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CODE8086.Z80
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1991-11-16
|
16KB
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1,210 lines
; *** CODE8086.Z80 *** VERSION 1.0 09/25/84
; LAST EDIT 9/25/84
;
; 8086 INSTRUCTIONS TO EMULATE Z80 OP CODES
;
CODE00: ;NOP
RET
CODE01: ;LD BC,nnnn
INC SI
INC SI
MOV Z_BC,BX
SAHF
RET
CODE02: ;LD (BC),A
MOV BX,Z_BC
MOV AL,Z_A
MOV ES:[BX],AL
RET
CODE03: ;INC BC
INC Z_BC
SAHF
RET
CODE04: ;INC B
INC Z_B
RET
CODE05: ;DEC B
DEC Z_B
RET
CODE06: ;LD B,nn
INC SI
MOV Z_B,BL
SAHF
RET
CODE07: ;RLCA
ROL Z_A,1
RET
CODE08: ;EX AF,AF'
MOV AX,Z_AF
PUSH AX
MOV AX,Z_ALTA
MOV Z_AF,AX
POP AX
MOV Z_ALTA,AX
RET
CODE09: ;ADD HL,BC
PUSHF
MOV AX,Z_BC
ADD Z_HL,AX
JMP CYSAV
CODE0A: ;LD A,(BC)
MOV BX,Z_BC
MOV AL,ES:[BX]
MOV Z_A,AL
RET
CODE0B: ;DEC BC
DEC Z_BC
SAHF
RET
CODE0C: ;INC C
INC Z_C
RET
CODE0D: ;DEC C
DEC Z_C
RET
CODE0E: ;LD C,nn
INC SI
MOV Z_C,BL
SAHF
RET
CODE0F: ;RRCA
RCR Z_A,1
RET
CODE10: ;DJNZ
INC SI
DEC Z_B
JNZ RELJMP
RET
CODE11: ;LD DE,nnnn
INC SI
INC SI
MOV Z_DE,BX
SAHF
RET
CODE12: ;LD (DE),A
MOV BX,Z_DE
MOV AL,Z_A
MOV ES:[BX],AL
RET
CODE13: ;INC DE
INC Z_DE
SAHF
RET
CODE14: ;INC D
INC Z_D
RET
CODE15: ;DEC D
DEC Z_D
RET
CODE16: ;LD D,nn
INC SI
MOV Z_D,BL
SAHF
RET
CODE17: ;RLA
RCL Z_A,1
RET
CODE18: ;JR dd
INC SI
SAHF
JMPS RELJMP
CODE19: ;ADD HL,DE
PUSHF
MOV AX,Z_DE
ADD Z_HL,AX
CYSAV: JC CYSET
CYCLR: POPF
CLC
RET
CYSET: POPF
STC
RET
CODE1A: ;LD A,(DE)
MOV BX,Z_DE
MOV AL,ES:[BX]
MOV Z_A,AL
RET
CODE1B: ;DEC DE
DEC Z_DE
SAHF
RET
CODE1C: ;INC E
INC Z_E
RET
CODE1D: ;DEC E
DEC Z_E
RET
CODE1E: ;LD E,nn
INC SI
MOV Z_E,BL
SAHF
RET
CODE1F: ;RRA
RCR Z_A,1
RET
CODE20: ;JR NZ,dd
INC SI
SAHF
JNZ RELJMP
RET
RELJMP: MOV AL,BL
CBW
ADD AX,SI
MOV SI,AX
RET
CODE21: ;LD HL,nnnn
INC SI
INC SI
MOV Z_HL,BX
SAHF
RET
CODE22: ;LD (nnnn),HL
INC SI
INC SI
SAHF
MOV AX,Z_HL
MOV ES:[BX],AX
RET
