static int m6509_get_argword(int addr)
{
if ((addr&0xffff)==0xffff)
return cpu_readop_arg(addr)+(cpu_readop_arg(addr&~0xffff) << 8);
else
return cpu_readop_arg(addr)+(cpu_readop_arg(addr+1) << 8);
}
static UINT16 ARG16(void)
{
UINT16 w;
w = cpu_readop_arg(I.PC.d);
I.PC.w.l++;
w += cpu_readop_arg(I.PC.d) << 8;
I.PC.w.l++;
return w;
}
unsigned DasmF8(char *buffer, unsigned pc)
{
UINT8 op = cpu_readop(pc);
UINT16 ea;
unsigned size = 1;
const char *sym, *sym2;
switch( op )
{
/* opcode bitmask */
case 0x00: /* 0000 0000 */
sym = set_ea_info( 0, 12, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,KU");
break;
case 0x01: /* 0000 0001 */
sym = set_ea_info( 0, 13, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,KL");
break;
case 0x02: /* 0000 0010 */
sym = set_ea_info( 0, 14, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,QU");
break;
case 0x03: /* 0000 0011 */
sym = set_ea_info( 0, 15, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,QL");
break;
case 0x04: /* 0000 0100 */
sym = set_ea_info( 0, 12, EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR KU,A");
break;
case 0x05: /* 0000 0101 */
sym = set_ea_info( 0, 13, EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR KL,A");
break;
case 0x06: /* 0000 0110 */
sym = set_ea_info( 0, 14, EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR QU,A");
break;
case 0x07: /* 0000 0111 */
sym = set_ea_info( 0, 15, EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR QL,A");
break;
case 0x08: /* 0000 1000 */
sym = set_ea_info( 0, 12, EA_UINT16, EA_ZPG_WR );
sprintf(buffer, "LR K,P");
break;
case 0x09: /* 0000 1001 */
sym = set_ea_info( 0, 12, EA_UINT16, EA_ZPG_RD );
sprintf(buffer, "LR P,K");
break;
case 0x0a: /* 0000 1010 */
sprintf(buffer, "LR A,IS");
break;
case 0x0b: /* 0000 1011 */
sprintf(buffer, "LR IS,A");
break;
case 0x0c: /* 0000 1100 */
sprintf(buffer, "PK") ;
break;
case 0x0d: /* 0000 1101 */
sprintf(buffer, "LR P0,Q");
sym = set_ea_info( 0, 14, EA_UINT16, EA_ZPG_RD );
break;
case 0x0e: /* 0000 1110 */
sym = set_ea_info( 0, 14, EA_UINT16, EA_ZPG_WR );
sprintf(buffer, "LR Q,DC");
break;
case 0x0f: /* 0000 1111 */
sym = set_ea_info( 0, 14, EA_UINT16, EA_ZPG_RD );
sprintf(buffer, "LR DC,Q");
break;
case 0x10: /* 0001 0000 */
sym = set_ea_info( 0, 10, EA_UINT16, EA_ZPG_RD );
sprintf(buffer, "LR DC,H");
break;
case 0x11: /* 0001 0001 */
sym = set_ea_info( 0, 10, EA_UINT16, EA_ZPG_WR );
sprintf(buffer, "LR H,DC");
break;
case 0x12: /* 0001 0010 */
sprintf(buffer, "SR 1");
break;
case 0x13: /* 0001 0011 */
sprintf(buffer, "SL 1");
break;
case 0x14: /* 0001 0100 */
sprintf(buffer, "SR 4");
break;
case 0x15: /* 0001 0101 */
sprintf(buffer, "SL 4");
break;
case 0x16: /* 0001 0110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_DC0), EA_UINT8, EA_MEM_RD );
sprintf(buffer, "LM") ;
break;
case 0x17: /* 0001 0111 */
