion Registers for all the defined processors.  Edit the file to
            make  your  selection of processor and then .include the file at
            the beginning of your assembler file.

            AU.1.2  The .__.CPU.  Variable

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values  for  the  ASAVR
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                     Undefined                       0
                     AT90SXXXX (User Defined)        1
                     AT90S1200                       2
                     AT90S2313                       3
                     AT90S2323                       4
                     AT90S2343                       5
                     AT90S2333                       6
                     AT90S4433                       7
                     AT90S4414                       8

            ASAVR ASSEMBLER                                        PAGE AU-3
            AVR ASSEMBLER NOTES

                     AT90S4434                       9
                     AT90S8515                      10
                     AT90C8534                      11
                     AT90S8535                      12
                     ATmega103                      13
                     ATmega603                      14
                     ATmega161                      15
                     ATmega163                      16
                     ATtiny10                       17
                     ATtiny11                       18
                     ATtiny12                       19
                     ATtiny15                       20
                     ATtiny22                       21
                     ATtiny28                       22

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AU.2  AVR REGISTER SET

            The following is a list of the AVR registers used by ASAVR:

                    r0-r31  -       8-bit registers
                    x       -       index register (x = r27:r26)
                    y       -       index register (y = r29:r28)
                    z       -       index register (z = r31:r30)

            AU.3  AVR INSTRUCTION SET

               The following tables list all AVR mnemonics recognized by the
            ASAVR assembler.  The designation [] refers to  a  required  ad-
            dressing mode argument.  The following list specifies the format
            for each addressing mode supported by ASAVR:

                    #data           immediate data

                    expr            expression

            ASAVR ASSEMBLER                                        PAGE AU-4
            AVR INSTRUCTION SET

                    Rd              destination register (0-31)

                    Rd,Rs           destination register (0-31)
                                    source register (0-31)

                    Rd,#data        destination register (0-31)
                                    immediate data

                    addr            address

                    addr,Rs         destination address
                                    source register

                    Rd,addr         destination register
                                    source address

                    Rs,b            source register
                                    bit position

                    Rd,b            destination register
                                    bit position

                    A               an I/O register (0-31)

                    A,b             an I/O register (0-31)
                                    bit position

                    A,Rs            source register to
                                    output register

                    Rd,A            input register to
                                    destination register

                    Rd,X            load indirect
                    Rd,Y
                    Rd,Z

                    Rd,-X           load indirect pre-decrement
                    Rd,-Y
                    Rd,-Z

                    Rd,X+           load indirect post-increment
                    Rd,Y+
                    Rd,Z+

                    Rd,Z+Q          load indirect with displacement

                    X,Rs            store indirect
                    Y,Rs
                    Z,Rs

                    -X,Rs           store indirect pre-decrement

            ASAVR ASSEMBLER                                        PAGE AU-5
            AVR INSTRUCTION SET

                    -Y,Rs
                    -Z,Rs

                    X+,Rs           store indirect post increment
                    Y+,Rs
                    Z+,Rs

                    Z+Q,Rs          store indirect with displacement

                    label           branch label

            The  terms  data, expr, displacement, bit position, A, and label
            may be expressions.

               Note  that not all instructions are available with every pro-
            cessor type.  Not all addressing modes are valid with every  in-
            struction,   refer   to   the   AVR  technical  data  for  valid
            instructions and modes.

            AU.3.1  AVR Arithmetic and Logical Instructions

                    add     Rd,Rs           adc     Rd,Rs
                    adiw    Rd,#data        sub     Rd,Rs
                    subi    Rd,#data        sbc     Rd,Rs
                    sbci    Rd,#data        sbiw    Rd,#data
                    and     Rd,Rs           andi    Rd,#data
                    or      Rd,Rs           ori     Rd,#data
                    cp      Rd,Rs           eor     Rd,Rs
                    cpi     Rd,#data        cpc     Rd,Rs
                    cbr     Rd,#data        sbr     Rd,#data
                    clr     Rd              com     Rd
                    dec     Rd              inc     Rd
                    neg     Rd              ser     Rd
                    tst     Rd
                    mul     Rd,Rs           fmul    Rd,Rs
                    muls    Rd,Rs           fmuls   Rd,Rs
                    mulsu   Rd,Rs           fmulsu  Rd,Rs

            ASAVR ASSEMBLER                                        PAGE AU-6
            AVR INSTRUCTION SET

            AU.3.2  AVR Bit and Bit-Test Instructions

                    lsl     Rd              lsr     Rd
                    rol     Rd              ror     Rd
                    asr     Rd              swap    Rd
                    bset    b               bclr    b
                    sbi     A,b             cbi     A,b
                    bst     Rs,b            bld     Rd,b
                    sec                     sez
                    sen                     sev
                    ses                     seh
                    set                     sei
                    clc                     clz
                    cln                     clv
                    cls                     clh
                    clt                     cli
                    nop                     sleep
                    wdr

            AU.3.3  AVR Skip on Test Instructions

                    cpse    Rd,Rs
                    sbrc    Rs,b            sbrs    Rs,b
                    sbic    A,b             sbis    A,b

            AU.3.4  AVR Jump/Call/Return Instructions

                    jmp     addr            rjmp    addr
                    ijmp                    eijmp
                    call    addr            rcall   addr
                    icall                   eicall
                    ret                     reti

            AU.3.5  AVR Short Branch Instructions

                    brcc    label           brcs    label
                    breq    label           brge    label
                    brhc    label           brhs    label
                    brid    label           brie    label
                    brlo    label           brlt    label
                    brmi    label           brne    label
                    brpl    label           brsh    label
                    brtc    label           brts    label
                    brvc    label           brvs    label

            ASAVR ASSEMBLER                                        PAGE AU-7
            AVR INSTRUCTION SET

            AU.3.6  AVR Short Branch Instructions with Bit Test

                    brbc    b,label         brbs    b,label

            AU.3.7  AVR Data Transfer Instructions

                    mov     Rd,Rs           movw    Rd,Rs
                    ldi     Rd,#data
                    ld      []              st      []
                    ldd     []              std     []
                    lds     Rd,addr         sts     addr,Rs
                    lpm     []              elpm    []
                    spm
                    push    Rs              pop     Rd
                    in      Rd,A            out     A,Rs

                                       APPENDIX AV

                                    ASEZ80 ASSEMBLER

            AV.1  ACKNOWLEDGMENT

            Thanks  to Patrick Head for his contribution of the ASEZ80 cross
            assembler.

               Patrick Head

                    patrick at phead dot net

            AV.2  PROCESSOR SPECIFIC DIRECTIVES

               The  ASEZ80 assembler is a port of the ASZ80 assembler.  This
            assembler can process EZ80 code in Z80 and ADL modes in any com-
            bination  within  the  source  file.   The  following  processor
            specific assembler directives specify which mode  the  assembler
            is  to  process  the assembler source code.  The default mode of
            the assembler is Z80.

            AV.2.1  .z80 Directive

            Format:

                    .z80    (value)

            The  .z80  directive  without an argument selects the 16-bit Z80
            compatible mode of the EZ80 processor.  The .z80 directive  with
            the  optional argument may be used to select the Z80 16-Bit mode
            (value != 0) or the EZ80 24-bit  mode  (value == 0).   Mnemonics
            not allowed in the selected mode will generate m (mode) and/or a
            (addressing) errors.

            ASEZ80 ASSEMBLER                                       PAGE AV-2
            PROCESSOR SPECIFIC DIRECTIVES

            AV.2.2  .adl Directive

            Format:

                    .adl    (value)

            The  .adl  directive without an argument selects the 24-bit EZ80
            mode of the EZ80 processor.  The .adl  directive  with  the  op-
            tional  argument  may  be  used  to  select the EZ80 24-Bit mode
            (value != 0) or the Z80 16-bit mode (value == 0).  Mnemonics not
            allowed  in  the  selected  mode will generate m (mode) and/or a
            (addressing) errors.

            AV.2.3  .msb Directive

            Format:

                    .msb    n

               The  assembler operator '>' selects the upper byte (MSB) when
            included in an assembler instruction.  The normal assembler mode
            is  to select bits <15:8> as the MSB.  The .msb directive allows
            the programmer to specify a particular byte as  the  'MSB'  when
            the address space is larger than 16-bits.

               For a 24-bit EZ80 address the assembler directive .msb n con-
            figures the assembler to select a particular byte as MSB.  Given
            a  24-bit  address  of  Mmn (M is <23:16>, m is <15:8>, and n is
            <7:0>) the following examples show how to  select  a  particular
            address byte:

                    .msb 1          ;select byte 1 of address
            <M(2):m(1):n(0)>
                    LD A,>Mmn       ;byte m <15:8> ==>> A
                    ...

                    .msb 2          ;select byte 2 of address
            <M(2):m(1):n(0)>
                    LD A,>Mmn       ;byte M <23:16> ==>> A
                    LD MB,A         ;place in MBASE register

            ASEZ80 ASSEMBLER                                       PAGE AV-3
            PROCESSOR SPECIFIC DIRECTIVES

            AV.3  EZ80 ADDRESSING AND INSTRUCTIONS

            AV.3.1  Instruction Symbols

            b          Bit select
                            (000 = bit 0, 001 = bit 1,
                             010 = bit 2, 011 = bit 3,
                             100 = bit 4, 101 = bit 5,
                             110 = bit 6, 111 = bit 7)
            cc         condition code C, NC, Z, NZ, P, M, PE, PO
                       test of single bit in FLAGS register
            cc'        condition code C, NC, Z, NZ
                       test of single bit in FLAGS register
            d          an 8-bit two's complement displacement with
                       value from -128 to 127.
            I          Interrupt Page Address Register
            ir or ir'  8-bit CPU register IXH(IX:[15:8]),
                       IXL (IX:[7:0], IYH (IY:[15:8]), IYL (IY:[7:0])
            IX/Y       CPU register IX or IY
            (IX/Y+d)   A location in memory with address formed by the
                       sum of the contents of the Index Register, IX
                       or IY, and the two's complement displacement d.
            MB         Z80 Memory Mode Base Address Register
            Mmn        A 24-bit immediate data value
            (Mmn)      A 24-bit value indicating a location in
                       memory at this address.
            mn         A 16-bit immediate data value
            (mn)       A 16-bit value indicating a location in
                       memory at this address.
            n          8-bit immediate data value
            R          Refresh Counter Register
            r or r'    8-bit CPU register A, B, C, D, E, H, L
            rr         16 or 24-bit CPU register BC, DE, HL
            rxy        16 or 24-bit CPU register BC, DE, HL, IX, IY
            SP         Stack Pointer, Can indicate either the
                       StackPointer Short register (SPS) or the
                       StackPointer Long register (SPL).

            ASEZ80 ASSEMBLER                                       PAGE AV-4
            EZ80 ADDRESSING AND INSTRUCTIONS

                    C  -    carry bit set
                    NC -    carry bit clear
                    Z  -    zero bit set
                    NZ -    zero bit clear
                    M  -    sign bit set
                    P  -    sign bit clear
                    PE -    parity even
                    PO -    parity odd

            The terms b, d, Mmn, mn, n, and ss may all be expressions.

            ASEZ80 ASSEMBLER                                       PAGE AV-5
            EZ80 ADDRESSING AND INSTRUCTIONS

            AV.3.2  EZ80 Instructions

               The  following list of instructions (with explicit addressing
            modes) are available for the EZ80.

