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PLASMA/src/vmsrc/plvm02.s
David Schmenk efe08f8ea7 Save a couple bytes and sync label names
2018-02-17 10:34:09 -08:00

1893 lines
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ArmAsm
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;**********************************************************
;*
;* APPLE ][ 64K/128K PLASMA INTERPRETER
;*
;* SYSTEM ROUTINES AND LOCATIONS
;*
;**********************************************************
!CPU 65C02
;*
;* MONITOR SPECIAL LOCATIONS
;*
CSWL = $36
CSWH = $37
PROMPT = $33
;*
;* PRODOS
;*
PRODOS = $BF00
DEVCNT = $BF31 ; GLOBAL PAGE DEVICE COUNT
DEVLST = $BF32 ; GLOBAL PAGE DEVICE LIST
MACHID = $BF98 ; GLOBAL PAGE MACHINE ID BYTE
RAMSLOT = $BF26 ; SLOT 3, DRIVE 2 IS /RAM'S DRIVER VECTOR
NODEV = $BF10
;*
;* HARDWARE ADDRESSES
;*
KEYBD = $C000
CLRKBD = $C010
SPKR = $C030
LCRDEN = $C080
LCWTEN = $C081
ROMEN = $C082
LCRWEN = $C083
LCBNK2 = $00
LCBNK1 = $08
ALTZPOFF= $C008
ALTZPON = $C009
ALTRDOFF= $C002
ALTRDON = $C003
ALTWROFF= $C004
ALTWRON = $C005
!SOURCE "vmsrc/plvmzp.inc"
PSR = TMP+2
DVSIGN = PSR+1
DROP = $EF
NEXTOP = $F0
FETCHOP = NEXTOP+1
IP = FETCHOP+1
IPL = IP
IPH = IPL+1
OPIDX = FETCHOP+6
OPPAGE = OPIDX+1
STRBUF = $0280
INTERP = $03D0
;******************************
;* *
;* INTERPRETER INITIALIZATION *
;* *
;******************************
* = $2000
LDX #$FE
TXS
LDX #$00
STX $01FF
;*
;* DISCONNECT /RAM
;*
;SEI ; DISABLE /RAM
LDA MACHID
AND #$30
CMP #$30
BNE RAMDONE
LDA RAMSLOT
CMP NODEV
BNE RAMCONT
LDA RAMSLOT+1
CMP NODEV+1
BEQ RAMDONE
RAMCONT LDY DEVCNT
RAMLOOP LDA DEVLST,Y
AND #$F3
CMP #$B3
BEQ GETLOOP
DEY
BPL RAMLOOP
BMI RAMDONE
GETLOOP LDA DEVLST+1,Y
STA DEVLST,Y
BEQ RAMEXIT
INY
BNE GETLOOP
RAMEXIT LDA NODEV
STA RAMSLOT
LDA NODEV+1
STA RAMSLOT+1
DEC DEVCNT
RAMDONE ;CLI UNTIL I KNOW WHAT TO DO WITH THE UNENHANCED IIE
;*
;* MOVE VM INTO LANGUAGE CARD
;*
BIT LCRWEN+LCBNK2
BIT LCRWEN+LCBNK2
LDA #<VMCORE
STA SRCL
LDA #>VMCORE
STA SRCH
LDY #$00
STY DSTL
LDA #$D0
STA DSTH
- LDA (SRC),Y ; COPY VM+CMD INTO LANGUAGE CARD
STA (DST),Y
INY
BNE -
INC SRCH
INC DSTH
LDA DSTH
CMP #$E0
BNE -
;*
;* MOVE FIRST PAGE OF 'BYE' INTO PLACE
;*
STY SRCL
LDA #$D1
STA SRCH
- LDA (SRC),Y
STA $1000,Y
INY
BNE -
;*
;* INSERT 65C02 OPS IF APPLICABLE
;*
LDA #$00
INC
BEQ +
JSR C02OPS
;*
;* SET 64K ENTER/LEAVE (NO NEED FOR STRING POOL)
;*
+ LDA MACHID
AND #$30
CMP #$30
BEQ +
LDA #<ENTER64
STA OPTBL+$58
LDA #>ENTER64
STA OPTBL+$59
LDA #<LEAVE64
STA OPTBL+$5A
LDA #>LEAVE64
STA OPTBL+$5B
;*
;* SAVE DEFAULT COMMAND INTERPRETER PATH IN LC
;*
+ JSR PRODOS ; GET PREFIX
!BYTE $C7
!WORD GETPFXPARMS
LDY STRBUF ; APPEND "CMD"
LDA #"/"
CMP STRBUF,Y
BEQ +
INY
STA STRBUF,Y
+ LDA #"C"
INY
STA STRBUF,Y
LDA #"M"
INY
STA STRBUF,Y
LDA #"D"
INY
STA STRBUF,Y
STY STRBUF
BIT LCRWEN+LCBNK2 ; COPY TO LC FOR BYE
BIT LCRWEN+LCBNK2
- LDA STRBUF,Y
STA LCDEFCMD,Y
DEY
BPL -
JMP CMDENTRY
GETPFXPARMS !BYTE 1
!WORD STRBUF ; PATH STRING GOES HERE
;************************************************
;* *
;* LANGUAGE CARD RESIDENT PLASMA VM STARTS HERE *
;* *
