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disassembler.py
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disassembler.py
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OPCODES = {
# OPCODE: [INSTRUCTION, SIZE]
0x00: ['NOP', 1],
0x01: ['LXI B,%02x%02x', 3],
0x02: ['STAX B', 1],
0x03: ['INX B', 1],
0x04: ['INR B', 1],
0x05: ['DCR B', 1],
0x06: ['MVI B,%02x', 2],
0x07: ['RLC', 1],
0x08: ['NOP*', 1],
0x09: ['DAD B', 1],
0x0A: ['LDAX B', 1],
0x0B: ['DCX B', 1],
0x0C: ['INR C', 1],
0x0D: ['DCR C', 1],
0x0E: ['MVI C,%02x', 2],
0x0F: ['RRC', 1],
0x10: ['NOP*', 1],
0x11: ['LXI D,%02x%02x', 3],
0x12: ['STAX D', 1],
0x13: ['INX D', 1],
0x14: ['INR D', 1],
0x15: ['DCR D', 1],
0x16: ['MVI D,%02x', 2],
0x17: ['RAL', 1],
0x18: ['NOP*', 1],
0x19: ['DAD D', 1],
0x1A: ['LDAX D', 1],
0x1B: ['DCX D', 1],
0x1C: ['INR E', 1],
0x1D: ['DCR E', 1],
0x1E: ['MVI E,%02x', 2],
0x1F: ['RAR', 1],
0x20: ['NOP*', 1],
0x21: ['LXI H,%02x%02x', 3],
0x22: ['SHLD %02x%02x', 3],
0x23: ['INX H', 1],
0x24: ['INR H', 1],
0x25: ['DCR H', 1],
0x26: ['MVI H,%02x', 2],
0x27: ['DAA', 1],
0x28: ['NOP*', 1],
0x29: ['DAD H', 1],
0x2A: ['LHLD %02x%02x', 3],
0x2B: ['DCX H', 1],
0x2C: ['INR L', 1],
0x2D: ['DCR L', 1],
0x2E: ['MVI L,%02x', 2],
0x2F: ['CMA', 1],
0x30: ['NOP*', 1],
0x31: ['LXI SP,%02x%02x', 3],
0x32: ['STA %02x%02x', 3],
0x33: ['INX SP', 1],
0x34: ['INR M', 1],
0x35: ['DCR M', 1],
0x36: ['MVI M,%02x', 2],
0x37: ['STC', 1],
0x38: ['NOP*', 1],
0x39: ['DAD SP', 1],
0x3A: ['LDA %02x%02x', 3],
0x3B: ['DCX SP', 1],
0x3C: ['INR A', 1],
0x3D: ['DCR A', 1],
0x3E: ['MVI A,%02x', 2],
0x3F: ['CMC', 1],
0x40: ['MOV B,B', 1],
0x41: ['MOV B,C', 1],
0x42: ['MOV B,D', 1],
0x43: ['MOV B,E', 1],
0x44: ['MOV B,H', 1],
0x45: ['MOV B,L', 1],
0x46: ['MOV B,M', 1],
0x47: ['MOV B,A', 1],
0x48: ['MOV C,B', 1],
0x49: ['MOV C,C', 1],
0x4A: ['MOV C,D', 1],
0x4B: ['MOV C,E', 1],
0x4C: ['MOV C,H', 1],
0x4D: ['MOV C,L', 1],
0x4E: ['MOV C,M', 1],
0x4F: ['MOV C,A', 1],
0x50: ['MOV D,B', 1],
0x51: ['MOV D,C', 1],
0x52: ['MOV D,D', 1],
0x53: ['MOV D,E', 1],
0x54: ['MOV D,H', 1],
0x55: ['MOV D,L', 1],
0x56: ['MOV D,M', 1],