            ADC A,(HL)              DEC (HL)                INI
            ADC A,ir                DEC ir                  INI2
            ADC A,(IX/Y+d)          DEC IX/Y                INI2R
            ADC A,n                 DEC (IX/Y+d)
            ADC A,r                 DEC r                   INIM
            ADC HL,rr               DEC rr                  INIMR
            ADC HL,SP               DEC SP
                                                            INIR
            ADD A,(HL)              DI                      INIRX
            ADD A,ir
            ADD A,(IX/Y+d)          DJNZ d                  JP cc,Mmn
            ADD A,n                                         JP HL
            ADD A,r                 EI                      JP IX/Y
            ADD HL,rr                                       JP Mmn
            ADD HL,SP               EX AF,AF'
            ADD IX/Y,rxy            EX DE,HL                JR cc',d
            ADD IX/Y,SP             EX (SP),HL              JR d
                                    EX (SP),IX/Y
            AND A,HL                                        LD A,I
            AND A,ir                EXX                     LD A,(IX/Y+d)
            AND A,(IX/Y+d)                                  LD A,MB
            AND A,n                 HALT                    LD A,(Mmn)
            AND A,r                                         LD A,R
                                    IM n                    LD A,(rr)
            BIT b,(HL)              IM A,(n)                LD (HL),IX/Y
            BIT b, (IX/Y+d)         IN r,(BC)               LD (HL),n
            BIT b,r                                         LD (HL),r
                                    IN0 r,(n)               LD (HL),rr
            CALL cc,Mmn                                     LD IY,(SP+n)
            CALL mn                 INC (HL)                LD I,HL
                                    INC ir                  LD I,A
            CP A,(HL)               INC IX/Y                LD ir,ir'
            CP A,ir                 INC (IX/Y+d)            LD ir,n
            CP A,(IX/Y+d)           INC r                   LD ir,r
            CP A,r                  INC SP                  LD IX/Y,(HL)
                                                            LD IX/Y,(IX/Y+d)
            CPD                     IND                     LD IX/Y,Mmn
            CPDR                    IND2                    LD IX/Y,(Mmn)
                                    IND2R                   LD (IX/Y+d),IX/Y
            CPI                                             LD (IX/Y+d),n
            CPIR                    INDM                    LD (IX/Y+d),r
                                    INDMR                   LD (IX/Y+d),rr
            CPL                                             LD MB,A
                                    INDR                    LD (Mmn),A
            DAA                     INDRX                   LD (Mmn),IX/Y

            ASEZ80 ASSEMBLER                                       PAGE AV-6
            EZ80 ADDRESSING AND INSTRUCTIONS

            LD (Mmn),rr             OTDR                    RL r
            LD (Mmn),SP             OTDRX
            LD R,A                                          RLA
            LD r,(HL)               OTI2R
            LD r,ir                                         RLC (HL)
            LD r,(IX/Y+d)           OTIM                    RLC (IX/Y+d)
            LD r,n                  OTIMR                   RLC r
            LD r,r'
            LD rr,(HL)              OTIR                    RLCA
            LD rr,(IX/Y+d)          OTIRX
            LD rr,Mmn                                       RLD
            LD rr,(Mmn)             OUT (BC),r
            LD (rr),A               OUT (C),r               RR (HL)
            LD SP,HL                OUT (n),A               RR (IX/Y+d)
            LD SP,IX/Y                                      RR r
            LD SP,Mmn               OUTD
            LD SP,(Mmn)             OUTD2                   RRA

            LDD                     OUTI                    RRC (HL)
            LDDR                    OUTI2                   RRC (IX/Y+d)
                                    RL (IX+d)               RRC r
            LDI                     RL (IY+d
            LDIR                                            RRCA
                                    PEA IX+d
            LEA IX/Y,IX+d           PEA IY+d                RRD
            LEA IX/Y,IY+d
            LEA rr,IX+d             POP AF                  RSMIX
            LEA rr,IY+d             POP IX/Y
                                    POP rr                  RST n
            MLT rr
            MLT SP                  PUSH AF                 SBC A,(HL)
                                    PUSH IX/Y               SBC A,ir
            NEG                     PUSH rr                 SBC A,(IX/Y+d)
                                                            SBC A,n
            NOP                     RES b,(IX/Y+d)          SBC A,r
                                    RES b,r                 SBC HL,rr
            OR A,(HL)                                       SBC HL,SP
            OR A,ir                 RET
            OR A,(IX/Y+d)           RET cc                  SCF
            OR A,n
            OR A,r                  RETI                    SET b,(HL)
                                                            SET b,(IX/Y+d)
            OTD2R                   RETN                    SET b,r

            OTDM                    RL (HL)                 SLA (HL)
            OTDMR                   RL (IX/Y+d)             SLA (IX/Y+d)

            ASEZ80 ASSEMBLER                                       PAGE AV-7
            EZ80 ADDRESSING AND INSTRUCTIONS

            SLA r                   STMIX                   TSTIO n

            SLP                     SUB A,(HL)              XOR A,(HL)
                                    SUB A,ir                XOR A,ir
            SRA (HL)                SUB A,(IX/Y+d)          XOR A,(IX/Y+d)
            SRA (IX/Y+d)            SUB A,n                 XOR A,n
            SRA r                   SUB A,r                 XOR A,r

            SRL (HL)                TST A,(HL)
            SRL (IX/Y+d)            TST A,n
            SRL r                   TST A,r

               The  accumulator  'A' argument is optional in all of the fol-
            lowing instructions:

            ADC A,...               CP A,...                SUB A,...
            ADD A,...               OR A,...                TST A,...
            AND A,...               SBC A,...               XOR A,...

               The  following  tables,  organized by instruction type, lists
            all possible EZ80/Z80  mnemonic  extensions  recognized  by  the
            ASEZ80  assembler.   The designation [] refers to a required ad-
            dressing mode argument shown in the table  above.   The  allowed
            mnemonic  suffixes  are  denoted within the enclosing delimiters
            ().  Mnemonics specified with illegal  or  unrecognized  suffixs
            will be flagged with q or a errors.

            AV.3.3  Arithmetic Instructions

                    adc (.l, .s)    [],[]
                    add (.l, .s)    [],[]
                    cp  (.l, .s)    [],[]
                    daa
                    dec (.l, .s)    []
                    inc (.l, .s)    []
                    mlt (.l, .s)    []
                    neg
                    sbc (.l, .s)    [],[]
                    sub (.l, .s)    [],[]

            ASEZ80 ASSEMBLER                                       PAGE AV-8
            EZ80 ADDRESSING AND INSTRUCTIONS

            AV.3.4  Bit Manipulation Instructions

                    bit (.l, .s)    [],[]
                    res (.l, .s)    [],[]
                    set (.l, .s)    [],[]

            AV.3.5  Block Transfer and Compare Instructions

                    cpd (.l, .s)            cpdr (.l, .s)
                    cpi (.l, .s)            cpir (.l, .s)
                    ldd (.l, .s)            lddr (.l, .s)
                    ldi (.l, .s)            ldir (.l, .s)

            AV.3.6  Exchange Instructions

                    ex (.l, .s)     [],[]
                    exx

            AV.3.7  Input/Output Instructions

                    in      [],[]           in0     [],[]
                    ind   (.l, .s)          indr  (.l, .s)
                    indx  (.l, .s)
                    ind2  (.l, .s)          ind2r (.l, .s)
                    indm  (.l, .s)          indmr (.l, .s)
                    ini   (.l, .s)          inir  (.l, .s)
                    inim  (.l, .s)          inimr (.l, .s)
                    otdm  (.l, .s)          otdmr (.l, .s)
                    otdrx (.l, .s)
                    otim  (.l, .s)          otimr (.l, .s)
                    otirx (.l, .s)
                    out   (.l, .s)  [],[]
                    out0  (.l, .s)  [],[]
                    outd  (.l, .s)          otdr  (.l, .s)
                    outd2 (.l, .s)          otdr2 (.l, .s)
                    outi  (.l, .s)          otir  (.l, .s)
                    outi2 (.l, .s)          oti2r (.l, .s)
                    tstio   []

            ASEZ80 ASSEMBLER                                       PAGE AV-9
            EZ80 ADDRESSING AND INSTRUCTIONS

            AV.3.8  Load Instructions

                    ld   (.l, .s, .il, .is, .lil, .sis)     [],[]
                    lea  (.l, .s)   []      pea  (.l, .s)   []
                    pop  (.l, .s)   []      push (.l, .s)   []

            AV.3.9  Logical Instructions

                    and (.l, .s)    [],[]
                    cpl (.l, .s)
                    or  (.l, .s)    [],[]
                    tst (.l, .s)    [],[]
                    xor (.l, .s)    [],[]

            AV.3.10  Processor Control Instructions

                    ccf             di              ei
                    halt            im              nop
                    rsmix           stmix
                    scf             slp

            AV.3.11  Program Flow Instructions

                    call (.il, .is)         []
                    call (.il, .is)         CC,[]
                    djnz    []
                    jp   (.l, .s, .lil, .sis)       []
                    jp   (.l, .s, .lil, .sis)       CC,[]
                    jr      []
                    jr      CC,[]
                    ret  (.l)
                    ret  (.l)       CC
                    reti (.l)
                    retn (.l)
                    rst  (.l, .s)   []

            AV.3.12  Shift and Rotate Instructions

                    rl  (.l, .s)    []      rla
                    rlc (.l, .s)    []      rlca
                    rld                     rrd
                    rr  (.l, .s)    []      rra
                    rrc (.1, .s)    []      rrca
                    sla (.l, .s)    []
                    sra (.l, .s)    []
                    srl (.l, .s)    []

                                       APPENDIX AW

                                    ASF2MC8 ASSEMBLER

            AW.1  PROCESSOR SPECIFIC DIRECTIVES

               The ASF2MC8 assembler supports the F2MC8L and F2MC8FX proces-
            sor cores.

            AW.1.1  .8L Directive

            Format:

                    .8L

            The  .8L  directive selects the F2MC8L processor cycle counts to
            be listed.  This is the default selection if no processor direc-
            tive is specified in the source assemby file.

            AW.1.2  .8FX Directive

            Format:

                    .8FX

            The .8FX directive selects the F2MC8FX processor cycle counts to
            be listed.  .8L is the default selection if no processor  direc-
            tive is specified in the source assemby file.

            ASF2MC8 ASSEMBLER                                      PAGE AW-2
            PROCESSOR SPECIFIC DIRECTIVES

            AW.1.3  The .__.CPU.  Variable

               The value of the pre-defined symbol '.__.CPU.' corresponds to
            the selected processor type.  The default value is 0 which  cor-
            responds  to  the  default  processor type.  The following table
            lists the processor types and associated values for the  ASF2MC8
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                        .8L                          0
                        .8FX                         1

               The  variable  '.__.CPU.'  is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

               The  assembler  .globl  directive  may  be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            AW.2  F2MC8L/F2MC8FX REGISTERS

               The  following  is a list of register designations recognized
            by the ASF2MC8 assembler:

                    pc              -       Program Counter

                    a               -       Accumulator

                    t               -       Temporary Accumulator

                    ix              -       Index Register

                    ep              -       Extra Pointer

                    sp              -       Stack Pointer

                    ps              -       Program Status

                    r0,r1,r2,r3,    -       Memory Registers
                    r4,r5,r6,r7             32 banks of
                                            8 registers each

            ASF2MC8 ASSEMBLER                                      PAGE AW-3
            F2MC8L/F2MC8FX INSTRUCTION SET

            AW.3  F2MC8L/F2MC8FX INSTRUCTION SET

               The  following  list specifies the format for each addressing
            mode supported by ASF2MC8:

                    #data           immediate data
                                    byte or word data

                    *dir            direct page addressing

                    *dir:b          bit addressing to a
                                    direct page address

                    ext             extended addressing

                    a,t             register addressing
                    pc,sp,ix,ep

                    @a              accumulator indexed

                    @ix+d           indexed addressing
                                    plus offset

                    @ix             indexed addressing
                                    with a zero offset

                    @ep             pointer addressing

                    r               General-purpose registers

                    label           call/jmp/branch label

            The  terms  data,  dir,  ext, b, d, and label may all be expres-
            sions.

               Note  that  not all addressing modes are valid with every in-
            struction, refer to the F2MC8L/F2MC8FX technical data for  valid
            modes.

               The following tables list all F2MC8L/F2MC8FX mnemonics recog-
            nized by the ASF2MC8 assembler.  The designation [] refers to  a
            required addressing mode argument.

            ASF2MC8 ASSEMBLER                                      PAGE AW-4
            F2MC8L/F2MC8FX INSTRUCTION SET

            AW.3.1  Transfer Instructions

                    mov     [],[]           movw    [],[]
                    xch     [],[]           xchw    [],[]
                    clrb    []              setb    []
                    swap    []

            AW.3.2  Operation Instructions

                    addc    a(,[])          addcw   a
                    subc    a(,[])          subcw   a
                    inc     r               incw    []
                    dec     r               decw    []
                    mulu    a               divu    a
                    and     a(,[])          andw    a
                    cmp     a(,[])          cmpw    a
                    or      a(,[])          orw     a
                    xor     a(,[])          xorw    a
                    rolc    a               rorc    a
                    daa                     das

            AW.3.3  Branch/Jump/Call Instructions

                    bz      label           bew     label
                    bnz     label           bne     label
                    bc      label           blo     label
                    bnc     label           bhs     label
                    bn      label           bp      label
                    blt     label           bge     label
                    bbc     *dir:b,label    bbs     *dir:b,label
                    jmp     []              call    label
                    callv   #data           xchw    a,pc
                    ret                     reti

            AW.3.4  Other Instructions

                    pushw   []              popw    []
                    nop
                    clrc                    setc
                    clri                    seti

                                       APPENDIX AX

                                     ASGB ASSEMBLER

            AX.1  ACKNOWLEDGEMENT

               Thanks  to  Roger Ivie for his contribution of the ASGB cross
            assembler.