sym = set_ea_info( 0, activecpu_get_reg(F8_DC0), EA_UINT8, EA_MEM_WR );
sprintf(buffer, "ST");
break;
case 0x18: /* 0001 1000 */
sprintf(buffer, "COM");
break;
case 0x19: /* 0001 1001 */
sprintf(buffer, "LNK");
break;
case 0x1a: /* 0001 1010 */
sprintf(buffer, "DI");
break;
case 0x1b: /* 0001 1011 */
sprintf(buffer, "EI");
break;
case 0x1c: /* 0001 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_PC1), EA_UINT16, EA_ABS_PC );
sprintf(buffer, "POP");
break;
case 0x1d: /* 0001 1101 */
sym = set_ea_info( 0, 9, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR W,J");
break;
case 0x1e: /* 0001 1110 */
sym = set_ea_info( 0, 9, EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR J,W");
break;
case 0x1f: /* 0001 1111 */
sprintf(buffer, "INC");
break;
case 0x20: /* 0010 0000 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_VALUE );
sprintf(buffer, "LI %s",sym);
break;
case 0x21: /* 0010 0001 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_VALUE );
sprintf(buffer, "NI %s",sym);
break;
case 0x22: /* 0010 0010 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_VALUE );
sprintf(buffer, "OI %s",sym);
break;
case 0x23: /* 0010 0011 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_VALUE );
sprintf(buffer, "XI %s",sym);
break;
case 0x24: /* 0010 0100 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_VALUE );
sprintf(buffer, "AI %s",sym);
break;
case 0x25: /* 0010 0101 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_VALUE );
sprintf(buffer, "CI %s",sym);
break;
case 0x26: /* 0010 0110 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_PORT_RD );
sprintf(buffer, "IN %s",sym);
break;
case 0x27: /* 0010 0111 */
size += 1;
sym = set_ea_info( 0, cpu_readop_arg(pc+1), EA_UINT8, EA_PORT_WR );
sprintf(buffer, "OUT %s",sym);
break;
case 0x28: /* 0010 1000 */
size += 2;
ea = cpu_readop_arg(pc+1) << 8;
ea |= cpu_readop_arg(pc+2);
sym = set_ea_info( 0, ea, EA_UINT16, EA_ABS_PC );
sprintf(buffer, "PI %s",sym);
break;
case 0x29: /* 0010 1001 */
size += 2;
ea = cpu_readop_arg(pc+1) << 8;
ea |= cpu_readop_arg(pc+2);
sym = set_ea_info( 0, ea, EA_UINT16, EA_ABS_PC );
sprintf(buffer, "JMP %s",sym);
break;
case 0x2a: /* 0010 1010 */
size += 2;
ea = cpu_readop_arg(pc+1) << 8;
ea |= cpu_readop_arg(pc+2);
sym = set_ea_info( 0, ea, EA_UINT16, EA_VALUE );
sprintf(buffer, "DCI %s",sym);
break;
case 0x2b: /* 0010 1011 */
sprintf(buffer, "NOP");
break;
case 0x2c: /* 0010 1100 */
sprintf(buffer, "XDC");
break;
case 0x2d: /* 0010 1101 */
case 0x2e: /* 0010 1110 */
case 0x2f: /* 0010 1111 */
sprintf(buffer, "??? $%02X",op);
break;
case 0x30: /* 0011 0000 */
case 0x31: /* 0011 0001 */
case 0x32: /* 0011 0010 */
case 0x33: /* 0011 0011 */
case 0x34: /* 0011 0100 */
case 0x35: /* 0011 0101 */
case 0x36: /* 0011 0110 */
case 0x37: /* 0011 0111 */
case 0x38: /* 0011 1000 */
case 0x39: /* 0011 1001 */
