// license:BSD-3-Clause
// copyright-holders:Luca Elia
/***************************************************************************

                              -= Blomby Car =-

                    driver by   Luca Elia (l.elia@tin.it)


Main  CPU    :  68000
Video Chips  :  TI TPC1020AFN-084 (= Actel A1020A PL84C 9548)
Sound Chips  :  K-665 9546 (= M6295)

To Do:

- Flip screen unused ?
- Better driving wheel(s) support, merge with World Rally implementation

Blomby Car is said to be a bootleg of Gaelco's World Rally and uses many
of the same fonts
(Update: it actually is a bootleg of World Rally by looking how much
similar the two HWs are, down to the dipswitches!)

Waterball

Check game speed, it depends on a bit we toggle..

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

#include "emu.h"
#include "includes/blmbycar.h"

#include "cpu/m68000/m68000.h"
#include "sound/okim6295.h"
#include "screen.h"
#include "speaker.h"


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


                                Sound Banking


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

/* The top 64k of samples are banked (16 banks total) */

void blmbycar_state::okibank_w(uint8_t data)
{
	m_okibank->set_entry(data & 0x0f);
}

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


                                Input Handling


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

/* Preliminary potentiometric wheel support */

void blmbycar_state::blmbycar_pot_wheel_reset_w(uint8_t data)
{
	m_pot_wheel = m_pot_wheel_io->read() & 0xff;
}

void blmbycar_state::blmbycar_pot_wheel_shift_w(uint8_t data)
{
	if ( ((m_old_val & 0xff) == 0xff) && ((data & 0xff) == 0) )
		m_pot_wheel <<= 1;
	m_old_val = data;
}

uint16_t blmbycar_state::blmbycar_pot_wheel_r()
{
	return ((m_pot_wheel & 0x80) ? 0x04 : 0) | (machine().rand() & 0x08);
}


/* Preliminary optical wheel support */

uint16_t blmbycar_state::blmbycar_opt_wheel_r()
{
	return ((m_opt_wheel_io->read() & 0xff) << 8) | 0xff;
}


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


                                Video Handling


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

template<int Layer>
void blmbycar_state::vram_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
	COMBINE_DATA(&m_vram[Layer][offset]);
	m_tilemap[Layer]->mark_tile_dirty(offset / 2);
}


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


                                Memory Maps


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

void blmbycar_state::common_map(address_map &map)
{
	map(0x000000, 0x0fffff).rom();
	map(0x100000, 0x103fff).writeonly().share("unk_100000");                          // ???
	map(0x104000, 0x105fff).ram().w(FUNC(blmbycar_state::vram_w<1>)).share("vram_1"); // Layer 1
	map(0x106000, 0x107fff).ram().w(FUNC(blmbycar_state::vram_w<0>)).share("vram_0"); // Layer 0
	map(0x108000, 0x10bfff).writeonly().share("unk_108000");                          // ???
	map(0x10c000, 0x10c003).writeonly().share("scroll_1");              // Scroll 1
	map(0x10c004, 0x10c007).writeonly().share("scroll_0");              // Scroll 0
	map(0x200000, 0x203fff).ram().w(m_palette, FUNC(palette_device::write16)).share("palette").mirror(0x4000); // Palette
	map(0x440000, 0x441fff).ram();
	map(0x444000, 0x445fff).writeonly().share("spriteram");// Sprites (size?)
	map(0x700000, 0x700001).portr("DSW");
	map(0x700002, 0x700003).portr("P1_P2");
	map(0x70000d, 0x70000d).w(FUNC(blmbycar_state::okibank_w));                               // Sound
	map(0x70000f, 0x70000f).rw("oki", FUNC(okim6295_device::read), FUNC(okim6295_device::write));  // Sound
	map(0xfec000, 0xfeffff).ram();
}

void blmbycar_state::blmbycar_map(address_map &map)
{
	common_map(map);

