// license:BSD-3-Clause // copyright-holders:Ernesto Corvi /******************************************************************************* mb88dasm.c Core implementation for the portable Fujitsu MB88xx series MCU disassembler. Written by Ernesto Corvi *******************************************************************************/ #include "emu.h" #include "mb88dasm.h" u32 mb88_disassembler::opcode_alignment() const { return 1; } offs_t mb88_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms) { unsigned startpc = pc; uint8_t op = opcodes.r8(pc++); uint8_t arg = opcodes.r8(pc); switch( op ) { case 0x00: util::stream_format( stream, "nop" ); break; case 0x01: util::stream_format( stream, "outO (PortO<=A)" ); break; case 0x02: util::stream_format( stream, "outP" ); break; case 0x03: util::stream_format( stream, "outR (PortR[Y]<=A)" ); break; case 0x04: util::stream_format( stream, "tay (Y<=A)" ); break; case 0x05: util::stream_format( stream, "tath (TH<=A)" ); break; case 0x06: util::stream_format( stream, "tatl (TL<=A)" ); break; case 0x07: util::stream_format( stream, "tas (SB<=A)" ); break; case 0x08: util::stream_format( stream, "icy (Y++)" ); break; case 0x09: util::stream_format( stream, "icm (M[X,Y]++)" ); break; case 0x0A: util::stream_format( stream, "stic (M[X,Y]<=A; Y++)" ); break; case 0x0B: util::stream_format( stream, "x (A<=>M[X,Y])" ); break; case 0x0C: util::stream_format( stream, "rol" ); break; case 0x0D: util::stream_format( stream, "load (A<=M[X,Y])" ); break; case 0x0E: util::stream_format( stream, "adc (A<=A+M[X,Y]+cf)" ); break; case 0x0F: util::stream_format( stream, "and (A<=A & M[X,Y])" ); break; case 0x10: util::stream_format( stream, "daa (A<=A+6 if (A>9 | cf=1)" ); break; case 0x11: util::stream_format( stream, "das (A<=A+10 if (A>9 | cf=1)" ); break; case 0x12: util::stream_format( stream, "inK (A<=PortK)" ); break; case 0x13: util::stream_format( stream, "inR (A<=PortR[Y])" ); break; case 0x14: util::stream_format( stream, "tya (A<=Y)" ); break; case 0x15: util::stream_format( stream, "ttha (A<=TH)" ); break; case 0x16: util::stream_format( stream, "ttla (A<=TL)" ); break; case 0x17: util::stream_format( stream, "tsa (A<=S)" ); break; case 0x18: util::stream_format( stream, "dcy (Y--)" ); break; case 0x19: util::stream_format( stream, "dcm (M[X,Y]--)" ); break; case 0x1A: util::stream_format( stream, "stdc (M[X,Y]<=A; Y--)" ); break; case 0x1B: util::stream_format( stream, "xx (A<=>X)" ); break; case 0x1C: util::stream_format( stream, "ror" ); break; case 0x1D: util::stream_format( stream, "store (M[X,Y]<=A)" ); break; case 0x1E: util::stream_format( stream, "sbc (A<=M[X,Y]-A-cf)" ); break; case 0x1F: util::stream_format( stream, "or (A<=A | M[X,Y])" ); break; case 0x20: util::stream_format( stream, "setR (PortR bit[Y]<=1)" ); break; case 0x21: util::stream_format( stream, "setc (cf<=1)" ); break; case 0x22: util::stream_format( stream, "rstR (PortR bit[Y]<=0)" ); break; case 0x23: util::stream_format( stream, "rstc (cf<=0)" ); break; case 0x24: util::stream_format( stream, "tstR (st<=PortR bit[Y])" ); break; case 0x25: util::stream_format( stream, "tsti (st<=IRQ Line)" ); break; case 0x26: util::stream_format( stream, "tstv (st<=vf)" ); break; case 0x27: util::stream_format( stream, "tsts (st<=sf)" ); break; case 0x28: util::stream_format( stream, "tstc (st<=cf)" ); break; case 0x29: util::stream_format( stream, "tstz (st<=zf)" ); break; case 0x2A: util::stream_format( stream, "sts (M[X,Y]<=SB)" ); break; case 0x2B: util::stream_format( stream, "ls (SB<=M[X,Y])" ); break; case 