                    Roger Ivie
                    ivie at cc dot usu dot edu

            AX.2  INTRODUCTION

               The  Gameboy uses an 8-bit processor which is closely related
            to the 8080.  It is usually described as a modified Z80, but may
            be more closely understood as an enhanced 8080;  it has the 8080
            register set and many, but not all, enhanced  Z80  instructions.
            However,  even  this is not accurate, for the Gameboy also lacks
            some basic 8080 instructions (most annoyingly  SHLD  and  LHLD).
            ASGB is based on ASZ80 and therefore uses the Z80 mnemonic set.

            AX.3  GAMEBOY REGISTER SET AND CONDITIONS

               The following is a complete list of register designations and
            condition mnemonics:

                    byte registers - a,b,c,d,e,h,l
                    register pairs - af, bc, de, hl
                    word registers - pc, sp

                    C  - carry bit set
                    NC - carry bit clear
                    NZ - zero bit clear
                    Z  - zero bit set

            ASGB ASSEMBLER                                         PAGE AX-2
            GAMEBOY INSTRUCTION SET

            AX.4  GAMEBOY INSTRUCTION SET

               The following tables list all Gameboy mnemnoics recognized by
            the ASGB assembler.  The designation [] refers to a required ad-
            dressing mode argument.  The following list specifies the format
            for each addressing mode supported by ASGB:

                    #data           immediate data
                                    byte or word data

                    n               byte value

                    rg              a byte register
                                    a,b,c,d,e,h,l

                    rp              a register pair or 16-bit register
                                    bc,de,hl

                    (hl)            implied addressing or
                                    register indirect addressing

                    (label)         direct addressing

                    label           call/jmp/jr label

               The terms data, dir, and ext may all be expression.  The term
            dir is not allowed to be an external reference.

               Note  that  not all addressing modes are valid with every in-
            struction.  Although official information is not, as  far  as  I
            know, publically available for the Gameboy processor, many unof-
            ficial sources are available on the internet.

            AX.4.1  .tile Directive

            Format:

                            .tile  /string/         or

                            .tile ^/string/

            where:  string  is  a  string of ascii characters taken from the
                            set ' ', '.', '+', '*', '0', '1', '2', and  '3'.
                            The   string   must   be  a  multiple  of  eight
                            characters long.

            ASGB ASSEMBLER                                         PAGE AX-3
            GAMEBOY INSTRUCTION SET

                    /  /     represent  the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters  do  not match, the .tile
                            directive will give the (q) error.

                 The Gameboy displays information on the screen using a pro-
            grammable character set (referred to as  "tiles"  among  Gameboy
            developers).   The ASGB cross assembler has a processor-specific
            assembler directive  to  aid  in  the  creation  of  the  game's
            character set.

                 Each  character is created from an 8x8 grid of pixels, each
            pixel of which is composed of two bits.  The .tile directive ac-
            cepts  a single string argument which is processed to create the
            byte  values  corresponding  to  the  lines  of  pixels  in  the
            character.   The  string  argument  must  be  some multiple of 8
            characters long, and be one of these characters:

                    ' ' or '0' - for the pixel value 00
                    '.' or '1' - for the pixel value 01
                    '+' or '2' - for the pixel value 10
                    '*' or '3' - for the pixel value 11

                 The .tile directive processes each 8-character group of its
            string argument to create the two-byte  value  corresponding  to
            that  line of pixels.  The example in the popular extant litera-
            ture could be done using ASGB like this:

               0000 7C 7C                 1         .tile " *****  "
               0002 00 C6                 2         .tile "++   ++ "
               0004 C6 00                 3         .tile "..   .. "
               0006 00 FE                 4         .tile "+++++++ "
               0008 C6 C6                 5         .tile "**   ** "
               000A 00 C6                 6         .tile "++   ++ "
               000C C6 00                 7         .tile "..   .. "
               000E 00 00                 8         .tile "        "

                 Or, using the synonym character set, as:

               0010 7C 7C                10         .tile "03333300"
               0012 00 C6                11         .tile "22000220"
               0014 C6 00                12         .tile "11000110"
               0016 00 FE                13         .tile "22222220"
               0018 C6 C6                14         .tile "33000330"
               001A 00 C6                15         .tile "22000220"
               001C C6 00                16         .tile "11000110"
               001E 00 00                17         .tile "00000000"

            ASGB ASSEMBLER                                         PAGE AX-4
            GAMEBOY INSTRUCTION SET

                 Since .tile is perfectly willing to assemble multiple lines
            of a character at once (as long as it is given complete rows  of
            pixels), it could even be done as:

                    .tile " *****  ++   ++ ..   .. +++++++ "
                    .tile "**   ** ++   ++ ..   ..         "

            AX.4.2  Potentially Controversial Mnemonic Selection

                 Although the Gameboy processor is based on the Z80, it does
            include some features which are not present in the Z80.  The Z80
            mnemonic  set  is  not  sufficient  to describe these additional
            operations;  mnemonics must be created for the  new  operations.
            The  mnemonics ASGB uses are not the same as those used by other
            publically-available Gameboy assemblers.

            AX.4.2.1  Auto-Indexing Loads  -

                 The  Gameboy provides instructions to load or store the ac-
            cumulator indirectly via HL and then subsequently  increment  or
            decrement HL.  ASGB uses the mnemonic 'ldd' for the instructions
            which decrement HL and 'ldi' for the instructions  which  incre-
            ment  HL.   Because the Gameboy lacks the Z80's block moves, the
            mnemonics are not otherwise needed by ASGB.

                    ldd a,(hl)      ldd (hl),a
                    ldi a,(hl)      ldi (hl),a

            AX.4.2.2  Input and Output Operations  -

                 The  Gameboy  replaces the Z80's separate address space for
            I/O with a mechanism similar to the zero page addressing of pro-
            cessors  such  as  the  6800  or 6502.  All I/O registers in the
            Gameboy reside in the address range between 0xff00  and  0xffff.
            The  Gameboy adds special instructions to load and store the ac-
            cumulator from and into this page of memory.   The  instructions
            are  analogous to the Z80's in and out instructions and ASGB re-
            tains the 'in' and 'out' mnemonics for them.

                    in a,(n)        out (n),a
                    in a,(c)        out (c),a

                 From  ASGB's  perspective,  the  RAM  available from 0xff80
            through 0xffff is composed of unused I/O locations  rather  than
            direct-page RAM.

            ASGB ASSEMBLER                                         PAGE AX-5
            GAMEBOY INSTRUCTION SET

            AX.4.2.3  The 'stop' Instruction  -

                 The  publically-available  documentation  for  the  Gameboy
            lists the 'stop' instruction as the two-byte instruction 10  00,
            and the other freely-available Gameboy assemblers assemble it in
            that manner.  As far as I can tell, the only rationale for  this
            is  that  the  corresponding Z80 instruction ('djnz label') is a
            two-byte instruction.  ASGB assembles 'stop' as the one-byte in-
            struction 10.

            AX.4.3  Inherent Instructions

                    ccf             cpl
                    daa             di
                    ei              nop
                    halt            rla
                    rlca            rra
                    rrca            scf
                    reti            stop
                    swap

            AX.4.4  Implicit Operand Instructions

                    adc a,[]        adc []
                    add a,[]        add []
                    and a,[]        and []
                    cp a,[]         cp []
                    dec a,[]        dec []
                    inc a,[]        inc []
                    or a,[]         or []
                    rl a,[]         rl []
                    rlc a,[]        rlc []
                    rr a,[]         rr []
                    rrc a,[]        rrc []
                    sbc a,[]        sbc []
                    sla a,[]        sla []
                    sra a,[]        sra []
                    srl a,[]        srl []
                    sub a,[]        sub []
                    xor a,[]        xor []

            ASGB ASSEMBLER                                         PAGE AX-6
            GAMEBOY INSTRUCTION SET

            AX.4.5  Load Instructions

                    ld rg,[]        ld [],rg
                    ld (bc),a       ld a,(bc)
                    ld (de),a       ld a,(de)
                    ld (label),a    ld a,(label)
                    ld (label),sp   ld rp,#data
                    ld sp,hl        ld hl,sp

                    ldd a,(hl)      ldd (hl),a
                    ldi a,(hl)      ldi (hl),a

            AX.4.6  Call/Return Instructions

                    call C,label    ret C
                    call NC,label   ret NC
                    call Z,label    ret Z
                    call NZ,label   ret NZ
                    call label      ret

                    rst n

            AX.4.7  Jump Instructions

                    jp C,label      jp NC,label
                    jp Z,label      jp NZ,label

                    jp (hl)         jp label

                    jr C,label      jr NC,label
                    jr Z,label      jr NZ,label
                    jr label

            AX.4.8  Bit Manipulation Instructions

                    bit n,[]
                    res n,[]
                    set n,[]

            ASGB ASSEMBLER                                         PAGE AX-7
            GAMEBOY INSTRUCTION SET

            AX.4.9  Input and Output Instructions

                    in a,(n)        in a,(c)
                    out (n),a       out (c),a

            AX.4.10  Register Pair Instructions

                    add hl,rp       add hl,sp
                    add sp,#data

                    push rp         pop rp

                                       APPENDIX AY

                                     ASH8 ASSEMBLER

            AY.1  H8/3XX REGISTER SET

            The following is a list of the H8 registers used by ASH8:

                    r0  -  r7,sp            16-bit accumulators
                    r0L -  r7L,spL          8-bit accumulators
                    r0H -  r7H,spH          8-bit accumulators
                    spL,spH,sp              stack pointers
                    ccr                     condition code

            AY.2  H8/3XX INSTRUCTION SET

                 The  following  tables list all H8/3xx mnemonics recognized
            by the ASH8 assembler.  The designation [] refers to a  required
            addressing  mode  argument.   The  following  list specifies the
            format for each addressing mode supported by ASH8:

                    #xx:3           immediate data (3  bit)
                    #xx:8           immediate data (8  bit)
                    #xx:16          immediate data (16 bit)

                    *dir            direct page addressing
                                    (see .setdp directive)
                                    0xFF00 <= dir <= 0xFFFF

                    label           branch label

                    rn              registers (16 bit)
                                    r0-r7,sp

                    rnB             registers (8 bit)
                                    r0H-r7H,r0L-r7L,spH,spL

            ASH8 ASSEMBLER                                         PAGE AY-2
            H8/3XX INSTRUCTION SET

                    ccr             condition code register

                    @rn             register indirect

                    @-rn            register indirect (auto pre-decrement)

                    @rn+            register indirect (auto post-increment)

                    @[offset,rn]    register indirect, 16-bit displacement

                    @@offset        memory indirect, (8-bit address)

                    ext             extended addressing (16-bit)

            The  terms  data, dir, label, offset, and ext may all be expres-
            sions.

                 Note that not all addressing modes are valid with every in-
            struction, refer to the H8/3xx technical data for valid modes.

            AY.2.1  Inherent Instructions

                    eepmov
                    nop
                    sleep
                    rte
                    rts

            AY.2.2  Branch Instructions

                    bcc     label                   bcs     label
                    beq     label                   bf      label
                    bge     label                   bgt     label
                    bhi     label                   bhis    label
                    bhs     label                   ble     label
                    blo     label                   blos    label
                    bls     label                   blt     label
                    bmi     label                   bne     label
                    bpl     label                   bra     label
                    brn     label                   bt      label
                    bvc     label                   bvs     label
                    bsr     label

            ASH8 ASSEMBLER                                         PAGE AY-3
            H8/3XX INSTRUCTION SET

            AY.2.3  Single Operand Instructions

                    Free Form

                    daa     rnB                     das     rnB

                    dec     rnB                     inc     rnB

                    neg     rnB                     not     rnB

                    rotxl   rnB                     rotxr   rnB

                    rotl    rnB                     rotr    rnB

                    shal    rnB                     shar    rnB

                    shll    rnB                     shlr    rnB

                    push    rn                      pop     rn

                    Byte / Word Form

                    daa.b   rnB                     das.b   rnB

                    dec.b   rnB                     inc.b   rnB

                    neg.b   rnB                     not.b   rnB

                    rotxl.b rnB                     rotxr.b rnB

                    rotl.b  rnB                     rotr.b  rnB

                    shal.b  rnB                     shar.b  rnB

                    shll.b  rnB                     shlr.b  rnB

                    push.w  rn                      pop.w   rn

            ASH8 ASSEMBLER                                         PAGE AY-4
            H8/3XX INSTRUCTION SET

            AY.2.4  Double Operand Instructions

                    Free Form

                    add     rnB,rnB                 add     #xx:8,rnB
                    add     rn,rn
                    adds    #1,rn                   adds    #2,rn
                    addx    rnB,rnB                 addx    #xx:8,rnB

                    cmp     rnB,rnB                 cmp     #xx:8,rnB
                    cmp     rn,rn

                    sub     rnB,rnB
                    sub     rn,rn
                    subs    #1,rn                   subs    #2,rn
                    subx    rnB,rnB                 subx    #xx:8,rnB

                    and     rnB,rnB                 and     #xx:8,rnB
                                                    and     #xx:8,ccr

                    or      rnB,rnB                 or      #xx:8,rnB
                                                    or      #xx:8,ccr

                    xor     rnB,rnB                 xor     #xx:8,rnB
                                                    xor     #xx:8,ccr