	map(0x700004, 0x700005).r(FUNC(blmbycar_state::blmbycar_opt_wheel_r));                              // Wheel (optical)
	map(0x700006, 0x700007).portr("UNK");
	map(0x700008, 0x700009).r(FUNC(blmbycar_state::blmbycar_pot_wheel_r));                              // Wheel (potentiometer)
	map(0x70000a, 0x70000b).nopw();                                                // ? Wheel
	map(0x70006a, 0x70006b).nopr();                                                                    // Wheel (potentiometer)
	map(0x70006b, 0x70006b).w(FUNC(blmbycar_state::blmbycar_pot_wheel_reset_w));                       // Wheel (potentiometer)
	map(0x70007a, 0x70007b).nopr();                                                                    //
	map(0x70007b, 0x70007b).w(FUNC(blmbycar_state::blmbycar_pot_wheel_shift_w));                       //
}

uint16_t blmbycar_state::waterball_unk_r()
{
	m_retvalue ^= 0x0008; // must toggle.. but not vblank?
	return m_retvalue;
}

void blmbycar_state::watrball_map(address_map &map)
{
	common_map(map);

	map(0x700006, 0x700007).nopr();                                                 // read
	map(0x700008, 0x700009).r(FUNC(blmbycar_state::waterball_unk_r));                                   // 0x0008 must toggle
	map(0x70000a, 0x70000b).nopw();                                               // ?? busy
}

void blmbycar_state::blmbycar_oki_map(address_map &map)
{
	map(0x00000, 0x2ffff).rom();
	map(0x30000, 0x3ffff).bankr("okibank");
}

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


                                Input Ports


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

static INPUT_PORTS_START( blmbycar )

	PORT_START("DSW")       /* $700000.w */
	PORT_DIPNAME( 0x0003, 0x0003, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:8,7")
	PORT_DIPSETTING(      0x0002, DEF_STR( Easy )    )
	PORT_DIPSETTING(      0x0003, DEF_STR( Normal )  )
	PORT_DIPSETTING(      0x0001, DEF_STR( Hard )    )
	PORT_DIPSETTING(      0x0000, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x0004, 0x0004, "Joysticks" ) PORT_DIPLOCATION("SW1:6")
	PORT_DIPSETTING(      0x0000, "1" )
	PORT_DIPSETTING(      0x0004, "2" )
	PORT_DIPNAME( 0x0018, 0x0018, DEF_STR( Controls ) ) PORT_DIPLOCATION("SW1:5,4")
	PORT_DIPSETTING(      0x0018, DEF_STR( Joystick ) )
	PORT_DIPSETTING(      0x0010, "Pot Wheel" ) // Preliminary
	PORT_DIPSETTING(      0x0008, "Opt Wheel" ) // Preliminary
	PORT_DIPSETTING(      0x0000, "invalid, breaks game" )   // Time goes to 0 rally fast!
	PORT_DIPNAME( 0x0020, 0x0000, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW1:3")
	PORT_DIPSETTING(      0x0020, DEF_STR( Off ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
	PORT_DIPNAME( 0x0040, 0x0040, "Unknown 1-2" ) PORT_DIPLOCATION("SW1:2")
	PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
	PORT_SERVICE_DIPLOC(  0x0080, IP_ACTIVE_LOW, "SW1:1" )

	PORT_DIPNAME( 0x0700, 0x0700, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW2:8,7,6")
	PORT_DIPSETTING(      0x0700, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( 3C_4C ) )
	PORT_DIPSETTING(      0x0100, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(      0x0600, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(      0x0500, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(      0x0400, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(      0x0300, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(      0x0200, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x3800, 0x3800, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW2:5,4,3")
	PORT_DIPSETTING(      0x1000, DEF_STR( 6C_1C ) )
	PORT_DIPSETTING(      0x1800, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(      0x2000, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(      0x2800, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(      0x3000, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(      0x0800, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( 4C_3C ) )
	PORT_DIPSETTING(      0x3800, DEF_STR( 1C_1C ) )
	PORT_DIPNAME( 0x4000, 0x4000, "Credits To Start" ) PORT_DIPLOCATION("SW2:2")
	PORT_DIPSETTING(      0x4000, "1" )
	PORT_DIPSETTING(      0x0000, "2" )
	PORT_DIPNAME( 0x8000, 0x8000, DEF_STR( Free_Play ) ) PORT_DIPLOCATION("SW2:1")
	PORT_DIPSETTING(      0x8000, DEF_STR( Off ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )

	PORT_START("P1_P2") /* $700002.w */
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1) PORT_CONDITION("DSW", 0x18, EQUALS, 0x18)
	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN   ) PORT_PLAYER(1) PORT_CONDITION("DSW", 0x18, EQUALS, 0x18)
	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) PORT_CONDITION("DSW", 0x18, EQUALS, 0x18)
	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) PORT_CONDITION("DSW", 0x18, EQUALS, 0x18)
	PORT_BIT( 0x000f, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_CONDITION("DSW", 0x18, NOTEQUALS, 0x18)
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1) PORT_NAME("P1 Gear Shift") PORT_TOGGLE PORT_CONDITION("DSW", 0x18, NOTEQUALS, 0x18)
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_CONDITION("DSW", 0x18, EQUALS, 0x18)
	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_NAME("P1 Accelerator")
	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_COIN1  )
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_COIN2  )

	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN   ) PORT_PLAYER(2)
	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_START1  )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_START2  )

	PORT_START("OPT_WHEEL") /* $700004.w */
	PORT_BIT ( 0x00ff, 0x0000, IPT_DIAL ) PORT_SENSITIVITY(30) PORT_KEYDELTA(1) PORT_REVERSE PORT_CONDITION("DSW", 0x18, EQUALS, 0x08) PORT_NAME("P1 Opt Wheel")

	PORT_START("POT_WHEEL")
	PORT_BIT ( 0x00ff, 0x0080, IPT_AD_STICK_X ) PORT_SENSITIVITY(30) PORT_KEYDELTA(1) PORT_REVERSE PORT_CONDITION("DSW", 0x18, EQUALS, 0x10) PORT_NAME("P1 Pot Wheel")

	PORT_START("UNK")       /* $700006.w */
	PORT_BIT( 0xffff, IP_ACTIVE_LOW, IPT_UNKNOWN )

INPUT_PORTS_END


static INPUT_PORTS_START( watrball )
	PORT_START("DSW")
	PORT_DIPNAME( 0x0003, 0x0003, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW1:8,7") /* Affects timer */
	PORT_DIPSETTING(      0x0002, DEF_STR( Easy )    )    /* 180 Seconds */
	PORT_DIPSETTING(      0x0003, DEF_STR( Normal )  )    /* 150 Seconds */
	PORT_DIPSETTING(      0x0001, DEF_STR( Hard )    )    /* 120 Seconds */
	PORT_DIPSETTING(      0x0000, DEF_STR( Hardest ) )    /* 100 Seconds */
	PORT_DIPUNUSED_DIPLOC( 0x0004, 0x0004, "SW1:6" )
	PORT_DIPUNUSED_DIPLOC( 0x0008, 0x0008, "SW1:5" )
	PORT_DIPUNUSED_DIPLOC( 0x0010, 0x0010, "SW1:4" )
	PORT_DIPNAME( 0x0020, 0x0000, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW1:3")
	PORT_DIPSETTING(      0x0020, DEF_STR( Off ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
	PORT_DIPNAME( 0x0040, 0x0040, "Unknown 1-2" ) PORT_DIPLOCATION("SW1:2")
	PORT_DIPSETTING(      0x0040, DEF_STR( Off ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( On ) )
	PORT_SERVICE_DIPLOC(  0x0080, IP_ACTIVE_LOW, "SW1:1" )

