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

Oli-Boo-Chu

driver by Nicola Salmoria

TODO:
- main->sound cpu communication is completely wrong, commands don't play the
  intended sound.

============================================================================
PSG table:
data0 |data1   |sample            | possible data trigger
----------------------------------------------------------
0x80  |0x00    | coin             |
0x08  |0x00    | opening melody   |
0x40  |0x00    | bgm              |
0x04  |0x00    | hi-score melody  |
0x02  |0x00    | ending melody    |
0x01  |0x00    | spot melody      |
0x10  |0x00    | clear melody     |
0x20  |0x00    | race trap melody |
0x00  |0x80    | extend sound     |
0x00  |0x40    | oli paralyze     |
0x00  |0x04    | chu out          |
0x00  |0x08    | mystery sound    |
0x00  |0x01    | oli out          |
0x00  |0x10    | chu has food     |
0x00  |0x00    | <stop playing>   |
-----------------------------------------------------------
       0x02?                        *0xb doesn't do nothing
       0x20?                        *0xc doesn't do nothing

$7004 writes, related to $7000 reads
0x00-0x0f <don't care (retains previous value>
0x10-0x1f 0x28
0x20-0x2f 0x00
0x30-0x3f 0x48
0x40-0x4f 0x00
0x50-0x5f 0x80
0x60-0x6f 0x3a
0x70-0x7f 0x70
0x80-0x8f 0x0f
0x90-0x9f 0x0a
0xa0-0xaf 0x3a
0xb0-0xbf 0x61
0xc0-0xcf 0xca
0xd0-0xdf 0x01
0xe0-0xef 0x14
0xf0-0xff 0x32

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "sound/ay8910.h"

class olibochu_state : public driver_device
{
public:
	olibochu_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag) { }

	/* memory pointers */
	UINT8 *  m_videoram;
	UINT8 *  m_colorram;
	UINT8 *  m_spriteram;
	UINT8 *  m_spriteram2;
//  UINT8 *  m_paletteram;    // currently this uses generic palette handling
	size_t   m_spriteram_size;
	size_t   m_spriteram2_size;

	/* video-related */
	tilemap_t  *m_bg_tilemap;

	/* misc */
	int m_cmd;
};



static PALETTE_INIT( olibochu )
{
	int i;

	for (i = 0; i < machine.total_colors(); i++)
	{
		UINT8 pen;
		int bit0, bit1, bit2, r, g, b;

		if (i < 0x100)
			/* characters */
			pen = (color_prom[0x020 + (i - 0x000)] & 0x0f) | 0x10;
		else
			/* sprites */
			pen = (color_prom[0x120 + (i - 0x100)] & 0x0f) | 0x00;

		/* red component */
		bit0 = BIT(color_prom[pen], 0);
		bit1 = BIT(color_prom[pen], 1);
		bit2 = BIT(color_prom[pen], 2);
		r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;

		/* green component */
		bit0 = BIT(color_prom[pen], 3);
		bit1 = BIT(color_prom[pen], 4);
		bit2 = BIT(color_prom[pen], 5);
		g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;

		/* blue component */
		bit0 = BIT(color_prom[pen], 6);
		bit1 = BIT(color_prom[pen], 7);
		b = 0x4f * bit0 + 0xa8 * bit1;

		palette_set_color(machine, i, MAKE_RGB(r, g, b));
	}
}

static WRITE8_HANDLER( olibochu_videoram_w )
{
	olibochu_state *state = space->machine().driver_data<olibochu_state>();
	state->m_videoram[offset] = data;
	tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}

static WRITE8_HANDLER( olibochu_colorram_w )
{
	olibochu_state *state = space->machine().driver_data<olibochu_state>();
	state->m_colorram[offset] = data;
	tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}

static WRITE8_HANDLER( olibochu_flipscreen_w )
{
	if (flip_screen_get(space->machine()) != (data & 0x80))
	{
		flip_screen_set(space->machine(), data & 0x80);
		tilemap_mark_all_tiles_dirty_all(space->machine());
	}

	/* other bits are used, but unknown */
}

static TILE_GET_INFO( get_bg_tile_info )
{
	olibochu_state *state = machine.driver_data<olibochu_state>();
	int attr = state->m_colorram[tile_index];
	int code = state->m_videoram[tile_index] + ((attr & 0x20) << 3);
	int color = (attr & 0x1f) + 0x20;
	int flags = ((attr & 0x40) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0);

	SET_TILE_INFO(0, code, color, flags);
}

static VIDEO_START( olibochu )
{
	olibochu_state *state = machine.driver_data<olibochu_state>();
	state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows, 8, 8, 32, 32);
}

static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
	olibochu_state *state = machine.driver_data<olibochu_state>();
	UINT8 *spriteram = state->m_spriteram;
	UINT8 *spriteram_2 = state->m_spriteram2;
	int offs;