                    Byte / Word Form

                    add.b   rnB,rnB                 add.b   #xx:8,rnB
                    add.w   rn,rn

                    cmp.b   rnB,rnB                 cmp.b   #xx:8,rnB
                    cmp.w   rn,rn

                    sub.b   rnB,rnB
                    sub.w   rn,rn

                    addx.b  rnB,rnB                 addx.b  #xx:8,rnB

                    and.b   rnB,rnB                 and.b   #xx:8,rnB
                                                    and.b   #xx:8,ccr

                    or.b    rnB,rnB                 or.b    #xx:8,rnB
                                                    or.b    #xx:8,ccr

                    subx.b  rnB,rnB                 subx.b  #xx:8,rnB

                    xor.b   rnB,rnB                 xor.b   #xx:8,rnB
                                                    xor.b   #xx:8,ccr

            ASH8 ASSEMBLER                                         PAGE AY-5
            H8/3XX INSTRUCTION SET

            AY.2.5  Mov Instructions

                    Free Form

                    mov     rnB,rnB                 mov     rn,rn
                    mov     #xx:8,rnB               mov     #xx:16,rn
                    mov     @rn,rnB                 mov     @rn,rn
                    mov     @[offset,rn],rnB        mov     @[offset,rn],rn
                    mov     @rn+,rnB                mov     @rn+,rn
                    mov     @dir,rnB
                    mov     dir,rnB
                    mov     *@dir,rnB
                    mov     *dir,rnB
                    mov     @label,rnB              mov     @label,rn
                    mov     label,rnB               mov     label,rn
                    mov     rnB,@rn                 mov     rn,@rn
                    mov     rnB,@[offset,rn]        mov     rn,@[offset,rn]
                    mov     rnB,@-rn                mov     rn,@-rn
                    mov     rnB,@dir
                    mov     rnB,dir
                    mov     rnB,*@dir
                    mov     rnB,*dir
                    mov     rnB,@label              mov     rn,@label
                    mov     rnB,label               mov     rn,label

                    Byte / Word Form

                    mov.b   rnB,rnB                 mov.w   rn,rn
                    mov.b   #xx:8,rnB               mov.w   #xx:16,rn
                    mov.b   @rn,rnB                 mov.w   @rn,rn
                    mov.b   @[offset,rn],rnB        mov.w   @[offset,rn],rn
                    mov.b   @rn+,rnB                mov.w   @rn+,rn
                    mov.b   @dir,rnB
                    mov.b   dir,rnB
                    mov.b   *@dir,rnB
                    mov.b   *dir,rnB
                    mov.b   @label,rnB              mov.w   @label,rn
                    mov.b   label,rnB               mov.w   label,rn
                    mov.b   rnB,@rn                 mov.w   rn,@rn
                    mov.b   rnB,@[offset,rn]        mov.w   rn,@[offset,rn]
                    mov.b   rnB,@-rn                mov.w   rn,@-rn
                    mov.b   rnB,@dir
                    mov.b   rnB,dir
                    mov.b   rnB,*@dir
                    mov.b   rnB,*dir
                    mov.b   rnB,@label              mov.w   rn,@label
                    mov.b   rnB,label               mov.w   rn,label

            ASH8 ASSEMBLER                                         PAGE AY-6
            H8/3XX INSTRUCTION SET

            AY.2.6  Bit Manipulation Instructions

                    bld     #xx:3,rnB               bld     #xx:3,@rn
                    bld     #xx:3,@dir              bld     #xx:3,dir
                    bld     #xx:3,*@dir             bld     #xx:3,*dir

                    bild    #xx:3,rnB               bild    #xx:3,@rn
                    bild    #xx:3,@dir              bild    #xx:3,dir
                    bild    #xx:3,*@dir             bild    #xx:3,*dir

                    bst     #xx:3,rnB               bst     #xx:3,@rn
                    bst     #xx:3,@dir              bst     #xx:3,dir
                    bst     #xx:3,*@dir             bst     #xx:3,*dir

                    bist    #xx:3,rnB               bist    #xx:3,@rn
                    bist    #xx:3,@dir              bist    #xx:3,dir
                    bist    #xx:3,*@dir             bist    #xx:3,*dir

                    band    #xx:3,rnB               band    #xx:3,@rn
                    band    #xx:3,@dir              band    #xx:3,dir
                    band    #xx:3,*@dir             band    #xx:3,*dir

                    biand   #xx:3,rnB               biand   #xx:3,@rn
                    biand   #xx:3,@dir              biand   #xx:3,dir
                    biand   #xx:3,*@dir             biand   #xx:3,*dir

                    bor     #xx:3,rnB               bor     #xx:3,@rn
                    bor     #xx:3,@dir              bor     #xx:3,dir
                    bor     #xx:3,*@dir             bor     #xx:3,*dir

                    bior    #xx:3,rnB               bior    #xx:3,@rn
                    bior    #xx:3,@dir              bior    #xx:3,dir
                    bior    #xx:3,*@dir             bior    #xx:3,*dir

                    bxor    #xx:3,rnB               bxor    #xx:3,@rn
                    bxor    #xx:3,@dir              bxor    #xx:3,dir
                    bxor    #xx:3,*@dir             bxor    #xx:3,*dir

                    bixor   #xx:3,rnB               bixor   #xx:3,@rn
                    bixor   #xx:3,@dir              bixor   #xx:3,dir
                    bixor   #xx:3,*@dir             bixor   #xx:3,*dir

            ASH8 ASSEMBLER                                         PAGE AY-7
            H8/3XX INSTRUCTION SET

            AY.2.7  Extended Bit Manipulation Instructions

                    bset    #xx:3,rnB               bset    #xx:3,@rn
                    bset    #xx:3,@dir              bset    #xx:3,dir
                    bset    #xx:3,*@dir             bset    #xx:3,*dir
                    bset    rnB,rnB                 bset    rnB,@rn
                    bset    rnB,@dir                bset    rnB,dir
                    bset    rnB,*@dir               bset    rnB,*dir

                    bclr    #xx:3,rnB               bclr    #xx:3,@rn
                    bclr    #xx:3,@dir              bclr    #xx:3,dir
                    bclr    #xx:3,*@dir             bclr    #xx:3,*dir
                    bclr    rnB,rnB                 bclr    rnB,@rn
                    bclr    rnB,@dir                bclr    rnB,dir
                    bclr    rnB,*@dir               bclr    rnB,*dir

                    bnot    #xx:3,rnB               bnot    #xx:3,@rn
                    bnot    #xx:3,@dir              bnot    #xx:3,dir
                    bnot    #xx:3,*@dir             bnot    #xx:3,*dir
                    bnot    rnB,rnB                 bnot    rnB,@rn
                    bnot    rnB,@dir                bnot    rnB,dir
                    bnot    rnB,*@dir               bnot    rnB,*dir

                    btst    #xx:3,rnB               btst    #xx:3,@rn
                    btst    #xx:3,@dir              btst    #xx:3,dir
                    btst    #xx:3,*@dir             btst    #xx:3,*dir
                    btst    rnB,rnB                 btst    rnB,@rn
                    btst    rnB,@dir                btst    rnB,dir
                    btst    rnB,*@dir               btst    rnB,*dir

            AY.2.8  Condition Code Instructions

                    andc    #xx:8,ccr               andc    #xx:8
                    and     #xx:8,ccr               and.b   #xx:8,ccr

                    ldc     #xx:8,ccr               ldc     #xx:8
                    ldc     rnB,ccr                 ldc     rnB

                    orc     #xx:8,ccr               orc     #xx:8
                    or      #xx:8,ccr               or.b    #xx:8,ccr

                    xorc    #xx:8,ccr               xorc    #xx:8
                    xor     #xx:8,ccr               xor.b   #xx:8,ccr

                    stc     ccr,rnB                 stc     rnB

            ASH8 ASSEMBLER                                         PAGE AY-8
            H8/3XX INSTRUCTION SET

            AY.2.9  Other Instructions

                    divxu   rnB,rn                  divxu.b rnB,rn

                    mulxu   rnB,rn                  mulxu.b rnB,rn

                    movfpe  @label,rnB              movfpe  label,rnB
                    movfpe.b  @label,rnB            movfpe.b  label,rnB

                    movtpe  @label,rnB              movtpe  label,rnB
                    movtpe.b  @label,rnB            movtpe.b  label,rnB

            AY.2.10  Jump and Jump to Subroutine Instructions

                    jmp     @rn                     jmp     @@dir
                    jmp     @label                  jmp     label

                    jsr     @rn                     jsr     @@dir
                    jsr     @label                  jsr     label

                                       APPENDIX AZ

                                     ASM8C ASSEMBLER

            AZ.1  M8C REGISTER SET

            The following is a list of the M8C registers used by ASM8C:

                    A       -   Accumulator
                    X       -   Index
                    SP      -   Stack Pointer
                    F       -   Flags

            AZ.2  M8C ADDRESSING MODES

                 The  M8C  instructions  may have none, one, or two operands
            selected from the registers listed above or an  addressing  mode
            from the following list:

                    expr         -  immediate argument
                                 -  In the lcall, ljmp, index,
                                    and pc relative branching
                                    instructions expr is an
                                    address expression.
                    #expr        -  immediate argument
                    [expr]       -  argument at location expr
                    [x+expr]     -  argument at location x + expr
                    reg[expr]    -  argument at location expr
                                    in register space
                    reg[x+expr]  -  argument at location x + expr
                                    in register space
                    [[expr]++]   -  The value in memory at address
                                    expr (the indirect address)
                                    points to a memory location in
                                    RAM. The value in memory at
                                    address expr is then incremented.
                                    This addressing mode is used only
                                    by the mvi instruction and

            ASM8C ASSEMBLER                                        PAGE AZ-2
            M8C ADDRESSING MODES

                                    allows the short form [expr]
                                    for this addressing mode.

            AZ.3  M8C INSTRUCTION SET

                 The  following tables list all M8C mnemonics and addressing
            modes recognized by the ASM8C assembler.

            AZ.3.1  Double Operand Arithmetic Instructions

                    adc  a,expr
                    adc  a,[expr]           adc  [expr],a
                    adc  a,[x+expr]         adc  [x+expr],a
                    adc  [expr],expr        adc  [x+expr],expr

                    add  a,expr
                    add  a,[expr]           add  [expr],a
                    add  a,[x+expr]         add  [x+expr],a
                    add  [expr],expr        add  [x+expr],expr
                    add  sp,expr

                    cmp  a,expr
                    cmp  a,[expr]
                    cmp  a,[x+expr]
                    cmp  [expr],expr        cmp  [x+expr],expr

                    sbb  a,expr
                    sbb  a,[expr]           sbb  [expr],a
                    sbb  a,[x+expr]         sbb  [x+expr],a
                    sbb  [expr],expr        sbb  [x+expr],expr

                    sub  a,expr
                    sub  a,[expr]           sub  [expr],a
                    sub  a,[x+expr]         sub  [x+expr],a
                    sub  [expr],expr        sub  [x+expr],expr

            ASM8C ASSEMBLER                                        PAGE AZ-3
            M8C INSTRUCTION SET

            AZ.3.2  Double Operand Logic Instructions

                    and  a,expr             and  f,expr
                    and  a,[expr]           and  [expr],a
                    and  a,[x+expr]         and  [x+expr],a
                    and  [expr],expr        and  [x+expr],expr
                    and  reg[expr],expr     and  reg[x+expr],expr

                    or   a,expr             or   f,expr
                    or   a,[expr]           or   [expr],a
                    or   a,[x+expr]         or   [x+expr],a
                    or   [expr],expr        or   [x+expr],expr
                    or   reg[expr],expr     or   reg[x+expr],expr

                    xor  a,expr             xor  f,expr
                    xor  a,[expr]           xor  [expr],a
                    xor  a,[x+expr]         xor  [x+expr],a
                    xor  [expr],expr        xor  [x+expr],expr
                    xor  reg[expr],expr     xor  reg[x+expr],expr

            AZ.3.3  Miscellaneous Double Operand Instructions

                    swap a,x                swap a,sp
                    swap a,[expr]           swap a,[x+expr]

                    tst  [expr]             tst  [x+expr]
                    tst  reg[expr]          tst  reg[x+expr]

            AZ.3.4  Single Operand Shift/Rotate Instructions

                    asl  a
                    asl  [expr]             asl  [x+expr]

                    asr  a
                    asr  [expr]             asr  [x+expr]

                    rlc  a
                    rlc  [expr]             rlc  [x+expr]

                    rrc  a
                    rrc  [expr]             rrc  [x+expr]

