// license:BSD-3-Clause
// copyright-holders:Andrew Gardner
/*
Sega GP World hardware
Driver by Andrew Gardner with help from Daphne Source.
Notes:
- GP World is a rare game that came in a huge cabinet with two monitors, side by side.
The image from the laserdisc was stretched to an 8x3 aspect and graphics were overlayed
on top.
- The hardware is similar to Astron Belt but somewhat more powerful.
ToDo:
- Hook up start lamp to mame lamp system
- Do the gear shifter right
- What's up with the pedals being tied together?
- Daphne says this game is dual monitor. Is it?
- Finish sprite drawing - looks awfully similar to system1 and suprloco.
- Palette!
- Still some undocumented reads and writes - likely dealing with I/O.
- Convert to tilemaps.
Dumping Notes:
GP World by Sega - Dumped by Matteo Marioni on Dec, 21 2001
834-5515-01
GP WORLD P.
SEGA No. 123743
Chip Label
82S123 PR6146, PR6147
27128 EPR-6162A (the "A" letter is handwritten), EPR-6163, EPR-6164, EPR-6157, EPR-6155, EPR-6153
EPR-6151, EPR-6149, EPR-6158, EPR-6156, EPR-6154, EPR-6152, EPR-6150
2732 EPR-6148
82S129 PR-5501 (located on video overlay pcb [834-5175])
(not dumped)
DMPAL16R6JC 315-5072.ic9, 315-5071.ic10
DMPAL12H6JC 315-5070.ic97
*/
#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/ldv1000.h"
#include "speaker.h"
class gpworld_state : public driver_device
{
public:
enum
{
TIMER_IRQ_STOP
};
gpworld_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_laserdisc(*this, "laserdisc") ,
m_sprite_ram(*this, "sprite_ram"),
m_palette_ram(*this, "palette_ram"),
m_tile_ram(*this, "tile_ram"),
m_maincpu(*this, "maincpu"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette") { }
uint8_t m_nmi_enable;
uint8_t m_start_lamp;
uint8_t m_ldp_read_latch;
uint8_t m_ldp_write_latch;
uint8_t m_brake_gas;
emu_timer *m_irq_stop_timer;
required_device<pioneer_ldv1000_device> m_laserdisc;
required_shared_ptr<uint8_t> m_sprite_ram;
required_shared_ptr<uint8_t> m_palette_ram;
required_shared_ptr<uint8_t> m_tile_ram;
DECLARE_READ8_MEMBER(ldp_read);
DECLARE_READ8_MEMBER(pedal_in);
DECLARE_WRITE8_MEMBER(ldp_write);
DECLARE_WRITE8_MEMBER(misc_io_write);
DECLARE_WRITE8_MEMBER(brake_gas_write);
DECLARE_WRITE8_MEMBER(palette_write);
void init_gpworld();
virtual void machine_start() override;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
INTERRUPT_GEN_MEMBER(vblank_callback);
void draw_tiles(bitmap_rgb32 &bitmap,const rectangle &cliprect);
inline void draw_pixel(bitmap_rgb32 &bitmap,const rectangle &cliprect,int x,int y,int color,int flip);
void draw_sprites(bitmap_rgb32 &bitmap, const rectangle &cliprect);
required_device<cpu_device> m_maincpu;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
void gpworld(machine_config &config);
void mainmem(address_map &map);
void mainport(address_map &map);