	/* 16x16 sprites */
	for (offs = 0; offs < state->m_spriteram_size; offs += 4)
	{
		int attr = spriteram[offs + 1];
		int code = spriteram[offs];
		int color = attr & 0x3f;
		int flipx = attr & 0x40;
		int flipy = attr & 0x80;
		int sx = spriteram[offs + 3];
		int sy = ((spriteram[offs + 2] + 8) & 0xff) - 8;

		if (flip_screen_get(machine))
		{
			sx = 240 - sx;
			sy = 240 - sy;
			flipx = !flipx;
			flipy = !flipy;
		}

		drawgfx_transpen(bitmap, cliprect,
			machine.gfx[1],
			code, color,
			flipx, flipy,
			sx, sy, 0);
	}

	/* 8x8 sprites */
	for (offs = 0; offs < state->m_spriteram2_size; offs += 4)
	{
		int attr = spriteram_2[offs + 1];
		int code = spriteram_2[offs];
		int color = attr & 0x3f;
		int flipx = attr & 0x40;
		int flipy = attr & 0x80;
		int sx = spriteram_2[offs + 3];
		int sy = spriteram_2[offs + 2];

		if (flip_screen_get(machine))
		{
			sx = 248 - sx;
			sy = 248 - sy;
			flipx = !flipx;
			flipy = !flipy;
		}

		drawgfx_transpen(bitmap, cliprect,
			machine.gfx[0],
			code, color,
			flipx, flipy,
			sx, sy, 0);
	}
}

static SCREEN_UPDATE( olibochu )
{
	olibochu_state *state = screen->machine().driver_data<olibochu_state>();
	tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
	draw_sprites(screen->machine(), bitmap, cliprect);
	return 0;
}


static WRITE8_HANDLER( sound_command_w )
{
	olibochu_state *state = space->machine().driver_data<olibochu_state>();
	int c;

	if (offset == 0)
		state->m_cmd = (state->m_cmd & 0x00ff) | (data << 8);
	else
		state->m_cmd = (state->m_cmd & 0xff00) | data;

	for (c = 15; c >= 0; c--)
		if (state->m_cmd & (1 << c)) break;

	if (c >= 0) soundlatch_w(space, 0, 15 - c);
}


static ADDRESS_MAP_START( olibochu_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x7fff) AM_ROM
	AM_RANGE(0x8000, 0x83ff) AM_RAM_WRITE(olibochu_videoram_w) AM_BASE_MEMBER(olibochu_state, m_videoram)
	AM_RANGE(0x8400, 0x87ff) AM_RAM_WRITE(olibochu_colorram_w) AM_BASE_MEMBER(olibochu_state, m_colorram)
	AM_RANGE(0x9000, 0x903f) AM_RAM //???
	AM_RANGE(0x9800, 0x983f) AM_RAM //???
	AM_RANGE(0xa000, 0xa000) AM_READ_PORT("IN0")
	AM_RANGE(0xa001, 0xa001) AM_READ_PORT("IN1")
	AM_RANGE(0xa002, 0xa002) AM_READ_PORT("IN2")
	AM_RANGE(0xa003, 0xa003) AM_READ_PORT("DSW0")
	AM_RANGE(0xa004, 0xa004) AM_READ_PORT("DSW1")
	AM_RANGE(0xa005, 0xa005) AM_READ_PORT("DSW2")
	AM_RANGE(0xa800, 0xa801) AM_WRITE(sound_command_w)
	AM_RANGE(0xa802, 0xa802) AM_WRITE(olibochu_flipscreen_w)	/* bit 6 = enable sound? */
	AM_RANGE(0xf400, 0xf41f) AM_RAM AM_BASE_SIZE_MEMBER(olibochu_state, m_spriteram, m_spriteram_size)
	AM_RANGE(0xf440, 0xf47f) AM_RAM AM_BASE_SIZE_MEMBER(olibochu_state, m_spriteram2, m_spriteram2_size)
	AM_RANGE(0xf000, 0xffff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( olibochu_sound_map, AS_PROGRAM, 8 )
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x6000, 0x63ff) AM_RAM
	AM_RANGE(0x7000, 0x7000) AM_READ(soundlatch_r)	/* likely ay8910 input port, not direct */
	AM_RANGE(0x7000, 0x7001) AM_DEVWRITE("aysnd", ay8910_address_data_w)
	AM_RANGE(0x7004, 0x7004) AM_WRITENOP //sound filter?
	AM_RANGE(0x7006, 0x7006) AM_WRITENOP //irq ack?
ADDRESS_MAP_END


static INPUT_PORTS_START( olibochu )
	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_SERVICE1 )
	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_COIN2 )	/* works in service mode but not in game */
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )

	PORT_START("IN1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("IN2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_PLAYER(2)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN )

	PORT_START("DSW0") /* Listed as sw1 */
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Lives ) )
	PORT_DIPSETTING(    0x00, "2" )
	PORT_DIPSETTING(    0x03, "3" )
	PORT_DIPSETTING(    0x02, "4" )
	PORT_DIPSETTING(    0x01, "5" )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Bonus_Life ) )
	PORT_DIPSETTING(    0x0c, "5000" )
	PORT_DIPSETTING(    0x08, "10000" )
	PORT_DIPSETTING(    0x04, "15000" )
	PORT_DIPSETTING(    0x00, DEF_STR( None ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) /* Nothing listed for this DIP */
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) /* Nothing listed for this DIP */
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, DEF_STR( Cabinet ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Upright ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Cocktail ) )
	PORT_DIPNAME( 0x80, 0x80, "Cross Hatch Pattern" )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW1") /* Most likely not a bank of Dip Switches */
	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( 0x40, 0x40, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2") /* Listed as sw2 */
	PORT_DIPNAME( 0x01, 0x01, "Stop Mode (Cheat)") /* In stop mode, press 2 to stop and 1 to restart */
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x0e, 0x0e, DEF_STR( Coin_A ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x0e, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x0c, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x0a, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_5C ) )
	PORT_SERVICE( 0x10, IP_ACTIVE_LOW )
	PORT_DIPNAME( 0x20, 0x20, "Invulnerability (Cheat)" ) /* Listed as "No Hit" */
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) /* Listed as "Start Pattern"... Level Select or Preview?? */
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) /* Listed as "Screen 180" currently has no effect */
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END



static const gfx_layout charlayout =
{
	8,8,
	RGN_FRAC(1,2),
	2,
	{ RGN_FRAC(1,2), 0 },
	{ 7, 6, 5, 4, 3, 2, 1, 0 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
	8*8
};

static const gfx_layout spritelayout =
{
	16,16,
	RGN_FRAC(1,2),
	2,
	{ RGN_FRAC(1,2), 0 },
	{ 7, 6, 5, 4, 3, 2, 1, 0,
			16*8+7, 16*8+6, 16*8+5, 16*8+4, 16*8+3, 16*8+2, 16*8+1, 16*8+0 },
	{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
			8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 },
	32*8
};

static GFXDECODE_START( olibochu )
	GFXDECODE_ENTRY( "gfx1", 0, charlayout,     0, 64 )
	GFXDECODE_ENTRY( "gfx2", 0, spritelayout, 256, 64 )
GFXDECODE_END




static MACHINE_START( olibochu )
{
	olibochu_state *state = machine.driver_data<olibochu_state>();

	state->save_item(NAME(state->m_cmd));
}

static MACHINE_RESET( olibochu )
{
	olibochu_state *state = machine.driver_data<olibochu_state>();

	state->m_cmd = 0;
}

static TIMER_DEVICE_CALLBACK( olibochu_scanline )
{
	int scanline = param;

	if(scanline == 248) // vblank-out irq
		cputag_set_input_line_and_vector(timer.machine(), "maincpu", 0, HOLD_LINE, 0xd7);	/* RST 10h - vblank */

	if(scanline == 0) // sprite buffer irq
		cputag_set_input_line_and_vector(timer.machine(), "maincpu", 0, HOLD_LINE, 0xcf);	/* RST 08h */
}

static MACHINE_CONFIG_START( olibochu, olibochu_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, 4000000)	/* 4 MHz ?? */
	MCFG_CPU_PROGRAM_MAP(olibochu_map)
	MCFG_TIMER_ADD_SCANLINE("scantimer", olibochu_scanline, "screen", 0, 1)

	MCFG_CPU_ADD("audiocpu", Z80, 4000000)	/* 4 MHz ?? */
	MCFG_CPU_PROGRAM_MAP(olibochu_sound_map)
	MCFG_CPU_PERIODIC_INT(irq0_line_hold,60) //???

