/***************************************************************************

Ninja Gaiden memory map (preliminary)

000000-03ffff ROM
060000-063fff RAM
070000-070fff Video RAM (text layer)
072000-075fff VRAM (backgrounds)
076000-077fff Sprite RAM
078000-079fff Palette RAM

07a100-07a1ff Unknown

memory mapped ports:

read:
07a001    IN0
07a002    IN2
07a003    IN1
07a004    DWSB
07a005    DSWA
see the input_ports definition below for details on the input bits

write:
07a104-07a105 text layer Y scroll
07a10c-07a10d text layer X scroll
07a204-07a205 front layer Y scroll
07a20c-07a20d front layer X scroll
07a304-07a305 back layer Y scroll
07a30c-07a30d back layer Xscroll

***************************************************************************/

#include "driver.h"
#include "vidhrdw/generic.h"
#include "cpu/m68000/m68000.h"
#include "cpu/z80/z80.h"

extern unsigned char *gaiden_videoram;
extern unsigned char *gaiden_videoram2;
extern unsigned char *gaiden_videoram3;

void gaiden_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);

void gaiden_unknownram_w(int offset,int data);
int gaiden_unknownram_r(int offset);
void gaiden_videoram_w(int offset,int data);
int gaiden_videoram_r(int offset);
void gaiden_videoram2_w(int offset,int data);
int gaiden_videoram2_r(int offset);
void gaiden_videoram3_w(int offset,int data);
int gaiden_videoram3_r(int offset);
void gaiden_spriteram_w(int offset,int data);
int gaiden_spriteram_r(int offset);

void gaiden_txscrollx_w(int offset,int data);
void gaiden_txscrolly_w(int offset,int data);
void gaiden_fgscrollx_w(int offset,int data);
void gaiden_fgscrolly_w(int offset,int data);
void gaiden_bgscrollx_w(int offset,int data);
void gaiden_bgscrolly_w(int offset,int data);


void gaiden_background_w(int offset,int data);
void gaiden_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh);

int  gaiden_vh_start(void);
void gaiden_vh_stop(void);


int gaiden_interrupt(void)
{
	return 5;  /*Interrupt vector 5*/
}

int gaiden_input_r(int offset)
{
	switch (offset)
	{
		case 0:
			return input_port_4_r (offset);
			break;
		case 2:
			return (input_port_1_r (offset) << 8) + (input_port_0_r (offset));
			break;
		case 4:
			return (input_port_3_r (offset) << 8) + (input_port_2_r (offset));
			break;
	}

	return 0;
}


void gaiden_sound_command_w(int offset,int data)
{
	if (data & 0xff000000) soundlatch_w(0,data & 0xff);	/* Ninja Gaiden */
	if (data & 0x00ff0000) soundlatch_w(0,(data >> 8) & 0xff);	/* Tecmo Knight */
	cpu_cause_interrupt(1,Z80_NMI_INT);
}



/* Tecmo Knight has a simple protection. It writes codes to 0x07a804, and reads */
/* the answer from 0x07a007. The returned values contain the address of a */
/* function to jump to. */

static int prot;

void tknight_protection_w(int offset,int data)
{
	static int jumpcode;
	static int jumppoints[] =
	{
		0x0c0c,0x0cac,0x0d42,0x0da2,0x0eea,0x112e,0x1300,0x13fa,
		0x159a,0x1630,0x109a,0x1700,0x1750,0x1806,0x18d6,0x1a44,
		0x1b52
	};

	data = (data >> 8) & 0xff;

//if (errorlog) fprintf(errorlog,"PC %06x: prot = %02x\n",cpu_get_pc(),data);

