/********************************************************************
G-Stream (c)2002 Oriental Soft Japan
Are 'Oriental Soft Japan' actually a Korean company?
Hyperstone based hardware
Simple Sprites (16x16x8bpp tiles)
3 Simple Tilemaps (32x32x8bpp tiles)
todo: sprite lag (sprites need buffering?)
sound banking
CPU: E1-32XT
Sound: 2x AD-65 (OKIM6295 clone)
Xtals: 1.000Mhz (near AD-65a)
16.000Mhz (near E1-32XT / u56.bin)
27.000Mhz (near GFX Section & 54.000Mhz)
54.000Mhz (near GFX Section & 27.000Mhz)
notes:
cpu #0 (PC=00002C34): unmapped program memory dword read from 515ECE48 & FFFFFFFF
what is this, buggy code?
Is there a problem with the OKI status reads for the AD-65 clone? the game reads
the status register all the time, causing severe slowdown etc, might be related to
bad OKI banking tho.
---
Dump Notes:::
G-Stream 2020, 2002 Oriental Soft Japan
Shooter from Oriental soft, heavy influence from XII Stag
as well as Trizeal. Three weapons may be carried and their
power controlled by picking up capsules of a specific colour.
Three capsule types:
. Red - Vulcan
. Green - Missiles
. Blue - Laser
Points are awarded by picking up medals which are released
from shot down enemies. The medal value and appearance is
increased as long as you don't miss any.
When enough medals have been picked up a "void" bomb becomes
available which when released (hold down main shot) will create
a circular "void". Enemy bullets which hit this "void" are transformed
into medals. If you place your ship inside this "void" it becomes
invulnerable like in XII Stag.
The game is powered by a HyperStone E1-32XT. A battery on the PCB
saves hi-scores. Hi-Scores can be reset by toggling switch S2.
Documentation:
Name Size CRC32
----------------------------------------
g-stream_demo.jpg 195939 0x37984e02
g-stream_title.jpg 152672 0xf7b9bfd3
g-stream_pcb.jpg 2563664 0x5ec864f3
Name Size CRC32 Chip Type
---------------------------------------------
gs_prg_02.bin 2097152 0x2f8a6bea 27C160
gs_gr_01.bin 2097152 0xb82cfab8 27C160
gs_gr_02.bin 2097152 0x37e19cbd 27C160
gs_gr_03.bin 2097152 0x1a3b2b11 27C160
gs_gr_04.bin 2097152 0xa4e8906c 27C160
gs_gr_05.bin 2097152 0xef283a73 27C160
gs_gr_06.bin 2097152 0xd4e3a2b2 27C160
gs_gr_07.bin 2097152 0x84e66fe1 27C160
gs_gr_08.bin 2097152 0xabd0d6aa 27C160
gs_gr_09.bin 2097152 0xf2c4fd77 27C160
gs_gr_10.bin 2097152 0xd696d15d 27C160
gs_gr_11.bin 2097152 0x946d71d1 27C160
gs_gr_12.bin 2097152 0x94b56e4e 27C160
gs_gr_13.bin 2097152 0x7daaeff0 27C160
gs_gr_14.bin 2097152 0x6bd2a1e1 27C160
gs_snd_01.bin 524288 0x79b64d3f 27C040
gs_snd_02.bin 524288 0xe49ed92c 27C040
gs_snd_03.bin 524288 0x2bfff4ac 27C040
gs_snd_04.bin 524288 0xb259de3b 27C040
u56.bin 524288 0x0d0c6a38 27C040
. Board supplied by Tormod
. Board dumped by Tormod
