#include "driver.h"
#include <stdarg.h>



static const char *zl_condition_codes[] =
{
	// bit 3, 2 (ZL), bit 1, 0 (MASK)
	"",				// Z=0, L=0, ZM=0, ZL=0
	"gt",			// Z=0, L=0, ZM=0, ZL=1
	"neq",			// Z=0, L=0, ZM=1, ZL=0
	"gt",			// Z=0, L=0, ZM=1, ZL=1
	"",				// Z=0, L=1, ZM=0, ZL=0
	"lt",			// Z=0, L=1, ZM=0, ZL=1
	"neq",			// Z=0, L=1, ZM=1, ZL=0
	"lt",			// Z=0, L=1, ZM=1, ZL=1
	"",				// Z=1, L=0, ZM=0, ZL=0
	"gt",			// Z=1, L=0, ZM=0, ZL=1
	"eq",			// Z=1, L=0, ZM=1, ZL=0
	"geq",			// Z=1, L=0, ZM=1, ZL=1
	"",				// Z=1, L=1, ZM=0, ZL=0
	"lt",			// Z=1, L=1, ZM=0, ZL=1
	"eq",			// Z=1, L=1, ZM=1, ZL=0
	"leq",			// Z=1, L=1, ZM=1, ZL=1
};

static const char *cv_condition_codes[16] =
{
	"",				// C=0, V=0, CM=0, VM=0
	"nov",			// C=0, V=0, CM=0, VM=1
	"nc",			// C=0, V=0, CM=1, VM=0
	"nc nov",		// C=0, V=0, CM=1, VM=1
	"",				// C=0, V=1, CM=0, VM=0
	"ov",			// C=0, V=1, CM=0, VM=1
	"nc",			// C=0, V=1, CM=1, VM=0
	"nc ov",		// C=0, V=1, CM=1, VM=1
	"",				// C=1, V=0, CM=0, VM=0
	"nov",			// C=1, V=0, CM=0, VM=1
	"c",			// C=1, V=0, CM=1, VM=0
	"c nov",		// C=1, V=0, CM=1, VM=1
	"",				// C=1, V=1, CM=0, VM=0
	"ov",			// C=1, V=1, CM=0, VM=1
	"c",			// C=1, V=1, CM=1, VM=0
	"c ov",			// C=1, V=1, CM=1, VM=1
};

static const char *tp_condition_codes[4] =
{
	"bio",
	"tc",
	"ntc",
	""
};


static offs_t npc;

static char *output;

static void print(const char *fmt, ...)
{
	va_list vl;

	va_start(vl, fmt);
	output += vsprintf(output, fmt, vl);
	va_end(vl);
}

static UINT16 FETCH(void)
{
	UINT16 w;

	npc+=1;
	w = cpu_readop_arg16((npc-1) * 2);

	return w;
	//return (UINT16)((w >> 8) | (w << 8));
}

static char *GET_ADDRESS(int addr_mode, int address)
{
	static char buffer[100];

	if (addr_mode)		// Indirect addressing
	{
		int nar = address & 0x7;


		switch ((address >> 3) & 0xf)
		{
			case 0x0:	sprintf(buffer, "*"); break;
			case 0x1:	sprintf(buffer, "*, ar%d", nar); break;
			case 0x2:	sprintf(buffer, "*-"); break;
			case 0x3:	sprintf(buffer, "*-, ar%d", nar); break;
			case 0x4:	sprintf(buffer, "*+"); break;
			case 0x5:	sprintf(buffer, "*+, ar%d", nar); break;
			case 0x8:	sprintf(buffer, "*br0-"); break;
			case 0x9:	sprintf(buffer, "*br0-, ar%d", nar); break;
			case 0xa:	sprintf(buffer, "*0-"); break;
			case 0xb:	sprintf(buffer, "*0-, ar%d", nar); break;
			case 0xc:	sprintf(buffer, "*0+"); break;
			case 0xd:	sprintf(buffer, "*0+, ar%d", nar); break;
			case 0xe:	sprintf(buffer, "*br0+"); break;
			case 0xf:	sprintf(buffer, "*br0+, ar%d", nar); break;

			default:	sprintf(buffer, "??? (indirect)"); break;
		}
	}
	else			// Direct addressing
	{
		sprintf(buffer, "#%02X", address);
	}
	return buffer;
}

static char *GET_SHIFT(int shift)
{
	static char buffer[100];