case 0x3a: /* 0011 1010 */
case 0x3b: /* 0011 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_RDWR );
sprintf(buffer, "DS %s",rname[op & 15]);
break;
case 0x3c: /* 0011 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RDWR );
sprintf(buffer, "DS (IS)");
break;
case 0x3d: /* 0011 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RDWR );
sprintf(buffer, "DS (IS++)");
break;
case 0x3e: /* 0011 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RDWR );
sprintf(buffer, "DS (IS--)");
break;
case 0x3f: /* 0011 1111 */
sprintf(buffer, "??? $%02X",op);
break;
case 0x40: /* 0100 0000 */
case 0x41: /* 0100 0001 */
case 0x42: /* 0100 0010 */
case 0x43: /* 0100 0011 */
case 0x44: /* 0100 0100 */
case 0x45: /* 0100 0101 */
case 0x46: /* 0100 0110 */
case 0x47: /* 0100 0111 */
case 0x48: /* 0100 1000 */
case 0x49: /* 0100 1001 */
case 0x4a: /* 0100 1010 */
case 0x4b: /* 0100 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,%s",rname[op & 15]);
break;
case 0x4c: /* 0100 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,(IS)");
break;
case 0x4d: /* 0100 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,(IS++)");
break;
case 0x4e: /* 0100 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "LR A,(IS--)");
break;
case 0x4f: /* 0100 1111 */
sprintf(buffer, "??? $%02X",op);
break;
case 0x50: /* 0101 0000 */
case 0x51: /* 0101 0001 */
case 0x52: /* 0101 0010 */
case 0x53: /* 0101 0011 */
case 0x54: /* 0101 0100 */
case 0x55: /* 0101 0101 */
case 0x56: /* 0101 0110 */
case 0x57: /* 0101 0111 */
case 0x58: /* 0101 1000 */
case 0x59: /* 0101 1001 */
case 0x5a: /* 0101 1010 */
case 0x5b: /* 0101 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR %s,A",rname[op & 15]);
break;
case 0x5c: /* 0101 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR (IS),A");
break;
case 0x5d: /* 0101 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR (IS++),A");
break;
case 0x5e: /* 0101 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_WR );
sprintf(buffer, "LR (IS--),A");
break;
case 0x5f: /* 0101 1111 */
sprintf(buffer, "??? $%02X",op);
break;
case 0x60: /* 0110 0000 */
case 0x61: /* 0110 0001 */
case 0x62: /* 0110 0010 */
case 0x63: /* 0110 0011 */
case 0x64: /* 0110 0100 */
case 0x65: /* 0110 0101 */
case 0x66: /* 0110 0110 */
case 0x67: /* 0110 0111 */
sym = set_ea_info( 0, op & 7, EA_UINT8, EA_VALUE );
sprintf(buffer, "LISU %s", sym);
break;
case 0x68: /* 0110 1000 */
case 0x69: /* 0110 1001 */
case 0x6a: /* 0110 1010 */
case 0x6b: /* 0110 1011 */
case 0x6c: /* 0110 1100 */
case 0x6d: /* 0110 1101 */
case 0x6e: /* 0110 1110 */
case 0x6f: /* 0110 1111 */
sym = set_ea_info( 0, op & 7, EA_UINT8, EA_VALUE );
sprintf(buffer, "LISL %s", sym);
break;
case 0x70: /* 0111 0000 */
case 0x71: /* 0111 0001 */
case 0x72: /* 0111 0010 */
case 0x73: /* 0111 0011 */
case 0x74: /* 0111 0100 */