            ASM8C ASSEMBLER                                        PAGE AZ-4
            M8C INSTRUCTION SET

            AZ.3.5  Miscellaneous Single Operand Instructions

                    cpl  a

                    dec  a                  dec  x
                    dec  [expr]             dec  [x+expr]

                    inc  a                  inc  x
                    inc  [expr]             inc  [x+expr]

                    pop  a                  pop  x
                    push a                  push x

                    tst  [expr]             tst  [x+expr]
                    tst  reg[expr]          tst  reg[x+expr]

            AZ.3.6  Move Instructions

                    mov  a,x
                    mov  a,expr
                    mov  a,[expr]           mov  [expr],a
                    mov  a[x+expr]          mov  [x+expr],a

                    mov  x,a                mov  x,sp
                    mov  x,expr
                    mov  x,[expr]           mov  [expr],x
                    mov  x,[x+expr]

                    mov  [expr],expr        mov  [x+expr],expr

                    mov  [expr],[expr]

                    mov  a,reg[expr]        mov  a,reg[x+expr]
                    mov  reg[expr],a        mov  reg[x+expr],a

                    mov  reg[expr],expr     mov  reg[x+expr],expr

                    mvi  a,[expr]      ==   mvi  a,[[expr]++]
                    mvi  [expr],a      ==   mvi  [[expr]++],a

            ASM8C ASSEMBLER                                        PAGE AZ-5
            M8C INSTRUCTION SET

            AZ.3.7  Inherent Instructions

                    halt                    nop
                    romx                    ssc
                    ret                     reti

            AZ.3.8  Branching Instructions

                    lcall expr              ljmp  expr
                    jz    expr              jnz   expr
                    jc    expr              jnc   expr
                    jacc  expr

            AZ.3.9  Relative Table Read Instruction

                    index expr

                                       APPENDIX BA

                                     ASPIC ASSEMBLER

            BA.1  PIC ASSEMBLER NOTES

            The  PIC  series  of  processors  uses  a non unified addressing
            scheme:  the instruction addressing is 1 per  instruction  word,
            each  instruction  uses  a  word of memory varying from 12 to 16
            bits in length.  The processor data is addressed as 1  per  byte
            of  data.   To properly address the program/data spaces you, the
            programmer, must seperate your program and  data  into  seperate
            code  and  data areas.  The data area is addressed as 1 per byte
            and the code area is addressed as 1 per instruction.

                 The assembler/linker processes the instruction code so that
            the linker will output 2 bytes for each instruction  word.   The
            instruction  word  address  will  be  the  file  encoded address
            divided by 2.

            BA.2  PROCESSOR SPECIFIC DIRECTIVES

                 The  ASPIC  assembler has several processor specific assem-
            bler directives.  These directives  specify  a  processor  name,
            select  a  PIC processor family type, define the maximum ram ad-
            dress, specify ram addresses that should not  be  accessed,  and
            define the register file address page.

            ASPIC ASSEMBLER                                        PAGE BA-2
            PROCESSOR SPECIFIC DIRECTIVES

            BA.2.1  .pic Directive

            Format:

                    .pic     /string/               or

                    .pic    ^/string/

            where:  string  represents a text string.  The string is the pic
                            processor type.

                    /  /    represent   the  delimiting  characters.   These
                            delimiters   may   be   any   paired    printing
                            characters,  as  long  as the characters are not
                            contained within  the  string  itself.   If  the
                            delimiting  characters  do  not  match, the .pic
                            directive will give the (q) error.

                 The assembler uses the delimited string to define a proces-
            sor  specific  symbol.   e.g:   "p12c508"  produces  the  symbol
            __12c508  having  a value of 1.  This symbol can then be used in
            an .ifdef/.else/.endif construct.

                 The  assembler should be configured by including directives
            similiar to the folowing at the beginning of your assembly file:

                    .pic            "p12c508"       ; Set PIC Name
                    .pic12bit                       ; Select PIC Type

                 The  ASPIC  assembler  will  then be configured for the PIC
            processor type "p12c508".  The .pic directive must  precede  the
            PIC  type  directive.  The PIC type directive configures the as-
            sembler based on the processor name and type selection.

                 An  alternate method to configure the ASPIC assembler is as
            follows:

                    .pic            "p12c508"       ; Set PIC Name
                    .include        "piccpu.def"    ; Selects PIC Type

                 To  define the special function register names, bit values,
            and memory constraints for  a  specific  processor  include  the
            appropriate definition file:

                    .include        "p12c508.def"   ; Definitions

            ASPIC ASSEMBLER                                        PAGE BA-3
            PROCESSOR SPECIFIC DIRECTIVES

            BA.2.2  .picnopic Directive

            Format:

                    .picnopic

                 This directive deselects all processor specific mnemonics.

            BA.2.3  .pic12bit Directive

            Format:

                    .pic12bit

                 This  directive selects the 12-bit instruction word mnemon-
            ics and opcode values to be used during the assembly process.

            BA.2.4  .pic14bit Directive

            Format:

                    .pic14bit

                 This  directive selects the 14-bit instruction word mnemon-
            ics and opcode values to be used during the assembly process.

            BA.2.5  .pic16bit Directive

            Format:

                    .pic16bit

                 This  directive selects the 16-bit instruction word mnemon-
            ics and opcode values to be used during the assembly process.

            BA.2.6  .pic20bit Directive

            Format:

                    .pic20bit

                 This directive selects 20-bit addressing and the 16-bit in-
            struction word mnemonics and opcode values to be used during the
            assembly process.

            ASPIC ASSEMBLER                                        PAGE BA-4
            PROCESSOR SPECIFIC DIRECTIVES

            BA.2.7  The .__.CPU.  Variable

                 The  value of the pre-defined symbol '.__.CPU.' corresponds
            to the selected processor type.  The default value  is  0  which
            corresponds  to the default processor type.  The following table
            lists the processor types and associated values  for  the  ASPIC
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                      .picnopic                      0
                      .pic12bit                      1
                      .pic14bit                      2
                      .pic16bit                      3
                      .pic20bit                      4

                 The  variable '.__.CPU.' is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

                 The  assembler  .globl  directive may be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            BA.2.8  .picfix Directive

            Format:

                    .picfix chip,   mnemonic,       value

                 This  directive  can  be used to "fix" or change the opcode
            value of any pic instruction of the currently selected pic type.
            e.g.:

                 .picfix    "p12c671",      "clrw", 0x0103

            will  change  the  "clrw"  instruction's opcode to 0x0103 if the
            current pic type is "p12c671".

            ASPIC ASSEMBLER                                        PAGE BA-5
            PROCESSOR SPECIFIC DIRECTIVES

            BA.2.9  .maxram Directive

            Format:

                    .maxram value

                 Where value is the highest allowed ram address

            BA.2.10  .badram Directive

            Format:

                    .badram address
                    .badram lo:hi

                 Where  address is a single location and lo:hi is a range of
            addresses that should not be used.   Multiple  locations  and/or
            ranges  may  be  specified  by  seperating  the arguments with a
            comma:

                    .badram         0x23, 0x28:0x2F, ...

                 The  ASPIC  assembler will report an error for any absolute
            register file address in the badram range.

            BA.2.11  .setdmm Directive

            Format:

                    .setdmm value

                 The  .setdmm (set Data Memory Map) directive is used to in-
            form the assembler and linker about  which  ram  bank  has  been
            selected for access.  The PIC17Cxxx microprocessor family allows
            upto 2 (or more) banks of 256 byte ram  blocks.   The  PIC18Cxxx
            microprocessor  family  allows  upto  16  banks  of 256 byte ram
            blocks.  The data memory map value must be set  on  a  256  byte
            boundary.  e.g.:

                 .setdmm    0x0F00

                 The  assembler  verifies  that  any absolute address to the
            register file is within the  256  byte  page.   External  direct
            references  are  assumed  by  the assembler to be in the correct
            area and have valid offsets.  The linker  will  check  all  page
            relocations  to verify that they are within the correct address-
            ing range.

            ASPIC ASSEMBLER                                        PAGE BA-6
            12-BIT OPCODE PIC

            BA.3  12-BIT OPCODE PIC

            The 12-bit opcode family of PIC processors support the following
            assembler arguments:
                    (*)f
                    (*)f,(#)d
                    (*)f,(#)b
                    (#)k
                    label

                    where:  f       register file address
                            d       destination select:
                                            (0, -> w), (1 -> f)
                                            the letters w or f may be used
                                            to select the destination
                            b       bit address in an 8-bit file register
                            k       literal constant
                            label   label name

                    Items enclosed in () are optional.

               The  terms  f, d, b, k, and label may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction,  refer to the processor specific  technical data for
            valid modes.

                PIC12C5XX CPU Type
                    PIC12C508,      PIC12C509,      PIC12CE518
                    PIC12C508A,     PIC12C509A,     PIC12CE519
                    PIC12CR509A

            BA.4  14-BIT OPCODE PIC

            The 14-bit opcode family of PIC processors support the following
            assembler arguments:
                    (*)f
                    (*)f,(#)d
                    (*)f,(#)b
                    (#)k
                    label

                    where:  f       register file address
                            d       destination select:
                                            (0, -> w), (1 -> f)
                                            the letters w or f may be used
                                            to select the destination

            ASPIC ASSEMBLER                                        PAGE BA-7
            14-BIT OPCODE PIC

                            b       bit address in an 8-bit file register
                            k       literal constant
                            label   label name

                    Items enclosed in () are optional.

               The  terms  f, d, b, k, and label may all be expressions.

               Note  that  not all addressing modes are valid with every in-
            struction,  refer to the processor specific  technical data for
            valid modes.

                PIC12C67X CPU Type
                    PIC12C671,      PIC12C672,      PIC12LC671,
                    PIC12LC672
                    PIC12CE673,     PIC12CE674,     PIC12LCE673,
                    PIC12LCE674

                PIC14000 CPU Type
                    PIC14000

                PIC16C15X CPU Type
                    PIC16C154,      PIC16C156,      PIC16C158
                    PIC16CR154,     PIC16CR156,     PIC16CR158

                PIC16C5X CPU Type
                    PIC16C52
                    PIC16C54,       PICC16C54A,     PIC16C54B,
                    PIC16C54C
                    PIC16CR54,      PIC16CR54A,     PIC16C54B,
                    PIC16CR54C
                    PIC16C55,       PIC16C55A,      PIC16C56,
                    PIC16C56A
                    PIC16CR56A
                    PIC16C57,       PIC16CR57A,     PIC16C57B,
                    PIC16C57C
                    PIC16C58A,      PIC16CR58A,     PIC16C58B,
                    PIC16CR58B

                PIC16C55X CPU Type
                    PIC16C554,      PIC16C556,      PIC16C558

                PIC16C62X, PIC16C64X and, PIC16C66X CPU Types
                    PIC16C620,      PIC16C621,      PIC16C622
                    PIC16C642,      PIC16C662

                PIC16C7XX CPU Type
                    PIC16C71,       PIC16C72,       PIC16CR72
                    PIC16C73A,      PIC16C74A,      PIC16C76,       PIC16C77
                    PIC16C710,      PIC16C711,      PIC16C715

            ASPIC ASSEMBLER                                        PAGE BA-8
            14-BIT OPCODE PIC

                PIC16C8X CPU Type
                    PIC16F83,       PIC16CR83,      PIC16F84,
                    PIC16CR84
                    PIC16HV540
                    PIC16F627,      PIC16F628
                    PIC16F870,      PIC16F871,      PIC16F872,
                    PIC16F873
                    PIC16F874,      PIC16F876,      PIC16F877

                PIC16C9XX CPU Type
                    PIC16C923,      PIC16C924

            BA.5  16-BIT OPCODE PIC

            The 16-bit opcode family of PIC processors support the following
            assembler arguments:
                    (*)f
                    (*)f,(#)d
                    (*)f,(#)s
                    (*)f,(#)b
                    (*)f,(*)p       /       (*)p,(*)f
                    (#)t,(*)f
                    (#)t,(#)i,(*)f
                    {#}k
                    label

                    where:  f       register file address
                            d       destination select:
                                            (0, -> w), (1 -> f)
                                            the letters w or f may be used
                                            to select the destination
                            s       destination select:
                                            (0, -> f and w), (1, -> f)
                                            the letters w or f may be used
                                            to select the destination
                            t       table byte select:
                                            (0, -> lower byte)
                                            (1, -> upper byte)
                            i       table pointer control
                                            (0, -> no change)
                                            (1, -> post increment)
                            b       bit address of an 8-bit file register
                            p       peripheral register file address
                            k       literal constant
                            label   label name

                    Items enclosed in () are optional.

