/*************************************************************************** Ground Effects / Super Ground FX (c) 1993 Taito Driver by Bryan McPhail & David Graves. Board Info: K1100744A J1100316A Sticker - K11J0744A ------------------------------------------------------------------------------------------------ | 2018 2088 43256 43256 MC68EC020RP25 DIP-SW (8) COM20020 SLIDE-SW LAN-IN | Connector G | 2018 2088 D51-21 D51-22 D51-14 | ----------- | 2018 2088 43256 43256 (PAL16L8) | Parts | Solder | D51-15 ADC0809 LAN-OUT | ------------------ | 2018 D51-23 D51-24 (PAL16L8) | GND 1 A GND | D51-16-1 JP4 | GND 2 B GND | 2018 TC0570SPC (PAL16L8) EEPROM.164 1-2 | +12 3 C +12 | 2018 2-3 | +5 4 D +5 | TC0510NIO 2-3 --| +5 5 E +5 | D51-13 D51-03 2-3 | +5 6 F +5 | D51-04 43256 1-2 | 7 H | TC0470LIN D51-05 1-2 --| +13 8 J +13 | D51-06 43256 TC0650FCA 1-2 | +13 9 K +13 | D51-07 2-3 | SPK_R+ 10 L SPK_R- | TC0580PIV 43256 43256 2018 2-3 | SPK_L+ 11 M SPK_L- | 43256 D51-17 | SPK_REAR- 12 N SPK_REAR- | 514256 TC0480SCP (PAL16L8) | 13 P | 514256 G| RED 14 R GREEN | 514256 D51-10 | BLUE 15 S SYNC | 514256 D51-09 D51-11 TC0620SCC | V-GND 16 T | 514256 D51-08 D51012 | METER1 17 U METER2 | 514256 43256 | LOCKOUT1 18 V LOCKOUT2 | MB8421 43256 | 19 W | D51-18 MB8421 ENSONIC --| COIN1 20 X COIN2 | (PAL20L8) D51-29 OTISR2 43256 MB87078 | SERVICE 21 Y TEST | D51-01 | 22 Z | D51-19 43256 ENSONIC ENSONIC --| SHIFT UP 23 a BRAKE | (PAL20L8) D51-02 SUPER GLU ESP-R6 TC511664 TL074 TL074 | HANDLE VR 24 b ACCEL VR | D51-30 | SHIFT DN 25 c | MC68000P12F16MHz TDA1543 TDA1543 | 26 d | 40MHz 16MHz 30.476MHz MC68681 | GND 27 e GND | D51-20 | GND 28 f GND | (PAL20L8) | ------------------------------------------------------------------------------------------------ Ground Effects combines the sprite system used in Taito Z games with the TC0480SCP tilemap chip plus some features from the Taito F3 system. It has an extra tilemap chip which is a dead ringer for the TC0100SCN (check the inits), like Under Fire. Ground Effects is effectively a 30Hz game - though the vblank interrupts still come in at 60Hz, the game uses a hardware frame counter to limit itself to 30Hz (it only updates things like the video registers every other vblank). There isn't enough cpu power in a 16MHz 68020 to run this game at 60Hz. Ground Effects has a network mode - probably uses IRQ 6 and the unknown ports at 0xc00000. ***************************************************************************/ #include "driver.h" #include "cpu/m68000/m68000.h" #include "video/taitoic.h" #include "machine/eeprom.h" #include "sound/es5506.h" #include "includes/taito_f3.h" #include "audio/taito_en.h" VIDEO_START( groundfx ); VIDEO_UPDATE( groundfx ); static UINT16 coin_word, frame_counter=0; static UINT16 port_sel = 0; extern UINT16 groundfx_rotate_ctrl[8]; static UINT32 *groundfx_ram; /*********************************************************** COLOR RAM Extract a standard version of this ("taito_8bpg_palette_word_w"?) to Taitoic.c ? ***********************************************************/ static WRITE32_HANDLER( color_ram_w ) { int a,r,g,b; COMBINE_DATA(&paletteram32[offset]); { a = paletteram32[offset]; r = (a &0xff0000) >> 16; g = (a &0xff00) >> 8; b = (a &0xff); palette_set_color(machine,offset,MAKE_RGB(r,g,b)); } } /*********************************************************** INTERRUPTS ***********************************************************/ static TIMER_CALLBACK( groundfx_interrupt5 ) { cpunum_set_input_line(machine, 0,5,HOLD_LINE); //from 5... ADC port } /********************************************************** EPROM **********************************************************/ static const UINT8 default_eeprom[128]= { 0x02,0x01,0x11,0x12,0x01,0x01,0x01,0x00,0x80,0x80,0x30,0x01,0x00,0x00,0x62,0x45, 0xe0,0xa0,0xff,0x28,0xff,0xff,0xfa,0xd7,0x33,0x28,0x00,0x00,0x33,0x28,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0xa0,0xff,0x28,0xff,0xff,0xff,0xff,0xfa,0xd7, 0x33,0x28,0x00,0x00,0x33,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff }; static const eeprom_interface groundfx_eeprom_interface = { 6, /* address bits */ 16, /* data bits */ "0110", /* read command */ "0101", /* write command */ "0111", /* erase command */ "0100000000", /* unlock command */ "0100110000", /* lock command */ }; static NVRAM_HANDLER( groundfx ) { if (read_or_write) eeprom_save(file); else { eeprom_init(&groundfx_eeprom_interface); if (file) eeprom_load(file); else eeprom_set_data(default_eeprom,128); /* Default the gun setup values */ } } /********************************************************** GAME INPUTS **********************************************************/ static CUSTOM_INPUT( frame_counter_r ) { return frame_counter; } static CUSTOM_INPUT( coin_word_r ) { return coin_word; } static WRITE32_HANDLER( groundfx_input_w ) { switch (offset) { case 0x00: { if (ACCESSING_BITS_24_31) /* $500000 is watchdog */ { watchdog_reset(machine); } if (ACCESSING_BITS_0_7) { eeprom_set_clock_line((data & 0x20) ? ASSERT_LINE : CLEAR_LINE); eeprom_write_bit(data & 0x40); eeprom_set_cs_line((data & 0x10) ? CLEAR_LINE : ASSERT_LINE); return; } return; } case 0x01: { if (ACCESSING_BITS_24_31) { coin_lockout_w(0,~data & 0x01000000); coin_lockout_w(1,~data & 0x02000000); coin_counter_w(0, data & 0x04000000); coin_counter_w(1, data & 0x08000000); coin_word = (data >> 16) &0xffff; } } } } static READ32_HANDLER( groundfx_adc_r ) { return (input_port_read(machine, "AN0") << 8) | input_port_read(machine, "AN1"); } static WRITE32_HANDLER( groundfx_adc_w ) { /* One interrupt per input port (4 per frame, though only 2 used). 1000 cycle delay is arbitrary */ timer_set(ATTOTIME_IN_CYCLES(1000,0), NULL, 0, groundfx_interrupt5); } static WRITE32_HANDLER( rotate_control_w ) /* only a guess that it's rotation */ { if (ACCESSING_BITS_0_15) { groundfx_rotate_ctrl[port_sel] = data; return; } if (ACCESSING_BITS_16_31) { port_sel = (data &0x70000) >> 16; } } static WRITE32_HANDLER( motor_control_w ) { /* Standard value poked is 0x00910200 (we ignore lsb and msb which seem to be always zero) 0x0, 0x8000 and 0x9100 are written at startup Two bits are written in test mode to this middle word to test gun vibration: ........ .x...... P1 gun vibration ........ x....... P2 gun vibration */ } /*********************************************************** MEMORY STRUCTURES ***********************************************************/ static ADDRESS_MAP_START( groundfx_readmem, ADDRESS_SPACE_PROGRAM, 32 ) AM_RANGE(0x000000, 0x1fffff) AM_READ(SMH_ROM) AM_RANGE(0x200000, 0x21ffff) AM_READ(SMH_RAM) /* main CPUA ram */ AM_RANGE(0x300000, 0x303fff) AM_READ(SMH_RAM) /* sprite ram */ AM_RANGE(0x500000, 0x500003) AM_READ_PORT("BUTTONS") AM_RANGE(0x500004, 0x500007) AM_READ_PORT("SYSTEM") AM_RANGE(0x600000, 0x600003) AM_READ(groundfx_adc_r) AM_RANGE(0x700000, 0x7007ff) AM_READ(SMH_RAM) AM_RANGE(0x800000, 0x80ffff) AM_READ(TC0480SCP_long_r) /* tilemaps */ AM_RANGE(0x830000, 0x83002f) AM_READ(TC0480SCP_ctrl_long_r) // debugging AM_RANGE(0x900000, 0x90ffff) AM_READ(TC0100SCN_long_r) /* piv tilemaps */ AM_RANGE(0x920000, 0x92000f) AM_READ(TC0100SCN_ctrl_long_r) AM_RANGE(0xa00000, 0xa0ffff) AM_READ(SMH_RAM) /* palette ram */ AM_RANGE(0xb00000, 0xb003ff) AM_READ(SMH_RAM) // ?? single bytes AM_RANGE(0xc00000, 0xc00007) AM_READ(SMH_NOP) /* Network? */ ADDRESS_MAP_END static ADDRESS_MAP_START( groundfx_writemem, ADDRESS_SPACE_PROGRAM, 32 ) AM_RANGE(0x000000, 0x1fffff) AM_WRITE(SMH_ROM) AM_RANGE(0x200000, 0x21ffff) AM_WRITE(SMH_RAM) AM_BASE(&groundfx_ram) AM_RANGE(0x300000, 0x303fff) AM_WRITE(SMH_RAM) AM_BASE(&spriteram32) AM_SIZE(&spriteram_size) AM_RANGE(0x400000, 0x400003) AM_WRITE(motor_control_w) /* gun vibration */ AM_RANGE(0x500000, 0x500007) AM_WRITE(groundfx_input_w) /* eeprom etc. */ AM_RANGE(0x600000, 0x600003) AM_WRITE(groundfx_adc_w) AM_RANGE(0x700000, 0x7007ff) AM_WRITE(SMH_RAM) AM_BASE(&f3_shared_ram) AM_RANGE(0x800000, 0x80ffff) AM_WRITE(TC0480SCP_long_w) /* tilemaps */ AM_RANGE(0x830000, 0x83002f) AM_WRITE(TC0480SCP_ctrl_long_w) AM_RANGE(0x900000, 0x90ffff) AM_WRITE(TC0100SCN_long_w) /* piv tilemaps */ AM_RANGE(0x920000, 0x92000f) AM_WRITE(TC0100SCN_ctrl_long_w) AM_RANGE(0xa00000, 0xa0ffff) AM_WRITE(color_ram_w) AM_BASE(&paletteram32) AM_RANGE(0xb00000, 0xb003ff) AM_WRITE(SMH_RAM) // single bytes, blending ?? AM_RANGE(0xd00000, 0xd00003) AM_WRITE(rotate_control_w) /* perhaps port based rotate control? */ /* f00000 is seat control? */ ADDRESS_MAP_END /*********************************************************** INPUT PORTS (dips in eprom) ***********************************************************/ static INPUT_PORTS_START( groundfx ) PORT_START("BUTTONS") PORT_BIT( 0x00000001, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(frame_counter_r, NULL) PORT_BIT( 0x00000002, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000004, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000008, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000010, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000020, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000040, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000080, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(eeprom_bit_r, NULL) PORT_BIT( 0x00000100, IP_ACTIVE_LOW, IPT_BUTTON3 ) /* shift hi */ PORT_BIT( 0x00000200, IP_ACTIVE_LOW, IPT_BUTTON1 ) /* brake */ PORT_BIT( 0x00000400, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000800, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00001000, IP_ACTIVE_LOW, IPT_BUTTON2 ) /* shift low */ PORT_BIT( 0x00002000, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00004000, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00008000, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0xffff0000, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("SYSTEM") PORT_SERVICE_NO_TOGGLE( 