	if (shift > 0)
	{
		sprintf(buffer, "<< %d", shift);
	}
	else
	{
		memset(buffer, 0, sizeof(buffer));
	}

	return buffer;
}

void dasm_group_be(UINT16 opcode)
{
	int subop = opcode & 0xff;

	switch (subop)
	{
		case 0x00:	print("abs"); break;
		case 0x01:	print("cmpl"); break;
		case 0x02:	print("neg"); break;
		case 0x03:	print("pac"); break;
		case 0x04:	print("apac"); break;
		case 0x05:	print("spac"); break;
		case 0x09:	print("sfl"); break;
		case 0x0a:	print("sfr"); break;
		case 0x0c:	print("rol"); break;
		case 0x0d:	print("ror"); break;
		case 0x10:	print("addb"); break;
		case 0x11:	print("adcb"); break;
		case 0x12:	print("andb"); break;
		case 0x13:	print("orb"); break;
		case 0x14:	print("rolb"); break;
		case 0x15:	print("rorb"); break;
		case 0x16:	print("sflb"); break;
		case 0x17:	print("sfrb"); break;
		case 0x18:	print("sbb"); break;
		case 0x19:	print("sbbb"); break;
		case 0x1a:	print("xorb"); break;
		case 0x1b:	print("crgt"); break;
		case 0x1c:	print("crlt"); break;
		case 0x1d:	print("exar"); break;
		case 0x1e:	print("sacb"); break;
		case 0x1f:	print("lacb"); break;
		case 0x20:	print("bacc"); break;
		case 0x21:	print("baccd"); break;
		case 0x22:	print("idle"); break;
		case 0x23:	print("idle2"); break;
		case 0x30:	print("cala"); break;
		case 0x32:	print("pop"); break;
		case 0x38:	print("reti"); break;
		case 0x3a:	print("rete"); break;
		case 0x3c:	print("push"); break;
		case 0x3d:	print("calad"); break;
		case 0x40:	print("clrc    intm"); break;
		case 0x41:	print("setc    intm"); break;
		case 0x42:	print("clrc    overflow"); break;
		case 0x43:	print("setc    overflow"); break;
		case 0x44:	print("clrc    cnf"); break;
		case 0x45:	print("setc    cnf"); break;
		case 0x46:	print("clrc    sign extend"); break;
		case 0x47:	print("setc    sign extend"); break;
		case 0x48:	print("clrc    hold"); break;
		case 0x49:	print("setc    hold"); break;
		case 0x4a:	print("clrc    tc"); break;
		case 0x4b:	print("setc    tc"); break;
		case 0x4c:	print("clrc    xf"); break;
		case 0x4d:	print("setc    xf"); break;
		case 0x4e:	print("clrc    carry"); break;
		case 0x4f:	print("setc    carry"); break;
		case 0x51:	print("trap"); break;
		case 0x52:	print("nmi"); break;
		case 0x58:	print("zpr"); break;
		case 0x59:	print("zap"); break;
		case 0x5a:	print("sath"); break;
		case 0x5b:	print("satl"); break;
		case 0x60: case 0x61: case 0x62: case 0x63:
		case 0x64: case 0x65: case 0x66: case 0x67:
		case 0x68: case 0x69: case 0x6a: case 0x6b:
		case 0x6c: case 0x6d: case 0x6e: case 0x6f:
		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:
					print("intr    %d", opcode & 0x1f); break;

		case 0x80:	print("mpy     #%04X", FETCH()); break;
		case 0x81:	print("and     #%04X", FETCH() << 16); break;
		case 0x82:	print("or      #%04X", FETCH() << 16); break;
		case 0x83:	print("xor     #%04X", FETCH() << 16); break;
		case 0xc4:	print("rpt     #%04X", FETCH()); break;
		case 0xc5:	print("rpt     #%04X", FETCH()); break;
		case 0xc6:	print("rpt     #%04X", FETCH()); break;

		default:	print("???     (group be)"); break;
	}
}

static void dasm_group_bf(UINT16 opcode)
{
	int subop = (opcode >>  4) & 0xf;
	int shift = opcode & 0xf;

	switch (subop)
	{
		case 0x0:
		{
			if (opcode & 0x8)
			{
				print("lar     ar%d, #%04X", opcode & 0x7, FETCH());
			}
			else
			{
				print("spm     #%02X", opcode & 0x3);
			}
			break;
		}