            ASPIC ASSEMBLER                                        PAGE BA-9
            16-BIT OPCODE PIC

               The  terms  f, d, s, t, i, b, p, k,  and  label  may  all be
            expressions.

               Note  that  not all addressing modes are valid with every in-
            struction,  refer to the processor specific  technical data for
            valid modes.

                PIC17CXXX CPU Type
                    PIC17C42,       PIC17C42A,      PIC17C43,       PIC17C44
                    PIC17C752,      PIC17C756,      PIC17C756A
                    PIC17C762,      PIC17C766,      PIC17CR42,
                    PIC17CR43

            BA.6  20-BIT ADDRESSING PIC

                 The  20-bit addressing family of PIC processors support the
            following assembler arguments:
                    (*)f(,a)
                    (*)f,(#)d(,(#)a)
                    (*)f,(#)s
                    (*)f,(#)b(,(#)a)
                    (*)fs,(*)fd
                    (#)t,(*)f
                    (#)t,(#)i,(*)f
                    {#}k
                    label(,(#)s)
                    ((#)s)
                    mm

                    where:  f       register file address
                            fs      register file source
                            fd      register file destination
                            a       ram access bit
                                            (0, -> ACCESS RAM)
                                            (1, -> RAM BANK)
                            d       destination select:
                                            (0, -> w), (1 -> f)
                                            the letters w or f may be used
                                            to select the destination
                            s       fast call/return mode:
                                            (0, -> SLOW), (1, -> FAST)
                            b       bit address of an 8-bit file register
                            mm      TBLRD and TBLWT suffixs
                                            ('*',  -> no change)
                                            ('*+', -> post-increment)
                                            ('*-', -> post-decrement)
                                            ('+*', -> pre-increment)
                            k       literal constant
                            label   label name

            ASPIC ASSEMBLER                                       PAGE BA-10
            20-BIT ADDRESSING PIC

                    Items enclosed in () are optional.

               The  terms  f, fs, fd, a, b, d, s, k, and  label  may all be
            expressions.

               Note  that  not all addressing modes are valid with every in-
            struction,  refer to the processor specific  technical data for
            valid modes.

                PIC18CXXX CPU Type
                    PIC18C242,      PIC18C252
                    PIC18C442,      PIC18C452
                    PIC18C658,      PIC18C858

            BA.7  PIC OPCODES

                 The  following  table contains all the mnemonics recognized
            by the ASPIC assembler.  The processors supporting each mnemonic
            are  indicated by the code 'PIC:12:14:16:20' after each instruc-
            tion type.  The designation [] refers to a  required  addressing
            mode argument.

                    addwf   []              PIC:12:14:16:20
                    addwfc  []              PIC:--:--:16:20
                    andwf   []              PIC:12:14:16:20
                    comf    []              PIC:12:14:16:20
                    decf    []              PIC:12:14:16:20
                    decfsz  []              PIC:12:14:16:20
                    dcfsnz  []              PIC:--:--:16:20
                    incf    []              PIC:12:14:16:20
                    incfsz  []              PIC:12:14:16:20
                    infsnz  []              PIC:--:--:16:20
                    iorwf   []              PIC:12:14:16:20
                    movf    []              PIC:12:14:--:20
                    negw    []              PIC:--:--:16:--
                    rlf     []              PIC:12:14:--:--
                    rlcf    []              PIC:--:--:16:20
                    rlncf   []              PIC:--:--:16:20
                    rrf     []              PIC:12:14:--:--
                    rrcf    []              PIC:--:--:16:20
                    rrncf   []              PIC:--:--:16:20
                    subfwb  []              PIC:--:--:--:20
                    subwf   []              PIC:12:14:16:20
                    subwfb  []              PIC:--:--:16:20
                    swapf   []              PIC:12:14:16:20
                    xorwf   []              PIC:12:14:16:20

            ASPIC ASSEMBLER                                       PAGE BA-11
            PIC OPCODES

                    movfp   []              PIC:--:--:16:--
                    movpf   []              PIC:--:--:16:--

                    movlb   []              PIC:--:--:16:20
                    movlr   []              PIC:--:--:16:--

                    movff   []              PIC:--:--:--:20

                    lfsr    []              PIC:--:--:--:20

                    clrf    []              PIC:12:14:16:20
                    cpfseq  []              PIC:--:--:16:20
                    cpfsgt  []              PIC:--:--:16:20
                    cpfslt  []              PIC:--:--:16:20
                    movwf   []              PIC:12:14:16:20
                    mulwf   []              PIC:--:--:16:20
                    negf    []              PIC:--:--:--:20
                    setf    []              PIC:--:--:16:20
                    tstfsz  []              PIC:--:--:16:20

                    bcf     []              PIC:12:14:16:20
                    bsf     []              PIC:12:14:16:20
                    btfsc   []              PIC:12:14:16:20
                    btfss   []              PIC:12:14:16:20
                    btg     []              PIC:--:--:16:20

                    addlw   []              PIC:--:14:16:20
                    andlw   []              PIC:12:14:16:20
                    iorlw   []              PIC:12:14:16:20
                    movlw   []              PIC:12:14:16:20
                    mullw   []              PIC:--:--:16:20
                    retlw   []              PIC:12:14:16:20
                    sublw   []              PIC:--:14:16:20
                    xorlw   []              PIC:12:14:16:20

                    call    []              PIC:12:14:16:20
                    goto    []              PIC:12:14:16:20
                    lcall   []              PIC:--:--:16:--

                    bc      []              PIC:--:--:--:20
                    bn      []              PIC:--:--:--:20
                    bnc     []              PIC:--:--:--:20
                    bnn     []              PIC:--:--:--:20
                    bnov    []              PIC:--:--:--:20
                    bnc     []              PIC:--:--:--:20
                    bov     []              PIC:--:--:--:20
                    bz      []              PIC:--:--:--:20

                    bra     []              PIC:--:--:--:20
                    rcall   []              PIC:--:--:--:20

            ASPIC ASSEMBLER                                       PAGE BA-12
            PIC OPCODES

                    tablrd  []              PIC:--:--:16:--
                    tablwt  []              PIC:--:--:16:--
                    tlrd    []              PIC:--:--:16:--
                    tlwt    []              PIC:--:--:16:--
                    tblrd   []              PIC:--:--:--:20
                    tblwt   []              PIC:--:--:--:20

                    clrw    []              PIC:12:14:--:--
                    clrwdt                  PIC:12:14:16:20
                    daw                     PIC:--:--:16:20
                    nop                     PIC:12:14:16:20
                    option                  PIC:12:14:--:--
                    pop                     PIC:--:--:--:20
                    push                    PIC:--:--:--:20
                    retfie  []              PIC:--:14:16:20
                    return  []              PIC:--:14:16:20
                    sleep                   PIC:12:14:16:20

                    tris    []              PIC:12:14:--:--

                                       APPENDIX BB

                                     ASRAB ASSEMBLER

            BB.1  ACKNOWLEDGMENT

            Thanks to Ulrich Raich and Razaq Ijoduola for their contribution
            of the ASRAB cross assembler.

               Ulrich Raich and Razaq Ijoduola
               PS Division
               CERN
               CH-1211 Geneva-23
                    Ulrich Raich
                    Ulrich dot Raich at cern dot ch

            BB.2  PROCESSOR SPECIFIC DIRECTIVES

                 The ASRAB assembler is a port of the ASZ80 assembler.  This
            assembler can process Z80, HD64180 (Z180), and Rabbit  2000/3000
            (default)  code.   The  following  processor  specific assembler
            directives specify which processor to target when processing the
            input assembler files.

            ASRAB ASSEMBLER                                        PAGE BB-2
            PROCESSOR SPECIFIC DIRECTIVES

            BB.2.1  .r2k Directive

            Format:

                    .r2k

            The  .r2k  directive  enables processing of the Rabbit 2000/3000
            specific mnemonics.  Mnemonics not associated  with  the  Rabbit
            2000/3000 processor will be flagged with an 'o' error.  Address-
            ing modes not supported by the Rabbit 2000/3000 will be  flagged
            with  an 'a' error.  A synonym of .r2k is .r3k.  The default as-
            sembler mode is .r2k.

                 The  .r2k  directive  also  selects  the  Rabbit  2000/3000
            specific cycles count to be output.

            BB.2.2  .hd64 Directive

            Format:

                    .hd64

            The  .hd64  directive  enables  processing of the HD64180 (Z180)
            specific mnemonics not included  in  the  Z80  instruction  set.
            Rabbit  2000/3000  mnemonics encountered will be flagged with an
            'o' error.  Addressing modes not supported by the HD64180 (Z180)
            will be flagged with an 'a' error.  A synonym of .hd64 is .z180.

                 The  .hd64 directive also selects the HD64180/Z180 specific
            cycles count to be output.

            BB.2.3  .z80 Directive

            Format:

                    .z80

            The  .z80  directive  enables  processing  of  the  Z80 specific
            mnemonics.  HD64180 and Rabbit 2000/3000 specific mnemonics will
            be flagged with an 'o' error.  Addressing modes not supported by
            the z80 will be flagged with an 'a' error.

                 The  .z80  directive  also  selects the Z80 specific cycles
            count to be output.

            ASRAB ASSEMBLER                                        PAGE BB-3
            PROCESSOR SPECIFIC DIRECTIVES

            BB.2.4  The .__.CPU.  Variable

                 The  value of the pre-defined symbol '.__.CPU.' corresponds
            to the selected processor type.  The default value  is  0  which
            corresponds  to the default processor type.  The following table
            lists the processor types and associated values  for  the  ASRAB
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                     .r2k / .r3k                     0
                    .hd64 / .z180                    1
                        .z80                         2

                 The  variable '.__.CPU.' is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

                 The  assembler  .globl  directive may be used to change the
            variable type to global causing its definition to be  output  to
            the  .rel file.  The inclusion of the definition of the variable
            '.__.CPU.' might be a useful means of validating that seperately
            assembled  files have been compiled for the same processor type.
            The linker will report an error for variables with multiple  non
            equal definitions.

            ASRAB ASSEMBLER                                        PAGE BB-4
            PROCESSOR SPECIFIC DIRECTIVES

            BB.3  RABBIT 2000/3000 ADDRESSING AND INSTRUCTIONS

            BB.3.1  Instruction Symbols

            b       Bit select
                            (000 = bit 0, 001 = bit 1,
                             010 = bit 2, 011 = bit 3,
                             100 = bit 4, 101 = bit 5,
                             110 = bit 6, 111 = bit 7)
            cc      Condition code select
                            (00 = NZ, 01 = Z, 10 = NC, 11 = C)
            d       8-bit (signed) displacement.
                    Expressed in two\'s complement.
            dd      word register select-destination
                            (00 = BC, 01 = DE, 10 = HL, 11 = SP)
            dd'     word register select-alternate
                            (00 = BC', 01 = DE', 10 = HL')
            e       8-bit (signed) displacement added to PC.
            f       condition code select
                            (000 = NZ, 001 = Z, 010 = NC, 011 = C,
                             100 = LZ/NV, 101 = LO/V, 110 = P, 111 = M)
            m       the most significant bits(MSB) of a 16-bit constant
            mn      16-bit constant
            n       8-bit constant or the least significant bits(LSB)
                    of a 16-bit constant
            r, g    byte register select
                            (000 = B, 001 = C, 010 = D, 011 = E,
                             100 = H, 101 = L, 111 = A)
            ss      word register select-source
                            (00 = BC, 01 = DE, 10 = HL, 11 = SP)
            v       Restart address select
                            (010 = 0020h, 011 = 0030h, 100 = 0040h,
                             101 = 0050h, 111 = 0070h)
            x       an 8-bit constant to load into the XPC
            xx      word register select
                            (00 = BC, 01 = DE, 10 = IX, 11 = SP)
            yy      word register select
                            (00 = BC, 01 = DE, 10 = IY, 11 = SP)
            zz      word register select
                            (00 = BC, 01 = DE, 10 = HL, 11 = AF)

            ASRAB ASSEMBLER                                        PAGE BB-5
            RABBIT 2000/3000 ADDRESSING AND INSTRUCTIONS

                    C  -    carry bit set
                    M  -    sign bit set
                    NC -    carry bit clear
                    NZ -    zero bit clear
                    P  -    sign bit clear
                    PE -    parity even
                    V  -    overflow bit set
                    PO -    parity odd
                    NV -    overflow bit clear
                    Z  -    zero bit set

            The  terms  m, mn, n, and x may all be expressions.  The terms b
            and v are not allowed to be external references.

            ASRAB ASSEMBLER                                        PAGE BB-6
            RABBIT 2000/3000 ADDRESSING AND INSTRUCTIONS

            BB.3.2  Rabbit Instructions

                 The  following list of instructions (with explicit address-
            ing modes) are available in the Rabbit 2000/3000 assembler mode.
            Those instructions denoted by an asterisk (*) are additional in-
            structions not available in the HD64180 or Z80 assembler mode.