protected:
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
};
/* Assumed to be the same as segald hardware */
#define GUESSED_CLOCK (5000000)
/* VIDEO GOODS */
void gpworld_state::draw_tiles(bitmap_rgb32 &bitmap,const rectangle &cliprect)
{
uint8_t characterX, characterY;
/* Temporarily set to 64 wide to accommodate two screens */
for (characterX = 0; characterX < 64; characterX++)
{
for (characterY = 0; characterY < 32; characterY++)
{
int current_screen_character = (characterY*64) + characterX;
m_gfxdecode->gfx(0)->transpen(bitmap,cliprect, m_tile_ram[current_screen_character],
characterY, 0, 0, characterX*8, characterY*8, 0);
}
}
}
void gpworld_state::draw_pixel(bitmap_rgb32 &bitmap,const rectangle &cliprect,int x,int y,int color,int flip)
{
if (flip)
{
x = bitmap.width() - x - 1;
y = bitmap.height() - y - 1;
}
if (cliprect.contains(x, y))
bitmap.pix32(y, x) = m_palette->pen(color);
}
void gpworld_state::draw_sprites(bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
const int SPR_Y_TOP = 0;
const int SPR_Y_BOTTOM = 1;
const int SPR_X_LO = 2;
const int SPR_X_HI = 3;
const int SPR_SKIP_LO = 4;
const int SPR_SKIP_HI = 5;
const int SPR_GFXOFS_LO = 6;
const int SPR_GFXOFS_HI = 7;
int flip = flip_screen();
int i;
uint8_t *GFX = memregion("gfx2")->base();
/* Heisted from Daphne which heisted it from MAME */
for (i = 0; i < 0x800; i += 8)
{
uint8_t *spr_reg = m_sprite_ram + i;
if (spr_reg[SPR_Y_BOTTOM] && spr_reg[SPR_X_LO] != 0xff)
{
int row;
int src = spr_reg[SPR_GFXOFS_LO] + (spr_reg[SPR_GFXOFS_HI] << 8);
int skip = spr_reg[SPR_SKIP_LO] + (spr_reg[SPR_SKIP_HI] << 8);
int height = spr_reg[SPR_Y_BOTTOM] - spr_reg[SPR_Y_TOP];
int sy = spr_reg[SPR_Y_TOP] + 1;
int sx = spr_reg[SPR_X_LO] + ((spr_reg[SPR_X_HI] & 0x01) << 8) ;
int sprite_color = (spr_reg[SPR_X_HI] >> 4) & 0x0f;
int sprite_bank = (spr_reg[SPR_X_HI] >> 1) & 0x07;
/*
logerror("%x - %x = %x\n", spr_reg[SPR_Y_BOTTOM], spr_reg[SPR_Y_TOP], height);
logerror("Draw Sprite #%x with src %x, skip %x, height %x, y %x, x %x\n", i/8, src, skip, height, sy, sx);
logerror("%02x %02x %02x %02x %02x %02x %02x %02x\n", spr_reg[SPR_Y_TOP], spr_reg[SPR_Y_BOTTOM], spr_reg[SPR_X_LO], spr_reg[SPR_X_HI],
spr_reg[SPR_SKIP_LO], spr_reg[SPR_SKIP_HI], spr_reg[SPR_GFXOFS_LO], spr_reg[SPR_GFXOFS_HI]);
draw_pixel(bitmap,cliprect,sx,sy,0xffffffff,flip);
*/
for (row = 0; row < height; row++)
{
int x, y;
int src2;
src = src2 = src + skip;
x = sx;
y = sy+row;
while (1)
{
int data_lo, data_high;
uint8_t pixel1, pixel2, pixel3, pixel4;
data_lo = GFX[(src2 & 0x7fff) | (sprite_bank << 16)];
data_high = GFX[(src2 & 0x7fff) | 0x8000 | (sprite_bank << 16)];
pixel1 = data_high >> 0x04;
pixel2 = data_high & 0x0f;
pixel3 = data_lo >> 0x04;
pixel4 = data_lo & 0x0f;
/* we'll see if this is still applicable */