*********************************************************************/
#include "driver.h"
#include "cpu/e132xs/e132xs.h"
#include "sound/okim6295.h"
static UINT32 *gstream_vram;
static UINT32 *gstream_workram;
static tilemap *gstream_tilemap1;
static tilemap *gstream_tilemap2;
static tilemap *gstream_tilemap3;
static UINT32 tilemap1_scrollx, tilemap2_scrollx, tilemap3_scrollx;
static UINT32 tilemap1_scrolly, tilemap2_scrolly, tilemap3_scrolly;
static CUSTOM_INPUT( gstream_mirror_service_r )
{
int result;
/* PORT_SERVICE_NO_TOGGLE */
result = (input_port_read(field->port->machine, "IN0") & 0x8000) >> 15;
return ~result;
}
static CUSTOM_INPUT( gstream_mirror_r )
{
int result;
/* IPT_COIN1 */
result = ((input_port_read(field->port->machine, "IN0") & 0x200) >> 9)<<0;
/* IPT_COIN2 */
result |= ((input_port_read(field->port->machine, "IN1") & 0x200) >> 9)<<1;
/* IPT_START1 */
result |= ((input_port_read(field->port->machine, "IN0") & 0x400) >> 10)<<2;
/* IPT_START2 */
result |= ((input_port_read(field->port->machine, "IN1") & 0x400) >> 10)<<3;
/* PORT_SERVICE_NO_TOGGLE */
result |= ((input_port_read(field->port->machine, "IN0") & 0x8000) >> 15)<<6;
return ~result;
}
static WRITE32_HANDLER( gstream_palette_w )
{
COMBINE_DATA(&paletteram32[offset]);
palette_set_color_rgb(space->machine,offset*2,pal5bit(paletteram32[offset] >> (0+16)),
pal5bit(paletteram32[offset] >> (6+16)),
pal5bit(paletteram32[offset] >> (11+16)));
palette_set_color_rgb(space->machine,offset*2+1,pal5bit(paletteram32[offset] >> (0)),
pal5bit(paletteram32[offset] >> (6)),
pal5bit(paletteram32[offset] >> (11)));
}
static WRITE32_HANDLER( gstream_vram_w )
{
COMBINE_DATA(&gstream_vram[offset]);
if (ACCESSING_BITS_24_31)
{
if (offset>=0x000/4 && offset<0x400/4)
{
tilemap_mark_tile_dirty(gstream_tilemap1,offset-(0x000/4));
}
else if (offset>=0x400/4 && offset<0x800/4)
{
tilemap_mark_tile_dirty(gstream_tilemap2,offset-(0x400/4));
}
else if (offset>=0x800/4 && offset<0xc00/4)
{
tilemap_mark_tile_dirty(gstream_tilemap3,offset-(0x800/4));
}
}
}
static WRITE32_HANDLER( gstream_tilemap1_scrollx_w ) { tilemap1_scrollx = data; }
static WRITE32_HANDLER( gstream_tilemap1_scrolly_w ) { tilemap1_scrolly = data; }
static WRITE32_HANDLER( gstream_tilemap2_scrollx_w ) { tilemap2_scrollx = data; }
static WRITE32_HANDLER( gstream_tilemap2_scrolly_w ) { tilemap2_scrolly = data; }
static WRITE32_HANDLER( gstream_tilemap3_scrollx_w ) { tilemap3_scrollx = data; }
static WRITE32_HANDLER( gstream_tilemap3_scrolly_w ) { tilemap3_scrolly = data; }
static ADDRESS_MAP_START( gstream_32bit_map, ADDRESS_SPACE_PROGRAM, 32 )
AM_RANGE(0x00000000, 0x003FFFFF) AM_RAM AM_BASE(&gstream_workram) // work ram
// AM_RANGE(0x40000000, 0x40FFFFFF) AM_RAM // ?? lots of data gets copied here if present, but game runs without it??