0x2C: util::stream_format( stream, "rts" ); break; case 0x2D: util::stream_format( stream, "neg (A=-A)" ); break; case 0x2E: util::stream_format( stream, "c (A==M[X,Y])" ); break; case 0x2F: util::stream_format( stream, "eor (A ^ M[X,Y])" ); break; case 0x30: case 0x31: case 0x32: case 0x33: util::stream_format( stream, "sbit%d (M[X,Y] bit%d=1)", op&3, op&3 ); break; case 0x34: case 0x35: case 0x36: case 0x37: util::stream_format( stream, "rbit%d (M[X,Y] bit%d=0)", op&3, op&3 ); break; case 0x38: case 0x39: case 0x3A: case 0x3B: util::stream_format( stream, "tbit%d (M[X,Y] bit%d == 1)", op&3, op&3 ); break; case 0x3C: util::stream_format( stream, "rti" ); break; case 0x3D: util::stream_format( stream, "jpa #$%02x (jump always)", arg ); pc++; break; case 0x3E: util::stream_format( stream, "en #$%02x (enable bits)", arg ); pc++; break; case 0x3F: util::stream_format( stream, "dis #$%02x (disable bits)", arg ); pc++; break; case 0x40: case 0x41: case 0x42: case 0x43: util::stream_format( stream, "setd%d (PortR bit%d<=1)", op&3, op&3 ); break; case 0x44: case 0x45: case 0x46: case 0x47: util::stream_format( stream, "rstd%d (PortR bit%d<=0)", op&3, op&3 ); break; case 0x48: case 0x49: case 0x4A: case 0x4B: util::stream_format( stream, "tstd%d (PortR bit%d == 1)", (op&3)+8, (op&3)+8 ); break; case 0x4C: case 0x4D: case 0x4E: case 0x4F: util::stream_format( stream, "tba%d (A bit%d == 1)", op&3, op&3 ); break; case 0x50: case 0x51: case 0x52: case 0x53: util::stream_format( stream, "xd%d (A<=>M[0,%d])", op&3, op&3 ); break; case 0x54: case 0x55: case 0x56: case 0x57: util::stream_format( stream, "xyd%d (Y<=>M[0,%d])", (op&3)+4, (op&3)+4 ); break; case 0x58: case 0x59: case 0x5A: case 0x5B: case 0x5C: case 0x5D: case 0x5E: case 0x5F: util::stream_format( stream, "lxi #$%1x (X<=$%1x)", op&7, op&7 ); break; case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x65: case 0x66: case 0x67: util::stream_format( stream, "call %02x%02x (call if st=1)", op&7, arg ); pc++; break; case 0x68: case 0x69: case 0x6A: case 0x6B: case 0x6C: case 0x6D: case 0x6E: case 0x6F: util::stream_format( stream, "jpl %02x%02x (jump if st=1)", op&7, arg ); pc++; break; case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x75: case 0x76: case 0x77: case 0x78: case 0x79: case 0x7A: case 0x7B: case 0x7C: case 0x7D: case 0x7E: case 0x7F: util::stream_format( stream, "ai #$%1x (A<=A+$%1x)", op&0xf, op&0xf ); break; case 0x80: case 0x81: case 0x82: case 0x83: case 0x84: case 0x85: case 0x86: case 0x87: case 0x88: case 0x89: case 0x8A: case 0x8B: case 0x8C: case 0x8D: case 0x8E: case 0x8F: util::stream_format( stream, "lyi #$%1x (Y<=$%1x)", op&0xf, op&0xf ); break; case 0x90: case 0x91: case 0x92: case 0x93: case 0x94: case 0x95: case 0x96: case 0x97: case 0x98: case 0x99: case 0x9A: case 0x9B: case 0x9C: case 0x9D: case 0x9E: case 0x9F: util::stream_format( stream, "li #$%1x (A<=$%1x)", op&0xf, op&0xf ); break; case 0xA0: case 0xA1: case 0xA2: case 0xA3: case 0xA4: case 0xA5: case 0xA6: case 0xA7: case 0xA8: case 0xA9: case 0xAA: case 0xAB: case 0xAC: case 0xAD: case 0xAE: case 0xAF: util::stream_format( stream, "cyi #$%1x (Y==$%1x)", op&0xf, op&0xf ); break; case 0xB0: case 0xB1: case 0xB2: case 0xB3: case 0xB4: case 0xB5: case 0xB6: case 0xB7: case 0xB8: case 0xB9: case 0xBA: case 0xBB: case 0xBC: case 0xBD: case 0xBE: case 0xBF: util::stream_format( stream, "ci #$%1x (A==$%1x)", op&0xf, op&0xf ); break; default: /* C0-FF */ util::stream_format( stream, "jmp $%04x (jump if st=1)", (pc&(~0x3f))+ op-0xC0 ); break; } return (pc - startpc) | SUPPORTED; }