// FB Alpha Knuckle Bash driver module
// Driver and emulation by Jan Klaassen

#include "toaplan.h"
#include "nec_intf.h"
// Knuckle Bash

static UINT8 DrvButton[8] = {0, 0, 0, 0, 0, 0, 0, 0};
static UINT8 DrvJoy1[8] = {0, 0, 0, 0, 0, 0, 0, 0};
static UINT8 DrvJoy2[8] = {0, 0, 0, 0, 0, 0, 0, 0};
static UINT8 DrvInput[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

static UINT8 DrvReset = 0;

// Rom information
static struct BurnRomInfo drvRomDesc[] = {
	{ "tp023_01.bin", 0x080000, 0x2965f81d, BRF_ESS | BRF_PRG }, //  0 CPU #0 code

	{ "tp023_3.bin",  0x200000, 0x32ad508b, BRF_GRA },			 //  1 GP9001 Tile data
	{ "tp023_5.bin",  0x200000, 0xb84c90eb, BRF_GRA },			 //  2
	{ "tp023_4.bin",  0x200000, 0xe493c077, BRF_GRA },			 //  3
	{ "tp023_6.bin",  0x200000, 0x9084b50a, BRF_GRA },			 //  4

	{ "tp023_02.bin", 0x008000, 0x4cd882a1, BRF_ESS | BRF_PRG }, //  5 Sound CPU
	{ "tp023_7.bin",  0x040000, 0x3732318f, BRF_SND },			 //  6 ADPCM data
};


STD_ROM_PICK(drv)
STD_ROM_FN(drv)

static struct BurnRomInfo drvkRomDesc[] = {
	{ "tp023_01.u52", 0x080000, 0x099aefbc, BRF_ESS | BRF_PRG }, //  0 CPU #0 code

	{ "tp023_3.bin",  0x200000, 0x32ad508b, BRF_GRA },			 //  1 GP9001 Tile data
	{ "tp023_5.bin",  0x200000, 0xb84c90eb, BRF_GRA },			 //  2
	{ "tp023_4.bin",  0x200000, 0xe493c077, BRF_GRA },			 //  3
	{ "tp023_6.bin",  0x200000, 0x9084b50a, BRF_GRA },			 //  4

	{ "tp023_02.bin", 0x008000, 0x4cd882a1, BRF_ESS | BRF_PRG }, //  5 Sound CPU
	{ "tp023_7.bin",  0x040000, 0x3732318f, BRF_SND },			 //  6 ADPCM data
};


STD_ROM_PICK(drvk)
STD_ROM_FN(drvk)

static struct BurnInputInfo kbashInputList[] = {
	{"P1 Coin",		BIT_DIGITAL,	DrvButton + 3,	"p1 coin"},
	{"P1 Start",	BIT_DIGITAL,	DrvButton + 5,	"p1 start"},

	{"P1 Up",		BIT_DIGITAL,	DrvJoy1 + 0,	"p1 up"},
	{"P1 Down",		BIT_DIGITAL,	DrvJoy1 + 1,	"p1 down"},
	{"P1 Left",		BIT_DIGITAL,	DrvJoy1 + 2,	"p1 left"},
	{"P1 Right",	BIT_DIGITAL,	DrvJoy1 + 3,	"p1 right"},
	{"P1 Button 1",	BIT_DIGITAL,	DrvJoy1 + 4,	"p1 fire 1"},
	{"P1 Button 2",	BIT_DIGITAL,	DrvJoy1 + 5,	"p1 fire 2"},
	{"P1 Button 3",	BIT_DIGITAL,	DrvJoy1 + 6,	"p1 fire 3"},

	{"P2 Coin",		BIT_DIGITAL,	DrvButton + 4,	"p2 coin"},
	{"P2 Start",	BIT_DIGITAL,	DrvButton + 6,	"p2 start"},