;************************************************
VMCORE = *
!PSEUDOPC $D000 {
;****************
;* *
;* OPCODE TABLE *
;* *
;****************
!ALIGN 255,0
OPTBL !WORD ZERO,ADD,SUB,MUL,DIV,MOD,INCR,DECR ; 00 02 04 06 08 0A 0C 0E
!WORD NEG,COMP,BAND,IOR,XOR,SHL,SHR,IDXW ; 10 12 14 16 18 1A 1C 1E
!WORD LNOT,LOR,LAND,LA,LLA,CB,CW,CS ; 20 22 24 26 28 2A 2C 2E
!WORD DROP,DUP,NEXTOP,DIVMOD,BRGT,BRLT,BREQ,BRNE ; 30 32 34 36 38 3A 3C 3E
!WORD ISEQ,ISNE,ISGT,ISLT,ISGE,ISLE,BRFLS,BRTRU ; 40 42 44 46 48 4A 4C 4E
!WORD BRNCH,IBRNCH,CALL,ICAL,ENTER,LEAVE,RET,CFFB ; 50 52 54 56 58 5A 5C 5E
!WORD LB,LW,LLB,LLW,LAB,LAW,DLB,DLW ; 60 62 64 66 68 6A 6C 6E
!WORD SB,SW,SLB,SLW,SAB,SAW,DAB,DAW ; 70 72 74 76 78 7A 7C 7E
;*
;* ENTER INTO BYTECODE INTERPRETER
;*
DINTRP PLA
CLC
ADC #$01
STA IPL
PLA
ADC #$00
STA IPH
LDY #$00
LDA #>OPTBL
STA OPPAGE
JMP FETCHOP
IINTRP PLA
STA TMPL
PLA
STA TMPH
LDY #$02
LDA (TMP),Y
STA IPH
DEY
LDA (TMP),Y
STA IPL
DEY
+ LDA #>OPTBL
STA OPPAGE
JMP FETCHOP
IINTRPX PHP
PLA
STA PSR
SEI
PLA
STA TMPL
PLA
STA TMPH
LDY #$02
LDA (TMP),Y
STA IPH
DEY
LDA (TMP),Y
STA IPL
DEY
LDA #>OPXTBL
STA OPPAGE
STA ALTRDON
JMP FETCHOP
;************************************************************
;* *
;* 'BYE' PROCESSING - COPIED TO $1000 ON PRODOS BYE COMMAND *
;* *
;************************************************************
!ALIGN 255,0
!PSEUDOPC $1000 {
BYE LDY DEFCMD
- LDA DEFCMD,Y ; SET DEFAULT COMMAND WHEN CALLED FROM 'BYE'
STA STRBUF,Y
DEY
BPL -
; INY ; CLEAR CMDLINE BUFF
; STY $01FF
CMDENTRY = *
;
; DEACTIVATE 80 COL CARDS
;
BIT ROMEN
LDY #4
- LDA DISABLE80,Y
ORA #$80
JSR $FDED
DEY
BPL -
BIT $C054 ; SET TEXT MODE
BIT $C051
BIT $C05F
JSR $FC58 ; HOME
;
; INSTALL PAGE 0 FETCHOP ROUTINE
;
LDY #$0F
- LDA PAGE0,Y
STA DROP,Y
DEY
BPL -
;
; SET JMPTMP OPCODE
;
LDA #$4C
STA JMPTMP
;
; INSTALL PAGE 3 VECTORS
;
LDY #$12
- LDA PAGE3,Y
STA INTERP,Y
DEY
BPL -
;
; READ CMD INTO MEMORY
;
JSR PRODOS ; CLOSE EVERYTHING
!BYTE $CC
!WORD CLOSEPARMS
BNE FAIL
JSR PRODOS ; OPEN CMD
!BYTE $C8
!WORD OPENPARMS
BNE FAIL
LDA REFNUM
STA READPARMS+1
JSR PRODOS
!BYTE $CA
!WORD READPARMS
BNE FAIL
JSR PRODOS
!BYTE $CC
!WORD CLOSEPARMS
BNE FAIL
;
; INIT VM ENVIRONMENT STACK POINTERS
;
; LDA #$00
STA $01FF ; CLEAR CMDLINE BUFF
STA PPL ; INIT FRAME POINTER
STA IFPL
LDA #$BF
STA PPH
STA IFPH
LDX #$FE ; INIT STACK POINTER (YES, $FE. SEE GETS)
TXS
LDX #ESTKSZ/2 ; INIT EVAL STACK INDEX
;
; CHANGE CMD STRING TO SYSPATH STRING
;
LDA STRBUF
SEC
SBC #$03
STA STRBUF
JMP $2000 ; JUMP TO LOADED SYSTEM COMMAND
;
; PRINT FAIL MESSAGE, WAIT FOR KEYPRESS, AND REBOOT
;
FAIL INC $3F4 ; INVALIDATE POWER-UP BYTE
LDY #33
- LDA FAILMSG,Y
ORA #$80
JSR $FDED
DEY
BPL -
JSR $FD0C ; WAIT FOR KEYPRESS
JMP ($FFFC) ; RESET
OPENPARMS !BYTE 3
!WORD STRBUF
!WORD $0800
REFNUM !BYTE 0
READPARMS !BYTE 4
!BYTE 0
!WORD $2000
!WORD $9F00
!WORD 0
CLOSEPARMS !BYTE 1
!BYTE 0
DISABLE80 !BYTE 21, 13, '1', 26, 13
FAILMSG !TEXT "...TESER OT YEK YNA .DMC GNISSIM"
PAGE0 = *
;******************************
;* *
;* INTERP BYTECODE INNER LOOP *
;* *
;******************************
!PSEUDOPC DROP {
INX ; DROP @ $EF