		case 0x8:	print("lacc    #%04X", FETCH() << shift); break;
		case 0x9:	print("add     #%04X", FETCH() << shift); break;
		case 0xa:	print("sub     #%04X", FETCH() << shift); break;
		case 0xb:	print("and     #%04X", FETCH() << shift); break;
		case 0xc:	print("or      #%04X", FETCH() << shift); break;
		case 0xd:	print("xor     #%04X", FETCH() << shift); break;
		case 0xe:	print("bsar    %d", shift); break;

		default:	print("???     (group bf)"); break;
	}
}

int tms32051_dasm_one(char *buffer, offs_t pc)
{
	UINT16 opcode;
	int baseop;
	int address, addr_mode;

	npc = pc;
	output = buffer;

	opcode = FETCH();
	baseop = (opcode >> 8) & 0xff;

	addr_mode = (opcode >> 7) & 0x1;
	address = opcode & 0x7f;

	switch (baseop)
	{
		case 0x00: case 0x01: case 0x02: case 0x03:
		case 0x04: case 0x05: case 0x06: case 0x07:
		{
			print("lar     AR%d, %s", (opcode >> 8)	& 0x7, GET_ADDRESS(addr_mode, address));
			break;
		}
		case 0x08:	print("lamm    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x09:	print("smmr    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x0a:	print("subc    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x0b:	print("rpt     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x0c:	print("out     %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0x0d:	print("ldp     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x0e:	print("lst     0, %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x0f:	print("lst     1, %s", GET_ADDRESS(addr_mode, address)); break;

		case 0x10: case 0x11: case 0x12: case 0x13:
		case 0x14: case 0x15: case 0x16: case 0x17:
		case 0x18: case 0x19: case 0x1a: case 0x1b:
		case 0x1c: case 0x1d: case 0x1e: case 0x1f:
		{
			print("lacc    %s %s", GET_ADDRESS(addr_mode, address), GET_SHIFT((opcode >> 8) & 0xf));
			break;
		}

		case 0x20: case 0x21: case 0x22: case 0x23:
		case 0x24: case 0x25: case 0x26: case 0x27:
		case 0x28: case 0x29: case 0x2a: case 0x2b:
		case 0x2c: case 0x2d: case 0x2e: case 0x2f:
		{
			print("add     %s %s", GET_ADDRESS(addr_mode, address), GET_SHIFT((opcode >> 8) & 0xf));
			break;
		}

		case 0x30: case 0x31: case 0x32: case 0x33:
		case 0x34: case 0x35: case 0x36: case 0x37:
		case 0x38: case 0x39: case 0x3a: case 0x3b:
		case 0x3c: case 0x3d: case 0x3e: case 0x3f:
		{
			print("sub     %s %s", GET_ADDRESS(addr_mode, address), GET_SHIFT((opcode >> 8) & 0xf));
			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:
		{
			print("bit     %d, %s", (opcode >> 8) & 0xf, GET_ADDRESS(addr_mode, address));
			break;
		}

		case 0x50:	print("mpya    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x51:	print("mpys    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x52:	print("sqra    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x53:	print("sqrs    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x54:	print("mpy     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x55:	print("mpyu    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x57:	print("bldp    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x58:	print("xpl     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x59:	print("opl     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x5a:	print("apl     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x5b:	print("cpl     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x5c:	print("xpl     %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0x5d:	print("opl     %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0x5e:	print("apl     %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0x5f:	print("cpl     %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;

		case 0x60:	print("addc    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x61:	print("add     %s << 16", GET_ADDRESS(addr_mode, address)); break;
		case 0x62:	print("adds    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x63:	print("addt    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x64:	print("subb    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x65:	print("sub     %s << 16", GET_ADDRESS(addr_mode, address)); break;
		case 0x66:	print("subs    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x67:	print("subt    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x68:	print("zalr    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x69:	print("lacl    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x6a:	print("lacc    %s << 16", GET_ADDRESS(addr_mode, address)); break;
		case 0x6b:	print("lact    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x6c:	print("xor     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x6e:	print("and     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x6f:	print("bitt    %s", GET_ADDRESS(addr_mode, address)); break;

		case 0x70:	print("lta     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x71:	print("ltp     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x72:	print("ltd     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x73:	print("lt      %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x74:	print("lts     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x75:	print("lph     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x76:	print("pshd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x77:	print("dmov    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x79:	print("b       %04X, %s", FETCH(), GET_ADDRESS(1, address)); break;
		case 0x7c:	print("sbrk    #%02X", opcode & 0xff); break;