	{"P2 Up",		BIT_DIGITAL,	DrvJoy2 + 0,	"p2 up"},
	{"P2 Down",		BIT_DIGITAL,	DrvJoy2 + 1,	"p2 down"},
	{"P2 Left",		BIT_DIGITAL,	DrvJoy2 + 2,	"p2 left"},
	{"P2 Right",	BIT_DIGITAL,	DrvJoy2 + 3,	"p2 right"},
	{"P2 Button 1",	BIT_DIGITAL,	DrvJoy2 + 4,	"p2 fire 1"},
	{"P2 Button 2",	BIT_DIGITAL,	DrvJoy2 + 5,	"p2 fire 2"},
	{"P2 Button 3",	BIT_DIGITAL,	DrvJoy2 + 6,	"p2 fire 3"},

	{"Reset",		BIT_DIGITAL,	&DrvReset,		"reset"},
	{"Diagnostics",	BIT_DIGITAL,	DrvButton + 0,	"diag"},
	{"Dip A",		BIT_DIPSWITCH,	DrvInput + 3,	"dip"},
	{"Dip B",		BIT_DIPSWITCH,	DrvInput + 4,	"dip"},
	{"Dip C",		BIT_DIPSWITCH,	DrvInput + 5,	"dip"},
};

STDINPUTINFO(kbash)

static struct BurnDIPInfo kbashDIPList[] = {
	// Defaults
	{0x14,	0xFF, 0xFF,	0x00, NULL},
	{0x15,	0xFF, 0xFF,	0x00, NULL},
	{0x16,	0xFF, 0xFF,	0x00, NULL},

	// DIP 1
	{0,		0xFE, 0,	2,	  "Continue Price"},
	{0x14,	0x01, 0x01,	0x00, "Normal"},
	{0x14,	0x01, 0x01,	0x01, "Discount"},
	{0,		0xFE, 0,	2,	  "Screen Type"},
	{0x14,	0x01, 0x02,	0x00, "Normal screen"},
	{0x14,	0x01, 0x02,	0x02, "Invert screen"},
	{0,		0xFE, 0,	2,	  "Service"},
	{0x14,	0x01, 0x04,	0x00, "Normal mode"},
	{0x14,	0x01, 0x04,	0x04, "Test mode"},
	{0,		0xFE, 0,	2,	  "Advertise sound"},
	{0x14,	0x01, 0x08,	0x00, "On"},
	{0x14,	0x01, 0x08,	0x08, "Off"},
	{0,		0xFE, 0,	4,	  "Coin A"},
	{0x14,	0x01, 0x30,	0x00, "1 coin 1 play"},
	{0x14,	0x01, 0x30,	0x10, "1 coin 2 plays"},
	{0x14,	0x01, 0x30,	0x20, "2 coins 1 play"},
	{0x14,	0x01, 0x30,	0x30, "2 coins 3 plays"},
	{0,		0xFE, 0,	4,	  "Coin B"},
	{0x14,	0x01, 0xC0,	0x00, "1 coin 1 play"},
	{0x14,	0x01, 0xC0,	0x40, "1 coin 2 plays"},
	{0x14,	0x01, 0xC0,	0x80, "2 coins 1 play"},
	{0x14,	0x01, 0xC0,	0xC0, "2 coins 3 plays"},

	// DIP 2
	{0,		0xFE, 0,	4,	  "Game difficulty"},
	{0x15,	0x01, 0x03,	0x00, "B"},
	{0x15,	0x01, 0x03,	0x01, "A"},
	{0x15,	0x01, 0x03,	0x02, "C"},
	{0x15,	0x01, 0x03,	0x03, "D"},
	{0,		0xFE, 0,	4,	  "Extend"},
	{0x15,	0x01, 0x0C,	0x00, "100000, 400000"},
	{0x15,	0x01, 0x0C,	0x04, "100000 only"},
	{0x15,	0x01, 0x0C,	0x08, "200000 only"},
	{0x15,	0x01, 0x0C,	0x0C, "No extend"},
	{0,		0xFE, 0,	4,	  "Lives"},
	{0x15,	0x01, 0x30,	0x30, "1"},
	{0x15,	0x01, 0x30,	0x00, "2"},
	{0x15,	0x01, 0x30,	0x20, "3"},
	{0x15,	0x01, 0x30,	0x10, "4"},
	{0,		0xFE, 0,	2,	  "Invulnerability (Cheat)"},
    {0x15,	0x01, 0x40,	0x00, "Off"},
    {0x15,	0x01, 0x40,	0x40, "On"},
	{0,		0xFE, 0,	2,	  "Allow Continue"},
    {0x15,	0x01, 0x80,	0x00, "Yes"},
	{0x15,	0x01, 0x80,	0x80, "No"},