CODE23: ;INC HL
INC Z_HL
SAHF
RET
CODE24: ;INC H
INC Z_H
RET
CODE25: ;DEC H
DEC Z_H
RET
CODE26: ;LD H,nn
INC SI
MOV Z_H,BL
SAHF
RET
CODE27: ;DAA
MOV AL,Z_A
DAA
MOV Z_A,AL
RET
CODE28: ;JR Z,dd
INC SI
SAHF
JZ RELJMP
RET
CODE29: ;ADD HL,HL
PUSHF
MOV AX,Z_HL
ADD Z_HL,AX
JMP CYSAV
CODE2A: ;LD HL,(nnnn)
INC SI
INC SI
SAHF
MOV AX,ES:[BX]
MOV Z_HL,AX
RET
CODE2B: ;DEC HL
DEC Z_HL
SAHF
RET
CODE2C: ;INC L
INC Z_L
RET
CODE2D: ;DEC L
DEC Z_L
RET
CODE2E: ;LD L,nn
INC SI
MOV Z_L,BL
SAHF
RET
CODE2F: ;CPL
XOR Z_A,0FFH
RET
CODE30: ;JR NC,dd
INC SI
SAHF
JNC RELJMP
RET
RJMP2: JMPS RELJMP
CODE31: ;LD SP,nnnn
INC SI
INC SI
MOV Z_SP,BX
SAHF
RET
CODE32: ;LD (nnnn),A
INC SI
INC SI
MOV AL,Z_A
MOV ES:[BX],AL
SAHF
RET
CODE33: ;INC SP
INC Z_SP
SAHF
RET
CODE34: ;INC (HL)
MOV BX,Z_HL
INC ES: BYTE PTR [BX]
RET
CODE35: ;DEC (HL)
MOV BX,Z_HL
DEC ES: BYTE PTR [BX]
RET
CODE36: ;LD (HL),nn
INC SI
MOV AL,BL
MOV BX,Z_HL
MOV ES:[BX],AL
SAHF
RET
CODE37: ;SCF
STC
RET
CODE38: ;JR C,dd
INC SI
SAHF
JC RJMP2
RET
CODE39: ;ADD HL,SP
PUSHF
MOV AX,Z_SP
ADD Z_HL,AX
JMP CYSAV
CODE3A: ;LD A,(nnnn)
INC SI
INC SI
MOV AL,ES:[BX]
MOV Z_A,AL
SAHF
RET
CODE3B: ;DEC SP
DEC Z_SP
SAHF
RET
CODE3C: ;INC A
INC Z_A
RET
CODE3D: ;DEC A
DEC Z_A
RET
CODE3E: ;LD A,nn
INC SI
MOV Z_A,BL
SAHF
RET
CODE3F: ;CCF
CMC
RET
CODE40: ;LD B,B
MOV AL,Z_B
MOV Z_B,AL
RET
CODE41: ;LD B,C
MOV AL,Z_C
MOV Z_B,AL
RET
CODE42: ;LD B,D
MOV AL,Z_D
MOV Z_B,AL
RET
CODE43: ;LD B,E
MOV AL,Z_E
MOV Z_B,AL
RET
CODE44: ;LD B,H
MOV AL,Z_H
MOV Z_B,AL
RET
CODE45: ;LD B,L
MOV AL,Z_L
MOV Z_B,AL
RET
CODE46: ;LD B,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_B,AL
RET
CODE47: ;LD B,A
MOV AL,Z_A
MOV Z_B,AL
RET
CODE48: ;LD C,B
MOV AL,Z_B
MOV Z_C,AL
RET
CODE49: ;LD C,C
MOV AL,Z_C
MOV Z_C,AL
RET
CODE4A: ;LD C,D
MOV AL,Z_D
MOV Z_C,AL
RET
CODE4B: ;LD C,E
MOV AL,Z_E
MOV Z_C,AL
RET
CODE4C: ;LD C,H
MOV AL,Z_H
MOV Z_C,AL
RET
CODE4D: ;LD C,L
MOV AL,Z_L
MOV Z_C,AL