case 0x75: /* 0111 0101 */
case 0x76: /* 0111 0110 */
case 0x77: /* 0111 0111 */
case 0x78: /* 0111 1000 */
case 0x79: /* 0111 1001 */
case 0x7a: /* 0111 1010 */
case 0x7b: /* 0111 1011 */
case 0x7c: /* 0111 1100 */
case 0x7d: /* 0111 1101 */
case 0x7e: /* 0111 1110 */
case 0x7f: /* 0111 1111 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_VALUE );
sprintf(buffer, "LIS %s", sym);
break;
case 0x80: /* 1000 0000 */
case 0x81: /* 1000 0001 */
case 0x82: /* 1000 0010 */
case 0x83: /* 1000 0011 */
case 0x84: /* 1000 0100 */
case 0x85: /* 1000 0101 */
case 0x86: /* 1000 0110 */
case 0x87: /* 1000 0111 */
size += 1;
sym = set_ea_info( 0, op & 7, EA_UINT8, EA_VALUE );
ea = pc + (INT32)(INT16)(INT8)cpu_readop_arg(pc+1) - 3;
sym2 = set_ea_info( 1, ea, EA_UINT16, EA_REL_PC );
sprintf(buffer, "BT %s,%s", sym, sym2);
break;
case 0x88: /* 1000 1000 */
sprintf(buffer, "AM");
break;
case 0x89: /* 1000 1001 */
sprintf(buffer, "AMD");
break;
case 0x8a: /* 1000 1010 */
sprintf(buffer, "NM");
break;
case 0x8b: /* 1000 1011 */
sprintf(buffer, "OM");
break;
case 0x8c: /* 1000 1100 */
sprintf(buffer, "XM");
break;
case 0x8d: /* 1000 1101 */
sprintf(buffer, "CM");
break;
case 0x8e: /* 1000 1110 */
sprintf(buffer, "ADC");
break;
case 0x8f: /* 1000 1111 */
size += 1;
ea = pc + (INT8)cpu_readop_arg(pc+1) - 3;
sym = set_ea_info( 0, ea, EA_UINT16, EA_REL_PC );
sprintf(buffer, "BR7 %s", sym);
break;
case 0x90: /* 1001 0000 */
case 0x91: /* 1001 0001 */
case 0x92: /* 1001 0010 */
case 0x93: /* 1001 0011 */
case 0x94: /* 1001 0100 */
case 0x95: /* 1001 0101 */
case 0x96: /* 1001 0110 */
case 0x97: /* 1001 0111 */
case 0x98: /* 1001 1000 */
case 0x99: /* 1001 1001 */
case 0x9a: /* 1001 1010 */
case 0x9b: /* 1001 1011 */
case 0x9c: /* 1001 1100 */
case 0x9d: /* 1001 1101 */
case 0x9e: /* 1001 1110 */
case 0x9f: /* 1001 1111 */
size += 1;
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_VALUE );
ea = pc + (INT8)cpu_readop_arg(pc+1) - 3;
sym2 = set_ea_info( 1, ea, EA_UINT16, EA_REL_PC );
sprintf(buffer, "BF %s,%s", sym, sym2);
break;
case 0xa0: /* 1010 0000 */
case 0xa1: /* 1010 0001 */
sym = set_ea_info( 0, op & 15, EA_INT8, EA_PORT_RD );
sprintf(buffer, "INS %s", sym);
break;
case 0xa2: /* 1010 0010 */
case 0xa3: /* 1010 0011 */
sprintf(buffer, "??? $%02X\n", op);
break;
case 0xa4: /* 1010 0100 */
case 0xa5: /* 1010 0101 */
case 0xa6: /* 1010 0110 */
case 0xa7: /* 1010 0111 */
case 0xa8: /* 1010 1000 */
case 0xa9: /* 1010 1001 */
case 0xaa: /* 1010 1010 */
case 0xab: /* 1010 1011 */
case 0xac: /* 1010 1100 */
case 0xad: /* 1010 1101 */
case 0xae: /* 1010 1110 */
case 0xaf: /* 1010 1111 */
sym = set_ea_info( 0, op & 15, EA_INT8, EA_PORT_RD );
sprintf(buffer, "INS %s", sym);
break;
case 0xb0: /* 1011 0000 */
case 0xb1: /* 1011 0001 */
sym = set_ea_info( 0, op & 15, EA_INT8, EA_PORT_WR );