INY ; NEXTOP @ $F0
LDA $FFFF,Y ; FETCHOP @ $F3, IP MAPS OVER $FFFF @ $F4
STA OPIDX
JMP (OPTBL) ; OPIDX AND OPPAGE MAP OVER OPTBL
}
PAGE3 = *
;*
;* PAGE 3 VECTORS INTO INTERPRETER
;*
!PSEUDOPC $03D0 {
BIT LCRDEN+LCBNK2 ; $03D0 - DIRECT INTERP ENTRY
JMP DINTRP
BIT LCRDEN+LCBNK2 ; $03D6 - INDIRECT INTERP ENTRY
JMP IINTRP
BIT LCRDEN+LCBNK2 ; $03DC - INDIRECT INTERPX ENTRY
JMP IINTRPX
}
DEFCMD !FILL 28
ENDBYE = *
}
LCDEFCMD = *-28 ; DEFCMD IN LC MEMORY
;*****************
;* *
;* OPXCODE TABLE *
;* *
;*****************
!ALIGN 255,0
OPXTBL !WORD ZERO,ADD,SUB,MUL,DIV,MOD,INCR,DECR ; 00 02 04 06 08 0A 0C 0E
!WORD NEG,COMP,BAND,IOR,XOR,SHL,SHR,IDXW ; 10 12 14 16 18 1A 1C 1E
!WORD LNOT,LOR,LAND,LA,LLA,CB,CW,CSX ; 20 22 24 26 28 2A 2C 2E
!WORD DROP,DUP,NEXTOP,DIVMOD,BRGT,BRLT,BREQ,BRNE ; 30 32 34 36 38 3A 3C 3E
!WORD ISEQ,ISNE,ISGT,ISLT,ISGE,ISLE,BRFLS,BRTRU ; 40 42 44 46 48 4A 4C 4E
!WORD BRNCH,IBRNCH,CALLX,ICALX,ENTER,LEAVEX,RETX,CFFB; 50 52 54 56 58 5A 5C 5E
!WORD LBX,LWX,LLBX,LLWX,LABX,LAWX,DLB,DLW ; 60 62 64 66 68 6A 6C 6E
!WORD SB,SW,SLB,SLW,SAB,SAW,DAB,DAW ; 70 72 74 76 78 7A 7C 7E
;*
;* ADD TOS TO TOS-1
;*
ADD LDA ESTKL,X
CLC
ADC ESTKL+1,X
STA ESTKL+1,X
LDA ESTKH,X
ADC ESTKH+1,X
STA ESTKH+1,X
JMP DROP
;*
;* SUB TOS FROM TOS-1
;*
SUB LDA ESTKL+1,X
SEC
SBC ESTKL,X
STA ESTKL+1,X
LDA ESTKH+1,X
SBC ESTKH,X
STA ESTKH+1,X
JMP DROP
;*
;* SHIFT TOS LEFT BY 1, ADD TO TOS-1
;*
IDXW LDA ESTKL,X
ASL
ROL ESTKH,X
CLC
ADC ESTKL+1,X
STA ESTKL+1,X
LDA ESTKH,X
ADC ESTKH+1,X
STA ESTKH+1,X
JMP DROP
;*
;* MUL TOS-1 BY TOS
;*
MUL STY IPY
LDY #$10
LDA ESTKL+1,X
EOR #$FF
STA TMPL
LDA ESTKH+1,X
EOR #$FF
STA TMPH
LDA #$00
STA ESTKL+1,X ; PRODL
; STA ESTKH+1,X ; PRODH
_MULLP LSR TMPH ; MULTPLRH
ROR TMPL ; MULTPLRL
BCS +
STA ESTKH+1,X ; PRODH
LDA ESTKL,X ; MULTPLNDL
ADC ESTKL+1,X ; PRODL
STA ESTKL+1,X
LDA ESTKH,X ; MULTPLNDH
ADC ESTKH+1,X ; PRODH
+ ASL ESTKL,X ; MULTPLNDL
ROL ESTKH,X ; MULTPLNDH
DEY
BNE _MULLP
STA ESTKH+1,X ; PRODH
LDY IPY
JMP DROP
;*
;* INTERNAL DIVIDE ALGORITHM
;*
_NEG LDA #$00
SEC
SBC ESTKL,X
STA ESTKL,X
LDA #$00
SBC ESTKH,X
STA ESTKH,X
RTS
_DIV STY IPY
LDY #$11 ; #BITS+1
LDA #$00
STA TMPL ; REMNDRL
STA TMPH ; REMNDRH
LDA ESTKH,X
AND #$80
STA DVSIGN
BPL +
JSR _NEG
INC DVSIGN
+ LDA ESTKH+1,X
BPL +
INX
JSR _NEG
DEX
INC DVSIGN
BNE _DIV1
+ ORA ESTKL+1,X ; DVDNDL
BEQ _DIVEX
_DIV1 ASL ESTKL+1,X ; DVDNDL
ROL ESTKH+1,X ; DVDNDH
DEY
BCC _DIV1
_DIVLP ROL TMPL ; REMNDRL
ROL TMPH ; REMNDRH
LDA TMPL ; REMNDRL
CMP ESTKL,X ; DVSRL
LDA TMPH ; REMNDRH
SBC ESTKH,X ; DVSRH
BCC +
STA TMPH ; REMNDRH
LDA TMPL ; REMNDRL
SBC ESTKL,X ; DVSRL
STA TMPL ; REMNDRL
SEC
+ ROL ESTKL+1,X ; DVDNDL
ROL ESTKH+1,X ; DVDNDH
DEY
BNE _DIVLP
_DIVEX INX
LDY IPY
RTS
;*
;* NEGATE TOS
;*
NEG LDA #$00
SEC
SBC ESTKL,X
STA ESTKL,X
LDA #$00
SBC ESTKH,X
STA ESTKH,X
JMP NEXTOP
;*
;* DIV TOS-1 BY TOS
;*
DIV JSR _DIV
LSR DVSIGN ; SIGN(RESULT) = (SIGN(DIVIDEND) + SIGN(DIVISOR)) & 1
BCS NEG
JMP NEXTOP
;*
;* MOD TOS-1 BY TOS
;*
MOD JSR _DIV
LDA TMPL ; REMNDRL
STA ESTKL,X
LDA TMPH ; REMNDRH
STA ESTKH,X
LDA DVSIGN ; REMAINDER IS SIGN OF DIVIDEND
BMI NEG
JMP NEXTOP