RET
CODE4E: ;LD C,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_C,AL
RET
CODE4F: ;LD C,A
MOV AL,Z_A
MOV Z_C,AL
RET
CODE50: ;LD D,B
MOV AL,Z_B
MOV Z_D,AL
RET
CODE51: ;LD D,C
MOV AL,Z_C
MOV Z_D,AL
RET
CODE52: ;LD D,D
MOV AL,Z_D
MOV Z_D,AL
RET
CODE53: ;LD D,E
MOV AL,Z_E
MOV Z_D,AL
RET
CODE54: ;LD D,H
MOV AL,Z_H
MOV Z_D,AL
RET
CODE55: ;LD D,L
MOV AL,Z_L
MOV Z_D,AL
RET
CODE56: ;LD D,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_D,AL
RET
CODE57: ;LD D,A
MOV AL,Z_A
MOV Z_D,AL
RET
CODE58: ;LD E,B
MOV AL,Z_B
MOV Z_E,AL
RET
CODE59: ;LD E,C
MOV AL,Z_C
MOV Z_E,AL
RET
CODE5A: ;LD E,D
MOV AL,Z_D
MOV Z_E,AL
RET
CODE5B: ;LD E,E
MOV AL,Z_E
MOV Z_E,AL
RET
CODE5C: ;LD E,H
MOV AL,Z_H
MOV Z_E,AL
RET
CODE5D: ;LD E,L
MOV AL,Z_L
MOV Z_E,AL
RET
CODE5E: ;LD E,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_E,AL
RET
CODE5F: ;LD E,A
MOV AL,Z_A
MOV Z_E,AL
RET
CODE60: ;LD H,B
MOV AL,Z_B
MOV Z_H,AL
RET
CODE61: ;LD H,C
MOV AL,Z_C
MOV Z_H,AL
RET
CODE62: ;LD H,D
MOV AL,Z_D
MOV Z_H,AL
RET
CODE63: ;LD H,E
MOV AL,Z_E
MOV Z_H,AL
RET
CODE64: ;LD H,H
MOV AL,Z_H
MOV Z_H,AL
RET
CODE65: ;LD H,L
MOV AL,Z_L
MOV Z_H,AL
RET
CODE66: ;LD H,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_H,AL
RET
CODE67: ;LD H,A
MOV AL,Z_A
MOV Z_H,AL
RET
CODE68: ;LD L,B
MOV AL,Z_B
MOV Z_L,AL
RET
CODE69: ;LD L,C
MOV AL,Z_C
MOV Z_L,AL
RET
CODE6A: ;LD L,D
MOV AL,Z_D
MOV Z_L,AL
RET
CODE6B: ;LD L,E
MOV AL,Z_E
MOV Z_L,AL
RET
CODE6C: ;LD L,H
MOV AL,Z_H
MOV Z_L,AL
RET
CODE6D: ;LD L,L
MOV AL,Z_L
MOV Z_L,AL
RET
CODE6E: ;LD L,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_L,AL
RET
CODE6F: ;LD L,A
MOV AL,Z_A
MOV Z_L,AL
RET
CODE70: ;LD (HL),B
MOV BX,Z_HL
MOV AL,Z_B
MOV ES:[BX],AL
RET
CODE71: ;LD (HL),C
MOV BX,Z_HL
MOV AL,Z_C
MOV ES:[BX],AL
RET
CODE72: ;LD (HL),D
MOV BX,Z_HL
MOV AL,Z_D
MOV ES:[BX],AL
RET
CODE73: ;LD (HL),E
MOV BX,Z_HL
MOV AL,Z_E
MOV ES:[BX],AL
RET
CODE74: ;LD (HL),H
MOV BX,Z_HL