		case 0x80: case 0x81: case 0x82: case 0x83:
		case 0x84: case 0x85: case 0x86: case 0x87:
		{
			print("sar     AR%d, %s", (opcode >> 8) & 0x7, GET_ADDRESS(addr_mode, address));
			break;
		}
		case 0x88:	print("samm    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x89:	print("lmmr    %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0x8a:	print("popd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x8b:	print("mar     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x8c:	print("spl     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x8d:	print("sph     %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x8e:	print("sst     0, %s", GET_ADDRESS(addr_mode, address)); break;
		case 0x8f:	print("sst     1, %s", GET_ADDRESS(addr_mode, address)); break;

		case 0x90: case 0x91: case 0x92: case 0x93:
		case 0x94: case 0x95: case 0x96: case 0x97:
		{
			print("sacl    %s %s", GET_ADDRESS(addr_mode, address), GET_SHIFT((opcode >> 8) & 0x7));
			break;
		}
		case 0x98: case 0x99: case 0x9a: case 0x9b:
		case 0x9c: case 0x9d: case 0x9e: case 0x9f:
		{
			print("sach    %s %s", GET_ADDRESS(addr_mode, address), GET_SHIFT((opcode >> 8) & 0x7));
			break;
		}

		case 0xa0:	print("norm    %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0xa2:	print("mac     %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0xa3:	print("macd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xa4:	print("blpd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xa5:	print("blpd    %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0xa6:	print("tblr    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xa7:	print("tblw    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xa8:	print("bldd    %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0xa9:	print("bldd    %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0xaa:	print("mads    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xab:	print("madd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xac:	print("bldd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xad:	print("bldd    %s", GET_ADDRESS(addr_mode, address)); break;
		case 0xae:	print("splk    %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;
		case 0xaf:	print("in      %s, #%04X", GET_ADDRESS(addr_mode, address), FETCH()); break;

		case 0xb0: case 0xb1: case 0xb2: case 0xb3:
		case 0xb4: case 0xb5: case 0xb6: case 0xb7:
		{
			print("lar     AR%d, #%02X", (opcode >> 8) & 0x7, opcode & 0xff);
			break;
		}
		case 0xb8:	print("add     #%02X", opcode & 0xff); break;
		case 0xb9:	print("lacl    #%02X", opcode & 0xff); break;
		case 0xba:	print("sub     #%02X", opcode & 0xff); break;
		case 0xbb:	print("rpt     #%02X", opcode & 0xff); break;

		case 0xbc:
		case 0xbd:
		{
			print("ldp     #%03X", opcode & 0x1ff);
			break;
		}
		case 0xbe:	dasm_group_be(opcode); break;
		case 0xbf:	dasm_group_bf(opcode); break;

		case 0xe0: case 0xe1: case 0xe2: case 0xe3:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;

			print("bcnd    %04X", FETCH());

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xe4: case 0xe5: case 0xe6: case 0xe7:
		case 0xf4: case 0xf5: case 0xf6: case 0xf7:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;
			int n = ((opcode >> 12) & 0x1) + 1;

			print("xc      %d", n);

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xe8: case 0xe9: case 0xea: case 0xeb:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;

			print("cc      %04X", FETCH());

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xec: case 0xed: case 0xee:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;

			print("retc    ");

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xef:	print("ret"); break;

		case 0xf0: case 0xf1: case 0xf2: case 0xf3:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;

			print("bcndd   %04X", FETCH());

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xf8: case 0xf9: case 0xfa: case 0xfb:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;

			print("ccd     %04X", FETCH());

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xfc: case 0xfd: case 0xfe:
		{
			int zlcvmask = opcode & 0xf;
			int zlcv = (opcode >> 4) & 0xf;
			int zl = (zlcv & 0xc) | ((zlcvmask >> 2) & 0x3);
			int cv = ((zlcv << 2) & 0xc) | (zlcvmask & 0x3);
			int tp = (opcode >> 8) & 0x3;

			print("retcd   ");

			if (strlen(zl_condition_codes[zl]) > 0)
			{
				print(", %s", zl_condition_codes[zl]);
			}
			if (strlen(cv_condition_codes[cv]) > 0)
			{
				print(", %s", cv_condition_codes[cv]);
			}
			if (strlen(tp_condition_codes[tp]) > 0)
			{
				print(", %s", tp_condition_codes[tp]);
			}
			break;
		}

		case 0xff:	print("retd"); break;

		default:	print("???     ($%04X)", opcode); break;
	}

	return npc-pc;
}