//  MCFG_QUANTUM_PERFECT_CPU("maincpu")

	MCFG_MACHINE_START(olibochu)
	MCFG_MACHINE_RESET(olibochu)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
	MCFG_SCREEN_SIZE(32*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 1*8, 31*8-1)
	MCFG_SCREEN_UPDATE(olibochu)

	MCFG_GFXDECODE(olibochu)
	MCFG_PALETTE_LENGTH(512)

	MCFG_PALETTE_INIT(olibochu)
	MCFG_VIDEO_START(olibochu)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_SOUND_ADD("aysnd", AY8910, 2000000)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_CONFIG_END



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

  Game driver(s)

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

ROM_START( olibochu )
	ROM_REGION( 0x10000, "maincpu", 0 )	/* main CPU */
	ROM_LOAD( "1b.3n",        0x0000, 0x1000, CRC(bf17f4f4) SHA1(1075456f4b70a68548e0e1b6271fd4b845a77ce4) )
	ROM_LOAD( "2b.3lm",       0x1000, 0x1000, CRC(63833b0d) SHA1(0135c449c92470241d03a87709c739209139d660) )
	ROM_LOAD( "3b.3k",        0x2000, 0x1000, CRC(a4038e8b) SHA1(d7dce830239c8975ac135b213a99eec0c20ec3e2) )
	ROM_LOAD( "4b.3j",        0x3000, 0x1000, CRC(aad4bec4) SHA1(9203564ac841a8de2f9b8183d4086acce95e3d47) )
	ROM_LOAD( "5b.3h",        0x4000, 0x1000, CRC(66efa79f) SHA1(535369d958461834435d3202cd7310ecd0aa528c) )
	ROM_LOAD( "6b.3f",        0x5000, 0x1000, CRC(1123d1ef) SHA1(6094e732e61915c45b14acd90c1343f05385daf4) )
	ROM_LOAD( "7c.3e",        0x6000, 0x1000, CRC(89c26fb4) SHA1(ebc51e40612af894b20bd7fc3a5179cd35aaac9b) )
	ROM_LOAD( "8b.3d",        0x7000, 0x1000, CRC(af19e5a5) SHA1(5a55bbee5b2f20e2988171a310c8293dabbd9a72) )

	ROM_REGION( 0x10000, "audiocpu", 0 )	/* sound CPU */
	ROM_LOAD( "17.4j",        0x0000, 0x1000, CRC(57f07402) SHA1(a763a835ac512c69b4351c1ec72b0a64e46203aa) )
	ROM_LOAD( "18.4l",        0x1000, 0x1000, CRC(0a903e9c) SHA1(d893c2f5373f748d8bebf3673b15014f4a8d4b5c) )

	ROM_REGION( 0x2000, "samples", 0 )	/* samples? */
	ROM_LOAD( "15.1k",        0x0000, 0x1000, CRC(fb5dd281) SHA1(fba947ae7b619c2559b5af69ef02acfb15733f0d) )
	ROM_LOAD( "16.1m",        0x1000, 0x1000, CRC(c07614a5) SHA1(d13d271a324f99d008429c16193c4504e5894493) )

	ROM_REGION( 0x2000, "gfx1", 0 )
	ROM_LOAD( "13.6n",        0x0000, 0x1000, CRC(b4fcf9af) SHA1(b360daa0670160dca61512823c98bc37ad99b9cf) )
	ROM_LOAD( "14.4n",        0x1000, 0x1000, CRC(af54407e) SHA1(1883928b721e03e452fd0c626c403dc374b02ed7) )

	ROM_REGION( 0x4000, "gfx2", 0 )
	ROM_LOAD( "9.6a",         0x0000, 0x1000, CRC(fa69e16e) SHA1(5a493a0a108b3e496884d1f499f3445d4e241ecd) )
	ROM_LOAD( "10.2a",        0x1000, 0x1000, CRC(10359f84) SHA1(df55f06fd98233d0efbc30e3e24bf9b8cab1a5cc) )
	ROM_LOAD( "11.4a",        0x2000, 0x1000, CRC(1d968f5f) SHA1(4acf78d865ca36355bb15dc1d476f5e97a5d91b7) )
	ROM_LOAD( "12.2a",        0x3000, 0x1000, CRC(d8f0c157) SHA1(a7b0c873e016c3b3252c2c9b6400b0fd3d650b2f) )

	ROM_REGION( 0x0220, "proms", 0 )
	ROM_LOAD( "c-1",          0x0000, 0x0020, CRC(e488e831) SHA1(6264741f7091c614093ae1ea4f6ead3d0cef83d3) )	/* palette */
	ROM_LOAD( "c-2",          0x0020, 0x0100, CRC(698a3ba0) SHA1(3c1a6cb881ef74647c651462a27d812234408e45) )	/* sprite lookup table */
	ROM_LOAD( "c-3",          0x0120, 0x0100, CRC(efc4e408) SHA1(f0796426cf324791853aa2ae6d0c3d1f8108d5c2) )	/* char lookup table */
ROM_END



GAME( 1981, olibochu, 0, olibochu, olibochu, 0, ROT270, "Irem / GDI", "Oli-Boo-Chu", GAME_WRONG_COLORS | GAME_IMPERFECT_SOUND | GAME_SUPPORTS_SAVE )