;*
;* DIVMOD TOS-1 BY TOS
;*
DIVMOD JSR _DIV
LSR DVSIGN ; SIGN(RESULT) = (SIGN(DIVIDEND) + SIGN(DIVISOR)) & 1
BCC +
JSR _NEG
+ DEX
LDA TMPL ; REMNDRL
STA ESTKL,X
LDA TMPH ; REMNDRH
STA ESTKH,X
LDA DVSIGN ; REMAINDER IS SIGN OF DIVIDEND
BMI NEG
JMP NEXTOP
;*
;* INCREMENT TOS
;*
INCR INC ESTKL,X
BEQ +
JMP NEXTOP
+ INC ESTKH,X
JMP NEXTOP
;*
;* DECREMENT TOS
;*
DECR LDA ESTKL,X
BEQ +
DEC ESTKL,X
JMP NEXTOP
+ DEC ESTKL,X
DEC ESTKH,X
JMP NEXTOP
;*
;* BITWISE COMPLIMENT TOS
;*
COMP LDA #$FF
EOR ESTKL,X
STA ESTKL,X
LDA #$FF
EOR ESTKH,X
STA ESTKH,X
JMP NEXTOP
;*
;* BITWISE AND TOS TO TOS-1
;*
BAND LDA ESTKL+1,X
AND ESTKL,X
STA ESTKL+1,X
LDA ESTKH+1,X
AND ESTKH,X
STA ESTKH+1,X
JMP DROP
;*
;* INCLUSIVE OR TOS TO TOS-1
;*
IOR LDA ESTKL+1,X
ORA ESTKL,X
STA ESTKL+1,X
LDA ESTKH+1,X
ORA ESTKH,X
STA ESTKH+1,X
JMP DROP
;*
;* EXLUSIVE OR TOS TO TOS-1
;*
XOR LDA ESTKL+1,X
EOR ESTKL,X
STA ESTKL+1,X
LDA ESTKH+1,X
EOR ESTKH,X
STA ESTKH+1,X
JMP DROP
;*
;* SHIFT TOS-1 LEFT BY TOS
;*
SHL STY IPY
LDA ESTKL,X
CMP #$08
BCC +
LDY ESTKL+1,X
STY ESTKH+1,X
LDY #$00
STY ESTKL+1,X
SBC #$08
+ TAY
BEQ +
LDA ESTKL+1,X
- ASL
ROL ESTKH+1,X
DEY
BNE -
STA ESTKL+1,X
+ LDY IPY
JMP DROP
;*
;* SHIFT TOS-1 RIGHT BY TOS
;*
SHR STY IPY
LDA ESTKL,X
CMP #$08
BCC ++
LDY ESTKH+1,X
STY ESTKL+1,X
CPY #$80
LDY #$00
BCC +
DEY
+ STY ESTKH+1,X
SEC
SBC #$08
++ TAY
BEQ +
LDA ESTKH+1,X
- CMP #$80
ROR
ROR ESTKL+1,X
DEY
BNE -
STA ESTKH+1,X
+ LDY IPY
JMP DROP
;*
;* LOGICAL AND
;*
LAND LDA ESTKL+1,X
ORA ESTKH+1,X
BEQ ++
LDA ESTKL,X
ORA ESTKH,X
BEQ +
LDA #$FF
+ STA ESTKL+1,X
STA ESTKH+1,X
++ JMP DROP
;*
;* LOGICAL OR
;*
LOR LDA ESTKL,X
ORA ESTKH,X
ORA ESTKL+1,X
ORA ESTKH+1,X
BEQ +
LDA #$FF
STA ESTKL+1,X
STA ESTKH+1,X
+ JMP DROP
;*
;* DUPLICATE TOS
;*
DUP DEX
LDA ESTKL+1,X
STA ESTKL,X
LDA ESTKH+1,X
STA ESTKH,X
JMP NEXTOP
;*
;* LOGICAL NOT
;*
LNOT LDA ESTKL,X
ORA ESTKH,X
BNE +
LDA #$FF
STA ESTKL,X
STA ESTKH,X
JMP NEXTOP
;*
;* CONSTANT
;*
ZERO DEX
+ LDA #$00
STA ESTKL,X
STA ESTKH,X
JMP NEXTOP
CFFB DEX
LDA #$FF
STA ESTKH,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKL,X
JMP NEXTOP
CB DEX
LDA #$00
STA ESTKH,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKL,X
JMP NEXTOP
;*
;* LOAD ADDRESS & LOAD CONSTANT WORD (SAME THING, WITH OR WITHOUT FIXUP)
;*
- TYA ; RENORMALIZE IP
CLC
ADC IPL
STA IPL
BCC +
INC IPH
+ LDY #$FF
LA INY ;+INC_IP
BMI -
DEX
LDA (IP),Y
STA ESTKL,X
INY
LDA (IP),Y
STA ESTKH,X
JMP NEXTOP
CW DEX
INY ;+INC_IP
LDA (IP),Y
STA ESTKL,X
INY
LDA (IP),Y
STA ESTKH,X
JMP NEXTOP
;*
;* CONSTANT STRING
;*
CS DEX
;INY ;+INC_IP
TYA ; NORMALIZE IP AND SAVE STRING ADDR ON ESTK
SEC
ADC IPL
STA IPL
STA ESTKL,X
LDA #$00
TAY
ADC IPH
STA IPH
STA ESTKH,X
LDA (IP),Y
TAY
JMP NEXTOP
;
CSX DEX
;INY ;+INC_IP
TYA ; NORMALIZE IP
SEC
ADC IPL
STA IPL
LDA #$00
TAY
ADC IPH
STA IPH
LDA PPL ; SCAN POOL FOR STRING ALREADY THERE
STA TMPL
LDA PPH
STA TMPH
_CMPPSX ;LDA TMPH ; CHECK FOR END OF POOL
CMP IFPH
BCC _CMPSX ; CHECK FOR MATCHING STRING
BNE _CPYSX ; BEYOND END OF POOL, COPY STRING OVER
LDA TMPL
CMP IFPL
BCS _CPYSX ; AT OR BEYOND END OF POOL, COPY STRING OVER
_CMPSX STA ALTRDOFF