MOV AL,Z_H
MOV ES:[BX],AL
RET
CODE75: ;LD (HL),L
MOV BX,Z_HL
MOV AL,Z_L
MOV ES:[BX],AL
RET
CODE76: ;HALT
HLT
RET
CODE77: ;LD (HL),A
MOV BX,Z_HL
MOV AL,Z_A
MOV ES:[BX],AL
RET
CODE78: ;LD A,B
MOV AL,Z_B
MOV Z_A,AL
RET
CODE79: ;LD A,C
MOV AL,Z_C
MOV Z_A,AL
RET
CODE7A: ;LD A,D
MOV AL,Z_D
MOV Z_A,AL
RET
CODE7B: ;LD A,E
MOV AL,Z_E
MOV Z_A,AL
RET
CODE7C: ;LD A,H
MOV AL,Z_H
MOV Z_A,AL
RET
CODE7D: ;LD A,L
MOV AL,Z_L
MOV Z_A,AL
RET
CODE7E: ;LD A,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
MOV Z_A,AL
RET
CODE7F: ;LD A,A
MOV AL,Z_A
MOV Z_A,AL
RET
CODE80: ;ADD A,B
MOV AL,Z_B
ADD Z_A,AL
RET
CODE81: ;ADD A,C
MOV AL,Z_C
ADD Z_A,AL
RET
CODE82: ;ADD A,D
MOV AL,Z_D
ADD Z_A,AL
RET
CODE83: ;ADD A,E
MOV AL,Z_E
ADD Z_A,AL
RET
CODE84: ;ADD A,H
MOV AL,Z_H
ADD Z_A,AL
RET
CODE85: ;ADD A,L
MOV AL,Z_L
ADD Z_A,AL
RET
CODE86: ;ADD A,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
ADD Z_A,AL
RET
CODE87: ;ADD A,A
MOV AL,Z_A
ADD Z_A,AL
RET
CODE88: ;ADC A,B
MOV AL,Z_B
ADC Z_A,AL
RET
CODE89: ;ADC A,C
MOV AL,Z_C
ADC Z_A,AL
RET
CODE8A: ;ADC A,D
MOV AL,Z_D
ADC Z_A,AL
RET
CODE8B: ;ADC A,E
MOV AL,Z_E
ADC Z_A,AL
RET
CODE8C: ;ADC A,H
MOV AL,Z_H
ADC Z_A,AL
RET
CODE8D: ;ADC A,L
MOV AL,Z_L
ADC Z_A,AL
RET
CODE8E: ;ADC A,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
ADC Z_A,AL
RET
CODE8F: ;ADC A,A
MOV AL,Z_A
ADC Z_A,AL
RET
CODE90: ;SUB B
MOV AL,Z_B
SUB Z_A,AL
RET
CODE91: ;SUB C
MOV AL,Z_C
SUB Z_A,AL
RET
CODE92: ;SUB D
MOV AL,Z_D
SUB Z_A,AL
RET
CODE93: ;SUB E
MOV AL,Z_E
SUB Z_A,AL
RET
CODE94: ;SUB H
MOV AL,Z_H
SUB Z_A,AL
RET
CODE95: ;SUB L
MOV AL,Z_L
SUB Z_A,AL
RET
CODE96: ;SUB (HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
SUB Z_A,AL
RET
CODE97: ;SUB A
MOV AL,Z_A
SUB Z_A,AL
RET
CODE98: ;SBC A,B
MOV AL,Z_B
SBB Z_A,AL
RET
CODE99: ;SBC A,C
MOV AL,Z_C
SBB Z_A,AL
RET
CODE9A: ;SBC A,D
MOV AL,Z_D
SBB Z_A,AL
RET
CODE9B: ;SBC A,E
MOV AL,Z_E
SBB Z_A,AL
RET
CODE9C: ;SBC A,H