	// DIP 3
	{0,		0xFE, 0,	7,	  "Region"},
	{0x16,	0x01, 0xF0,	0x00, "Japan"},
	{0x16,	0x01, 0xF0,	0x10, "USA, Europe (Atari Games)"},
	{0x16,	0x01, 0xF0,	0x20, "Europe, USA (Atari Games)"},
	{0x16,	0x01, 0xF0,	0x30, "Korea"},
	{0x16,	0x01, 0xF0,	0x40, "Hong Kong"},
	{0x16,	0x01, 0xF0,	0x50, "Taiwan"},
	{0x16,	0x01, 0xF0,	0x60, "Southeast Asia"},
	{0x16,	0x01, 0xF0,	0x90, "USA"},
	{0x16,	0x01, 0xF0,	0xA0, "Europe"},
};

STDDIPINFO(kbash)

static struct BurnDIPInfo kbashkDIPList[] = {
	// Defaults
	{0x14,	0xFF, 0xFF,	0x00, NULL},
	{0x15,	0xFF, 0xFF,	0x00, NULL},
	{0x16,	0xFF, 0xFF,	0x00, NULL},

	// DIP 1
	{0,		0xFE, 0,	2,	  "Continue Price"},
	{0x14,	0x01, 0x01,	0x00, "Normal"},
	{0x14,	0x01, 0x01,	0x01, "Discount"},
	{0,		0xFE, 0,	2,	  "Screen Type"},
	{0x14,	0x01, 0x02,	0x00, "Normal screen"},
	{0x14,	0x01, 0x02,	0x02, "Invert screen"},
	{0,		0xFE, 0,	2,	  "Service"},
	{0x14,	0x01, 0x04,	0x00, "Normal mode"},
	{0x14,	0x01, 0x04,	0x04, "Test mode"},
	{0,		0xFE, 0,	2,	  "Advertise sound"},
	{0x14,	0x01, 0x08,	0x00, "On"},
	{0x14,	0x01, 0x08,	0x08, "Off"},
	{0,		0xFE, 0,	4,	  "Coin A"},
	{0x14,	0x01, 0x30,	0x00, "1 coin 1 play"},
	{0x14,	0x01, 0x30,	0x10, "1 coin 2 plays"},
	{0x14,	0x01, 0x30,	0x20, "2 coins 1 play"},
	{0x14,	0x01, 0x30,	0x30, "2 coins 3 plays"},
	{0,		0xFE, 0,	4,	  "Coin B"},
	{0x14,	0x01, 0xC0,	0x00, "1 coin 1 play"},
	{0x14,	0x01, 0xC0,	0x40, "1 coin 2 plays"},
	{0x14,	0x01, 0xC0,	0x80, "2 coins 1 play"},
	{0x14,	0x01, 0xC0,	0xC0, "2 coins 3 plays"},

	// DIP 2
	{0,		0xFE, 0,	4,	  "Game difficulty"},
	{0x15,	0x01, 0x03,	0x00, "B"},
	{0x15,	0x01, 0x03,	0x01, "A"},
	{0x15,	0x01, 0x03,	0x02, "C"},
	{0x15,	0x01, 0x03,	0x03, "D"},
	{0,		0xFE, 0,	4,	  "Extend"},
	{0x15,	0x01, 0x0C,	0x00, "100000, 400000"},
	{0x15,	0x01, 0x0C,	0x04, "100000 only"},
	{0x15,	0x01, 0x0C,	0x08, "200000 only"},
	{0x15,	0x01, 0x0C,	0x0C, "No extend"},
	{0,		0xFE, 0,	4,	  "Lives"},
	{0x15,	0x01, 0x30,	0x30, "1"},
	{0x15,	0x01, 0x30,	0x00, "2"},
	{0x15,	0x01, 0x30,	0x20, "3"},
	{0x15,	0x01, 0x30,	0x10, "4"},
	{0,		0xFE, 0,	2,	  "Invulnerability (Cheat)"},
    {0x15,	0x01, 0x40,	0x00, "Off"},
    {0x15,	0x01, 0x40,	0x40, "On"},
	{0,		0xFE, 0,	2,	  "Allow Continue"},
    {0x15,	0x01, 0x80,	0x00, "Yes"},
	{0x15,	0x01, 0x80,	0x80, "No"},