sprintf(buffer, "OUTS %s", sym);
break;
case 0xb2: /* 1011 0010 */
case 0xb3: /* 1011 0011 */
sprintf(buffer, "??? $%02X\n", op);
break;
case 0xb4: /* 1011 0100 */
case 0xb5: /* 1011 0101 */
case 0xb6: /* 1011 0110 */
case 0xb7: /* 1011 0111 */
case 0xb8: /* 1011 1000 */
case 0xb9: /* 1011 1001 */
case 0xba: /* 1011 1010 */
case 0xbb: /* 1011 1011 */
case 0xbc: /* 1011 1100 */
case 0xbd: /* 1011 1101 */
case 0xbe: /* 1011 1110 */
case 0xbf: /* 1011 1111 */
sym = set_ea_info( 0, op & 15, EA_INT8, EA_PORT_WR );
sprintf(buffer, "OUTS %s", sym);
break;
case 0xc0: /* 1100 0000 */
case 0xc1: /* 1100 0001 */
case 0xc2: /* 1100 0010 */
case 0xc3: /* 1100 0011 */
case 0xc4: /* 1100 0100 */
case 0xc5: /* 1100 0101 */
case 0xc6: /* 1100 0110 */
case 0xc7: /* 1100 0111 */
case 0xc8: /* 1100 1000 */
case 0xc9: /* 1100 1001 */
case 0xca: /* 1100 1010 */
case 0xcb: /* 1100 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "AS %s", rname[op & 15]);
break;
case 0xcc: /* 1100 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "AS (IS)");
break;
case 0xcd: /* 1100 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "AS (IS++)");
break;
case 0xce: /* 1100 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "AS (IS--)");
break;
case 0xcf: /* 1100 1111 */
sprintf(buffer, "??? $%02X\n", op);
break;
case 0xd0: /* 1101 0000 */
case 0xd1: /* 1101 0001 */
case 0xd2: /* 1101 0010 */
case 0xd3: /* 1101 0011 */
case 0xd4: /* 1101 0100 */
case 0xd5: /* 1101 0101 */
case 0xd6: /* 1101 0110 */
case 0xd7: /* 1101 0111 */
case 0xd8: /* 1101 1000 */
case 0xd9: /* 1101 1001 */
case 0xda: /* 1101 1010 */
case 0xdb: /* 1101 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "ASD %s", rname[op & 15]);
break;
case 0xdc: /* 1101 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "ASD (IS)");
break;
case 0xdd: /* 1101 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "ASD (IS++)");
break;
case 0xde: /* 1101 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "ASD (IS--)");
break;
case 0xdf: /* 1101 1111 */
sprintf(buffer, "??? $%02X\n", op);
break;
case 0xe0: /* 1110 0000 */
case 0xe1: /* 1110 0001 */
case 0xe2: /* 1110 0010 */
case 0xe3: /* 1110 0011 */
case 0xe4: /* 1110 0100 */
case 0xe5: /* 1110 0101 */
case 0xe6: /* 1110 0110 */
case 0xe7: /* 1110 0111 */
case 0xe8: /* 1110 1000 */
case 0xe9: /* 1110 1001 */
case 0xea: /* 1110 1010 */
case 0xeb: /* 1110 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "XS %s", rname[op & 15]);
break;
case 0xec: /* 1110 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "XS (IS)");
break;
case 0xed: /* 1110 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "XS (IS++)");
break;
case 0xee: /* 1110 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "XS (IS--)");
break;
case 0xef: /* 1110 1111 */
sprintf(buffer, "??? $%02X\n", op);
break;
case 0xf0: /* 1111 0000 */