	switch (data & 0xf0)
	{
		case 0x00:	/* init */
			prot = 0x00;
			break;
		case 0x10:	/* high 4 bits of jump code */
			jumpcode = (data & 0x0f) << 4;
			prot = 0x10;
			break;
		case 0x20:	/* low 4 bits of jump code */
			jumpcode |= data & 0x0f;
			if (jumpcode > 16)
			{
if (errorlog) fprintf(errorlog,"unknown jumpcode %02x\n",jumpcode);
				jumpcode = 0;
			}
			prot = 0x20;
			break;
		case 0x30:	/* ask for bits 12-15 of function address */
			prot = 0x40 | ((jumppoints[jumpcode] >> 12) & 0x0f);
			break;
		case 0x40:	/* ask for bits 8-11 of function address */
			prot = 0x50 | ((jumppoints[jumpcode] >> 8) & 0x0f);
			break;
		case 0x50:	/* ask for bits 4-7 of function address */
			prot = 0x60 | ((jumppoints[jumpcode] >> 4) & 0x0f);
			break;
		case 0x60:	/* ask for bits 0-3 of function address */
			prot = 0x70 | ((jumppoints[jumpcode] >> 0) & 0x0f);
			break;
	}
}

int tknight_protection_r(int offset)
{
//if (errorlog) fprintf(errorlog,"PC %06x: read prot %02x\n",cpu_get_pc(),prot);
	return prot;
}



static struct MemoryReadAddress readmem[] =
{
	{ 0x000000, 0x03ffff, MRA_ROM },
	{ 0x060000, 0x063fff, MRA_BANK1 },   /* RAM */
	{ 0x070000, 0x070fff, gaiden_videoram_r },
	{ 0x072000, 0x073fff, gaiden_videoram2_r },
	{ 0x074000, 0x075fff, gaiden_videoram3_r },
	{ 0x076000, 0x077fff, gaiden_spriteram_r },
	{ 0x078000, 0x0787ff, paletteram_word_r },
	{ 0x078800, 0x079fff, MRA_NOP },   /* extra portion of palette RAM, not really used */
	{ 0x07a000, 0x07a005, gaiden_input_r },
	{ 0x07a006, 0x07a007, tknight_protection_r },
	{ -1 }  /* end of table */
};

static struct MemoryWriteAddress writemem[] =
{
	{ 0x000000, 0x03ffff, MWA_ROM },
	{ 0x060000, 0x063fff, MWA_BANK1 },
	{ 0x070000, 0x070fff, gaiden_videoram_w, &gaiden_videoram },
	{ 0x072000, 0x073fff, gaiden_videoram2_w,  &gaiden_videoram2 },
	{ 0x074000, 0x075fff, gaiden_videoram3_w,  &gaiden_videoram3 },
	{ 0x076000, 0x077fff, gaiden_spriteram_w, &spriteram },
	{ 0x078000, 0x0787ff, paletteram_xxxxBBBBGGGGRRRR_word_w, &paletteram },
	{ 0x078800, 0x079fff, MWA_NOP },   /* extra portion of palette RAM, not really used */
	{ 0x07a104, 0x07a105, gaiden_txscrolly_w },
	{ 0x07a10c, 0x07a10d, gaiden_txscrollx_w },
	{ 0x07a204, 0x07a205, gaiden_fgscrolly_w },
	{ 0x07a20c, 0x07a20d, gaiden_fgscrollx_w },
	{ 0x07a304, 0x07a305, gaiden_bgscrolly_w },
	{ 0x07a30c, 0x07a30d, gaiden_bgscrollx_w },
	{ 0x07a800, 0x07a801, MWA_NOP },
	{ 0x07a802, 0x07a803, gaiden_sound_command_w },
	{ 0x07a804, 0x07a805, tknight_protection_w },
	{ 0x07a806, 0x07a807, MWA_NOP },
	{ -1 }  /* end of table */
};

static struct MemoryReadAddress sound_readmem[] =
{
	{ 0x0000, 0xdfff, MRA_ROM },
	{ 0xf000, 0xf7ff, MRA_RAM },
	{ 0xf800, 0xf800, OKIM6295_status_0_r },
	{ 0xfc00, 0xfc00, MRA_NOP },	/* ?? */
	{ 0xfc20, 0xfc20, soundlatch_r },
	{ -1 }	/* end of table */
};

static struct MemoryWriteAddress sound_writemem[] =
{
	{ 0x0000, 0xdfff, MWA_ROM },
	{ 0xf000, 0xf7ff, MWA_RAM },
	{ 0xf800, 0xf800, OKIM6295_data_0_w },
	{ 0xf810, 0xf810, YM2203_control_port_0_w },
	{ 0xf811, 0xf811, YM2203_write_port_0_w },
	{ 0xf820, 0xf820, YM2203_control_port_1_w },
	{ 0xf821, 0xf821, YM2203_write_port_1_w },
	{ 0xfc00, 0xfc00, MWA_NOP },	/* ?? */
	{ -1 }	/* end of table */
};