AM_RANGE(0x80000000, 0x80003FFF) AM_RAM_WRITE(gstream_vram_w) AM_BASE(&gstream_vram) // video ram
AM_RANGE(0x4E000000, 0x4E1FFFFF) AM_ROM AM_REGION("user2",0) // main game rom
AM_RANGE(0x4F000000, 0x4F000003) AM_WRITE(gstream_tilemap3_scrollx_w)
AM_RANGE(0x4F200000, 0x4F200003) AM_WRITE(gstream_tilemap3_scrolly_w)
AM_RANGE(0x4F400000, 0x4F406FFF) AM_RAM_WRITE(gstream_palette_w) AM_BASE(&paletteram32)
AM_RANGE(0x4F800000, 0x4F800003) AM_WRITE(gstream_tilemap1_scrollx_w)
AM_RANGE(0x4FA00000, 0x4FA00003) AM_WRITE(gstream_tilemap1_scrolly_w)
AM_RANGE(0x4FC00000, 0x4FC00003) AM_WRITE(gstream_tilemap2_scrollx_w)
AM_RANGE(0x4FE00000, 0x4FE00003) AM_WRITE(gstream_tilemap2_scrolly_w)
AM_RANGE(0xFFC00000, 0xFFC01FFF) AM_RAM AM_BASE(&generic_nvram32) AM_SIZE(&generic_nvram_size) // Backup RAM
AM_RANGE(0xFFF80000, 0xFFFFFFFF) AM_ROM AM_REGION("user1",0) // boot rom
ADDRESS_MAP_END
static WRITE32_HANDLER( gstream_oki_banking_w )
{
/* OKI BANKING (still far from perfect, based on game behaviour)
The two okis can indifferently play music or samples and are switched on the fly during game
This is a preliminary table of the banks:
BANK MUSIC SAMPLES
0 X
1 X
2 X
3 X
4 X
5 X
6 X
7 X
Two nibbles are used in this handler: (data & 0xf) and ((data >> 4) & 0xf)
The values for the first nibble are the followings and should map the 8 oki banks:
- 0x6, 0x7, 0x9, 0xa, 0xb, 0xd, 0xe, 0xf
The values for the second nibble are the followings and should probably be used too:
- 0x6, 0x9, 0xa
Same values are redudant, for example:
level 2: data = 0x99
level 6: data = 0x99
(this means same background music for the two levels - it could be correct, though)
Also with current implementation, using only (data & 0xf), we have to force some values
manually, because the correspondent places in the table are already used
Musics order is completely guessed but close to what the original PCB game should be */
static const int bank_table_0[16] = { -1, -1, -1, -1, -1, -1, 0, 0, -1, 6, 0, 5, -1, 0, 0, 0 };
static const int bank_table_1[16] = { -1, -1, -1, -1, -1, -1, 2, 2, -1, 0, 0, 4, -1, 1, 1, 1 };
static int bank_0 = 0;
static int bank_1 = 0;
//popmessage("oki_0 banking value = %X\noki_1 banking value = %X\n",data & 0xf,(data >> 4) & 0xf);
bank_0 = bank_table_0[data & 0xf];
bank_1 = bank_table_1[data & 0xf]; // (data >> 4) & 0xf ??
/* some values are already used in the table, so we force them manually */
if ((data == 0x6f) || (data == 0x6e))
{
bank_0 = 0; // level 3b-5a samples
bank_1 = 6; // level 3b-5a music
}
if (data == 0x9b)
{
bank_0 = 7; // level 7 music
bank_1 = 0; // level 7 samples
}
if (data == 0x9f)
{
bank_0 = 0; // end sequence samples
bank_1 = 3; // end sequence music
}
okim6295_set_bank_base(devtag_get_device(space->machine, "oki1"), bank_0 * 0x40000);
okim6295_set_bank_base(devtag_get_device(space->machine, "oki2"), bank_1 * 0x40000);
}
static WRITE32_HANDLER( gstream_oki_4040_w )
{
// data == 0 or data == 0x81
}
static ADDRESS_MAP_START( gstream_io, ADDRESS_SPACE_IO, 32 )
AM_RANGE(0x4000, 0x4003) AM_READ_PORT("IN0")
AM_RANGE(0x4010, 0x4013) AM_READ_PORT("IN1")
AM_RANGE(0x4020, 0x4023) AM_READ_PORT("IN2") // extra coin switches etc
AM_RANGE(0x4030, 0x4033) AM_WRITE(gstream_oki_banking_w) // oki banking
AM_RANGE(0x4040, 0x4043) AM_WRITE(gstream_oki_4040_w) // ??