0x57: ['MOV D,A', 1],
0x58: ['MOV E,B', 1],
0x59: ['MOV E,C', 1],
0x5A: ['MOV E,D', 1],
0x5B: ['MOV E,E', 1],
0x5C: ['MOV E,H', 1],
0x5D: ['MOV E,L', 1],
0x5E: ['MOV E,M', 1],
0x5F: ['MOV E,A', 1],
0x60: ['MOV H,B', 1],
0x61: ['MOV H,C', 1],
0x62: ['MOV H,D', 1],
0x63: ['MOV H,E', 1],
0x64: ['MOV H,H', 1],
0x65: ['MOV H,L', 1],
0x66: ['MOV H,M', 1],
0x67: ['MOV H,A', 1],
0x68: ['MOV L,B', 1],
0x69: ['MOV L,C', 1],
0x6A: ['MOV L,D', 1],
0x6B: ['MOV L,E', 1],
0x6C: ['MOV L,H', 1],
0x6D: ['MOV L,L', 1],
0x6E: ['MOV L,M', 1],
0x6F: ['MOV L,A', 1],
0x70: ['MOV M,B', 1],
0x71: ['MOV M,C', 1],
0x72: ['MOV M,D', 1],
0x73: ['MOV M,E', 1],
0x74: ['MOV M,H', 1],
0x75: ['MOV M,L', 1],
0x76: ['HLT', 1],
0x77: ['MOV M,A', 1],
0x78: ['MOV A,B', 1],
0x79: ['MOV A,C', 1],
0x7A: ['MOV A,D', 1],
0x7B: ['MOV A,E', 1],
0x7C: ['MOV A,H', 1],
0x7D: ['MOV A,L', 1],
0x7E: ['MOV A,M', 1],
0x7F: ['MOV A,A', 1],
0x80: ['ADD B', 1],
0x81: ['ADD C', 1],
0x82: ['ADD D', 1],
0x83: ['ADD E', 1],
0x84: ['ADD H', 1],
0x85: ['ADD L', 1],
0x86: ['ADD M', 1],
0x87: ['ADD A', 1],
0x88: ['ADC B', 1],
0x89: ['ADC C', 1],
0x8A: ['ADC D', 1],
0x8B: ['ADC E', 1],
0x8C: ['ADC H', 1],
0x8D: ['ADC L', 1],
0x8E: ['ADC M', 1],
0x8F: ['ADC A', 1],
0x90: ['SUB B', 1],
0x91: ['SUB C', 1],
0x92: ['SUB D', 1],
0x93: ['SUB E', 1],
0x94: ['SUB H', 1],
0x95: ['SUB L', 1],
0x96: ['SUB M', 1],
0x97: ['SUB A', 1],
0x98: ['SBB B', 1],
0x99: ['SBB C', 1],
0x9A: ['SBB D', 1],
0x9B: ['SBB E', 1],
0x9C: ['SBB H', 1],
0x9D: ['SBB L', 1],
0x9E: ['SBB M', 1],
0x9F: ['SBB A', 1],
0xA0: ['ANA B', 1],
0xA1: ['ANA C', 1],
0xA2: ['ANA D', 1],
0xA3: ['ANA E', 1],
0xA4: ['ANA H', 1],
0xA5: ['ANA L', 1],
0xA6: ['ANA M', 1],
0xA7: ['ANA A', 1],
0xA8: ['XRA B', 1],
0xA9: ['XRA C', 1],
0xAA: ['XRA D', 1],
0xAB: ['XRA E', 1],
0xAC: ['XRA H', 1],
0xAD: ['XRA L', 1],
0xAE: ['XRA M', 1],
0xAF: ['XRA A', 1],
0xB0: ['ORA B', 1],
0xB1: ['ORA C', 1],
0xB2: ['ORA D', 1],
0xB3: ['ORA E', 1],
0xB4: ['ORA H', 1],
0xB5: ['ORA L', 1],
0xB6: ['ORA M', 1],
0xB7: ['ORA A', 1],
0xB8: ['CMP B', 1],
0xB9: ['CMP C', 1],
0xBA: ['CMP D', 1],
0xBB: ['CMP E', 1],