INPUT_PORTS_START( gaiden_input_ports )
	PORT_START      /* PLAYER 1 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START      /* PLAYER 2 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START	/* DSWA */
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x1c, 0x1c, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x1c, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_4C ) )
	PORT_DIPNAME( 0xe0, 0xe0, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )

	PORT_START	/* DSWB */
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x30, 0x30, "Energy" )
	PORT_DIPSETTING(    0x00, "2" )
	PORT_DIPSETTING(    0x30, "3" )
	PORT_DIPSETTING(    0x10, "4" )
	PORT_DIPSETTING(    0x20, "5" )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "1" )
	PORT_DIPSETTING(    0xc0, "2" )
	PORT_DIPSETTING(    0x40, "3" )
	PORT_DIPSETTING(    0x80, "4" )

	PORT_START	/* IN0 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN2 )
INPUT_PORTS_END

INPUT_PORTS_START( tknight_input_ports )
	PORT_START      /* PLAYER 1 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_PLAYER1 | IPF_8WAY )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START      /* PLAYER 2 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_PLAYER2 | IPF_8WAY )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2 )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2 )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START	/* DSWA */
	PORT_DIPNAME( 0xe0, 0xe0, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x80, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x40, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0xe0, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x60, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0xa0, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0xc0, DEF_STR( 1C_4C ) )
	PORT_DIPNAME( 0x1c, 0x1c, DEF_STR( Coin_B ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x10, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x1c, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x14, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 1C_4C ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Flip_Screen ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Demo_Sounds ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x01, DEF_STR( On ) )

	PORT_START	/* DSWB */
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0xc0, 0xc0, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x80, "1" )
	PORT_DIPSETTING(    0xc0, "2" )
	PORT_DIPSETTING(    0x40, "3" )
/*	PORT_DIPSETTING(    0x00, "2" ) */

	PORT_START	/* IN0 */
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN2 )
INPUT_PORTS_END



static struct GfxLayout tilelayout =
{
	8,8,	/* tile size */
	0x800,	/* number of tiles */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },
	{ 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4 },
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },
	32*8	/* offset to next tile */
};

static struct GfxLayout tile2layout =
{
	16,16,	/* tile size */
	0x1000,	/* number of tiles */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },	/* the bitplanes are packed in one nibble */
	{ 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4,
	  32*8+0*4, 32*8+1*4, 32*8+2*4, 32*8+3*4,
	  32*8+4*4, 32*8+5*4, 32*8+6*4, 32*8+7*4,},
	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32,
	  16*32, 17*32, 18*32, 19*32, 20*32, 21*32, 22*32, 23*32},
	128*8	/* offset to next tile */
};

#if 0
static struct GfxLayout old_spritelayout =
{
	8,8,	/* sprites size */
	0x8000,	/* number of sprites */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },	/* the bitplanes are packed in one nibble */
	{
		0*4, 1*4, 0*4+2048*256*8, 1*4+2048*256*8,
		2*4, 3*4, 2*4+2048*256*8, 3*4+2048*256*8
	},
	{ 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
	16*8	/* offset to next sprite */
};
#endif