case 0xf1: /* 1111 0001 */
case 0xf2: /* 1111 0010 */
case 0xf3: /* 1111 0011 */
case 0xf4: /* 1111 0100 */
case 0xf5: /* 1111 0101 */
case 0xf6: /* 1111 0110 */
case 0xf7: /* 1111 0111 */
case 0xf8: /* 1111 1000 */
case 0xf9: /* 1111 1001 */
case 0xfa: /* 1111 1010 */
case 0xfb: /* 1111 1011 */
sym = set_ea_info( 0, op & 15, EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "NS %s", rname[op & 15]);
break;
case 0xfc: /* 1111 1100 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "NS (IS)");
break;
case 0xfd: /* 1111 1101 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "NS (IS++)");
break;
case 0xfe: /* 1111 1110 */
sym = set_ea_info( 0, activecpu_get_reg(F8_IS), EA_UINT8, EA_ZPG_RD );
sprintf(buffer, "NS (IS--)");
break;
case 0xff: /* 1111 1111 */
sprintf(buffer, "??? $%02X\n", op);
break;
}
return size;
}
/***************************************************************
* ARG
* read next opcode argument
***************************************************************/
INLINE UINT8 ARG(void)
{
UINT8 result = cpu_readop_arg(S.page + S.iar);
S.iar = (S.iar + 1) & PMSK;
return result;
}
static UINT8 ARG(void)
{
return cpu_readop_arg(I.PC.w.l++);
}
static INLINE int m4510_cpu_readop_arg(void)
{
register UINT16 t=m4510.pc.w.l++;
return cpu_readop_arg(M4510_MEM(t));
}
static INLINE UINT8 READ_OP_ARG(void)
{
return cpu_readop_arg(sc61860.pc++);
}
/****************************************************************************
* Disassemble opcode at PC and return number of bytes it takes
****************************************************************************/
unsigned DasmZ80( char *buffer, unsigned pc )
{
z80dasm *d;
const char *symbol, *src;
const char *ixy;
char *dst;
unsigned PC = pc;
INT8 offset = 0;
UINT8 op, op1;
UINT16 ea = 0, xy = 0;
ixy = "oops!!";
dst = buffer;
symbol = NULL;
op = cpu_readop( pc++ );
op1 = 0; /* keep GCC happy */
switch (op)
{
case 0xcb:
op = cpu_readop(pc++);
d = &mnemonic_cb[op];
break;
case 0xed:
op1 = cpu_readop(pc++);
d = &mnemonic_ed[op1];
break;
case 0xdd:
ixy = "ix";
op1 = cpu_readop(pc++);
if( op1 == 0xcb )
{
offset = (INT8) cpu_readop_arg(pc++);
op1 = cpu_readop_arg(pc++); /* fourth byte from OP_RAM! */
xy = z80_get_reg( Z80_IX );
ea = (xy + offset) & 0xffff;
d = &mnemonic_xx_cb[op1];
}
else d = &mnemonic_xx[op1];
break;
case 0xfd:
ixy = "iy";
op1 = cpu_readop(pc++);
if( op1 == 0xcb )
{
offset = (INT8) cpu_readop_arg(pc++);
op1 = cpu_readop_arg(pc++); /* fourth byte from OP_RAM! */
xy = z80_get_reg( Z80_IY );
ea = (ea + offset) & 0xffff;
d = &mnemonic_xx_cb[op1];
}
else d = &mnemonic_xx[op1];
break;
default:
d = &mnemonic_main[op];
break;
}
if( d->arguments )
{
dst += sprintf(dst, "%-4s ", s_mnemonic[d->mnemonic]);
src = d->arguments;
while( *src )
{
switch( *src )
{
case '?': /* illegal opcode */
dst += sprintf( dst, "$%02x,$%02x", op, op1);