MOV AL,Z_H
SBB Z_A,AL
RET
CODE9D: ;SBC A,L
MOV AL,Z_L
SBB Z_A,AL
RET
CODE9E: ;SBC A,(HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
SBB Z_A,AL
RET
CODE9F: ;SBC A,A
MOV AL,Z_A
SBB Z_A,AL
RET
CODEA0: ;AND B
MOV AL,Z_B
AND Z_A,AL
RET
CODEA1: ;AND C
MOV AL,Z_C
AND Z_A,AL
RET
CODEA2: ;AND D
MOV AL,Z_D
AND Z_A,AL
RET
CODEA3: ;AND E
MOV AL,Z_E
AND Z_A,AL
RET
CODEA4: ;AND H
MOV AL,Z_H
AND Z_A,AL
RET
CODEA5: ;AND L
MOV AL,Z_L
AND Z_A,AL
RET
CODEA6: ;AND (HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
AND Z_A,AL
RET
CODEA7: ;AND A
MOV AL,Z_A
AND Z_A,AL
RET
CODEA8: ;XOR B
MOV AL,Z_B
XOR Z_A,AL
RET
CODEA9: ;XOR C
MOV AL,Z_C
XOR Z_A,AL
RET
CODEAA: ;XOR D
MOV AL,Z_D
XOR Z_A,AL
RET
CODEAB: ;XOR E
MOV AL,Z_E
XOR Z_A,AL
RET
CODEAC: ;XOR H
MOV AL,Z_H
XOR Z_A,AL
RET
CODEAD: ;XOR L
MOV AL,Z_L
XOR Z_A,AL
RET
CODEAE: ;XOR (HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
XOR Z_A,AL
RET
CODEAF: ;XOR A
MOV AL,Z_A
XOR Z_A,AL
RET
CODEB0: ;OR B
MOV AL,Z_B
OR Z_A,AL
RET
CODEB1: ;OR C
MOV AL,Z_C
OR Z_A,AL
RET
CODEB2: ;OR D
MOV AL,Z_D
OR Z_A,AL
RET
CODEB3: ;OR E
MOV AL,Z_E
OR Z_A,AL
RET
CODEB4: ;OR H
MOV AL,Z_H
OR Z_A,AL
RET
CODEB5: ;OR L
MOV AL,Z_L
OR Z_A,AL
RET
CODEB6: ;OR (HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
OR Z_A,AL
RET
CODEB7: ;OR A
MOV AL,Z_A
OR Z_A,AL
RET
CODEB8: ;CP B
MOV AL,Z_B
CMP Z_A,AL
RET
CODEB9: ;CP C
MOV AL,Z_C
CMP Z_A,AL
RET
CODEBA: ;CP D
MOV AL,Z_D
CMP Z_A,AL
RET
CODEBB: ;CP E
MOV AL,Z_E
CMP Z_A,AL
RET
CODEBC: ;CP H
MOV AL,Z_H
CMP Z_A,AL
RET
CODEBD: ;CP L
MOV AL,Z_L
CMP Z_A,AL
RET
CODEBE: ;CP (HL)
MOV BX,Z_HL
MOV AL,ES:[BX]
CMP Z_A,AL
RET
CODEBF: ;CP A
MOV AL,Z_A
CMP Z_A,AL
RET
CODEC0: ;RET NZ
JZ RETC0
JMP Z80_RET
RETC0: RET
CODEC1: ;POP BC
CALL Z80_POP
MOV Z_BC,AX
RET
CODEC2: ;JP NZ nnnn
INC SI
INC SI
SAHF
JZ RETC2
MOV SI,BX
RETC2: RET
CODEC3: ;JP nnnn
MOV SI,BX
RET
CODEC4: ;CALL NZ,nnnn
INC SI
INC SI
SAHF
JZ RETC4