	PORT_DIPNAME( 0x0700, 0x0700, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW2:8,7,6")
	PORT_DIPSETTING(      0x0700, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( 3C_4C ) )
	PORT_DIPSETTING(      0x0100, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(      0x0600, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(      0x0500, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(      0x0400, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(      0x0300, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(      0x0200, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x3800, 0x3800, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW2:5,4,3")
	PORT_DIPSETTING(      0x1000, DEF_STR( 6C_1C ) )
	PORT_DIPSETTING(      0x1800, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(      0x2000, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(      0x2800, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(      0x3000, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(      0x0800, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(      0x0000, DEF_STR( 4C_3C ) )
	PORT_DIPSETTING(      0x3800, DEF_STR( 1C_1C ) )
	PORT_DIPUNUSED_DIPLOC( 0x4000, 0x4000, "SW2:2" )
	PORT_DIPUNUSED_DIPLOC( 0x8000, 0x8000, "SW2:1" )

	PORT_START("P1_P2")
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN   ) PORT_PLAYER(1)
	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_COIN1  )
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_COIN2  )

	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN   ) PORT_PLAYER(2)
	PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_START1  )
	PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_START2  )
INPUT_PORTS_END

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


                                Graphics Layouts


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

/* 16x16x4 tiles (made of four 8x8 tiles) */
static const gfx_layout layout_16x16x4 =
{
	16,16,
	RGN_FRAC(1,4),
	4,
	{ RGN_FRAC(3,4),RGN_FRAC(2,4),RGN_FRAC(1,4),RGN_FRAC(0,4) },
	{ STEP8(0,1), STEP8(8*8*2,1) },
	{ STEP8(0,8), STEP8(8*8*1,8) },
	16*16
};

/* Layers both use the first $20 color codes. Sprites the next $10 */
static GFXDECODE_START( gfx_blmbycar )
	GFXDECODE_ENTRY( "sprites", 0, layout_16x16x4, 0x0, 64*8 ) // [0] Layers + Sprites
GFXDECODE_END



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


                                Machine Drivers


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

MACHINE_START_MEMBER(blmbycar_state,blmbycar)
{
	save_item(NAME(m_pot_wheel));
	save_item(NAME(m_old_val));

	m_okibank->configure_entries(0, 16, memregion("oki")->base(), 0x10000);
}

MACHINE_RESET_MEMBER(blmbycar_state,blmbycar)
{
	m_pot_wheel = 0;
	m_old_val = 0;
}


void blmbycar_state::blmbycar(machine_config &config)
{
	/* basic machine hardware */
	M68000(config, m_maincpu, XTAL(24'000'000)/2);   /* 12MHz */
	m_maincpu->set_addrmap(AS_PROGRAM, &blmbycar_state::blmbycar_map);
	m_maincpu->set_vblank_int("screen", FUNC(blmbycar_state::irq1_line_hold));

	MCFG_MACHINE_START_OVERRIDE(blmbycar_state,blmbycar)
	MCFG_MACHINE_RESET_OVERRIDE(blmbycar_state,blmbycar)

	/* video hardware */
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_refresh_hz(60);
	screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
	screen.set_size(0x180, 0x100);
	screen.set_visarea_full();
	screen.set_screen_update(FUNC(blmbycar_state::screen_update));
	screen.set_palette(m_palette);

	GFXDECODE(config, m_gfxdecode, m_palette, gfx_blmbycar);

	PALETTE(config, m_palette).set_format(palette_device::xBRG_444, 0x2000);

	BLMBYCAR_SPRITES(config, m_sprites, 0);
	m_sprites->set_gfxdecode_tag("gfxdecode");
	m_sprites->set_screen_tag("screen");

	/* sound hardware */
	SPEAKER(config, "mono").front_center();

	okim6295_device &oki(OKIM6295(config, "oki", XTAL(1'000'000), okim6295_device::PIN7_HIGH)); // clock frequency & pin 7 not verified
	oki.set_addrmap(0, &blmbycar_state::blmbycar_oki_map);
	oki.add_route(ALL_OUTPUTS, "mono", 1.0);
}


MACHINE_START_MEMBER(blmbycar_state,watrball)
{
	save_item(NAME(m_retvalue));

	m_okibank->configure_entries(0, 16, memregion("oki")->base(), 0x10000);
}

MACHINE_RESET_MEMBER(blmbycar_state,watrball)
{
	m_retvalue = 0;
}

void blmbycar_state::watrball(machine_config &config)
{
	blmbycar(config);