break;
case 'A':
ea = cpu_readop_arg(pc) + ( cpu_readop_arg((pc+1)&0xffff) << 8);
pc += 2;
symbol = set_ea_info(0, ea, EA_UINT16, d->access);
dst += sprintf( dst, "%s", symbol );
break;
case 'B': /* Byte op arg */
ea = cpu_readop_arg( pc++ );
symbol = set_ea_info(1, ea, EA_UINT8, EA_VALUE);
dst += sprintf( dst, "%s", symbol );
break;
case '(': /* Memory byte at (HL) */
*dst++ = *src;
if( !strncmp( src, "(bc)", 4) )
{
ea = z80_get_reg( Z80_BC );
set_ea_info(0, ea, EA_UINT8, d->access);
}
else
if( !strncmp( src, "(de)", 4) )
{
ea = z80_get_reg( Z80_DE );
set_ea_info(0, ea, EA_UINT8, d->access);
}
else
if( !strncmp( src, "(hl)", 4) )
{
ea = z80_get_reg( Z80_HL );
if( d->access == EA_ABS_PC )
set_ea_info(0, ea, EA_DEFAULT, EA_ABS_PC);
else
set_ea_info(0, ea, EA_UINT8, d->access);
}
else
if( !strncmp( src, "(sp)", 4) )
{
ea = z80_get_reg( Z80_SP );
set_ea_info(0, ea, EA_UINT16, d->access);
}
else
if( !strncmp( src, "(P)", 3) )
{
ea = (z80_get_reg( Z80_AF ) & 0xff00) | cpu_readop_arg( pc );
set_ea_info(0, ea, EA_UINT16, d->access);
}
else
if( !strncmp( src, "(c)", 3) )
{
ea = z80_get_reg( Z80_BC );
set_ea_info(0, ea, EA_UINT16, d->access);
}
else
if( !strncmp( src, "(I)", 3) )
{
ea = xy;
set_ea_info(0, ea, EA_DEFAULT, d->access);
}
break;
case 'N': /* Immediate 16 bit */
ea = cpu_readop_arg(pc) + ( cpu_readop_arg((pc+1)&0xffff) << 8 );
pc += 2;
symbol = set_ea_info(1, ea, EA_UINT16, EA_VALUE );
dst += sprintf( dst, "%s", symbol );
break;
case 'O': /* Offset relative to PC */
offset = (INT8) cpu_readop_arg(pc++);
symbol = set_ea_info(0, PC, offset + 2, d->access);
dst += sprintf( dst, "%s", symbol );
break;
case 'P': /* Port number */
ea = cpu_readop_arg( pc++ );
dst += sprintf( dst, "$%02X", ea );
break;
case 'V': /* Restart vector */
ea = op & 0x38;
symbol = set_ea_info(0, ea, EA_UINT8, d->access);
dst += sprintf( dst, "%s", symbol );
break;
case 'W': /* Memory address word */
ea = cpu_readop_arg(pc) + ( cpu_readop_arg((pc+1)&0xffff) << 8);
pc += 2;
symbol = set_ea_info(0, ea, EA_UINT16, d->access);
dst += sprintf( dst, "%s", symbol );
break;
case 'X':
offset = (INT8) cpu_readop_arg(pc++);
ea = (xy + offset) & 0xffff;
case 'Y':
symbol = set_ea_info(0, ea, EA_UINT8, d->access);
dst += sprintf( dst,"(%s%c$%02x)", ixy, sign(offset), offs(offset) );
break;
case 'I':
dst += sprintf( dst, "%s", ixy);
break;
default:
*dst++ = *src;
}
src++;
}
*dst = '\0';
}
else
{
dst += sprintf(dst, "%s", s_mnemonic[d->mnemonic]);
}
return pc - PC;
}
NEC_INLINE UINT8 fetch(nec_state_t *nec_state)
{
prefetch(nec_state);
return cpu_readop_arg(((Sreg(PS)<<4)+nec_state->ip++) ^ nec_state->fetch_xor); // ^ fetch_xor?
}
INLINE int READ_OP_ARG(void)
{
saturn_ICount-=3;
return cpu_readop_arg(saturn.pc++);
}
static int m6502_get_argword(int addr)
{
return cpu_readop_arg(addr)+(cpu_readop_arg((addr+1)&0xffff) << 8);
}