ftp.barnyard.co.uk/2015.02.ftp.barnyard.co.uk.tar/ftp.barnyard.co.uk/cpm/walnut-creek-CDROM/ENTERPRS/CPM/UTILS/A/BIOSR4.ARC/X6502.LIB

Text File | 1987-04-26 | 5KB | 408 lines

    ; This macro library is to be used with DRI's MAC or RMAC
    ;   (MAC and RMAC are registered trademarks of Digital Research)
    ;
    ; The code structure is the same as normal 6502 asmabler
    ; with the following differences:
    ;
    ;   Hex numbers '$00' are replaced with a number followed by an h
    ;   i.e. normal 8080 type numbers  (also have binary, and octal)
    ;
    ;   The immediate instruction's format is different. Below is an
    ;   example:
    ;        normal 6502 ASM        LIB 6502 ASM

    ;        lda    #$A5        lda     0A5h,#
    ;


    ; Written by    Von Ertwine
    ; 26 July 84
    ;

xaaa    macro    @W,@Y,@Z
     if    nul @Z
      if    @Y<256
       db    @W+4,@Y
      else
       db    @W+12
       dw    @Y
      endif
     else
      if    '&@Z'='X)'
       db    @W,@Y&)
      else
       if    '&@Z'='X'
        if    @Y<256
         db    @W+20,@Y
        else
         db    @W+28
         dw    @Y
        endif
       else
        if    '&@Z'='Y'
         @A    set 0
         irpc    @x,@y
          if    '&@X'='('
           @A    set 1
          endif
         endm
         if    @A=1
          db    @W+16,@Y
         else
          db    @W+24
          dw    @Y
         endif
        else
         if    '&@Z'='#'
          if    @Y<256
           db    @W+8,@Y
          else
           db    @W,0,0
           'Error'
          endif
         endif
        endif
       endif
      endif
     endif
    endm

xbb    macro    @W,@Y,@Z
     @A    set 0
     if    not nul @Z
      @A    set 16
      if    (@W=86h) or (@W=84h)
       if    @Y>256
        'Error'
       endif
      endif
     endif
     if    @Y<256
      db    @W+@A,@Y
     else
      db    @W+@A+8
      dw    @Y
     endif
    endm

xbbb    macro    @W,@Y,@Z
     if    NUL @Z
      @A    set    0
      irpc    @X,@Y
       @A    set @A+1
      endm
      if    @A=1
       if    '&@Y'='A'
        db    @W+8
       else
        if    @Y<256
         db    @W+4,@Y
        else
         db    @W+12
         dw    @Y
        endif
       endif
      else
       if    @Y<256
        db    @W+4,@Y
       else
        db    @W+12
        dw    @Y
       endif
      endif
     else
      if    @Y<256
       db    @W+20,@Y
      else
       db    @W+28
       dw    @Y
      endif
     endif
    endm

xcc    macro    @W,@Y,@Z
     if    NUL @Z
      if    @Y<256
       db    @W+4,@Y
      else
       db    @W+12
       dw    @Y
      endif
     else
      if '&@Z'='#'
       db    @W,@Y
      else
       'Error'
      endif
     endif
    endm

xddd    macro    @W,@Y,@Z
     if    NUL @Z
      if    @Y<256
       db    @W+4,@Y
      else
       db    @W+12
       dw    @Y
      endif
     else
      if    '&@Z'='#'
       db    @W,@Y
      else
       if    @Y<256
        db    @W+20,@Y
       else
        db    @W+28
        dw    @Y
       endif
      endif
     endif
    endm



@adc    macro    @u,@v
    xaaa    61h,@u,@v
    endm

@and    macro    @u,@v
    xaaa    21h,@u,@v
    endm

@asl    macro    @u,@v
    xbbb    2,@u,@v
    endm

@bcc    macro    @u
    db    90h,@u-$-1
    endm

@bcs    macro    @u
    db    0b0h,@u-$-1
    endm

@beq    macro    @u
    db    0f0h,@u-$-1
    endm

@bit    macro    @u
     if    @u<256
      db    24h,@u
     else
      db    2ch
      dw    @u
     endif
    endm

@bmi    macro    @u
    db    30h,@u-$-1
    endm

@bne    macro    @u
    db    0d0h,@u-$-1
    endm

@bpl    macro    @u
    db    10h,@u-$-1
    endm

@brk    macro
    db    00h
    endm

@bvc    macro    @u
    db    50h,@u-$-1
    endm

@bvs    macro    @u
    db    70h,@u-$-1
    endm

@clc    macro
    db    018h
    endm

@cld    macro
    db    0d8h
    endm

@cli    macro
    db    058h
    endm

@clv    macro
    db    0b8h
    endm

@cmp    macro    @u,@v
    xaaa    0c1h,@u,@v
    endm

@cpx    macro    @u,@v
    xcc    0e0h,@u,@v
    endm

@cpy    macro    @u,@v
    xcc    0c0h,@u,@v
    endm

@dec    macro    @u,@v
    xbb    0c6h,@u,@v
    endm

@dex    macro
    db    0cah
    endm

@dey    macro
    db    088h
    endm

@eor    macro    @u,@v
    xaaa    41h,@u,@v
    endm

@inc    macro    @u,@v
    xbb    0e6h,@u,@v
    endm

@inx    macro
    db    0e8h
    endm

@iny    macro
    db    0c8h
    endm

@jmp    macro    @u
    @A    set 0
     irpc    @X,@u
      if    '&@X'='('
       @A    set 20h
      endif
     endm
    db    4ch+@A
    dw    @U
    endm

@jsr    macro    @u
    db    20h
    dw    @u
    endm

@lda    macro    @u,@v
    xaaa    0a1h,@u,@v
    endm

@ldx    macro    @u,@v
    xddd    0a2h,@u,@v
    endm

@ldy    macro    @u,@v
    xddd    0a0h,@u,@v
    endm

@lsr    macro    @u,@v
    xbbb    42h,@u,@v
    endm

@nop    macro
    db    0eah
    endm

@ora    macro    @u,@v
    xaaa    1,@u,@v
    endm

@pha    macro
    db    048h
    endm

@php    macro
    db    008h
    endm

@pla    macro
    db    068h
    endm

@plp    macro
    db    028h
    endm

@rol    macro    @u,@v
    xbbb    22h,@u,@v
    endm

@ror    macro    @u,@v
    xbbb    62h,@u,@v
    endm

@rti    macro
    db    040h
    endm

@rts    macro
    db    060h
    endm

@sbc    macro    @u,@v
    xaaa    0e1h,@u,@v
    endm

@sec    macro
    db    038h
    endm

@sed    macro
    db    0f8h
    endm

@sei    macro
    db    078h
    endm

@sta    macro    @u,@v
    xaaa    81h,@u,@v
    endm

@stx    macro    @u,@v
    xbb    86h,@u,@v
    endm

@sty    macro    @u,@v
    xbb    84h,@u,@v
    endm

@tax    macro
    db    0aah
    endm

@tay    macro
    db    0a8h
    endm

@tsx    macro
    db    0bah
    endm

@txa    macro
    db    08ah
    endm

@txs    macro
    db    09ah
    endm

@tya    macro
    db    098h
    endm

@skip1    macro
    db    024h
    endm

@skip2    macro
    db    02ch
    endm