	// DIP 3
	{0,		0xFE, 0,	7,	  "Region"},
	{0x16,	0x01, 0xF0,	0x00, "Japan (Taito license)"},
	{0x16,	0x01, 0xF0,	0x30, "Korea"},
	{0x16,	0x01, 0xF0,	0x40, "Hong Kong"},
	{0x16,	0x01, 0xF0,	0x50, "Taiwan"},
	{0x16,	0x01, 0xF0,	0x60, "Southeast Asia"},
	{0x16,	0x01, 0xF0,	0x80, "Japan"},
	{0x16,	0x01, 0xF0,	0xb0, "Korea"},
	{0x16,	0x01, 0xF0,	0xc0, "Hong Kong"},
	{0x16,	0x01, 0xF0,	0xd0, "Taiwan"},
	{0x16,	0x01, 0xF0,	0xe0, "Southeast Asia"},
};

STDDIPINFO(kbashk)

static UINT8 *Mem = NULL, *MemEnd = NULL;
static UINT8 *RamStart, *RamEnd;
static UINT8 *Rom01, *Rom02;
static UINT8 *Ram01, *RamPal;
static UINT8 *ShareRAM;

static INT32 nColCount = 0x0800;

// This routine is called first to determine how much memory is needed (MemEnd-(UINT8 *)0),
// and then afterwards to set up all the pointers
static INT32 MemIndex()
{
	UINT8 *Next; Next = Mem;
	Rom01		= Next; Next += 0x080000;		// 68000 ROM
	Rom02		= Next; Next += 0x008000;
	GP9001ROM[0]= Next; Next += nGP9001ROMSize[0];	// GP9001 tile data
	MSM6295ROM = Next; Next += 0x040000;
	RamStart	= Next;
	Ram01		= Next; Next += 0x004000;		// CPU #0 work RAM
	RamPal		= Next; Next += 0x001000;		// palette
	ShareRAM	= Next; Next += 0x001000;
	GP9001RAM[0]= Next; Next += 0x004000;
	GP9001Reg[0]= (UINT16*)Next; Next += 0x0100 * sizeof(UINT16);
	RamEnd		= Next;
	ToaPalette	= (UINT32 *)Next; Next += nColCount * sizeof(UINT32);
	MemEnd		= Next;

	return 0;
}

// Scan ram
static INT32 DrvScan(INT32 nAction,INT32 *pnMin)
{
	struct BurnArea ba;

	if (pnMin) {						// Return minimum compatible version
		*pnMin = 0x020997;
	}
	if (nAction & ACB_VOLATILE) {		// Scan volatile ram
		memset(&ba, 0, sizeof(ba));
    		ba.Data		= RamStart;
		ba.nLen		= RamEnd-RamStart;
		ba.szName	= "All Ram";
		BurnAcb(&ba);

		SekScan(nAction);				// scan 68000 states
		VezScan(nAction);
		BurnYM2151Scan(nAction, pnMin);
		MSM6295Scan(nAction, pnMin);

		ToaScanGP9001(nAction, pnMin);
	}

	return 0;
}

static INT32 LoadRoms()
{
	// Load 68000 ROM
	BurnLoadRom(Rom01, 0, 1);

	// Load GP9001 tile data
	ToaLoadGP9001Tiles(GP9001ROM[0], 1, 4, nGP9001ROMSize[0]);