#define OFFS (8*16)
static struct GfxLayout spritelayout =
{
	64,64,	/* sprites size */
	0x8000/64,	/* number of sprites */
	4,	/* 4 bits per pixel */
	{ 0, 1, 2, 3 },	/* the bitplanes are packed in one nibble */
	{
		0,4,0x80000*8,4+0x80000*8,8,12,8+0x80000*8,12+0x80000*8,
		OFFS,OFFS+4,OFFS+0x80000*8,OFFS+4+0x80000*8,OFFS+2*4,OFFS+3*4,OFFS+2*4+0x80000*8,OFFS+3*4+0x80000*8,
		OFFS*4,OFFS*4+4,OFFS*4+0x80000*8,OFFS*4+4+0x80000*8,OFFS*4+2*4,OFFS*4+3*4,OFFS*4+2*4+0x80000*8,OFFS*4+3*4+0x80000*8,
		OFFS*5,OFFS*5+4,OFFS*5+0x80000*8,OFFS*5+4+0x80000*8,OFFS*5+2*4,OFFS*5+3*4,OFFS*5+2*4+0x80000*8,OFFS*5+3*4+0x80000*8,
		OFFS*16,OFFS*16+4,OFFS*16+0x80000*8,OFFS*16+4+0x80000*8,OFFS*16+2*4,OFFS*16+3*4,OFFS*16+2*4+0x80000*8,OFFS*16+3*4+0x80000*8,
		OFFS*17,OFFS*17+4,OFFS*17+0x80000*8,OFFS*17+4+0x80000*8,OFFS*17+2*4,OFFS*17+3*4,OFFS*17+2*4+0x80000*8,OFFS*17+3*4+0x80000*8,
		OFFS*20,OFFS*20+4,OFFS*20+0x80000*8,OFFS*20+4+0x80000*8,OFFS*20+2*4,OFFS*20+3*4,OFFS*20+2*4+0x80000*8,OFFS*20+3*4+0x80000*8,
		OFFS*21,OFFS*21+4,OFFS*21+0x80000*8,OFFS*21+4+0x80000*8,OFFS*21+2*4,OFFS*21+3*4,OFFS*21+2*4+0x80000*8,OFFS*21+3*4+0x80000*8
	},
	{
		0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16,
		OFFS*2+0*16, OFFS*2+1*16, OFFS*2+2*16, OFFS*2+3*16, OFFS*2+4*16, OFFS*2+5*16, OFFS*2+6*16, OFFS*2+7*16,
		OFFS*8+0*16, OFFS*8+1*16, OFFS*8+2*16, OFFS*8+3*16, OFFS*8+4*16, OFFS*8+5*16, OFFS*8+6*16, OFFS*8+7*16,
		OFFS*10+0*16, OFFS*10+1*16, OFFS*10+2*16, OFFS*10+3*16, OFFS*10+4*16, OFFS*10+5*16, OFFS*10+6*16, OFFS*10+7*16,

		OFFS*32+0*16, OFFS*32+1*16, OFFS*32+2*16, OFFS*32+3*16, OFFS*32+4*16, OFFS*32+5*16, OFFS*32+6*16, OFFS*32+7*16,
		OFFS*34+0*16, OFFS*34+1*16, OFFS*34+2*16, OFFS*34+3*16, OFFS*34+4*16, OFFS*34+5*16, OFFS*34+6*16, OFFS*34+7*16,
		OFFS*40+0*16, OFFS*40+1*16, OFFS*40+2*16, OFFS*40+3*16, OFFS*40+4*16, OFFS*40+5*16, OFFS*40+6*16, OFFS*40+7*16,
		OFFS*42+0*16, OFFS*42+1*16, OFFS*42+2*16, OFFS*42+3*16, OFFS*42+4*16, OFFS*42+5*16, OFFS*42+6*16, OFFS*42+7*16
	},
	OFFS*64	/* offset to next sprite */
};

static struct GfxDecodeInfo gfxdecodeinfo[] =
{
	{ 1, 0x000000, &tilelayout,        256, 16 },	/* tiles 8x8*/
	{ 1, 0x010000, &tile2layout,       768, 16 },	/* tiles 16x16*/
	{ 1, 0x090000, &tile2layout,       512, 16 },	/* tiles 16x16*/
	{ 1, 0x110000, &spritelayout,        0, 16 },	/* sprites 8x8 */
	{ -1 } /* end of array */
};