	/* basic machine hardware */
	m_maincpu->set_addrmap(AS_PROGRAM, &blmbycar_state::watrball_map);

	MCFG_MACHINE_START_OVERRIDE(blmbycar_state,watrball)
	MCFG_MACHINE_RESET_OVERRIDE(blmbycar_state,watrball)

	/* video hardware */
	screen_device &screen(*subdevice<screen_device>("screen"));
	screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500) /* not accurate */);
	screen.set_visarea(0, 0x180-1, 16, 0x100-1);
}


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


                                ROMs Loading


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

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

                                Blomby Car
Abm & Gecas, 1990.

CPU : MC68000P12
SND : Oki M6295 (samples only)
OSC : 30.000MHz, 24.000MHz & 1.00MHz resonator
DSW : 2 x 8
GFX : TI TPC1020AFN-084

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

ROM_START( blmbycar )
	ROM_REGION( 0x100000, "maincpu", 0 )        /* 68000 Code */
	ROM_LOAD16_BYTE( "bcrom4.bin", 0x000000, 0x080000, CRC(06d490ba) SHA1(6d113561b474bf613c6b91c9525a52025ae65ab7) )
	ROM_LOAD16_BYTE( "bcrom6.bin", 0x000001, 0x080000, CRC(33aca664) SHA1(04fff492654d3edac62e9d35808e5946bcc78cbb) )

	ROM_REGION( 0x200000, "sprites", 0 )    /* Sprites */
	ROM_LOAD( "bc_rom7",   0x000000, 0x080000, CRC(e55ca79b) SHA1(4453a6ae0518832f437ab701c28cb2f32920f8ba) )
	ROM_LOAD( "bc_rom8",   0x080000, 0x080000, CRC(cdf38c96) SHA1(3273c29b6a01a7296d06fc653120f8c615195d2c) )
	ROM_LOAD( "bc_rom9",   0x100000, 0x080000, CRC(0337ab3d) SHA1(18c72cd640c7b599390dffaeb670f5832202bf06) )
	ROM_LOAD( "bc_rom10",  0x180000, 0x080000, CRC(5458917e) SHA1(c8dd5a391cc20a573e27a140b185893a8c04859e) )

	ROM_REGION( 0x100000, "oki", 0 )    /* 8 bit adpcm (banked) */
	ROM_LOAD( "bc_rom1",     0x000000, 0x080000, CRC(ac6f8ba1) SHA1(69d2d47cdd331bde5a8973d29659b3f8520452e7) )
	ROM_LOAD( "bc_rom2",     0x080000, 0x080000, CRC(a4bc31bf) SHA1(f3d60141a91449a73f6cec9f4bc5d95ca7911e19) )
ROM_END

ROM_START( blmbycaru )
	ROM_REGION( 0x100000, "maincpu", 0 )        /* 68000 Code */
	ROM_LOAD16_BYTE( "bc_rom4", 0x000000, 0x080000, CRC(76f054a2) SHA1(198efd152b13033e5249119ca48b9e0f6351b0b9) )
	ROM_LOAD16_BYTE( "bc_rom6", 0x000001, 0x080000, CRC(2570b4c5) SHA1(706465950023a6ef7c85ceb9c76246d7556b3859) )

	ROM_REGION( 0x200000, "sprites", 0 )    /* Sprites */
	ROM_LOAD( "bc_rom7",   0x000000, 0x080000, CRC(e55ca79b) SHA1(4453a6ae0518832f437ab701c28cb2f32920f8ba) )
	ROM_LOAD( "bc_rom8",   0x080000, 0x080000, CRC(cdf38c96) SHA1(3273c29b6a01a7296d06fc653120f8c615195d2c) )
	ROM_LOAD( "bc_rom9",   0x100000, 0x080000, CRC(0337ab3d) SHA1(18c72cd640c7b599390dffaeb670f5832202bf06) )
	ROM_LOAD( "bc_rom10",  0x180000, 0x080000, CRC(5458917e) SHA1(c8dd5a391cc20a573e27a140b185893a8c04859e) )