JMP Z80_CALL
RETC4: RET
CODEC5: ;PUSH BC
MOV AX,Z_BC
CALL Z80_PUSH
RET
CODEC6: ;ADD A,nn
INC SI
ADD Z_A,BL
RET
CODEC7: ;RST 0
MOV BX,0
JMP Z80_CALL
RET
CODEC8: ;RET Z
JNZ RETC8
JMP Z80_RET
RETC8: RET
CODEC9: ;RET
JMP Z80_RET
RET
CODECA: ;JP Z,nnnn
INC SI
INC SI
SAHF
JNZ RETCA
MOV SI,BX
RETCA: RET
CODECB: ;MULTIPLE
PUSH AX
INC SI ;USED A BYTE
MOV DI,BX
AND DI,00FFH
SAL DI,1
POP AX
SAHF
MOV CX,CBTBL[DI]
JMP CX
CODECC: ;CALL Z,nnnn
INC SI
INC SI
SAHF
JNZ RETCC
JMP Z80_CALL
RETCC: RET
CODECD: ;CALL nnnn
INC SI
INC SI
SAHF
JMP Z80_CALL
RET
CODECE: ;ADC A,nn
INC SI
ADC Z_A,BL
RET
CODECF: ;RST 8
MOV BX,8
JMP Z80_CALL
RET
CODED0: ;RET NC
JC RETD0
JMP Z80_RET
RETD0: RET
CODED1: ;POP DE
CALL Z80_POP
MOV Z_DE,AX
RET
CODED2: ;JP NC,nnnn
INC SI
INC SI
SAHF
JC RETD2
MOV SI,BX
RETD2: RET
CODED3: ;OUT (nn),A
INC SI
SAHF
MOV DH,0
MOV DL,BL
MOV AL,Z_A
OUT DX,AL
RET
CODED4: ;CALL NC,nnnn
INC SI
INC SI
SAHF
JC RETD4
JMP Z80_CALL
RETD4: RET
CODED5: ;PUSH DE
MOV AX,Z_DE
CALL Z80_PUSH
RET
CODED6: ;SUB nn
INC SI
SUB Z_A,BL
RET
CODED7: ;RST 10
MOV BX,010H
JMP Z80_CALL
RET
CODED8: ;RET C
JNC RETD8
JMP Z80_RET
RETD8: RET
CODED9: ;EXX
PUSH DS
PUSH ES
POP DS
PUSH SI
PUSH DI
PUSH CX
MOV SI,Z_BC
MOV DI,Z_TEMP
MOV CX,3
REP MOVSW
MOV SI,Z_ALTR
MOV DI,Z_BC
MOV CX,3
REP MOVSW
MOV SI,Z_TEMP
MOV DI,Z_ALTR
MOV CX,3
REP MOVSW
POP CX
POP DI
POP SI
POP DS
RET
CODEDA: ;JP C,nnnn
INC SI
INC SI
SAHF
JNC RETDA
MOV SI,BX
RETDA: RET
CODEDB: ;IN A,(nn)
INC SI
SAHF
MOV DH,0
MOV DL,BL
IN AL,DX
MOV Z_A,AL
RET
CODEDC: ;CALL C,nnnn
INC SI
INC SI
SAHF
JNC RETDC
JMP Z80_CALL
RETDC: RET
CODEDD: ;MULTIPLE
JMP Z80_NFG
CODEDE: ;SBC A,nn
INC SI
SBB Z_A,BL
RET
CODEDF: ;RST 18
MOV BX,018H
JMP Z80_CALL
RET
CODEE0: ;RET PO
JPE RETE0
JMP Z80_RET
RETE0: RET
CODEE1: ;POP HL
CALL Z80_POP
MOV Z_HL,AX
RET
CODEE2: ;JP PO,nnnn
INC SI
INC SI
SAHF
JPE RETE2
MOV SI,BX
RETE2: RET
CODEE3: ;EX (SP),HL
MOV AX,Z_HL
MOV BX,Z_SP