/* handler called by the 2203 emulator when the internal timers cause an IRQ */
static void irqhandler(int irq)
{
	cpu_set_irq_line(1,0,irq ? ASSERT_LINE : CLEAR_LINE);
}

static struct YM2203interface ym2203_interface =
{
	2,			/* 2 chips */
	4000000,	/* 4 MHz ? (hand tuned) */
	{ YM2203_VOL(30,15), YM2203_VOL(30,15) },
	AY8910_DEFAULT_GAIN,
	{ 0 },
	{ 0 },
	{ 0 },
	{ 0 },
	{ irqhandler }
};


static struct OKIM6295interface okim6295_interface =
{
	1,                  /* 1 chip */
	{ 8000 },           /* 8000Hz frequency */
	{ 3 },              /* memory region 3 */
	{ 20 }
};


static struct MachineDriver machine_driver =
{
	/* basic machine hardware */
	{
		{
			CPU_M68000,
			8000000,	/* 8 Mhz */
			0,
			readmem,writemem,0,0,
			gaiden_interrupt,1,0,0
		},
		{
			CPU_Z80 | CPU_AUDIO_CPU,
			4000000,	/* 4 MHz */
			2,	/* memory region #2 */
			sound_readmem,sound_writemem,0,0,
			ignore_interrupt,0	/* NMIs are triggered by the main CPU */
								/* IRQs are triggered by the YM2203 */
		}
	},
	60, DEFAULT_60HZ_VBLANK_DURATION,
	1,	/* 1 CPU slice per frame - interleaving is forced when a sound command is written */
	0,

	/* video hardware */
	32*8, 30*8, { 0*8, 32*8-1, 2*8, 30*8-1 },
	gfxdecodeinfo,
	1024, 1024,
	0,

	VIDEO_TYPE_RASTER | VIDEO_MODIFIES_PALETTE,
	0,
	gaiden_vh_start,
	gaiden_vh_stop,
	gaiden_vh_screenrefresh,

	/* sound hardware */
	0,0,0,0,
	{
		{
			SOUND_YM2203,
			&ym2203_interface
		},
		{
			SOUND_OKIM6295,
			&okim6295_interface
		}
	}
};



/***************************************************************************

  Game driver(s)

***************************************************************************/

ROM_START( gaiden_rom )
	ROM_REGION(0x40000)	/* 2*128k for 68000 code */
	ROM_LOAD_EVEN( "gaiden.1",     0x00000, 0x20000, 0xe037ff7c )
	ROM_LOAD_ODD ( "gaiden.2",     0x00000, 0x20000, 0x454f7314 )

	ROM_REGION_DISPOSE(0x210000)     /* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "gaiden.5",     0x000000, 0x10000, 0x8d4035f7 )	/* 8x8 tiles */
	ROM_LOAD( "14.bin",       0x010000, 0x20000, 0x1ecfddaa )
	ROM_LOAD( "15.bin",       0x030000, 0x20000, 0x1291a696 )
	ROM_LOAD( "16.bin",       0x050000, 0x20000, 0x140b47ca )
	ROM_LOAD( "17.bin",       0x070000, 0x20000, 0x7638cccb )
	ROM_LOAD( "18.bin",       0x090000, 0x20000, 0x3fadafd6 )
	ROM_LOAD( "19.bin",       0x0b0000, 0x20000, 0xddae9d5b )
	ROM_LOAD( "20.bin",       0x0d0000, 0x20000, 0x08cf7a93 )
	ROM_LOAD( "21.bin",       0x0f0000, 0x20000, 0x1ac892f5 )
	ROM_LOAD( "gaiden.6",     0x110000, 0x20000, 0xe7ccdf9f )	/* sprites A1 */
	ROM_LOAD( "gaiden.8",     0x130000, 0x20000, 0x7ef7f880 )	/* sprites B1 */
	ROM_LOAD( "gaiden.10",    0x150000, 0x20000, 0xa6451dec )	/* sprites C1 */
	ROM_LOAD( "gaiden.12",    0x170000, 0x20000, 0x90f1e13a )	/* sprites D1 */
	ROM_LOAD( "gaiden.7",     0x190000, 0x20000, 0x016bec95 )	/* sprites A2 */
	ROM_LOAD( "gaiden.9",     0x1b0000, 0x20000, 0x6e9b7fd3 )	/* sprites B2 */
	ROM_LOAD( "gaiden.11",    0x1d0000, 0x20000, 0x7fbfdf5e )	/* sprites C2 */
	ROM_LOAD( "gaiden.13",    0x1f0000, 0x20000, 0x7d9f5c5e )	/* sprites D2 */