LDA (TMP),Y ; COMPARE STRINGS FROM AUX MEM TO STRINGS IN MAIN MEM
STA ALTRDON
CMP (IP),Y ; COMPARE STRING LENGTHS
BNE _CNXTSX1
TAY
_CMPCSX STA ALTRDOFF
LDA (TMP),Y ; COMPARE STRING CHARS FROM END
STA ALTRDON
CMP (IP),Y
BNE _CNXTSX
DEY
BNE _CMPCSX
LDA TMPL ; MATCH - SAVE EXISTING ADDR ON ESTK AND MOVE ON
STA ESTKL,X
LDA TMPH
STA ESTKH,X
BNE _CEXSX
_CNXTSX LDY #$00
STA ALTRDOFF
LDA (TMP),Y
STA ALTRDON
_CNXTSX1 SEC
ADC TMPL
STA TMPL
LDA #$00
ADC TMPH
STA TMPH
BNE _CMPPSX
_CPYSX LDA (IP),Y ; COPY STRING FROM AUX TO MAIN MEM POOL
TAY ; MAKE ROOM IN POOL AND SAVE ADDR ON ESTK
EOR #$FF
CLC
ADC PPL
STA PPL
STA ESTKL,X
LDA #$FF
ADC PPH
STA PPH
STA ESTKH,X ; COPY STRING FROM AUX MEM BYTECODE TO MAIN MEM POOL
_CPYSX1 LDA (IP),Y ; ALTRD IS ON, NO NEED TO CHANGE IT HERE
STA (PP),Y ; ALTWR IS OFF, NO NEED TO CHANGE IT HERE
DEY
CPY #$FF
BNE _CPYSX1
INY
_CEXSX LDA (IP),Y ; SKIP TO NEXT OP ADDR AFTER STRING
TAY
JMP NEXTOP
;*
;* LOAD VALUE FROM ADDRESS TAG
;*
LB LDA ESTKL,X
STA ESTKH-1,X
LDA (ESTKH-1,X)
STA ESTKL,X
LDA #$00
STA ESTKH,X
JMP NEXTOP
LW LDA ESTKL,X
STA ESTKH-1,X
LDA (ESTKH-1,X)
STA ESTKL,X
INC ESTKH-1,X
BEQ +
LDA (ESTKH-1,X)
STA ESTKH,X
JMP NEXTOP
+ INC ESTKH,X
LDA (ESTKH-1,X)
STA ESTKH,X
JMP NEXTOP
;
LBX LDA ESTKL,X
STA ESTKH-1,X
STA ALTRDOFF
LDA (ESTKH-1,X)
STA ESTKL,X
LDA #$00
STA ESTKH,X
STA ALTRDON
JMP NEXTOP
LWX LDA ESTKL,X
STA ESTKH-1,X
STA ALTRDOFF
LDA (ESTKH-1,X)
STA ESTKL,X
INC ESTKH-1,X
BEQ +
LDA (ESTKH-1,X)
STA ESTKH,X
STA ALTRDON
JMP NEXTOP
+ INC ESTKH,X
LDA (ESTKH-1,X)
STA ESTKH,X
STA ALTRDON
JMP NEXTOP
;*
;* LOAD ADDRESS OF LOCAL FRAME OFFSET
;*
- TYA ; RENORMALIZE IP
CLC
ADC IPL
STA IPL
BCC +
INC IPH
+ LDY #$FF
LLA INY ;+INC_IP
BMI -
LDA (IP),Y
DEX
CLC
ADC IFPL
STA ESTKL,X
LDA #$00
ADC IFPH
STA ESTKH,X
JMP NEXTOP
;*
;* LOAD VALUE FROM LOCAL FRAME OFFSET
;*
LLB INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
DEX
LDA (IFP),Y
STA ESTKL,X
LDA #$00
STA ESTKH,X
LDY IPY
JMP NEXTOP
LLW INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
DEX
LDA (IFP),Y
STA ESTKL,X
INY
LDA (IFP),Y
STA ESTKH,X
LDY IPY
JMP NEXTOP
;
LLBX INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
DEX
STA ALTRDOFF
LDA (IFP),Y
STA ESTKL,X
LDA #$00
STA ESTKH,X
STA ALTRDON
LDY IPY
JMP NEXTOP
LLWX INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
DEX
STA ALTRDOFF
LDA (IFP),Y
STA ESTKL,X
INY
LDA (IFP),Y
STA ESTKH,X
STA ALTRDON
LDY IPY
JMP NEXTOP
;*
;* LOAD VALUE FROM ABSOLUTE ADDRESS
;*
LAB INY ;+INC_IP
LDA (IP),Y
STA ESTKH-2,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKH-1,X
LDA (ESTKH-2,X)
DEX
STA ESTKL,X
LDA #$00
STA ESTKH,X
JMP NEXTOP
LAW INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
LDY #$00
LDA (TMP),Y
DEX
STA ESTKL,X
INY
LDA (TMP),Y
STA ESTKH,X
LDY IPY
JMP NEXTOP
;
LABX INY ;+INC_IP
LDA (IP),Y
STA ESTKH-2,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKH-1,X
STA ALTRDOFF
LDA (ESTKH-2,X)
DEX
STA ESTKL,X
LDA #$00
STA ESTKH,X
STA ALTRDON
JMP NEXTOP
LAWX INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
STA ALTRDOFF
LDY #$00
LDA (TMP),Y
DEX
STA ESTKL,X
INY
LDA (TMP),Y
STA ESTKH,X