if (src & 0x8000)
{
uint8_t temp_pixel;
temp_pixel = pixel1;
pixel1 = pixel4;
pixel4 = temp_pixel;
temp_pixel = pixel2;
pixel2 = pixel3;
pixel3 = temp_pixel;
src2--;
}
else
{
src2++;
}
/* Daphne says "don't draw the pixel if it's black". */
draw_pixel(bitmap,cliprect,x+0,y,m_palette->pen_color(pixel1 + (sprite_color*0x10 + 0x200)),flip);
draw_pixel(bitmap,cliprect,x+1,y,m_palette->pen_color(pixel2 + (sprite_color*0x10 + 0x200)),flip);
draw_pixel(bitmap,cliprect,x+2,y,m_palette->pen_color(pixel3 + (sprite_color*0x10 + 0x200)),flip);
draw_pixel(bitmap,cliprect,x+3,y,m_palette->pen_color(pixel4 + (sprite_color*0x10 + 0x200)),flip);
x += 4;
/* stop drawing when the sprite data is 0xf */
if (((data_lo & 0x0f) == 0x0f) && (!(src & 0x8000)))
{
break;
}
else if ((src & 0x8000) && ((data_high & 0xf0) == 0xf0))
{
break;
}
}
}
}
}
}
uint32_t gpworld_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
bitmap.fill(0, cliprect);
draw_tiles(bitmap, cliprect);
draw_sprites(bitmap, cliprect);
return 0;
}
void gpworld_state::machine_start()
{
m_irq_stop_timer = timer_alloc(TIMER_IRQ_STOP);
}
/* MEMORY HANDLERS */
/* READS */
READ8_MEMBER(gpworld_state::ldp_read)
{
return m_ldp_read_latch;
}
READ8_MEMBER(gpworld_state::pedal_in)
{
if (m_brake_gas)
return ioport("INACCEL")->read();
return ioport("INBRAKE")->read();
}
/* WRITES */
WRITE8_MEMBER(gpworld_state::ldp_write)
{
m_ldp_write_latch = data;
}
WRITE8_MEMBER(gpworld_state::misc_io_write)
{
m_start_lamp = (data & 0x04) >> 1;
m_nmi_enable = (data & 0x40) >> 6;
/* dunno = (data & 0x80) >> 7; */ //coin counter???
logerror("NMI : %x (0x%x)\n", m_nmi_enable, data);
}
WRITE8_MEMBER(gpworld_state::brake_gas_write)
{
m_brake_gas = data & 0x01;
}
WRITE8_MEMBER(gpworld_state::palette_write)
{
/* This is all just a (bad) guess */
int pal_index, r, g, b, a;
m_palette_ram[offset] = data;
/* "Round down" to the nearest palette entry */
pal_index = offset & 0xffe;
g = (m_palette_ram[pal_index] & 0xf0) << 0;
b = (m_palette_ram[pal_index] & 0x0f) << 4;
r = (m_palette_ram[pal_index+1] & 0x0f) << 4;
a = (m_palette_ram[pal_index+1] & 0x80) ? 0 : 255; /* guess */
/* logerror("PAL WRITE index : %x rgb : %d %d %d (real %x) at %x\n", pal_index, r,g,b, data, offset); */
m_palette->set_pen_color((pal_index & 0xffe) >> 1, rgb_t(a, r, g, b));
}
/* PROGRAM MAP */
void gpworld_state::mainmem(address_map &map)
{
map(0x0000, 0xbfff).rom();
map(0xc000, 0xc7ff).ram().share("sprite_ram");
map(0xc800, 0xcfff).ram().w(this, FUNC(gpworld_state::palette_write)).share("palette_ram"); /* The memory test reads at 0xc800 */
map(0xd000, 0xd7ff).ram().share("tile_ram");
map(0xd800, 0xd800).rw(this, FUNC(gpworld_state::ldp_read), FUNC(gpworld_state::ldp_write));
/* AM_RANGE(0xd801,0xd801) AM_READ(???) */
map(0xda00, 0xda00).portr("INWHEEL"); //8255 here....
