A pseudo Assembler in Action!#

General Information
Author: Allan D. Doum
Language: Action!
Compiler/Interpreter: Action!
Published: The Software Cellar

PDF: assem_doc.PDF

; ASSEM.ACT - ACTION! pseudo-assembler
;    NOT copyrighted at any time
;
;         Programmed by
;         Allen D. Doum           
;        Downloaded from  
;       THE SOFTWARE CELLAR
;          (714) 772-9671 
;
; compiler must be CASE SENSITVE to use

;assembler commands

DEFINE CODE="[",ENDC="]"

;single byte instructions 

DEFINE Brk="$00",
       Clc="$18",Cld="$D8",Cli="$58",
       Clv="$B8",Dex="$CA",Dey="$88",
       Inx="$E8",Iny="$C8",Nop="$EA",
       Pha="$48",Php="$08",Pla="$68",
       Plp="$28",Rti="$40",Rts="$60",
       Sec="$38",Sed="$E8",Sei="$78",
       Tax="$AA",Tay="$A8",Tsx="$BA",
       Txa="$8A",Txs="$9A",Tya="$98"

;single mode only instructions

DEFINE Bcc="$90",Bcs="$B0",Beq="$F0",
       Bmi="$30",Bne="$D0",Bpl="$10",
       Bvc="$50",Bvs="$70",Jsr="$20"

;other instructions require addressing modes (below)

DEFINE Adc="$61+",And="$21+",Asl="$02+",
       Bit="$20+",Cmp="$C1+",Cpx="$E0+",
       Cpy="$C0+",Dec="$C2+",Eor="$41+",
       Inc="$E2+",Jmp="$40+",Lda="$A1+",
       Ldx="$A2+",Ldy="$A0+",Lsr="$42+",
       Ora="$01+",Rol="$22+",Ror="$62+",
       Sbc="$E1+",Sta="$81+",Stx="$82+",
       Sty="$80+"

;mode operations - use following above 

DEFINE PZ ="$04", ;page zero
       PZi="$14", ;page zero indexed
       PZx="$14", ;page zero index X
       PZy="$14", ;page zero index Y
       IN ="$2C", ;indirect
       INx="$00", ;X indirect
       INy="$10", ;Y indirect
       AB ="$0C", ;absolute
       ABx="$1C", ;absolute X
       ABy="$18", ;absolute Y (expt LDX)
       ABi="$1C", ;Ldx absolute Y
       AC ="$08", ;accumutator
       IM ="$08", ;immediate (expt below)
       IMi="$00"  ;immediate (Ldy,Ldx,Cpy,Cpx)