AM_RANGE(0x4050, 0x4053) AM_DEVREADWRITE8("oki2", okim6295_r, okim6295_w, 0x000000ff) // music and samples
AM_RANGE(0x4060, 0x4063) AM_DEVREADWRITE8("oki1", okim6295_r, okim6295_w, 0x000000ff) // music and samples
ADDRESS_MAP_END
static INPUT_PORTS_START( gstream )
PORT_START("IN0")
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_LEFT ) PORT_PLAYER(1)
PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(1)
PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(1)
PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_START1 )
PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_SERVICE1 )
PORT_BIT( 0x7000, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_SERVICE_NO_TOGGLE( 0x8000, IP_ACTIVE_LOW )
PORT_START("IN1")
PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2)
PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2)
PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_START2 )
PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_SERVICE2 )
PORT_BIT( 0x7000, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_SPECIAL ) PORT_CUSTOM(gstream_mirror_service_r, NULL)
PORT_START("IN2")
PORT_BIT( 0x004f, IP_ACTIVE_LOW, IPT_SPECIAL ) PORT_CUSTOM(gstream_mirror_r, NULL)
PORT_BIT( 0xffb0, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END
static const gfx_layout layout16x16 =
{
16,16,
RGN_FRAC(1,1),
8,
{ 0,1,2,3,4,5,6,7 },
{ 0,8,16,24, 32,40,48,56, 64,72,80,88 ,96,104,112,120 },
{ 0*128, 1*128, 2*128, 3*128, 4*128, 5*128, 6*128, 7*128, 8*128,9*128,10*128,11*128,12*128,13*128,14*128,15*128 },
16*128,
};
static const gfx_layout layout32x32 =
{
32,32,
RGN_FRAC(1,1),
8,
{ 0,1,2,3,4,5,6,7 },
{ 0, 8, 16, 24, 32, 40, 48, 56,
64, 72, 80, 88, 96, 104, 112, 120,
128, 136, 144, 152, 160, 168, 176, 184,
192, 200, 208, 216, 224, 232, 240, 248 },
{ 0*256, 1*256, 2*256, 3*256, 4*256, 5*256, 6*256, 7*256,
8*256, 9*256, 10*256, 11*256, 12*256, 13*256, 14*256, 15*256,
16*256, 17*256, 18*256, 19*256, 20*256, 21*256, 22*256, 23*256,
24*256, 25*256, 26*256, 27*256, 28*256, 29*256, 30*256, 31*256,
},
32*256,
};
static GFXDECODE_START( gstream )
GFXDECODE_ENTRY( "gfx2", 0, layout32x32, 0, 0x80 )
GFXDECODE_ENTRY( "gfx1", 0, layout16x16, 0, 0x80 )
GFXDECODE_END
static TILE_GET_INFO( get_gs1_tile_info )
{
int tileno, palette;
tileno = (gstream_vram[tile_index+0x000/4]&0x0fff0000)>>16;
palette = (gstream_vram[tile_index+0x000/4]&0xc0000000)>>30;
SET_TILE_INFO(0,tileno,palette+0x10,0);
}
static TILE_GET_INFO( get_gs2_tile_info )
{
int tileno, palette;
tileno = (gstream_vram[tile_index+0x400/4]&0x0fff0000)>>16;
palette =(gstream_vram[tile_index+0x400/4]&0xc0000000)>>30;
SET_TILE_INFO(0,tileno+0x1000,palette+0x14,0);
}
static TILE_GET_INFO( get_gs3_tile_info )
{
int tileno, palette;
tileno = (gstream_vram[tile_index+0x800/4]&0x0fff0000)>>16;
palette =(gstream_vram[tile_index+0x800/4]&0xc0000000)>>30;
SET_TILE_INFO(0,tileno+0x2000,palette+0x18,0);
}
static VIDEO_START(gstream)
{
gstream_tilemap1 = tilemap_create(machine, get_gs1_tile_info,tilemap_scan_rows, 32, 32,16,16);
gstream_tilemap2 = tilemap_create(machine, get_gs2_tile_info,tilemap_scan_rows, 32, 32,16,16);
gstream_tilemap3 = tilemap_create(machine, get_gs3_tile_info,tilemap_scan_rows, 32, 32,16,16);
tilemap_set_transparent_pen(gstream_tilemap1,0);
tilemap_set_transparent_pen(gstream_tilemap2,0);
}
static VIDEO_UPDATE(gstream)
{
/* The tilemaps and sprite sre interleaved together.
Even Words are tilemap tiles
Odd Words are sprite data
Sprites start at the top of memory, tilemaps at
the bottom, but the areas can overlap
*What seems an actual game bug*
when a sprite ends up with a negative co-ordinate
a value of 0xfffffffe gets set in the sprite list.
this could corrupt the tile value as both words
are being set ?!