/* AM_RANGE(0xda01,0xda01) AM_WRITE(???) */ /* These inputs are interesting - there are writes and reads all over these addr's */
map(0xda02, 0xda02).w(this, FUNC(gpworld_state::brake_gas_write)); /*bit 0 select gas/brake input */
map(0xda20, 0xda20).r(this, FUNC(gpworld_state::pedal_in));
map(0xe000, 0xffff).ram(); /* Potentially not all work RAM? */
}
/* I/O MAP */
void gpworld_state::mainport(address_map &map)
{
map.global_mask(0xff);
map(0x01, 0x01).w(this, FUNC(gpworld_state::misc_io_write));
map(0x80, 0x80).portr("IN0");
map(0x81, 0x81).portr("IN1");
map(0x82, 0x82).portr("DSW1");
map(0x83, 0x83).portr("DSW2");
}
/* PORTS */
static INPUT_PORTS_START( gpworld )
PORT_START("IN0")
PORT_BIT ( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT ( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT ( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT ( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "SHIFT" ) PORT_CODE( KEYCODE_Q )
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("IN1")
PORT_BIT ( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT ( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) /* maybe? it's not listed in the test screen. */
PORT_BIT ( 0x04, IP_ACTIVE_LOW, IPT_SERVICE )
PORT_BIT ( 0x08, IP_ACTIVE_LOW, IPT_SERVICE1 )
PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_START1 )
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("INWHEEL")
PORT_BIT ( 0x01, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "SLIGHT RIGHT" ) PORT_CODE( KEYCODE_Y )
PORT_BIT ( 0x02, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "MEDIUM RIGHT" ) PORT_CODE( KEYCODE_U )
PORT_BIT ( 0x04, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "STRONG RIGHT" ) PORT_CODE( KEYCODE_I )
PORT_BIT ( 0x08, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "FIERCE RIGHT" ) PORT_CODE( KEYCODE_O )
PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "SLIGHT LEFT" ) PORT_CODE( KEYCODE_T )
PORT_BIT ( 0x20, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "MEDIUM LEFT" ) PORT_CODE( KEYCODE_R )
PORT_BIT ( 0x40, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "STRONG LEFT" ) PORT_CODE( KEYCODE_E )
PORT_BIT ( 0x80, IP_ACTIVE_LOW, IPT_OTHER ) PORT_NAME( "FIERCE LEFT" ) PORT_CODE( KEYCODE_W )
PORT_START("INACCEL")
PORT_BIT( 0xff, 0x00, IPT_PEDAL ) PORT_SENSITIVITY(30) PORT_KEYDELTA(10) PORT_PLAYER(1)
PORT_START("INBRAKE")
PORT_BIT( 0xff, 0x00, IPT_PEDAL2 ) PORT_SENSITIVITY(30) PORT_KEYDELTA(10) PORT_PLAYER(1)
PORT_START("DSW1")
PORT_DIPNAME( 0xf0, 0xf0, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:1,2,3,4")
PORT_DIPSETTING( 0x70, DEF_STR( 4C_1C ) )
PORT_DIPSETTING( 0x80, DEF_STR( 3C_1C ) )
PORT_DIPSETTING( 0x90, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x40, DEF_STR( 4C_3C ) )
PORT_DIPSETTING( 0x50, "6 Coins/4 Credits" )
PORT_DIPSETTING( 0xf0, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x00, "1 Coin/1 Credit (again)" )
PORT_DIPSETTING( 0x30, "5 Coins/6 Credits" )
PORT_DIPSETTING( 0x20, DEF_STR( 4C_5C ) )
PORT_DIPSETTING( 0x10, DEF_STR( 2C_3C ) )
PORT_DIPSETTING( 0x60, "2 Coins/3 Credits (again)" )