	BurnLoadRom(Rom02, 5, 1);
	BurnLoadRom(MSM6295ROM, 6, 1);

	return 0;
}

static UINT8 __fastcall kbashReadByte(UINT32 sekAddress)
{
	if ((sekAddress & 0xfff000) == 0x200000) {
		return ShareRAM[(sekAddress / 2) & 0x07ff];
	}

	switch (sekAddress) {
		case 0x208011:								// Player 1 inputs
			return DrvInput[0];
		case 0x208015:								// Player 2 inputs
			return DrvInput[1];
		case 0x208019:								// Other inputs
			return DrvInput[2];

		case 0x30000D:								// VBlank
			return ToaVBlankRegister();

//		default:
//			printf("Attempt to read byte value of location %x\n", sekAddress);
	}

	return 0;
}

static UINT16 __fastcall kbashReadWord(UINT32 sekAddress)
{
	if ((sekAddress & 0xfff000) == 0x200000) {
		return ShareRAM[(sekAddress / 2) & 0x07ff];
	}

	switch (sekAddress) {

		case 0x208010:								// Player 1 inputs
			return DrvInput[0];
		case 0x208014:								// Player 2 inputs
			return DrvInput[1];
		case 0x208018:								// Other inputs
			return DrvInput[2];

		case 0x300004:
			return ToaGP9001ReadRAM_Hi(0);
		case 0x300006:
			return ToaGP9001ReadRAM_Lo(0);

		case 0x30000C:
			return ToaVBlankRegister();

		case 0x700000:
			return ToaScanlineRegister();

//		default:
//			printf("Attempt to read word value of location %x\n", sekAddress);
	}

	return 0;
}

static void __fastcall kbashWriteByte(UINT32 sekAddress, UINT8 byteValue)
{
	if ((sekAddress & 0xfff000) == 0x200000) {
		ShareRAM[(sekAddress / 2) & 0x07ff] = byteValue;
		return;
	}

	switch (sekAddress) {
		//case 0x20801c:
		//case 0x20801d:
		//	break;

		default: {
//			printf("Attempt to write byte value %x to location %x\n", byteValue, sekAddress);
		}
	}
}

static void __fastcall kbashWriteWord(UINT32 sekAddress, UINT16 wordValue)
{
	if ((sekAddress & 0xfff000) == 0x200000) {
		ShareRAM[(sekAddress / 2) & 0x07ff] = wordValue;
		return;
	}

	switch (sekAddress) {

		case 0x300000:								// Set GP9001 VRAM address-pointer
			ToaGP9001SetRAMPointer(wordValue);
			break;

		case 0x300004:
			ToaGP9001WriteRAM(wordValue, 0);
			break;
		case 0x300006:
			ToaGP9001WriteRAM(wordValue, 0);
			break;

		case 0x300008:
			ToaGP9001SelectRegister(wordValue);
			break;

		case 0x30000C:
			ToaGP9001WriteRegister(wordValue);
			break;

//		default:
//			printf("Attempt to write word value %x to location %x\n", wordValue, sekAddress);
	}
}

static void __fastcall kbash_v25_write(UINT32 address, UINT8 data)
{
	switch (address)
	{
		case 0x04000:
			BurnYM2151SelectRegister(data);
		return;

		case 0x04001:
			BurnYM2151WriteRegister(data);
		return;

		case 0x04002:
			MSM6295Write(0, data);
		return;
	}
}

static UINT8 __fastcall kbash_v25_read(UINT32 address)
{
	switch (address)
	{
		case 0x04001:
			return BurnYM2151Read();

		case 0x04002:
			return MSM6295Read(0);
	}

	return 0;
}

static UINT8 __fastcall kbash_v25_read_port(UINT32 port)
{
	switch (port)
	{
		case V25_PORT_PT:
			return DrvInput[3]^0xff;

		case V25_PORT_P0:
			return DrvInput[4]^0xff;

		case V25_PORT_P1:
			return DrvInput[5]^0xff;
	}

	return 0;
}

static INT32 DrvDoReset()
{
	SekOpen(0);
	SekReset();
	SekClose();

	VezOpen(0);
	VezReset();
	VezClose();