*/
int i;
//popmessage("(1) %08x %08x (2) %08x %08x (3) %08x %08x", tilemap1_scrollx, tilemap1_scrolly, tilemap2_scrollx, tilemap2_scrolly, tilemap3_scrollx, tilemap3_scrolly );
tilemap_set_scrollx( gstream_tilemap3, 0, tilemap3_scrollx>>16 );
tilemap_set_scrolly( gstream_tilemap3, 0, tilemap3_scrolly>>16 );
tilemap_set_scrollx( gstream_tilemap1, 0, tilemap1_scrollx>>16 );
tilemap_set_scrolly( gstream_tilemap1, 0, tilemap1_scrolly>>16 );
tilemap_set_scrollx( gstream_tilemap2, 0, tilemap2_scrollx>>16 );
tilemap_set_scrolly( gstream_tilemap2, 0, tilemap2_scrolly>>16 );
tilemap_draw(bitmap,cliprect,gstream_tilemap3,0,0);
tilemap_draw(bitmap,cliprect,gstream_tilemap2,0,0);
tilemap_draw(bitmap,cliprect,gstream_tilemap1,0,0);
for (i=0x0000/4;i<0x4000/4;i+=4)
{
/* Upper bits are used by the tilemaps */
int code = gstream_vram[i+0] & 0xffff;
int x = gstream_vram[i+1] & 0xffff;
int y = gstream_vram[i+2] & 0xffff;
int col = gstream_vram[i+3] & 0x1f;
/* co-ordinates are signed */
if (x & 0x8000) x-=0x10000;
if (y & 0x8000) y-=0x10000;
drawgfx(bitmap,screen->machine->gfx[1],code,col,0,0,x-2,y,cliprect,TRANSPARENCY_PEN,0);
}
return 0;
}
static MACHINE_DRIVER_START( gstream )
MDRV_CPU_ADD("maincpu", E132XT, 16000000*4) /* 4x internal multiplier */
MDRV_CPU_PROGRAM_MAP(gstream_32bit_map,0)
MDRV_CPU_IO_MAP(gstream_io,0)
MDRV_CPU_VBLANK_INT("screen", irq0_line_hold)
/* video hardware */
MDRV_SCREEN_ADD("screen", RASTER)
MDRV_SCREEN_REFRESH_RATE(60)
MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
MDRV_SCREEN_SIZE(320, 240)
MDRV_SCREEN_VISIBLE_AREA(0, 319, 0, 239)
MDRV_PALETTE_LENGTH(0x1000 + 0x400 + 0x400 + 0x400) // sprites + 3 bg layers
MDRV_GFXDECODE(gstream)
MDRV_NVRAM_HANDLER(generic_1fill)
MDRV_VIDEO_START(gstream)
MDRV_VIDEO_UPDATE(gstream)
MDRV_SPEAKER_STANDARD_MONO("mono")
MDRV_SOUND_ADD("oki1", OKIM6295, 1000000) /* 1 Mhz? */
MDRV_SOUND_CONFIG(okim6295_interface_pin7high) // pin 7 not verified
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MDRV_SOUND_ADD("oki2", OKIM6295, 1000000) /* 1 Mhz? */
MDRV_SOUND_CONFIG(okim6295_interface_pin7high) // pin 7 not verified
MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MACHINE_DRIVER_END
ROM_START( gstream )
ROM_REGION32_BE( 0x080000, "user1", 0 ) /* Hyperstone CPU Code */
ROM_LOAD( "u56.bin", 0x000000, 0x080000, CRC(0d0c6a38) SHA1(a810bfc1c9158cccc37710d0ea7268e26e520cc2) )
ROM_REGION32_BE( 0x200000, "user2", 0 ) /* Hyperstone CPU Code */
ROM_LOAD16_WORD_SWAP( "gs_prg_02.bin", 0x000000, 0x200000, CRC(2f8a6bea) SHA1(c0a32838f4bd8599f09002139f87562db625c1c5) )
ROM_REGION( 0x1000000, "gfx1", ROMREGION_DISPOSE ) /* sprite tiles (16x16x8) */