PORT_DIPSETTING( 0xe0, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0xd0, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0xc0, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0xb0, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0xa0, DEF_STR( 1C_6C ) )
PORT_DIPNAME( 0x0f, 0x0f, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:5,6,7,8")
PORT_DIPSETTING( 0x07, DEF_STR( 4C_1C ) )
PORT_DIPSETTING( 0x08, DEF_STR( 3C_1C ) )
PORT_DIPSETTING( 0x09, DEF_STR( 2C_1C ) )
PORT_DIPSETTING( 0x04, DEF_STR( 4C_3C ) )
PORT_DIPSETTING( 0x05, "6 Coins/4 Credits" )
PORT_DIPSETTING( 0x0f, DEF_STR( 1C_1C ) )
PORT_DIPSETTING( 0x00, "1 Coin/1 Credit (again)" )
PORT_DIPSETTING( 0x03, "5 Coins/6 Credits" )
PORT_DIPSETTING( 0x02, DEF_STR( 4C_5C ) )
PORT_DIPSETTING( 0x01, DEF_STR( 2C_3C ) )
PORT_DIPSETTING( 0x06, "2 Coins/3 Credits (again)" )
PORT_DIPSETTING( 0x0e, DEF_STR( 1C_2C ) )
PORT_DIPSETTING( 0x0d, DEF_STR( 1C_3C ) )
PORT_DIPSETTING( 0x0c, DEF_STR( 1C_4C ) )
PORT_DIPSETTING( 0x0b, DEF_STR( 1C_5C ) )
PORT_DIPSETTING( 0x0a, DEF_STR( 1C_6C ) )
PORT_START("DSW2")
PORT_DIPNAME( 0x10, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:1")
PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x60, 0x60, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW2:2,3")
PORT_DIPSETTING( 0x40, DEF_STR( Easy ) )
PORT_DIPSETTING( 0x60, DEF_STR( Medium ) )
PORT_DIPSETTING( 0x20, DEF_STR( Hard ) )
PORT_DIPSETTING( 0x00, DEF_STR( Hardest ) )
PORT_DIPNAME( 0x80, 0x80, "Start Year #" ) PORT_DIPLOCATION("SW2:4")
PORT_DIPSETTING( 0x80, "1984" )
PORT_DIPSETTING( 0x00, "1985" )
PORT_DIPNAME( 0x01, 0x01, "Steering Difficulty" ) PORT_DIPLOCATION("SW2:5")
PORT_DIPSETTING( 0x01, DEF_STR( Medium ) )
PORT_DIPSETTING( 0x00, DEF_STR( Hard ) )
PORT_DIPNAME( 0x02, 0x02, "Rank to advance" ) PORT_DIPLOCATION("SW2:6")
PORT_DIPSETTING( 0x02, "Fourth" )
PORT_DIPSETTING( 0x00, "Third" )
PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) PORT_DIPLOCATION("SW2:7")
PORT_DIPSETTING( 0x04, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) PORT_DIPLOCATION("SW2:8")
PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
INPUT_PORTS_END
void gpworld_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_IRQ_STOP:
m_maincpu->set_input_line(0, CLEAR_LINE);
break;
default:
assert_always(false, "Unknown id in gpworld_state::device_timer");
}
}
INTERRUPT_GEN_MEMBER(gpworld_state::vblank_callback)
{
/* Do an NMI if the enabled bit is set */
if (m_nmi_enable)
{
m_laserdisc->data_w(m_ldp_write_latch);
m_ldp_read_latch = m_laserdisc->status_r();
device.execute().pulse_input_line(INPUT_LINE_NMI, attotime::zero);
}
/* The time the IRQ line stays high is set just long enough to happen after the NMI - hacky? */
device.execute().set_input_line(0, ASSERT_LINE);
m_irq_stop_timer->adjust(attotime::from_usec(100));
}
static const gfx_layout gpworld_tile_layout =
{
8,8,
0x800/8,
2,
{ 0x800*8, 0 },
{ 0,1,2,3,4,5,6,7 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
8*8
};
static GFXDECODE_START( gfx_gpworld )
GFXDECODE_ENTRY("gfx1", 0, gpworld_tile_layout, 0x0, 0x100)
GFXDECODE_END
/* DRIVER */
MACHINE_CONFIG_START(gpworld_state::gpworld)
/* main cpu */
MCFG_DEVICE_ADD("maincpu", Z80, GUESSED_CLOCK)