             ADC A,n                 DEC IX                  LD A,EIR
             ADC A,r                 DEC IY                  LD A,IIR
             ADC A,(HL)              DEC r                  *LD A,XPC
             ADC A,(IX+d)            DEC ss                  LD A,(BC)
             ADC A,(IY+d)            DEC (HL)                LD A,(DE)
             ADC HL,ss               DEC (IX+d)              LD A,(mn)
             ADD A,n                 DEC (IY+d)             *LD dd,BC
             ADD A,r                 DJNZ e                 *LD dd,DE
             ADD A,(HL)                                      LD dd,mn
             ADD A,(IX+d)            EX AF,AF                LD dd,(mn)
             ADD A,(IY+d)            EX DE,HL                LD EIR,A
             ADD HL,ss               EX DE,HL               *LD HL,IX
             ADD IX,xx               EX (SP),HL             *LD HL,IY
             ADD IY,yy               EX (SP),IX             *LD HL,(HL+d)
            *ADD SP,d                EX (SP),IY             *LD HL,(IX+d)
            *ALTD                    EXX                    *LD HL,(IY+d)
            *AND HL,DE                                       LD HL,(mn)
            *AND IX,DE               INC IX                 *LD HL,(SP+n)
            *AND IY,DE               INC IY                  LD IIR,A
             AND n                   INC r                  *LD IX,HL
             AND r                   INC ss                  LD IX,mn
             AND (HL)                INC (HL)                LD IX,(mn)
             AND (IX+d)              INC (IX+d)             *LD IX,(SP+n)
             AND (IY+d)              INC (IY+d)             *LD IY,HL
                                    *IOE                     LD IY,mn
             BIT b,r                *IOI                     LD IY,(mn)
             BIT b,(HL)             *IPRES                  *LD IY,(SP+n)
             BIT b,(IX+d)           *IPSET 0                 LD r,g
             BIT b,(IY+d)           *IPSET 1                 LD r,n
            *BOOL HL                *IPSET 2                 LD r,(HL)
            *BOOL IX                *IPSET 3                 LD r,(IX+d)
            *BOOL IY                                         LD r,(IY+d)
                                     JP f,mn                 LD SP,HL
             CALL mn                 JP mn                   LD SP,IX
             CCF                     JP (HL)                 LD SP,IY
             CP n                    JP (IX)                *LD XPC,A
             CP r                    JP (IY)                 LD (BC),A
             CP (HL)                 JR cc,e                 LD (DE),A
             CP (IX+d)               JR e                    LD (HL),n
             CP (IY+d)                                       LD (HL),r
             CPL                    *LCALL x,mn

            ASRAB ASSEMBLER                                        PAGE BB-7
            RABBIT 2000/3000 ADDRESSING AND INSTRUCTIONS

            *LD (HL+d),HL           *POP IP                  SBC A,n
            *LD (IX+d),HL            POP IX                  SBC A,r
             LD (IX+d),n             POP IY                  SBC A,(HL)
             LD (IX+d),r             POP zz                  SBC HL,ss
            *LD (IY+d),HL           *PUSH IP                 SBC (IX+d)
             LD (IY+d),n             PUSH IX                 SBC (IY+d)
             LD (IY+d),r             PUSH IY                 SCF
             LD (mn),A               PUSH zz                 SET b,r
             LD (mn),HL                                      SET b,(HL)
             LD (mn),IX              RA                      SET b,(IX+d)
             LD (mn),IY              RES b,r                 SET b,(IY+d)
             LD (mn),ss              RES b,(HL)              SLA r
            *LD (SP+n),HL            RES b,(IX+d)            SLA (HL)
            *LD (SP+n),IX            RES b,(IY+d)            SLA (IX+d)
            *LD (SP+n),IY            RET                     SLA (IY+d)
             LDD                     RET f                   SRA r
             LDDR                   *RETI                    SRA (HL)
             LDI                    *RL DE                   SRA (IX+d)
             LDIR                    RL r                    SRA (IY+d)
            *LDP HL,(HL)             RL (HL)                 SRL r
            *LDP HL,(IX)             RL (IX+d)               SRL (HL)
            *LDP HL,(IY)             RL (IY+d)               SRL (IX+d)
            *LDP HL,(mn)             RLA                     SRL (IY+d)
            *LDP IX,(mn)             RLC r                   SUB n
            *LDP IY,(mn)             RLC (HL)                SUB r
            *LDP (HL),HL             RLC (IX+d)              SUB (HL)
            *LDP (IX),HL             RLC (IY+d)              SUB (IX+d)
            *LDP (IY),HL             RLCA                    SUB (IY+d)
            *LDP (mn),HL            *RR DE
            *LDP (mn),IX            *RR HL                   XOR n
            *LDP (mn),IY            *RR IX                   XOR r
             LJP x,mn               *RR IY                   XOR (HL)
             LRET                    RR r                    XOR (IX+d)
                                     RR (HL)                 XOR (IY+d)
            *MUL                     RR (IX+d)
                                     RR (IY+d)
             NEG                     RRC r
             NOP                     RRC (HL)
                                     RRC (IX+d)
            *OR HL,DE                RRC (IY+d)
            *OR IX,DE                RRCA
            *OR IY,DE                RST v
             OR n
             OR r
             OR (HL)
             OR (IX+d)
             OR (IY+d)

            ASRAB ASSEMBLER                                        PAGE BB-8
            Z80/HD64180 ADDRESSING AND INSTRUCTIONS

            BB.4  Z80/HD64180 ADDRESSING AND INSTRUCTIONS

            The following list specifies the format for each Z80/HD64180 ad-
            dressing mode supported by ASZ80:

                    #data           immediate data
                                    byte or word data

                    n               byte value

                    rg              a byte register
                                    a,b,c,d,e,h,l

                    rp              a register pair
                                    bc,de,hl

                    (hl)            implied addressing or
                                    register indirect addressing

                    (label)         direct addressing

                    (ix+offset)     indexed addressing with
                     offset(ix)     an offset

                    label           call/jmp/jr label

            The  terms  data,  n, label, and offset, may all be expressions.
            The terms dir and offset are not allowed to be  external  refer-
            ences.

                 The  following tables list all Z80/HD64180 mnemonics recog-
            nized by the ASRAB assembler.  The designation []  refers  to  a
            required addressing mode argument.  Note that not all addressing
            modes are valid with every instruction, refer to the Z80/HD64180
            technical data for valid modes.

            ASRAB ASSEMBLER                                        PAGE BB-9
            Z80/HD64180 ADDRESSING AND INSTRUCTIONS

            BB.4.1  Inherent Instructions

                    ccf             cpd
                    cpdr            cpi
                    cpir            cpl
                    daa             di
                    ei              exx
                    halt            neg
                    nop             reti
                    retn            rla
                    rlca            rld
                    rra             rrca
                    rrd             scf

            BB.4.2  Implicit Operand Instructions

                    adc     a,[]            adc     []
                    add     a,[]            add     []
                    and     a,[]            and     []
                    cp      a,[]            cp      []
                    dec     a,[]            dec     []
                    inc     a,[]            inc     []
                    or      a,[]            or      []
                    rl      a,[]            rl      []
                    rlc     a,[]            rlc     []
                    rr      a,[]            rr      []
                    rrc     a,[]            rrc     []
                    sbc     a,[]            sbc     []
                    sla     a,[]            sla     []
                    sra     a,[]            sra     []
                    srl     a,[]            srl     []
                    sub     a,[]            sub     []
                    xor     a,[]            xor     []

            ASRAB ASSEMBLER                                       PAGE BB-10
            Z80/HD64180 ADDRESSING AND INSTRUCTIONS

            BB.4.3  Load Instruction

                    ld      rg,[]           ld      [],rg
                    ld      (bc),a          ld      a,(bc)
                    ld      (de),a          ld      a,(de)
                    ld      (label),a       ld      a,(label)
                    ld      (label),rp      ld      rp,(label)
                    ld      i,a             ld      r,a
                    ld      a,i             ld      a,r
                    ld      sp,hl           ld      sp,ix
                    ld      sp,iy           ld      rp,#data
                    ldd                     lddr
                    ldi                     ldir

            BB.4.4  Call/Return Instructions

                    call    C,label         ret     C
                    call    M,label         ret     M
                    call    NC,label        ret     NC
                    call    NZ,label        ret     NZ
                    call    P,label         ret     P
                    call    PE,label        ret     PE
                    call    PO,label        ret     PO
                    call    Z,label         ret     Z
                    call    label           ret

            BB.4.5  Jump and Jump to Subroutine Instructions

                    jp      C,label         jp      M,label
                    jp      NC,label        jp      NZ,label
                    jp      P,label         jp      PE,label
                    jp      PO,label        jp      Z,label
                    jp      (hl)            jp      (ix)
                    jp      (iy)            jp      label
                    djnz    label
                    jr      C,label         jr      NC,label
                    jr      NZ,label        jr      Z,label
                    jr      label

            ASRAB ASSEMBLER                                       PAGE BB-11
            Z80/HD64180 ADDRESSING AND INSTRUCTIONS

            BB.4.6  Bit Manipulation Instructions

                    bit     n,[]
                    res     n,[]
                    set     n,[]

            BB.4.7  Interrupt Mode and Reset Instructions

                    im      n
                    im      n
                    im      n
                    rst     n

            BB.4.8  Input and Output Instructions

                    in      a,(n)           in      rg,(c)
                    ind                     indr
                    ini                     inir
                    out     (n),a           out     (c),rg
                    outd                    otdr
                    outi                    otir

            BB.4.9  Register Pair Instructions

                    add     hl,rp           add     ix,rp
                    add     iy,rp
                    adc     hl,rp           sbc     hl,rp
                    ex      (sp),hl         ex      (sp),ix
                    ex      (sp),iy
                    ex      de,hl
                    ex      af,af'
                    push    rp              pop     rp

            ASRAB ASSEMBLER                                       PAGE BB-12
            Z80/HD64180 ADDRESSING AND INSTRUCTIONS

            BB.4.10  HD64180 Specific Instructions

                    in0     rg,(n)
                    out0    (n),rg
                    otdm                    otdmr
                    otim                    otimr
                    mlt     bc              mlt     de
                    mlt     hl              mlt     sp
                    slp
                    tst     a
                    tstio   #data

                                       APPENDIX BC

                                    ASSCMP ASSEMBLER

            BC.1  SC/MP REGISTER SET

            The following is a list of the SC/MP registers used by ASSCMP:

                    p0,pc      -    16-bit program counter
                    p1,p2,p3   -    16-bit pointer registers

            BC.2  SC/MP ADDRESSING MODES

                 The  general addressing modes are normally described in the
            form @DISP(X) which correspond to these specific modes:

                DISP        a PC relative address
                DISP(X)     a DISPlacement from a pointer register
                @DISP(X)    An auto-increment DISPlacement from a
                            pointer register

                 The ASSCMP assembler also allows the ( and ) designators to
            be replaced by the [ and ] designators.

                 The  ASSCMP  assembler  also allows several shorthand nota-
            tions for the addressing modes as shown here:

                (X)         ==>>    0(X)
                @(X)        ==>>    @0(X)
                @DISP       ==>>    @DISP(PC)

                 The  xpal,  xpah,  and  xppc  instructions  require  only a
            pointer register - p0, p1, p2, p3, or pc.

            ASSCMP ASSEMBLER                                       PAGE BC-2
            SC/MP ADDRESSING MODES

                 The  standard  memory reference instructions:  ld, and, or,
            xor, dad, add, and cad also allow an  alternate  immediate  mode
            instruction using the following format:

                ld  #DATA

                 The  #  is  required otherwise DATA will be treated as a PC
            relative address.

                 The  immediate mode instructions:  ldi, ani, ori, xri, dai,
            adi, and cai allow either of these forms:

                ldi #DATA
                ldi DATA

            BC.3  SC/MP INSTRUCTION SET

                 The following tables list all SC/MP mnemonics recognized by
            the ASSCMP assembler.