	ROM_REGION(0x10000)	/* 64k for the audio CPU */
	ROM_LOAD( "gaiden.3",     0x0000, 0x10000, 0x75fd3e6a )   /* Audio CPU is a Z80  */

	ROM_REGION(0x20000)	/* 128k for ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "gaiden.4",     0x0000, 0x20000, 0xb0e0faf9 ) /* samples */
ROM_END

ROM_START( shadoww_rom )
	ROM_REGION(0x40000)	/* 2*128k for 68000 code */
	ROM_LOAD_EVEN( "shadoww.1",    0x00000, 0x20000, 0xfefba387 )
	ROM_LOAD_ODD ( "shadoww.2",    0x00000, 0x20000, 0x9b9d6b18 )

	ROM_REGION_DISPOSE(0x210000)     /* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "gaiden.5",     0x000000, 0x10000, 0x8d4035f7 )	/* 8x8 tiles */
	ROM_LOAD( "14.bin",       0x010000, 0x20000, 0x1ecfddaa )
	ROM_LOAD( "15.bin",       0x030000, 0x20000, 0x1291a696 )
	ROM_LOAD( "16.bin",       0x050000, 0x20000, 0x140b47ca )
	ROM_LOAD( "17.bin",       0x070000, 0x20000, 0x7638cccb )
	ROM_LOAD( "18.bin",       0x090000, 0x20000, 0x3fadafd6 )
	ROM_LOAD( "19.bin",       0x0b0000, 0x20000, 0xddae9d5b )
	ROM_LOAD( "20.bin",       0x0d0000, 0x20000, 0x08cf7a93 )
	ROM_LOAD( "21.bin",       0x0f0000, 0x20000, 0x1ac892f5 )
	ROM_LOAD( "gaiden.6",     0x110000, 0x20000, 0xe7ccdf9f )	/* sprites A1 */
	ROM_LOAD( "gaiden.8",     0x130000, 0x20000, 0x7ef7f880 )	/* sprites B1 */
	ROM_LOAD( "gaiden.10",    0x150000, 0x20000, 0xa6451dec )	/* sprites C1 */
	ROM_LOAD( "shadoww.12a",  0x170000, 0x10000, 0x9bb07731 )	/* sprites D1 */
	ROM_LOAD( "shadoww.12b",  0x180000, 0x10000, 0xa4a950a2 )	/* sprites D1 */
	ROM_LOAD( "gaiden.7",     0x190000, 0x20000, 0x016bec95 )	/* sprites A2 */
	ROM_LOAD( "gaiden.9",     0x1b0000, 0x20000, 0x6e9b7fd3 )	/* sprites B2 */
	ROM_LOAD( "gaiden.11",    0x1d0000, 0x20000, 0x7fbfdf5e )	/* sprites C2 */
	ROM_LOAD( "shadoww.13a",  0x1f0000, 0x10000, 0x996d2fa5 )	/* sprites D2 */
	ROM_LOAD( "shadoww.13b",  0x200000, 0x10000, 0xb8df8a34 )	/* sprites D2 */

	ROM_REGION(0x10000)	/* 64k for the audio CPU */
	ROM_LOAD( "gaiden.3",     0x0000, 0x10000, 0x75fd3e6a )   /* Audio CPU is a Z80  */

	ROM_REGION(0x20000)	/* 128k for ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "gaiden.4",     0x0000, 0x20000, 0xb0e0faf9 ) /* samples */
ROM_END

ROM_START( tknight_rom )
	ROM_REGION(0x40000)	/* 2*128k for 68000 code */
	ROM_LOAD_EVEN( "tkni1.bin",    0x00000, 0x20000, 0x9121daa8 )
	ROM_LOAD_ODD ( "tkni2.bin",    0x00000, 0x20000, 0x6669cd87 )

	ROM_REGION_DISPOSE(0x210000)     /* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "tkni5.bin",    0x000000, 0x10000, 0x5ed15896 )	/* 8x8 tiles */
	ROM_LOAD( "tkni7.bin",    0x010000, 0x80000, 0x4b4d4286 )
	ROM_LOAD( "tkni6.bin",    0x090000, 0x80000, 0xf68fafb1 )
	ROM_LOAD( "tkni9.bin",    0x110000, 0x80000, 0xd22f4239 )	/* sprites */
	ROM_LOAD( "tkni8.bin",    0x190000, 0x80000, 0x4931b184 )	/* sprites */