MCFG_DEVICE_PROGRAM_MAP(mainmem)
MCFG_DEVICE_IO_MAP(mainport)
MCFG_DEVICE_VBLANK_INT_DRIVER("screen", gpworld_state, vblank_callback)
MCFG_LASERDISC_LDV1000_ADD("laserdisc")
MCFG_LASERDISC_OVERLAY_DRIVER(512, 256, gpworld_state, screen_update)
MCFG_LASERDISC_OVERLAY_PALETTE("palette")
/* video hardware */
MCFG_LASERDISC_SCREEN_ADD_NTSC("screen", "laserdisc")
MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_gpworld)
MCFG_PALETTE_ADD("palette", 1024)
/* sound hardware */
SPEAKER(config, "lspeaker").front_left();
SPEAKER(config, "rspeaker").front_right();
MCFG_DEVICE_MODIFY("laserdisc")
MCFG_SOUND_ROUTE(0, "lspeaker", 1.0)
MCFG_SOUND_ROUTE(1, "rspeaker", 1.0)
MACHINE_CONFIG_END
ROM_START( gpworld )
ROM_REGION( 0xc000, "maincpu", 0 )
ROM_LOAD( "epr6162a.ic51", 0x0000, 0x4000, CRC(70e42574) SHA1(2fa50c7a67a2efb6b2c313850ace40e42d18b0a8) )
ROM_LOAD( "epr6163.ic67", 0x4000, 0x4000, CRC(49539e46) SHA1(7cfd5b6b356c3fa5439e6fe3ac2e6a097b722a2c) )
ROM_LOAD( "epr6164.ic83", 0x8000, 0x4000, CRC(7f0e6853) SHA1(c255ac6e4b61faa8da9b5aa70f12c868b81acfe1) )
/* Tiles */
ROM_REGION( 0x1000, "gfx1", 0 )
ROM_LOAD( "epr6148.ic18", 0x0000, 0x1000, CRC(a4b11cf5) SHA1(9697494335089b13071d773812eec373ef5b358c) )
/* Sprites */
ROM_REGION( 0x30000, "gfx2", 0 )
ROM_LOAD( "epr6149.ic111", 0x00000, 0x4000, CRC(7e6c4797) SHA1(acf934e1f3f55a0d1cd1630f6a78f9954f1ec53f) )
ROM_LOAD( "epr6151.ic110", 0x04000, 0x4000, CRC(26d72b96) SHA1(759ef85877edfc37f2a1a242bf1c9b0e8d5e9a88) )
ROM_LOAD( "epr6150.ic128", 0x08000, 0x4000, CRC(6837e095) SHA1(b2ac8341fcf0037d186b0759227597643ca0336d) )
ROM_LOAD( "epr6152.ic127", 0x0c000, 0x4000, CRC(86939fe2) SHA1(07527297262297562e052672976fd6f7124f5c7b) )
ROM_LOAD( "epr6153.ic109", 0x10000, 0x4000, CRC(f52b7c1b) SHA1(326c6b46e85ab12b43ae2b6b7a49055fe5c31431) )
ROM_LOAD( "epr6155.ic108", 0x14000, 0x4000, CRC(a020bd03) SHA1(13cd81dc2df185d9ec989e69261d275b46e44075) )
ROM_LOAD( "epr6154.ic126", 0x18000, 0x4000, CRC(bbf5d7db) SHA1(3dc50fa0dfe285cc741d9d6b9bac4a0ff6e3877f) )
ROM_LOAD( "epr6156.ic125", 0x1c000, 0x4000, CRC(2c03c64c) SHA1(fa31e49385e004b6fb81c8d54cc6b64dfe1358d2) )
ROM_LOAD( "epr6157.ic107", 0x20000, 0x4000, CRC(cdd31036) SHA1(722d843a1c524b0a689ab73bb7367c4ca33fc983) )
/* ic106 Unpopulated? */
ROM_LOAD( "epr6158.ic124", 0x28000, 0x4000, CRC(d15ac707) SHA1(170e0a851c3e845330f776a53ca619d16d025dd7) )
/* ic123 Unpopulated? */
/* Misc PROMs */
ROM_REGION( 0x0220, "proms", 0 )
ROM_LOAD( "pr6146.ic2", 0x000, 0x020, CRC(d10801a0) SHA1(89e9ac0d9c9eee6efd5455a3416c436ceda8f632) )
ROM_LOAD( "pr6147.ic28", 0x020, 0x100, CRC(b7173df9) SHA1(044beda43cb1793033021a08b3ee3441d5ffe6c3) )
ROM_LOAD( "pr5501.ic14", 0x120, 0x100, CRC(1bdf71d4) SHA1(ac52e948cce6df4abb7543c08e2c6454efd63e79) )
DISK_REGION( "laserdisc" )
DISK_IMAGE_READONLY( "gpworld", 0, NO_DUMP )
ROM_END
void gpworld_state::init_gpworld()
{
m_nmi_enable = 0;
m_start_lamp = 0;
m_brake_gas = 0;
m_ldp_write_latch = m_ldp_read_latch = 0;
}
/* YEAR NAME PARENT MACHINE INPUT STATE INIT MONITOR COMPANY FULLNAME FLAGS) */
GAME( 1984, gpworld, 0, gpworld, gpworld, gpworld_state, init_gpworld, ROT0, "Sega", "GP World", MACHINE_NOT_WORKING|MACHINE_NO_SOUND)