/******************************************************************************* mb88dasm.c Core implementation for the portable Fujitsu MB88xx series MCU disassembler. Written by Ernesto Corvi *******************************************************************************/ #include "mb88xx.h" offs_t mb88_dasm(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram) { unsigned startpc = pc; UINT8 op = oprom[pc++ - startpc]; UINT8 arg = oprom[pc - startpc]; switch( op ) { case 0x00: sprintf( buffer, "nop" ); break; case 0x01: sprintf( buffer, "outO (PortO<=A)" ); break; case 0x02: sprintf( buffer, "outP" ); break; case 0x03: sprintf( buffer, "outR (PortR[Y]<=A)" ); break; case 0x04: sprintf( buffer, "tay (Y<=A)" ); break; case 0x05: sprintf( buffer, "tath (TH<=A)" ); break; case 0x06: sprintf( buffer, "tatl (TL<=A)" ); break; case 0x07: sprintf( buffer, "tas (SB<=A)" ); break; case 0x08: sprintf( buffer, "icy (Y++)" ); break; case 0x09: sprintf( buffer, "icm (M[X,Y]++)" ); break; case 0x0A: sprintf( buffer, "stic (M[X,Y]<=A; Y++)" ); break; case 0x0B: sprintf( buffer, "x (A<=>M[X,Y])" ); break; case 0x0C: sprintf( buffer, "rol" ); break; case 0x0D: sprintf( buffer, "load (A<=M[X,Y])" ); break; case 0x0E: sprintf( buffer, "adc (A<=A+M[X,Y]+cf)" ); break; case 0x0F: sprintf( buffer, "and (A<=A & M[X,Y])" ); break; case 0x10: sprintf( buffer, "daa (A<=A+6 if (A>9 | cf=1)" ); break; case 0x11: sprintf( buffer, "das (A<=A+10 if (A>9 | cf=1)" ); break; case 0x12: sprintf( buffer, "inK (A<=PortK)" ); break; case 0x13: sprintf( buffer, "inR (A<=PortR[Y])" ); break; case 0x14: sprintf( buffer, "tya (A<=Y)" ); break; case 0x15: sprintf( buffer, "ttha (A<=TH)" ); break; case 0x16: sprintf( buffer, "ttla (A<=TL)" ); break; case 0x17: sprintf( buffer, "tsa (A<=S)" ); break; case 0x18: sprintf( buffer, "dcy (Y--)" ); break; case 0x19: sprintf( buffer, "dcm (M[X,Y]--)" ); break; case 0x1A: sprintf( buffer, "stdc (M[X,Y]<=A; Y--)" ); break; case 0x1B: sprintf( buffer, "xx (A<=>X)" ); break; case 0x1C: sprintf( buffer, "ror" ); break; case 0x1D: sprintf( buffer, "store (M[X,Y]<=A)" ); break; case 0x1E: sprintf( buffer, "sbc (A<=M[X,Y]-A-cf)" ); break; case 0x1F: sprintf( buffer, "or (A<=A | M[X,Y])" ); break; case 0x20: sprintf( buffer, "setR (PortR bit[Y]<=1)" ); break; case 0x21: sprintf( buffer, "setc (cf<=1)" ); break; case 0x22: sprintf( buffer, "rstR (PortR bit[Y]<=0)" ); break; case 0x23: sprintf( buffer, "rstc (cf<=0)" ); break; case 0x24: sprintf( buffer, "tstR (st<=PortR bit[Y])" ); break; case 0x25: sprintf( buffer, "tsti (st<=IRQ Line)" ); break; case 0x26: sprintf( buffer, "tstv (st<=vf)" ); break; case 0x27: sprintf( buffer, "tsts (st<=sf)" ); break; case 0x28: sprintf( buffer, "tstc (st<=cf)" ); break; case 0x29: sprintf( buffer, "tstz (st<=zf)" ); break; case 0x2A: sprintf( buffer, "sts (M[X,Y]<=SB)" ); break; case 0x2B: sprintf( buffer, "ls (SB<=M[X,Y])" ); break; case 0x2C: sprintf( buffer, "rts" ); break; case 0x2D: sprintf( buffer, "neg (A=-A)" ); break; case 0x2E: sprintf( buffer, "c (A==M[X,Y])" ); break; case 0x2F: sprintf( buffer, "eor (A ^ M[X,Y])" ); break; case 0x30: case 0x31: case 0x32: case 0x33: sprintf( buffer, "sbit%d (M[X,Y] bit%d=1)", op&3, op&3 ); break; case 0x34: case 0x35: case 0x36: case 0x37: sprintf( buffer, "rbit%d (M[X,Y] bit%d=0)", op&3, op&3 ); break; case 0x38: case 0x39: case 0x3A: case 0x3B: sprintf( buffer, "tbit%d (M[X,Y] bit%d == 1)", op&3, op&3 ); break; case 0x3C: sprintf( buffer, "rti" ); break; case 0x3D: sprintf( buffer, "jpa #$%02x (jump always)", arg ); pc++; break; case 0x3E: sprintf( buffer, "en #$%02x (enable bits)", arg ); pc++; break; case 0x3F: sprintf( buffer, "dis #$%02x (disable bits)", arg ); pc++; break; case 0x40: case 0x41: case 0x42: case 0x43: sprintf( buffer, "setd%d (PortR bit%d<=1)", op&3, op&3 ); break; case 0x44: case 0x45: case 0x46: case 0x47: sprintf( buffer, "rstd%d (PortR bit%d<=0)", op&3, op&3 ); break; case 0x48: case 0x49: case 0x4A: case 0x4B: sprintf( buffer, "tstd%d (PortR bit%d == 1)", (op&3)+8, (op&3)+8 ); break; case 0x4C: case 0x4D: case 0x4E: case 0x4F: sprintf( buffer, "tba%d (A bit%d == 1)", op&3, op&3 ); break; case 0x50: case 0x51: case 0x52: case 0x53: sprintf( buffer, "xd%d (A<=>M[0,%d])", op&3, op&3 ); break; case 0x54: case 0x55: case 0x56: case 0x57: sprintf( buffer, "xyd%d (Y<=>M[0,%d])", (op&3)+4, (op&3)+4 ); break; case 0x58: case 0x59: case 0x5A: case 0x5B: case 0x5C: case 0x5D: case 0x5E: case 0x5F: sprintf( buffer, "lxi #$%1x (X<=$%1x)", op&7, op&7 ); break; case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x65: case 0x66: case 0x67: sprintf( buffer, "call %02x%02x (call if st=1)", op&7, arg ); pc++; break; case 0x68: case 0x69: case 0x6A: case 0x6B: case 0x6C: case 0x6D: case 0x6E: case 0x6F: sprintf( buffer, "jpl %02x%02x (jump if st=1)", op&7, arg ); pc++; break; case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x75: case 0x76: case 0x77: case 0x78: case 0x79: case 0x7A: case 0x7B: case 0x7C: case 0x7D: case 0x7E: case 0x7F: sprintf( buffer, "ai #$%1x (A<=A+$%1x)", op&0xf, op&0xf ); break; case 0x80: case 0x81: case 0x82: case 0x83: case 0x84: case 0x85: case 0x86: case 0x87: case 0x88: case 0x89: case 0x8A: case 0x8B: case 0x8C: case 0x8D: case 0x8E: case 0x8F: sprintf( buffer, "lyi #$%1x (Y<=$%1x)", op&0xf, op&0xf ); break; case 0x90: case 0x91: case 0x92: case 0x93: case 0x94: case 0x95: case 0x96: case 0x97: case 0x98: case 0x99: case 0x9A: case 0x9B: case 0x9C: case 0x9D: case 0x9E: case 0x9F: sprintf( buffer, "li #$%1x (A<=$%1x)", op&0xf, op&0xf ); break; case 0xA0: case 0xA1: case 0xA2: case 0xA3: case 0xA4: case 0xA5: case 0xA6: case 0xA7: case 0xA8: case 0xA9: case 0xAA: case 0xAB: case 0xAC: case 0xAD: case 0xAE: case 0xAF: sprintf( buffer, "cyi #$%1x (Y==$%1x)", op&0xf, op&0xf ); break; case 0xB0: case 0xB1: case 0xB2: case 0xB3: case 0xB4: case 0xB5: case 0xB6: case 0xB7: case 0xB8: case 0xB9: case 0xBA: case 0xBB: case 0xBC: case 0xBD: case 0xBE: case 0xBF: sprintf( buffer, "ci #$%1x (A==$%1x)", op&0xf, op&0xf ); break; default: /* C0-FF */ sprintf( buffer, "jmp $%04x (jump if st=1)", (pc&(~0x3f))+ op-0xC0 ); break; } return (pc - startpc) | DASMFLAG_SUPPORTED; }