0x00000001, IP_ACTIVE_LOW ) PORT_BIT( 0x00000002, IP_ACTIVE_LOW, IPT_SERVICE1 ) PORT_BIT( 0x00000004, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x00000008, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_BIT( 0x00000010, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000020, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000040, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x00000080, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0xffff0000, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(coin_word_r, NULL) PORT_START("AN0") /* IN 2, steering wheel */ PORT_BIT( 0xff, 0x7f, IPT_AD_STICK_X ) PORT_SENSITIVITY(25) PORT_KEYDELTA(15) PORT_REVERSE PORT_PLAYER(1) PORT_START("AN1") /* IN 3, accel */ PORT_BIT( 0xff, 0xff, IPT_AD_STICK_Y ) PORT_SENSITIVITY(20) PORT_KEYDELTA(10) PORT_PLAYER(1) PORT_START("AN2") /* IN 4, sound volume */ PORT_BIT( 0xff, 0x00, IPT_AD_STICK_X ) PORT_SENSITIVITY(20) PORT_KEYDELTA(10) PORT_REVERSE PORT_PLAYER(2) PORT_START("AN3") /* IN 5, unknown */ PORT_BIT( 0xff, 0x00, IPT_AD_STICK_Y ) PORT_SENSITIVITY(20) PORT_KEYDELTA(10) PORT_PLAYER(2) INPUT_PORTS_END /********************************************************** GFX DECODING **********************************************************/ static const gfx_layout tile16x16_layout = { 16,16, /* 16*16 sprites */ RGN_FRAC(1,2), 5, /* 5 bits per pixel */ { RGN_FRAC(1,2), 0, 8, 16, 24 }, { 32, 33, 34, 35, 36, 37, 38, 39, 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64, 8*64, 9*64, 10*64, 11*64, 12*64, 13*64, 14*64, 15*64 }, 64*16 /* every sprite takes 128 consecutive bytes */ }; static const gfx_layout charlayout = { 16,16, /* 16*16 characters */ RGN_FRAC(1,1), 4, /* 4 bits per pixel */ { 0, 1, 2, 3 }, { 1*4, 0*4, 5*4, 4*4, 3*4, 2*4, 7*4, 6*4, 9*4, 8*4, 13*4, 12*4, 11*4, 10*4, 15*4, 14*4 }, { 0*64, 1*64, 2*64, 3*64, 4*64, 5*64, 6*64, 7*64, 8*64, 9*64, 10*64, 11*64, 12*64, 13*64, 14*64, 15*64 }, 128*8 /* every sprite takes 128 consecutive bytes */ }; static const gfx_layout pivlayout = { 8,8, /* 8*8 characters */ RGN_FRAC(1,2), 6, /* 4 bits per pixel */ { RGN_FRAC(1,2), RGN_FRAC(1,2)+1, 0, 1, 2, 3 }, { 2*4, 3*4, 0*4, 1*4, 6*4, 7*4, 4*4, 5*4 }, { 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 }, 32*8 /* every sprite takes 32 consecutive bytes */ }; static GFXDECODE_START( groundfx ) GFXDECODE_ENTRY( "gfx2", 0x0, tile16x16_layout, 4096, 512 ) GFXDECODE_ENTRY( "gfx1", 0x0, charlayout, 0, 512 ) GFXDECODE_ENTRY( "gfx3", 0x0, pivlayout, 0, 512 ) GFXDECODE_END /*********************************************************** MACHINE DRIVERS ***********************************************************/ static MACHINE_RESET( groundfx ) { taito_f3_soundsystem_reset(machine); f3_68681_reset(); } static INTERRUPT_GEN( groundfx_interrupt ) { frame_counter^=1; cpunum_set_input_line(machine, 0, 4, HOLD_LINE); } static MACHINE_DRIVER_START( groundfx ) /* basic machine hardware */ MDRV_CPU_ADD("main", M68EC020, 16000000) /* 16 MHz */ MDRV_CPU_PROGRAM_MAP(groundfx_readmem,groundfx_writemem) MDRV_CPU_VBLANK_INT("main", groundfx_interrupt) TAITO_F3_SOUND_SYSTEM_CPU(16000000) MDRV_MACHINE_RESET(groundfx) MDRV_NVRAM_HANDLER(groundfx) /* video