	BurnYM2151Reset();
	MSM6295Reset(0);

	return 0;
}

static UINT8 nitro_decryption_table[256] = {
	0x1b,0x56,0x75,0x88,0x8c,0x06,0x58,0x72, 0x83,0x86,0x36,0x1a,0x5f,0xd3,0x8c,0xe9, /* 00 */
	0x22,0x0f,0x03,0x2a,0xeb,0x2a,0xf9,0x0f, 0xa4,0xbd,0x75,0xf3,0x4f,0x53,0x8e,0xfe, /* 10 */
	0x87,0xe8,0xb1,0x8d,0x36,0xb5,0x43,0x73, 0x2a,0x5b,0xf9,0x02,0x24,0x8a,0x03,0x80, /* 20 */
	0x86,0x8b,0xd1,0x3e,0x8d,0x3e,0x58,0xfb, 0xc3,0x79,0xbd,0xb7,0x8a,0xe8,0x0f,0x81, /* 30 */
	0xb7,0xd0,0x8b,0xeb,0xff,0xb8,0x90,0x8b, 0x5e,0xa2,0x90,0x90,0xab,0xb4,0x80,0x59, /* 40 */
	0x87,0x72,0xb5,0xbd,0xb0,0x88,0x50,0x0f, 0xfe,0xd2,0xc3,0x90,0x8a,0x90,0xf9,0x75, /* 50 */
	0x1a,0xb3,0x74,0x0a,0x68,0x24,0xbb,0x90, 0x75,0x47,0xfe,0x2c,0xbe,0xc3,0x88,0xd2, /* 60 */
	0x3e,0xc1,0x8c,0x33,0x0f,0x90,0x8b,0x90, 0xb9,0x1e,0xff,0xa2,0x3e,0x22,0xbe,0x57, /* 70 */
	0x81,0x3a,0xf6,0x88,0xeb,0xb1,0x89,0x8a, 0x32,0x80,0x0f,0xb1,0x48,0xc3,0x68,0x72, /* 80 */
	0x53,0x02,0xc0,0x02,0xe8,0xb4,0x74,0xbc, 0x90,0x58,0x0a,0xf3,0x75,0xc6,0x90,0xe8, /* 90 */
	0x26,0x50,0xfc,0x8c,0x90,0xb1,0xc3,0xd1, 0xeb,0x83,0xa4,0xbf,0x26,0x4b,0x46,0xfe, /* a0 */
	0xe2,0x89,0xb3,0x88,0x03,0x56,0x0f,0x38, 0xbb,0x0c,0x90,0x0f,0x07,0x8a,0x8a,0x33, /* b0 */
	0xfe,0xf9,0xb1,0xa0,0x45,0x36,0x22,0x5e, 0x8a,0xbe,0xc6,0xea,0x3c,0xb2,0x1e,0xe8, /* c0 */
	0x90,0xeb,0x55,0xf6,0x8a,0xb0,0x5d,0xc0, 0xbb,0x8d,0xf6,0xd0,0xd1,0x88,0x4d,0x90, /* d0 */
	0x51,0x51,0x74,0xbd,0x32,0xd1,0x90,0xd2, 0x53,0xc7,0xab,0x36,0x50,0xe9,0x33,0xb3, /* e0 */
	0x2e,0x05,0x88,0x59,0x74,0x74,0x22,0x8e, 0x8a,0x8a,0x36,0x08,0x0f,0x45,0x90,0x2e, /* f0 */
};

static INT32 DrvInit()
{
	INT32 nLen;

#ifdef DRIVER_ROTATION
	bToaRotateScreen = false;
#endif

	nGP9001ROMSize[0] = 0x800000;

	// Find out how much memory is needed
	Mem = NULL;
	MemIndex();
	nLen = MemEnd - (UINT8 *)0;
	if ((Mem = (UINT8 *)BurnMalloc(nLen)) == NULL) {
		return 1;
	}
	memset(Mem, 0, nLen);										// blank all memory
	MemIndex();													// Index the allocated memory