            BC.3.1  Memory Reference Instructions

                    ld      @DISP(X) / #data        Load
                    st      @DISP(X) -------        Store
                    and     @DISP(X) / #data        AND
                    or      @DISP(X) / #data        OR
                    xor     @DISP(X) / #data        Exclusive OR
                    dad     @DISP(X) / #data        Decimal Add
                    add     @DISP(X) / #data        Add
                    cad     @DISP(X) / #data        Complement and Add

            BC.3.2  Immediate Instructions

                    ldi     #data / data    Load Immediate
                    ld      #data
                    ani     #data / data    AND Immediate
                    and     #data
                    ori     #data / data    Or Immediate
                    or      #data
                    xri     #data / data    Exclusive Or Immediate
                    xor     #data
                    dai     #data / data    Decimal Add Immediate
                    dad     #data
                    adi     #data / data    Add Immediate
                    add     #data
                    cai     #data / data    Complement and Add Immediate
                    cad     #data

            ASSCMP ASSEMBLER                                       PAGE BC-3
            SC/MP INSTRUCTION SET

            BC.3.3  Extension Register Instructions

                    lde             Load AC from Extension
                    xae             Exchange AC and Extension
                    ane             AND Extension
                    ore             OR Extension
                    xre             Exclusive Or Extension
                    dae             Decimal Add Extension
                    ade             Add Extension
                    cae             Complement and Add Extension

            BC.3.4  Memory Increment/Decrement Instructions

                    dld     DISP(X)         Increment and Load
                    ild     DISP(X)         Decrement  aand Load

            BC.3.5  Transfer Instructions

                    jmp     DISP(X)         Jump
                    jp      DISP(X)         Jump if Positive
                    jz      DISP(X)         Jump if Zero
                    jnz     DISP(X)         Jump if Not Zero

            BC.3.6  Pointer Register Move Instructions

                    xpal    X               Exchange Pointer Low
                    xpah    X               Exchange Pointer High
                    xppc    X               Exchange Pointer with PC

            BC.3.7  Shift, Rotate, Serial I/O Instructions

                    sio             Serial Input/Output
                    sr              Shift Right
                    srl             Shift Right with Link
                    rr              Rotate Right
                    rrl             Rotate Right with Link

            ASSCMP ASSEMBLER                                       PAGE BC-4
            SC/MP INSTRUCTION SET

            BC.3.8  Single-Byte Miscellaneous Instructions

                    halt            Halt
                    ccl             Clear Carry Link
                    scl             Set Carry Link
                    dint            Disable Interrupt
                    ien             Enable Interrupt
                    csa             Copy Status to AC
                    cas             Copy AC to Status
                    nop             No Operation

            BC.3.9  Double-Byte Miscellaneous Instruction

                    dly     #data / data    Delay

                                       APPENDIX BD

                                     ASZ8 ASSEMBLER

            BD.1  Z8 REGISTER SET

            The following is a list of the Z8 registers used by ASZ8:

                    r0  ... r15     -        8-bit accumulators
                    rr0 ... rr15    -       16-bit accumulators

            BD.2  Z8 INSTRUCTION SET

                 The  following  tables  list all Z8 mnemonics recognized by
            the ASZ8 assembler.  The designation [] refers to a required ad-
            dressing mode argument.  The following list specifies the format
            for each addressing mode supported by ASZ8:

                    #data           immediate byte data

                    addr            location/branch address

                    r0  ... r15      8-bit registers

                    rr0 ... rr15    16-bit registers

                    @rn     or      register indirect addressing
                    (rn)

                    @rrn    or      register indirect addressing
                    (rrn)

                    @addr   or      indirect addressing
                    (addr)

                    offset(rn)      indexed register addressing

            The terms data, addr, and offset may all be expressions.

            ASZ8 ASSEMBLER                                         PAGE BD-2
            Z8 INSTRUCTION SET

            The  designation  CC  refers  to a condition code argument.  The
            following table contains all the valid condition codes supported
            by ASZ8:

                    f       Always False            -
                    t       Always True             -
                    c       Carry                   C=1
                    nc      No Carry                C=0
                    z       Zero                    Z=1
                    nz      Non-Zero                Z=0
                    pl      Plus                    S=0
                    mi      Minus                   S=1
                    ov      Overflow                V=1
                    nov     No Overflow             V=0
                    eq      Equal                   Z=1
                    ne      Not Equal               Z=0
                    ge      Greater Than or Equal   (S XOR V)=0
                    lt      Less Than               (S XOR V)=1
                    gt      Greater Than            (Z OR (S XOR V))=0
                    le      Less Than or Equal      (Z OR (S XOR V))=1
                    uge     Unsigned ge             C=0
                    ult     Unsigned lt             C=1
                    ugt     Unsigned gt             (C=0 AND Z=0)=1
                    ule     Unsigned le             (C OR Z)=1

            Note that not all addressing modes are valid with every instruc-
            tion, refer to the Z8 technical data for valid modes.

            BD.2.1  Load Instructions

                    clr     []
                    ld      [],[]           ldc     [],[]
                    pop     []              push    []

            BD.2.2  Arithmetic Instructions

                    adc     [],[]           add     [],[]
                    cp      [],[]           da      []
                    dec     []              decw    []
                    inc     []              incw    []
                    sbc     [],[]           sub     [],[]

            ASZ8 ASSEMBLER                                         PAGE BD-3
            Z8 INSTRUCTION SET

            BD.2.3  Logical Instructions

                    and     [],[]           com     []
                    or      [],[]           xor     [],[]

            BD.2.4  Program Control Instructions

                    call    []              djnz    [],[]
                    iret                    jp      CC,[]
                    jr      CC,[]           ret

            BD.2.5  Bit Manipulation Instructions

                    tcm     [],[]           tm      [],[]
                    and     [],[]           or      [],[]
                    xor     [],[]

            BD.2.6  Block Transfer Instructions

                    ldci    [],[]

            BD.2.7  Rotate and Shift Instructions

                    rl      []              rlc     []
                    rr      []              rrc     []
                    sra     []              swap    []

            BD.2.8  Cpu Control Instructions

                    ccf
                    di                      ei
                    halt                    nop
                    rcf                     scf
                    srp     []
                    stop                    wait

                                       APPENDIX BE

                                     ASZ80 ASSEMBLER

            BE.1  .z80 DIRECTIVE

            Format:

                    .z80

            The  .z80  directive enables processing of only the z80 specific
            mnemonics.  HD64180/Z180 mnemonics encountered without the .hd64
            directive will be flagged with an 'o' error.

                 The  .z80  directive  also  selects the Z80 specific cycles
            count to be output.

            BE.2  .hd64 DIRECTIVE

            Format:

                    .hd64

            The  .hd64  directive  enables  processing  of  the HD64180/Z180
            specific mnemonics not included  in  the  Z80  instruction  set.
            HD64180/Z180  mnemonics  encountered without the .hd64 directive
            will be flagged with an 'o' error.  A synonym of .hd64 is .z180.

                 The  .hd64 directive also selects the HD64180/Z180 specific
            cycles count to be output.

            ASZ80 ASSEMBLER                                        PAGE BE-2
            THE .__.CPU.  VARIABLE

            BE.3  THE .__.CPU.  VARIABLE

                 The  value of the pre-defined symbol '.__.CPU.' corresponds
            to the selected processor type.  The default value  is  0  which
            corresponds  to the default processor type.  The following table
            lists the processor types and associated values  for  the  ASZ80
            assembler:

                    Processor Type            .__.CPU. Value
                    --------------            --------------
                        .z80                         0
                    .hd64 / .z180                    1

                 The  variable '.__.CPU.' is by default defined as local and
            will not be output to the created .rel file.  The assembler com-
            mand line options -g or -a will not cause the local symbol to be
            output to the created .rel file.

                 The  assembler  .globl  directive may be used to change the
            the variable type to global causing its definition to be  output
            to  the .rel file.  The inclusion of the definition of the vari-
            able '.__.CPU.' might be  a  useful  means  of  validating  that
            seperately  assembled files have been compiled for the same pro-
            cessor type.  The linker will report an error for variables with
            multiple non equal definitions.

            BE.4  Z80 REGISTER SET AND CONDITIONS

                 The  following  is a complete list of register designations
            and condition mnemonics:

                    byte registers  -       a,b,c,d,e,h,l,i,r
                    register pairs  -       af,af',bc,de,hl
                    word registers  -       pc,sp,ix,iy

                    C -     carry bit set
                    M -     sign bit set
                    NC -    carry bit clear
                    NZ -    zero bit clear
                    P -     sign bit clear
                    PE -    parity even
                    PO -    parity odd
                    Z -     zero bit set

            ASZ80 ASSEMBLER                                        PAGE BE-3
            Z80 INSTRUCTION SET

            BE.5  Z80 INSTRUCTION SET

                 The following list specifies the format for each addressing
            mode supported by ASZ80:

                    #data           immediate data
                                    byte or word data

                    n               byte value

                    rg              a byte register
                                    a,b,c,d,e,h,l

                    rp              a register pair
                                    bc,de,hl

                    (hl)            implied addressing or
                                    register indirect addressing

                    (label)         direct addressing

                    offset(ix)      indexed addressing with
                                    an offset

                    label           call/jmp/jr label

            The terms data, n, label, and offset may all be expressions.

                 Note that not all addressing modes are valid with every in-
            struction, refer to  the  Z80/HD64180/Z180  technical  data  for
            valid modes.

                 The  following  tables  list all Z80/HD64180/Z180 mnemonics
            recognized by the ASZ80 assembler.  The designation [] refers to
            a required addressing mode argument.

            ASZ80 ASSEMBLER                                        PAGE BE-4
            Z80 INSTRUCTION SET

            BE.5.1  Inherent Instructions

                    ccf             cpd
                    cpdr            cpi
                    cpir            cpl
                    daa             di
                    ei              exx
                    halt            neg
                    nop             reti
                    retn            rla
                    rlca            rld
                    rra             rrca
                    rrd             scf

            BE.5.2  Implicit Operand Instructions

                    adc     a,[]            adc     []
                    add     a,[]            add     []
                    and     a,[]            and     []
                    cp      a,[]            cp      []
                    dec     a,[]            dec     []
                    inc     a,[]            inc     []
                    or      a,[]            or      []
                    rl      a,[]            rl      []
                    rlc     a,[]            rlc     []
                    rr      a,[]            rr      []
                    rrc     a,[]            rrc     []
                    sbc     a,[]            sbc     []
                    sla     a,[]            sla     []
                    sra     a,[]            sra     []
                    srl     a,[]            srl     []
                    sub     a,[]            sub     []
                    xor     a,[]            xor     []

            ASZ80 ASSEMBLER                                        PAGE BE-5
            Z80 INSTRUCTION SET

            BE.5.3  Load Instruction

                    ld      rg,[]           ld      [],rg
                    ld      (bc),a          ld      a,(bc)
                    ld      (de),a          ld      a,(de)
                    ld      (label),a       ld      a,(label)
                    ld      (label),rp      ld      rp,(label)
                    ld      i,a             ld      r,a
                    ld      a,i             ld      a,r
                    ld      sp,hl           ld      sp,ix
                    ld      sp,iy           ld      rp,#data

                    ldd                     lddr
                    ldi                     ldir

            BE.5.4  Call/Return Instructions

                    call    C,label         ret     C
                    call    M,label         ret     M
                    call    NC,label        ret     NC
                    call    NZ,label        ret     NZ
                    call    P,label         ret     P
                    call    PE,label        ret     PE
                    call    PO,label        ret     PO
                    call    Z,label         ret     Z
                    call    label           ret

            BE.5.5  Jump and Jump to Subroutine Instructions

                    jp      C,label         jp      M,label
                    jp      NC,label        jp      NZ,label
                    jp      P,label         jp      PE,label
                    jp      PO,label        jp      Z,label

                    jp      (hl)            jp      (ix)
                    jp      (iy)            jp      label

                    djnz    label

                    jr      C,label         jr      NC,label
                    jr      NZ,label        jr      Z,label
                    jr      label

            ASZ80 ASSEMBLER                                        PAGE BE-6
            Z80 INSTRUCTION SET

            BE.5.6  Bit Manipulation Instructions

                    bit     n,[]
                    res     n,[]
                    set     n,[]

            BE.5.7  Interrupt Mode and Reset Instructions

                    im      n
                    im      n
                    im      n
                    rst     n

            BE.5.8  Input and Output Instructions

                    in      a,(n)           in      rg,(c)
                    ind                     indr
                    ini                     inir

                    out     (n),a           out     (c),rg
                    outd                    otdr
                    outi                    otir

            BE.5.9  Register Pair Instructions

                    add     hl,rp           add     ix,rp
                    add     iy,rp

                    adc     hl,rp           sbc     hl,rp

                    ex      (sp),hl         ex      (sp),ix
                    ex      (sp),iy
                    ex      de,hl
                    ex      af,af'

                    push    rp              pop     rp

            ASZ80 ASSEMBLER                                        PAGE BE-7
            Z80 INSTRUCTION SET

            BE.5.10  HD64180/Z180 Specific Instructions

                    in0     rg,(n)
                    out0    (n),rg

                    otdm                    otdmr
                    otim                    otimr

                    mlt     bc              mlt     de
                    mlt     hl              mlt     sp

                    slp

                    tst     a
                    tstio   #data

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Last Updated: April 2009