#include <stdio.h>
#include "osd_cpu.h"
#include "memory.h"
#include "pps4.h"

static UINT8 OP(unsigned pc)
{
#if INVERT_DATA
	return (~cpu_readop(pc)) & 0xff;
#else
	return cpu_readop(pc);
#endif
}

static UINT8 ARG(unsigned pc)
{
#if INVERT_DATA
	return (~cpu_readop_arg(pc)) & 0xff;
#else
	return cpu_readop_arg(pc);
#endif
}

unsigned DasmPPS4(char *buff, unsigned pc)
{
	UINT8 op;
	unsigned PC = pc;

	switch (op = OP(pc))
	{
		case 0x00: sprintf (buff,"lbl   #$%03x", (~ARG(++pc) & 0xff)); break;
		case 0x01: case 0x02: case 0x03:
			sprintf (buff,"tml   $%X%02X", op, ARG(++pc)); break;
		case 0x04: sprintf (buff,"lbua");                            break;
		case 0x05: sprintf (buff,"rtn");                             break;
		case 0x06: sprintf (buff,"xs");                              break;
		case 0x07: sprintf (buff,"rtnsk");                           break;
		case 0x08: sprintf (buff,"adcsk");                           break;
		case 0x09: sprintf (buff,"adsk");                            break;
		case 0x0a: sprintf (buff,"adc");                             break;
		case 0x0b: sprintf (buff,"ad");                              break;
		case 0x0c: sprintf (buff,"eor");                             break;
		case 0x0d: sprintf (buff,"and");                             break;
		case 0x0e: sprintf (buff,"comp");                            break;
		case 0x0f: sprintf (buff,"or");                              break;

		case 0x10: sprintf (buff,"lbmx");                            break;
		case 0x11: sprintf (buff,"labl");                            break;
		case 0x12: sprintf (buff,"lax");                             break;
		case 0x13: sprintf (buff,"sag");                             break;
		case 0x14: sprintf (buff,"skf2");                            break;
		case 0x15: sprintf (buff,"skc");                             break;
		case 0x16: sprintf (buff,"skf1");                            break;
		case 0x17: sprintf (buff,"incb");                            break;
		case 0x18: sprintf (buff,"xbmx");                            break;
		case 0x19: sprintf (buff,"xabl");                            break;
		case 0x1a: sprintf (buff,"xax");                             break;
		case 0x1b: sprintf (buff,"lxa");                             break;
		case 0x1c: sprintf (buff,"iol   #$%02x", ARG(++pc));         break;
		case 0x1d: sprintf (buff,"doa");                             break;
		case 0x1e: sprintf (buff,"skz");                             break;
		case 0x1f: sprintf (buff,"decb");                            break;

		case 0x20: sprintf (buff,"sc");                              break;
		case 0x21: sprintf (buff,"sf2");                             break;
		case 0x22: sprintf (buff,"sf1");                             break;
		case 0x23: sprintf (buff,"dib");                             break;
		case 0x24: sprintf (buff,"rc");                              break;
		case 0x25: sprintf (buff,"rf2");                             break;
		case 0x26: sprintf (buff,"rf1");                             break;
		case 0x27: sprintf (buff,"dia");                             break;
		case 0x28: case 0x29: case 0x2a: case 0x2b: case 0x2c: case 0x2d: case 0x2e: case 0x2f:
			sprintf (buff,"exd   #$%x", (~op & 0x07)); break;

		case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: case 0x35: case 0x36: case 0x37:
			sprintf (buff,"ld    #$%x", (~op & 0x07)); break;
		case 0x38: case 0x39: case 0x3a: case 0x3b: case 0x3c: case 0x3d: case 0x3e: case 0x3f:
			sprintf (buff,"ex    #$%x", (~op & 0x07)); break;

		case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47:
		case 0x48: case 0x49: case 0x4a: case 0x4b: case 0x4c: case 0x4d: case 0x4e: case 0x4f:
			sprintf (buff,"skbi  #$%x", op & 0x0f); break;

		case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57:
		case 0x58: case 0x59: case 0x5a: case 0x5b: case 0x5c: case 0x5d: case 0x5e: case 0x5f:
			sprintf (buff,"tl    $%X%02X", op & 0x0f, ARG(++pc)); break;

		case 0x60: case 0x61: case 0x62: case 0x63: case 0x64: case 0x66: case 0x67:
		case 0x68: case 0x69: case 0x6a: case 0x6b: case 0x6c: case 0x6d: case 0x6e:
			sprintf (buff,"adi   #$%x", (~op & 0x0f)); break;
		case 0x65: sprintf (buff,"dc");                              break;
		case 0x6f: sprintf (buff,"cys");                             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 (buff,"ldi   #$%x", (~op & 0x0f)); 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:

		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:

		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:

		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 (buff,"t     $%03X", (pc & 0xfc0) | (op & 0x3f)); break;

		case 0xc0: case 0xc1: case 0xc2: case 0xc3: case 0xc4: case 0xc5: case 0xc6: case 0xc7:
		case 0xc8: case 0xc9: case 0xca: case 0xcb: case 0xcc: case 0xcd: case 0xce: case 0xcf:
			sprintf (buff,"lb    ($%03X)", op); break;

		case 0xd0: case 0xd1: case 0xd2: case 0xd3: case 0xd4: case 0xd5: case 0xd6: case 0xd7:
		case 0xd8: case 0xd9: case 0xda: case 0xdb: case 0xdc: case 0xdd: case 0xde: case 0xdf:

		case 0xe0: case 0xe1: case 0xe2: case 0xe3: case 0xe4: case 0xe5: case 0xe6: case 0xe7:
		case 0xe8: case 0xe9: case 0xea: case 0xeb: case 0xec: case 0xed: case 0xee: case 0xef:

		case 0xf0: case 0xf1: case 0xf2: case 0xf3: case 0xf4: case 0xf5: case 0xf6: case 0xf7:
		case 0xf8: case 0xf9: case 0xfa: case 0xfb: case 0xfc: case 0xfd: case 0xfe: case 0xff:
			sprintf (buff,"tm    ($%03X)", op); break;

		default:   sprintf (buff,"illegal");
	}
	pc++;

	return pc - PC;
}