ROM_LOAD32_WORD( "gs_gr_07.bin", 0x000000, 0x200000, CRC(84e66fe1) SHA1(73d828714f9ed9baffdc06998f5bf3298396fe9c) )
ROM_LOAD32_WORD( "gs_gr_11.bin", 0x000002, 0x200000, CRC(946d71d1) SHA1(516bd3f4d7f5bce59f0593ed6565114dbd5a4ef0) )
ROM_LOAD32_WORD( "gs_gr_08.bin", 0x400000, 0x200000, CRC(abd0d6aa) SHA1(dd294bbdda05697df84247257f735ab51bc26ca3) )
ROM_LOAD32_WORD( "gs_gr_12.bin", 0x400002, 0x200000, CRC(94b56e4e) SHA1(7c3877f993e575326dbd4c2e5d7570747277b20d) )
ROM_LOAD32_WORD( "gs_gr_09.bin", 0x800000, 0x200000, CRC(f2c4fd77) SHA1(284c850688e3c0fd292a91a53e24fe3436dc4076) )
ROM_LOAD32_WORD( "gs_gr_13.bin", 0x800002, 0x200000, CRC(7daaeff0) SHA1(5766d9a3a8c0931305424e0089108ce8df7dfe41) )
ROM_LOAD32_WORD( "gs_gr_10.bin", 0xc00000, 0x200000, CRC(d696d15d) SHA1(85aaa5cdb35f3a8d3266bb8debec0558c860cb53) )
ROM_LOAD32_WORD( "gs_gr_14.bin", 0xc00002, 0x200000, CRC(6bd2a1e1) SHA1(aedca91643f14ececc101a7708255ce9b1d70f68) )
ROM_REGION( 0xc00000, "gfx2", ROMREGION_DISPOSE ) /* bg tiles (32x32x8) */
ROM_LOAD( "gs_gr_01.bin", 0x000000, 0x200000, CRC(b82cfab8) SHA1(08f0eaef5c927fb056c6cc9342e39f445aae9062) )
ROM_LOAD( "gs_gr_02.bin", 0x200000, 0x200000, CRC(37e19cbd) SHA1(490ebb037fce09100ec4bba3f73ecdf101526641) )
ROM_LOAD( "gs_gr_03.bin", 0x400000, 0x200000, CRC(1a3b2b11) SHA1(a4b1dc1a9709f8f8f2ab2190d7badc246caa540f) )
ROM_LOAD( "gs_gr_04.bin", 0x600000, 0x200000, CRC(a4e8906c) SHA1(b285d7697cdaa62014cf65d09a19fcbd6a95bb98) )
ROM_LOAD( "gs_gr_05.bin", 0x800000, 0x200000, CRC(ef283a73) SHA1(8b598facb344eac33138611abc141a2acb375983) )
ROM_LOAD( "gs_gr_06.bin", 0xa00000, 0x200000, CRC(d4e3a2b2) SHA1(4577c007172c718bf7ca55a8ccee5455c281026c) )
ROM_REGION( 0x200000, "oki1", 0 )
ROM_LOAD( "gs_snd_01.bin", 0x000000, 0x080000, CRC(79b64d3f) SHA1(b2166210d3a3b85b9ace90749a444c881f69d551) )
ROM_LOAD( "gs_snd_02.bin", 0x080000, 0x080000, CRC(e49ed92c) SHA1(a3d7b3fe93a786a246acf2657d9056398c793078) )
ROM_LOAD( "gs_snd_03.bin", 0x100000, 0x080000, CRC(2bfff4ac) SHA1(cce1bb3c78b86722c926854c737f9589806012ba) )
ROM_LOAD( "gs_snd_04.bin", 0x180000, 0x080000, CRC(b259de3b) SHA1(1a64f41d4344fefad5832332f1a7655e23f6b017) )
ROM_REGION( 0x200000, "oki2", 0 )
ROM_COPY( "oki1", 0, 0, 0x200000 )
ROM_END
static READ32_HANDLER( gstream_speedup_r )
{
if (cpu_get_pc(space->cpu)==0xc0001592)
{
cpu_eat_cycles(space->cpu, 50);
}
return gstream_workram[0xd1ee0/4];
}
static DRIVER_INIT( gstream )
{
memory_install_read32_handler(cpu_get_address_space(machine->cpu[0], ADDRESS_SPACE_PROGRAM), 0xd1ee0, 0xd1ee3, 0, 0, gstream_speedup_r );
}
GAME( 2002, gstream, 0, gstream, gstream, gstream, ROT270, "Oriental Soft Japan", "G-Stream G2020", GAME_IMPERFECT_SOUND )