0xBC: ['CMP H', 1],
0xBD: ['CMP L', 1],
0xBE: ['CMP M', 1],
0xBF: ['CMP A', 1],
0xC0: ['RNZ', 1],
0xC1: ['POP B', 1],
0xC2: ['JNZ %02x%02x', 3],
0xC3: ['JMP %02x%02x', 3],
0xC4: ['CNZ %02x%02x', 3],
0xC5: ['PUSH B', 1],
0xC6: ['ADI %02x', 2],
0xC7: ['RST 0', 1],
0xC8: ['RZ', 1],
0xC9: ['RET', 1],
0xCA: ['JZ %02x%02x', 3],
0xCB: ['JMP* %02x%02x', 3],
0xCC: ['CZ %02x%02x', 3],
0xCD: ['CALL %02x%02x', 3],
0xCE: ['ACI %02x', 2],
0xCF: ['RST 1', 1],
0xD0: ['RNC', 1],
0xD1: ['POP D', 1],
0xD2: ['JNC %02x%02x', 3],
0xD3: ['OUT %02x', 2],
0xD4: ['CNC %02x%02x', 3],
0xD5: ['PUSH D', 1],
0xD6: ['SUI %02x', 2],
0xD7: ['RST 2'],
0xD8: ['RC', 1],
0xD9: ['RET*', 1],
0xDA: ['JC %02x%02x', 3],
0xDB: ['IN %02x', 2],
0xDC: ['CC %02x%02x', 3],
0xDD: ['CALL* %02x%02x', 3],
0xDE: ['SBI %02x', 2],
0xDF: ['RST 3', 1],
0xE0: ['RPO', 1],
0xE1: ['POP H', 1],
0xE2: ['JPO %02x%02x', 3],
0xE3: ['XTHL', 1],
0xE4: ['CPO %02x%02x', 3],
0xE5: ['PUSH H', 1],
0xE6: ['ANI %02x', 2],
0xE7: ['RST 4', 1],
0xE8: ['RPE', 1],
0xE9: ['PCHL', 1],
0xEA: ['JPE %02x%02x', 3],
0xEB: ['XCHG', 1],
0xEC: ['CPE %02x%02x', 3],
0xED: ['CALL* %02x%02x', 3],
0xEE: ['XRI %02x', 2],
0xEF: ['RST 5', 1],
0xF0: ['RP', 1],
0xF1: ['POP PSW', 1],
0xF2: ['JP %02x%02x', 3],
0xF3: ['DI', 1],
0xF4: ['CP %02x%02x', 3],
0xF5: ['PUSH PSW', 1],
0xF6: ['ORI %02x', 2],
0xF7: ['RST 6', 1],
0xF8: ['RM', 1],
0xF9: ['SPHL', 1],
0xFA: ['JM %02x%02x', 3],
0xFB: ['EI', 1],
0xFC: ['CM %02x%02x', 3],
0xFD: ['CALL* %02x%02x', 3],
0xFE: ['CPI %02x', 2],
0xFF: ['RST 7', 1],
}
def disassemble(codebuffer, pc):
asm, opbytes = OPCODES[codebuffer[pc]]
if opbytes == 3:
print("%04x " % pc + asm % (codebuffer[pc + 2], codebuffer[pc + 1]))
elif opbytes == 2:
print("%04x " % pc + asm % (codebuffer[pc + 1]))
else:
print("%04x " % pc + asm)
return opbytes
def main():
pc = 0
# MMAP
# $0000-$07FF: .h
# $0800-$0FFF: .g
# $1000-$17FF: .f
# $1800-$1FFF: .e
# $2000-$23FF: work RAM
# $2400-$3FFF: video RAM
# $4000- : RAM mirror
with open('TEST.COM', 'rb') as f:
buffer = f.read()
while pc < len(buffer):
pc += disassemble(buffer, pc)
return 0
if __name__ == '__main__':
main()