STA ALTRDON
LDY IPY
JMP NEXTOP
;*
;* STORE VALUE TO ADDRESS
;*
SB LDA ESTKL,X
STA ESTKH-1,X
LDA ESTKL+1,X
STA (ESTKH-1,X)
INX
JMP DROP
SW LDA ESTKL,X
STA ESTKH-1,X
LDA ESTKL+1,X
STA (ESTKH-1,X)
LDA ESTKH+1,X
INC ESTKH-1,X
BEQ +
STA (ESTKH-1,X)
INX
JMP DROP
+ INC ESTKH,X
STA (ESTKH-1,X)
INX
JMP DROP
;*
;* STORE VALUE TO LOCAL FRAME OFFSET
;*
SLB INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
LDA ESTKL,X
STA (IFP),Y
LDY IPY
BMI FIXDROP
JMP DROP
SLW INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
LDA ESTKL,X
STA (IFP),Y
INY
LDA ESTKH,X
STA (IFP),Y
LDY IPY
BMI FIXDROP
JMP DROP
FIXDROP TYA
LDY #$00
CLC
ADC IPL
STA IPL
BCC +
INC IPH
+ JMP DROP
;*
;* STORE VALUE TO LOCAL FRAME OFFSET WITHOUT POPPING STACK
;*
DLB INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
LDA ESTKL,X
STA (IFP),Y
LDY IPY
JMP NEXTOP
DLW INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
LDA ESTKL,X
STA (IFP),Y
INY
LDA ESTKH,X
STA (IFP),Y
LDY IPY
JMP NEXTOP
;*
;* STORE VALUE TO ABSOLUTE ADDRESS
;*
- TYA ; RENORMALIZE IP
CLC
ADC IPL
STA IPL
BCC +
INC IPH
+ LDY #$FF
SAB INY ;+INC_IP
BMI -
LDA (IP),Y
STA ESTKH-2,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKH-1,X
LDA ESTKL,X
STA (ESTKH-2,X)
JMP DROP
SAW INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
LDY #$00
LDA ESTKL,X
STA (TMP),Y
INY
LDA ESTKH,X
STA (TMP),Y
LDY IPY
BMI +
JMP DROP
+ JMP FIXDROP
;*
;* STORE VALUE TO ABSOLUTE ADDRESS WITHOUT POPPING STACK
;*
DAB INY ;+INC_IP
LDA (IP),Y
STA ESTKH-2,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKH-1,X
LDA ESTKL,X
STA (ESTKH-2,X)
JMP NEXTOP
DAW INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
LDY #$00
LDA ESTKL,X
STA (TMP),Y
INY
LDA ESTKH,X
STA (TMP),Y
LDY IPY
JMP NEXTOP
;*
;* COMPARES
;*
ISEQ LDA ESTKL,X
CMP ESTKL+1,X
BNE ISFLS
LDA ESTKH,X
CMP ESTKH+1,X
BNE ISFLS
ISTRU LDA #$FF
STA ESTKL+1,X
STA ESTKH+1,X
JMP DROP
;
ISNE LDA ESTKL,X
CMP ESTKL+1,X
BNE ISTRU
LDA ESTKH,X
CMP ESTKH+1,X
BNE ISTRU
ISFLS LDA #$00
STA ESTKL+1,X
STA ESTKH+1,X
JMP DROP
;
ISGE LDA ESTKL+1,X
CMP ESTKL,X
LDA ESTKH+1,X
SBC ESTKH,X
BVS +
BPL ISTRU
BMI ISFLS
+ BPL ISFLS
BMI ISTRU
;
ISGT LDA ESTKL,X
CMP ESTKL+1,X
LDA ESTKH,X
SBC ESTKH+1,X
BVS +
BMI ISTRU
BPL ISFLS
+ BMI ISFLS
BPL ISTRU
;
ISLE LDA ESTKL,X
CMP ESTKL+1,X
LDA ESTKH,X
SBC ESTKH+1,X
BVS +
BPL ISTRU
BMI ISFLS
+ BPL ISFLS
BMI ISTRU
;
ISLT LDA ESTKL+1,X
CMP ESTKL,X
LDA ESTKH+1,X
SBC ESTKH,X
BVS +
BMI ISTRU
BPL ISFLS
+ BMI ISFLS
BPL ISTRU
;*
;* BRANCHES
;*
BRTRU INX
LDA ESTKH-1,X
ORA ESTKL-1,X
BNE BRNCH
NOBRNCH INY ;+INC_IP
INY
BMI FIXNEXT
JMP NEXTOP
FIXNEXT TYA
LDY #$00
CLC
ADC IPL
STA IPL
BCC +
INC IPH
+ JMP NEXTOP
BRFLS INX
LDA ESTKH-1,X
ORA ESTKL-1,X
BNE NOBRNCH
BRNCH TYA ; FLATTEN IP
SEC
ADC IPL
STA TMPL
LDA #$00
TAY
ADC IPH
STA TMPH ; ADD BRANCH OFFSET
LDA (TMP),Y
;CLC ; BETTER NOT CARRY OUT OF IP+Y
ADC TMPL
STA IPL
INY
LDA (TMP),Y
ADC TMPH
STA IPH
DEY
JMP FETCHOP
BREQ INX
LDA ESTKL-1,X
CMP ESTKL,X
BNE NOBRNCH
LDA ESTKH-1,X
CMP ESTKH,X
BEQ BRNCH
BNE NOBRNCH
BRNE INX
LDA ESTKL-1,X
CMP ESTKL,X
BNE BRNCH
LDA ESTKH-1,X
CMP ESTKH,X
BEQ NOBRNCH
BNE BRNCH
BRGT INX