	ROM_REGION(0x10000)	/* 64k for the audio CPU */
	ROM_LOAD( "tkni3.bin",    0x0000, 0x10000, 0x15623ec7 )   /* Audio CPU is a Z80  */

	ROM_REGION(0x20000)	/* 128k for ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "tkni4.bin",    0x0000, 0x20000, 0xa7a1dbcf ) /* samples */
ROM_END

ROM_START( wildfang_rom )
	ROM_REGION(0x40000)	/* 2*128k for 68000 code */
	ROM_LOAD_EVEN( "1.3st",    0x00000, 0x20000, 0xab876c9b )
	ROM_LOAD_ODD ( "2.5st",    0x00000, 0x20000, 0x1dc74b3b )

	ROM_REGION_DISPOSE(0x210000)     /* temporary space for graphics (disposed after conversion) */
	ROM_LOAD( "tkni5.bin",    0x000000, 0x10000, 0x5ed15896 )	/* 8x8 tiles */
	ROM_LOAD( "14.3a",        0x010000, 0x20000, 0x0d20c10c )
	ROM_LOAD( "15.3b",        0x030000, 0x20000, 0x3f40a6b4 )
	ROM_LOAD( "16.1a",        0x050000, 0x20000, 0x0f31639e )
	ROM_LOAD( "17.1b",        0x070000, 0x20000, 0xf32c158e )
	ROM_LOAD( "tkni6.bin",    0x090000, 0x80000, 0xf68fafb1 )
	ROM_LOAD( "tkni9.bin",    0x110000, 0x80000, 0xd22f4239 )	/* sprites */
	ROM_LOAD( "tkni8.bin",    0x190000, 0x80000, 0x4931b184 )	/* sprites */

	ROM_REGION(0x10000)	/* 64k for the audio CPU */
	ROM_LOAD( "tkni3.bin",    0x0000, 0x10000, 0x15623ec7 )   /* Audio CPU is a Z80  */

	ROM_REGION(0x20000)	/* 128k for ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "tkni4.bin",    0x0000, 0x20000, 0xa7a1dbcf ) /* samples */
ROM_END



struct GameDriver gaiden_driver =
{
	__FILE__,
	0,
	"gaiden",
	"Ninja Gaiden",
	"1988",
	"Tecmo",
	"Alex Pasadyn",
	0,
	&machine_driver,
		0,

	gaiden_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	gaiden_input_ports,

	0, 0, 0,   /* colors, palette, colortable */
	ORIENTATION_DEFAULT,
	0, 0
};

struct GameDriver shadoww_driver =
{
	__FILE__,
	&gaiden_driver,
	"shadoww",
	"Shadow Warriors",
	"1988",
	"Tecmo",
	"Alex Pasadyn",
	0,
	&machine_driver,
		0,

	shadoww_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	gaiden_input_ports,

	0, 0, 0,   /* colors, palette, colortable */
	ORIENTATION_DEFAULT,
	0, 0
};

struct GameDriver tknight_driver =
{
	__FILE__,
	0,
	"tknight",
	"Tecmo Knight",
	"1989",
	"Tecmo",
	"Alex Pasadyn\nNicola Salmoria",
	0,
	&machine_driver,
		0,

	tknight_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	tknight_input_ports,

	0, 0, 0,   /* colors, palette, colortable */
	ORIENTATION_DEFAULT,
	0, 0
};

struct GameDriver wildfang_driver =
{
	__FILE__,
	&tknight_driver,
	"wildfang",
	"Wild Fang",
	"1989",
	"Tecmo",
	"Alex Pasadyn\nNicola Salmoria",
	0,
	&machine_driver,
	0,

	wildfang_rom,
	0, 0,
	0,
	0,	/* sound_prom */

	tknight_input_ports,

	0, 0, 0,   /* colors, palette, colortable */
	ORIENTATION_DEFAULT,
	0, 0
};