	// Load the roms into memory
	if (LoadRoms()) {
		return 1;
	}

	{
		SekInit(0, 0x68000);									// Allocate 68000
		SekOpen(0);
		SekMapMemory(Rom01,		0x000000, 0x07FFFF, MAP_ROM);	// CPU 0 ROM
		SekMapMemory(Ram01,		0x100000, 0x103FFF, MAP_RAM);
		SekMapMemory(RamPal,		0x400000, 0x400FFF, MAP_RAM);	// Palette RAM
		SekSetReadWordHandler(0, kbashReadWord);
		SekSetReadByteHandler(0, kbashReadByte);
		SekSetWriteWordHandler(0, kbashWriteWord);
		SekSetWriteByteHandler(0, kbashWriteByte);
		SekClose();

		VezInit(0, V25_TYPE, 16000000 /*before divider*/);
		VezOpen(0);
		VezMapArea(0x00000, 0x007ff, 0, ShareRAM);
		VezMapArea(0x00000, 0x007ff, 1, ShareRAM);
		VezMapArea(0x00000, 0x007ff, 2, ShareRAM);
		for (INT32 i = 0x80000; i < 0x100000; i += 0x8000) {
			VezMapArea(i, i + 0x7fff, 0, Rom02);
			VezMapArea(i, i + 0x7fff, 1, Rom02);
			VezMapArea(i, i + 0x7fff, 2, Rom02);
		}
		VezSetReadHandler(kbash_v25_read);
		VezSetWriteHandler(kbash_v25_write);
		VezSetReadPort(kbash_v25_read_port);
		VezSetDecode(nitro_decryption_table);
		VezClose();
	}

	BurnYM2151Init(3375000);
	BurnYM2151SetAllRoutes(0.50, BURN_SND_ROUTE_BOTH);
	MSM6295Init(0, 1000000 / 132, 1);
	MSM6295SetRoute(0, 0.50, BURN_SND_ROUTE_BOTH);

	nSpriteYOffset = 0x0011;

	nLayer0XOffset = -0x01D6;
	nLayer1XOffset = -0x01D8;
	nLayer2XOffset = -0x01DA;

	ToaInitGP9001();

	nToaPalLen = nColCount;
	ToaPalSrc = RamPal;
	ToaPalInit();

	DrvDoReset();			// Reset machine
	return 0;
}

static INT32 DrvExit()
{
	ToaPalExit();

	BurnYM2151Exit();
	MSM6295Exit(0);

	ToaExitGP9001();
	SekExit();				// Deallocate 68000s
	VezExit();

	BurnFree(Mem);

	MSM6295ROM = NULL;

	return 0;
}

static INT32 DrvDraw()
{
	ToaClearScreen(0x120);

	ToaGetBitmap();
	ToaRenderGP9001();						// Render GP9001 graphics

	ToaPalUpdate();							// Update the palette

	return 0;
}

static INT32 DrvFrame()
{
	INT32 nInterleave = 10;

	if (DrvReset) {														// Reset machine
		DrvDoReset();
	}

	// Compile digital inputs
	DrvInput[0] = 0x00;													// Buttons
	DrvInput[1] = 0x00;													// Player 1
	DrvInput[2] = 0x00;													// Player 2
	for (INT32 i = 0; i < 8; i++) {
		DrvInput[0] |= (DrvJoy1[i] & 1) << i;
		DrvInput[1] |= (DrvJoy2[i] & 1) << i;
		DrvInput[2] |= (DrvButton[i] & 1) << i;
	}
	ToaClearOpposites(&DrvInput[0]);
	ToaClearOpposites(&DrvInput[1]);

	SekNewFrame();
	VezNewFrame();

	INT32 nSoundBufferPos = 0;
	nCyclesTotal[0] = (INT32)((INT64)16000000 * nBurnCPUSpeedAdjust / (0x0100 * 60));
	nCyclesTotal[1] = (INT32)((INT64)8000000 * nBurnCPUSpeedAdjust / (0x0100 * 60));
	nCyclesDone[0] = 0;
	nCyclesDone[1] = 0;

	SekOpen(0);
	