LDA ESTKL-1,X
CMP ESTKL,X
LDA ESTKH-1,X
SBC ESTKH,X
BVS +
BPL NOBRNCH
BMI BRNCH
+ BPL BRNCH
BMI NOBRNCH
BRLT INX
LDA ESTKL,X
CMP ESTKL-1,X
LDA ESTKH,X
SBC ESTKH-1,X
BVS +
BPL NOBRNCH
BMI BRNCH
+ BPL BRNCH
BMI NOBRNCH
IBRNCH TYA ; FLATTEN IP
CLC
ADC IPL
STA TMPL
LDA #$00
TAY
ADC IPH
STA TMPH ; ADD BRANCH OFFSET
LDA TMPL
;CLC ; BETTER NOT CARRY OUT OF IP+Y
ADC ESTKL,X
STA IPL
LDA TMPH
ADC ESTKH,X
STA IPH
JMP DROP
;*
;* CALL INTO ABSOLUTE ADDRESS (NATIVE CODE)
;*
CALL INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
TYA
CLC
ADC IPL
PHA
LDA IPH
ADC #$00
PHA
JSR JMPTMP
PLA
STA IPH
PLA
STA IPL
LDA #>OPTBL ; MAKE SURE WE'RE INDEXING THE RIGHT TABLE
STA OPPAGE
LDY #$01
JMP FETCHOP
;
CALLX INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
TYA
CLC
ADC IPL
PHA
LDA IPH
ADC #$00
PHA
STA ALTRDOFF
LDA PSR
PHA
PLP
JSR JMPTMP
PHP
PLA
STA PSR
SEI
STA ALTRDON
PLA
STA IPH
PLA
STA IPL
LDA #>OPXTBL ; MAKE SURE WE'RE INDEXING THE RIGHT TABLE
STA OPPAGE
LDY #$01
JMP FETCHOP
;*
;* INDIRECT CALL TO ADDRESS (NATIVE CODE)
;*
ICAL LDA ESTKL,X
STA TMPL
LDA ESTKH,X
STA TMPH
INX
TYA
CLC
ADC IPL
PHA
LDA IPH
ADC #$00
PHA
JSR JMPTMP
PLA
STA IPH
PLA
STA IPL
LDA #>OPTBL ; MAKE SURE WE'RE INDEXING THE RIGHT TABLE
STA OPPAGE
LDY #$01
JMP FETCHOP
;
ICALX LDA ESTKL,X
STA TMPL
LDA ESTKH,X
STA TMPH
INX
TYA
CLC
ADC IPL
PHA
LDA IPH
ADC #$00
PHA
STA ALTRDOFF
LDA PSR
PHA
PLP
JSR JMPTMP
PHP
PLA
STA PSR
STA ALTRDON
PLA
STA IPH
PLA
STA IPL
LDA #>OPXTBL ; MAKE SURE WE'RE INDEXING THE RIGHT TABLE
STA OPPAGE
LDY #$01
JMP FETCHOP
;*
;* JUMP INDIRECT TRHOUGH TMP
;*
;JMPTMP JMP (TMP)
;*
;* ENTER FUNCTION WITH FRAME SIZE AND PARAM COUNT
;*
ENTER64 INY
LDA (IP),Y
EOR #$FF
SEC
ADC IFPL
STA IFPL
BCS +
DEC IFPH
+ INY
LDA (IP),Y
BEQ +
ASL
TAY
- LDA ESTKH,X
DEY
STA (IFP),Y
LDA ESTKL,X
INX
DEY
STA (IFP),Y
BNE -
+ LDY #$03
JMP FETCHOP
ENTER LDA IFPH
PHA ; SAVE ON STACK FOR LEAVE
LDA IFPL
PHA
INY
LDA (IP),Y
EOR #$FF ; ALLOCATE FRAME
SEC
ADC PPL
STA PPL
STA IFPL
LDA #$FF
ADC PPH
STA PPH
STA IFPH
INY
LDA (IP),Y
BEQ +
ASL
TAY
- LDA ESTKH,X
DEY
STA (IFP),Y
LDA ESTKL,X
INX
DEY
STA (IFP),Y
BNE -
+ LDY #$03
JMP FETCHOP
;*
;* LEAVE FUNCTION
;*
LEAVEX INY ;+INC_IP
LDA (IP),Y
CLC
ADC IFPL
STA PPL
LDA #$00
ADC IFPH
STA PPH
PLA ; RESTORE PREVIOUS FRAME
STA IFPL
PLA
STA IFPH
RETX STA ALTRDOFF
LDA PSR
PHA
PLP
RTS
LEAVE64 INY ;+INC_IP
LDA (IP),Y
CLC
ADC IFPL
STA IFPL
BCS +
RTS
+ INC IFPH
RTS
LEAVE INY ;+INC_IP
LDA (IP),Y
CLC
ADC IFPL
STA PPL
LDA #$00
ADC IFPH
STA PPH
PLA ; RESTORE PREVIOUS FRAME
STA IFPL
PLA
STA IFPH
RET RTS
VMEND = *
}
;***************************************
;* *
;* 65C02 OPS TO OVERWRITE STANDARD OPS *
;* *
;***************************************
C02OPS LDA #<DINTRP
LDX #>DINTRP
LDY #(CDINTRPEND-CDINTRP)
JSR OPCPY
CDINTRP PLY
PLA
INY
BNE +
INC
+ STY IPL
STA IPH
LDY #$00
LDA #>OPTBL
STA OPPAGE
JMP FETCHOP
CDINTRPEND
;
LDA #<ZERO
LDX #>ZERO
LDY #(CZEROEND-CZERO)
JSR OPCPY
CZERO DEX
STZ ESTKL,X
STZ ESTKH,X
JMP NEXTOP
CZEROEND
;
LDA #<CB
LDX #>CB
LDY #(CCBEND-CCB)
JSR OPCPY
CCB DEX
STZ ESTKH,X
INY
LDA (IP),Y
STA ESTKL,X
JMP NEXTOP
CCBEND
;
LDA #<CS