XCHG AX,ES:[BX]
MOV Z_HL,AX
RET
CODEE4: ;CALL PO,nnnn
INC SI
INC SI
SAHF
JPE RETE4
JMP Z80_CALL
RETE4: RET
CODEE5: ;PUSH HL
MOV AX,Z_HL
CALL Z80_PUSH
RET
CODEE6: ;AND nn
INC SI
AND Z_A,BL
RET
CODEE7: ;RST 20
MOV BX,020H
JMP Z80_CALL
RET
CODEE8: ;RET PE
JPO RETE8
JMP Z80_RET
RETE8: RET
CODEE9: ;JP (HL)
MOV SI,Z_HL
RET
CODEEA: ;JP PE nnnn
INC SI
INC SI
SAHF
JPO RETEA
MOV SI,BX
RETEA: RET
CODEEB: ;EX DE,HL
MOV AX,Z_HL
XCHG AX,Z_DE
MOV Z_HL,AX
RET
CODEEC: ;CALL PE,nnnn
INC SI
INC SI
SAHF
JPO RETEC
JMP Z80_CALL
RETEC: RET
CODEED: ;MULTIPLE
PUSH AX
INC SI ;USED A BYTE
MOV AX,BX
AND AX,007FH ;SMALLER MAP
SUB AX,32
ADD AX,AX
MOV DI,AX
POP AX
SAHF
MOV CX,EDTBL[DI]
JMP CX
CODEEE: ;XOR nn
INC SI
XOR Z_A,BL
RET
CODEEF: ;RST 28
MOV BX,028H
JMP Z80_CALL
RET
CODEF0: ;RET P
JS RETF0
JMP Z80_RET
RETF0: RET
CODEF1: ;POP AF
CALL Z80_POP
MOV Z_A,AL
SAHF
RET
CODEF2: ;JP P,nnnn
INC SI
INC SI
SAHF
JS RETF2
MOV SI,BX
RETF2: RET
CODEF3: ;DI
CLI
RET
CODEF4: ;CALL P,nnnn
INC SI
INC SI
SAHF
JS RETF4
JMP Z80_CALL
RETF4: RET
CODEF5: ;PUSH AF
LAHF
MOV AL,Z_A
CALL Z80_PUSH
RET
CODEF6: ;OR nn
INC SI
OR Z_A,BL
RET
CODEF7: ;RST 30
MOV BX,030H
JMP Z80_CALL
RET
CODEF8: ;RET M
JNS RETF8
JMP Z80_RET
RETF8: RET
CODEF9: ;LD SP,HL
MOV AX,Z_HL
MOV Z_SP,AX
RET
CODEFA: ;JP M,nnnn
INC SI
INC SI
SAHF
JNS RETFA
MOV SI,BX
RETFA: RET
CODEFB: ;EI
STI
RET
CODEFC: ;CALL M,nnnn
INC SI
INC SI
SAHF
JNS RETFC
JMP Z80_CALL
RETFC: RET
CODEFD: ;MULTIPLE
JMP Z80_NFG
CODEFE: ;CP nn
INC SI
CMP Z_A,BL
RET
CODEFF: ;RST 38
MOV BX,038H
JMP Z80_CALL
RET
Z80_PUSH:
PUSH BX
PUSHF
DEC Z_SP
DEC Z_SP
MOV BX,Z_SP
MOV ES:[BX],AX
POPF
POP BX
RET
Z80_POP:
PUSH BX
PUSHF
MOV BX,Z_SP
MOV AX,ES:[BX]
INC Z_SP
INC Z_SP
POPF
POP BX
RET
Z80_CALL:
MOV AX,SI
CALL Z80_PUSH
MOV SI,BX
RET
Z80_RET:
CALL Z80_POP
MOV SI,AX
RET
Z80_NFG: ;Z80 ONLY OP CODE DETECTED
MOV DX,OFFSET MSG_Z80_OP
CALL PRINT
MOV SI,0FFFFH ;TERMINATE ON NEXT INSTRUCTION
RET