	ROM_REGION( 0x100000, "oki", 0 )    /* 8 bit adpcm (banked) */
	ROM_LOAD( "bc_rom1",     0x000000, 0x080000, CRC(ac6f8ba1) SHA1(69d2d47cdd331bde5a8973d29659b3f8520452e7) )
	ROM_LOAD( "bc_rom2",     0x080000, 0x080000, CRC(a4bc31bf) SHA1(f3d60141a91449a73f6cec9f4bc5d95ca7911e19) )
ROM_END

/*

Waterball by ABM (sticker on the pcb 12-3-96)
The pcb has some empty sockets, maybe it was used for other games since it has no markings.

The game has fonts identical to World Rally and obviously Blomby Car ;)

1x 68k
1x oki 6295
1x OSC 30mhz
1x OSC 24mhz
1x FPGA
1x dispswitch

*/

ROM_START( watrball )
	ROM_REGION( 0x100000, "maincpu", 0 )        /* 68000 Code */
	ROM_LOAD16_BYTE( "rom4.bin", 0x000000, 0x020000, CRC(bfbfa720) SHA1(d6d14c0ba545eb7adee7190da2d3db1c6dd00d75) )
	ROM_LOAD16_BYTE( "rom6.bin", 0x000001, 0x020000, CRC(acff9b01) SHA1(b85671bcc4f03fdf05eb1c9b5d4143e33ec1d7db) )

	ROM_REGION( 0x200000, "sprites", 0 )    /* Sprites */
	ROM_LOAD( "rom7.bin",   0x000000, 0x080000, CRC(e7e5c311) SHA1(5af1a666bf23c5505d120d81fb942f5c49341861) )
	ROM_LOAD( "rom8.bin",   0x080000, 0x080000, CRC(fd27ce6e) SHA1(a472a8cc25818427d2870518649780146e51835b) )
	ROM_LOAD( "rom9.bin",   0x100000, 0x080000, CRC(122cc0ad) SHA1(27cdb19fa082089e47c5cdb44742cfd93aa23a00) )
	ROM_LOAD( "rom10.bin",  0x180000, 0x080000, CRC(22a2a706) SHA1(c7350a94a857e0007d7fc0076b44a3d62693cb6c) )

	ROM_REGION( 0x100000, "oki", 0 )    /* 8 bit adpcm (banked) */
	ROM_LOAD( "rom1.bin",     0x000000, 0x080000, CRC(7f88dee7) SHA1(d493b961fa4631185a33faee7f61786430707209))
//  ROM_LOAD( "rom2.bin",     0x080000, 0x080000, /* not populated for this game */ )
ROM_END


void blmbycar_state::init_blmbycar()
{
	uint16_t *RAM  = (uint16_t *) memregion("maincpu")->base();
	size_t size = memregion("maincpu")->bytes() / 2;
	for (int i = 0; i < size; i++)
	{
		uint16_t x = RAM[i];
		x = (x & ~0x0606) | ((x & 0x0202) << 1) | ((x & 0x0404) >> 1);
		RAM[i] = x;
	}
}

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


                                Game Drivers


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

GAME( 1994, blmbycar,  0,        blmbycar, blmbycar, blmbycar_state, init_blmbycar, ROT0, "ABM & Gecas", "Blomby Car (Version 1P0)", MACHINE_SUPPORTS_SAVE )
GAME( 1994, blmbycaru, blmbycar, blmbycar, blmbycar, blmbycar_state, empty_init,    ROT0, "ABM & Gecas", "Blomby Car (Version 1P0, not encrypted)", MACHINE_SUPPORTS_SAVE )
GAME( 1996, watrball,  0,        watrball, watrball, blmbycar_state, empty_init,    ROT0, "ABM",         "Water Balls", MACHINE_SUPPORTS_SAVE )