LDX #>CS
LDY #(CCSEND-CCS)
JSR OPCPY
CCS DEX
;INY ;+INC_IP
TYA ; NORMALIZE IP AND SAVE STRING ADDR ON ESTK
SEC
ADC IPL
STA IPL
STA ESTKL,X
LDA #$00
ADC IPH
STA IPH
STA ESTKH,X
LDA (IP)
TAY
JMP NEXTOP
CCSEND
;
LDA #<SHL
LDX #>SHL
LDY #(CSHLEND-CSHL)
JSR OPCPY
CSHL STY IPY
LDA ESTKL,X
CMP #$08
BCC +
LDY ESTKL+1,X
STY ESTKH+1,X
STZ ESTKL+1,X
SBC #$08
+ TAY
BEQ +
LDA ESTKL+1,X
- ASL
ROL ESTKH+1,X
DEY
BNE -
STA ESTKL+1,X
+ LDY IPY
JMP DROP
CSHLEND
;
LDA #<LB
LDX #>LB
LDY #(CLBEND-CLB)
JSR OPCPY
CLB LDA ESTKL,X
STA ESTKH-1,X
LDA (ESTKH-1,X)
STA ESTKL,X
STZ ESTKH,X
JMP NEXTOP
CLBEND
;
LDA #<LBX
LDX #>LBX
LDY #(CLBXEND-CLBX)
JSR OPCPY
CLBX LDA ESTKL,X
STA ESTKH-1,X
STA ALTRDOFF
LDA (ESTKH-1,X)
STA ESTKL,X
STZ ESTKH,X
STA ALTRDON
JMP NEXTOP
CLBXEND
;
LDA #<LLB
LDX #>LLB
LDY #(CLLBEND-CLLB)
JSR OPCPY
CLLB INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
DEX
LDA (IFP),Y
STA ESTKL,X
STZ ESTKH,X
LDY IPY
JMP NEXTOP
CLLBEND
;
LDA #<LLBX
LDX #>LLBX
LDY #(CLLBXEND-CLLBX)
JSR OPCPY
CLLBX INY ;+INC_IP
LDA (IP),Y
STY IPY
TAY
DEX
STA ALTRDOFF
LDA (IFP),Y
STA ESTKL,X
STZ ESTKH,X
STA ALTRDON
LDY IPY
JMP NEXTOP
CLLBXEND
;
LDA #<LAB
LDX #>LAB
LDY #(CLABEND-CLAB)
JSR OPCPY
CLAB INY ;+INC_IP
LDA (IP),Y
STA ESTKH-2,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKH-1,X
LDA (ESTKH-2,X)
DEX
STA ESTKL,X
STZ ESTKH,X
JMP NEXTOP
CLABEND
;
LDA #<LAW
LDX #>LAW
LDY #(CLAWEND-CLAW)
JSR OPCPY
CLAW INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
LDA (TMP)
DEX
STA ESTKL,X
LDY #$01
LDA (TMP),Y
STA ESTKH,X
LDY IPY
JMP NEXTOP
CLAWEND
;
LDA #<LABX
LDX #>LABX
LDY #(CLABXEND-CLABX)
JSR OPCPY
CLABX INY ;+INC_IP
LDA (IP),Y
STA ESTKH-2,X
INY ;+INC_IP
LDA (IP),Y
STA ESTKH-1,X
STA ALTRDOFF
LDA (ESTKH-2,X)
DEX
STA ESTKL,X
STZ ESTKH,X
STA ALTRDON
JMP NEXTOP
CLABXEND
;
LDA #<LAWX
LDX #>LAWX
LDY #(CLAWXEND-CLAWX)
JSR OPCPY
CLAWX INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
STA ALTRDOFF
LDA (TMP)
DEX
STA ESTKL,X
LDY #$01
LDA (TMP),Y
STA ESTKH,X
STA ALTRDON
LDY IPY
JMP NEXTOP
CLAWXEND
;
LDA #<SAW
LDX #>SAW
LDY #(CSAWEND-CSAW)
JSR OPCPY
CSAW INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
LDA ESTKL,X
STA (TMP)
LDY #$01
LDA ESTKH,X
STA (TMP),Y
LDY IPY
BMI +
JMP DROP
+ JMP FIXDROP
CSAWEND
;
LDA #<DAW
LDX #>DAW
LDY #(CDAWEND-CDAW)
JSR OPCPY
CDAW INY ;+INC_IP
LDA (IP),Y
STA TMPL
INY ;+INC_IP
LDA (IP),Y
STA TMPH
STY IPY
LDA ESTKL,X
STA (TMP)
LDY #$01
LDA ESTKH,X
STA (TMP),Y
LDY IPY
JMP NEXTOP
CDAWEND
;
LDA #<ISFLS
LDX #>ISFLS
LDY #(CISFLSEND-CISFLS)
JSR OPCPY
CISFLS STZ ESTKL+1,X
STZ ESTKH+1,X
JMP DROP
CISFLSEND
;
LDA #<BRNCH
LDX #>BRNCH
LDY #(CBRNCHEND-CBRNCH)
JSR OPCPY
CBRNCH TYA ; FLATTEN IP
SEC
ADC IPL
STA TMPL
LDA #$00
ADC IPH
STA TMPH ; ADD BRANCH OFFSET
LDA (TMP)
;CLC ; BETTER NOT CARRY OUT OF IP+Y
ADC TMPL
STA IPL
LDY #$01
LDA (TMP),Y
ADC TMPH
STA IPH
DEY
JMP FETCHOP
CBRNCHEND
;
RTS
;*
;* COPY OP TO VM
;*
OPCPY STA DST
STX DST+1
PLA
STA SRC
PLA
STA SRC+1
TYA
CLC
ADC SRC
TAX
LDA #$00
ADC SRC+1
PHA
PHX
INC SRC
BNE +
INC SRC+1
+
- LDA (SRC),Y
STA (DST),Y
DEY
BPL -
RTS
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