	SekSetCyclesScanline(nCyclesTotal[0] / 262);
	nToaCyclesDisplayStart = nCyclesTotal[0] - ((nCyclesTotal[0] * (TOA_VBLANK_LINES + 240)) / 262);
	nToaCyclesVBlankStart = nCyclesTotal[0] - ((nCyclesTotal[0] * TOA_VBLANK_LINES) / 262);
	bool bVBlank = false;

	VezOpen(0);

	for (INT32 i = 0; i < nInterleave; i++) {
    	INT32 nCurrentCPU;
		INT32 nNext;

		// Run 68000
		nCurrentCPU = 0;
		nNext = (i + 1) * nCyclesTotal[nCurrentCPU] / nInterleave;

		// Trigger VBlank interrupt
		if (!bVBlank && nNext > nToaCyclesVBlankStart) {
			if (nCyclesDone[nCurrentCPU] < nToaCyclesVBlankStart) {
				nCyclesSegment = nToaCyclesVBlankStart - nCyclesDone[nCurrentCPU];
				nCyclesDone[nCurrentCPU] += SekRun(nCyclesSegment);
			}

			bVBlank = true;

			ToaBufferGP9001Sprites();

			// Trigger VBlank interrupt
			SekSetIRQLine(4, CPU_IRQSTATUS_AUTO);
		}

		nCyclesSegment = nNext - nCyclesDone[nCurrentCPU];
		nCyclesDone[nCurrentCPU] += SekRun(nCyclesSegment);

		nCyclesDone[1] += VezRun(nCyclesTotal[1] / nInterleave);
		
		if (pBurnSoundOut) {
			INT32 nSegmentLength = nBurnSoundLen / nInterleave;
			INT16* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
			BurnYM2151Render(pSoundBuf, nSegmentLength);
			MSM6295Render(0, pSoundBuf, nSegmentLength);
			nSoundBufferPos += nSegmentLength;
		}
	}

	if (pBurnSoundOut) {
		INT32 nSegmentLength = nBurnSoundLen - nSoundBufferPos;
		if (nSegmentLength) {
			INT16* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
			BurnYM2151Render(pSoundBuf, nSegmentLength);
			MSM6295Render(0, pSoundBuf, nSegmentLength);
		}
	}

	VezClose();
	SekClose();

	if (pBurnDraw) {
		DrvDraw();												// Draw screen if needed
	}

	return 0;
}

struct BurnDriver BurnDrvKBash = {
	"kbash", NULL, NULL, NULL, "1993",
	"Knuckle Bash\0", NULL, "Toaplan / Atari", "Toaplan GP9001 based",
	L"Knuckle Bash\0Knuckle Bash \u30CA\u30C3\u30AF\u30EB\u30D0\u30C3\u30B7\u30E5\0", NULL, NULL, NULL,
	BDF_GAME_WORKING, 2, HARDWARE_TOAPLAN_68K_Zx80, GBF_SCRFIGHT, 0,
	NULL, drvRomInfo, drvRomName, NULL, NULL, NULL, NULL, kbashInputInfo,kbashDIPInfo,
	DrvInit, DrvExit, DrvFrame, DrvDraw, DrvScan, &ToaRecalcPalette, 0x800,
	320, 240, 4, 3
};

struct BurnDriver BurnDrvKBashk = {
	"kbashk", "kbash", NULL, NULL, "1993",
	"Knuckle Bash (Korean PCB)\0", NULL, "Toaplan / Taito", "Toaplan GP9001 based",
	L"Knuckle Bash\0Knuckle Bash \u30CA\u30C3\u30AF\u30EB\u30D0\u30C3\u30B7\u30E5 (Korean PCB)\0", NULL, NULL, NULL,
	BDF_GAME_WORKING | BDF_CLONE, 2, HARDWARE_TOAPLAN_68K_Zx80, GBF_SCRFIGHT, 0,
	NULL, drvkRomInfo, drvkRomName, NULL, NULL, NULL, NULL, kbashInputInfo,kbashkDIPInfo,
	DrvInit, DrvExit, DrvFrame, DrvDraw, DrvScan, &ToaRecalcPalette, 0x800,
	320, 240, 4, 3
};