hardware */ MDRV_SCREEN_ADD("main", RASTER) MDRV_SCREEN_REFRESH_RATE(60) MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0)) MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16) MDRV_SCREEN_SIZE(40*8, 32*8) MDRV_SCREEN_VISIBLE_AREA(0, 40*8-1, 3*8, 32*8-1) MDRV_GFXDECODE(groundfx) MDRV_PALETTE_LENGTH(16384) MDRV_VIDEO_START(groundfx) MDRV_VIDEO_UPDATE(groundfx) /* sound hardware */ TAITO_F3_SOUND_SYSTEM_ES5505(30476100/2) MACHINE_DRIVER_END /*************************************************************************** DRIVERS ***************************************************************************/ ROM_START( groundfx ) ROM_REGION( 0x200000, "main", 0 ) /* 2048K for 68020 code (CPU A) */ ROM_LOAD32_BYTE( "d51-24.79", 0x00000, 0x80000, CRC(5caaa031) SHA1(03e727e26df701e3f5e16c5f933d5b29a528945a) ) ROM_LOAD32_BYTE( "d51-23.61", 0x00001, 0x80000, CRC(462e3c9b) SHA1(7f116ee755748497b911868a948d3e3b5134e475) ) ROM_LOAD32_BYTE( "d51-22.77", 0x00002, 0x80000, CRC(b6b04d88) SHA1(58685ee8fd788dcbfe318f1e3c06d93e2128034c) ) ROM_LOAD32_BYTE( "d51-21.59", 0x00003, 0x80000, CRC(21ecde2b) SHA1(c6d3738f34c8e24346e7784b14aeff300ae2d225) ) ROM_REGION( 0x180000, "audio", 0 ) ROM_LOAD16_BYTE( "d51-29.54", 0x100000, 0x40000, CRC(4b64f41d) SHA1(040427668d13f7320d23805098d6d0e1aa8d121e) ) ROM_LOAD16_BYTE( "d51-30.56", 0x100001, 0x40000, CRC(45f339fe) SHA1(cc7adfb2b86070f5bb426542e3b7ed2a50b3c39e) ) ROM_REGION( 0x400000, "gfx1", ROMREGION_DISPOSE ) ROM_LOAD16_BYTE( "d51-08.35", 0x000000, 0x200000, CRC(835b7a0f) SHA1(0131fceabd73b0045b5d4ae0bb2f03efdd407962) ) /* SCR 16x16 tiles */ ROM_LOAD16_BYTE( "d51-09.34", 0x000001, 0x200000, CRC(6dabd83d) SHA1(3dbd7ea36b9900faa6420af1f1600efe295db74c) ) ROM_REGION( 0x1000000, "gfx2", ROMREGION_DISPOSE ) ROM_LOAD32_BYTE( "d51-03.47", 0x800000, 0x200000, CRC(629a5c99) SHA1(cfc1c0b07ecefd6eddb83edcbcf710e8b8de19e4) ) /* OBJ 16x16 tiles */ ROM_LOAD32_BYTE( "d51-04.48", 0x000000, 0x200000, CRC(f49b14b7) SHA1(31129771159c1295a074c8311344ece525302289) ) ROM_LOAD32_BYTE( "d51-05.49", 0x000001, 0x200000, CRC(3a2e2cbf) SHA1(ed2c1ca9211b1d70b4767a54e08263a3e4867199) ) ROM_LOAD32_BYTE( "d51-06.50", 0x000002, 0x200000, CRC(d33ce2a0) SHA1(92c4504344672ea798cd6dd34f4b46848bf9f82b) ) ROM_LOAD32_BYTE( "d51-07.51", 0x000003, 0x200000, CRC(24b2f97d) SHA1(6980e67b435d189ce897c0301e0411763410ab47) ) ROM_REGION( 0x400000, "gfx3", ROMREGION_DISPOSE ) ROM_LOAD16_BYTE( "d51-10.95", 0x000000, 0x100000, CRC(d5910604) SHA1(8efe13884cfdef208394ddfe19f43eb1b9f78ff3) ) /* PIV 8x8 tiles, 6bpp */ ROM_LOAD16_BYTE( "d51-11.96", 0x000001, 0x100000, CRC(fee5f5c6) SHA1(1be88747f9c71c348dd61a8f0040007df3a3e6a6) ) ROM_LOAD ( "d51-12.97", 0x300000, 0x100000, CRC(d630287b) SHA1(2fa09e1821b7280d193ca9a2a270759c3c3189d1) ) ROM_FILL ( 0x200000, 0x100000, 0 ) ROM_REGION16_LE( 0x80000, "user1", 0 ) ROM_LOAD16_WORD( "d51-13.7", 0x00000, 0x80000, CRC(36921b8b) SHA1(2130120f78a3b984618a53054fc937cf727177b9) ) /* STY, spritemap */ ROM_REGION16_BE( 0x1000000, "ensoniq.0", ROMREGION_ERASE00 ) ROM_LOAD16_BYTE( "d51-01.73", 0x000000, 0x200000, CRC(92f09155) SHA1(8015e1997818bb480174394eb43840bf26679bcf) ) /* Ensoniq samples */ ROM_LOAD16_BYTE( "d51-02.74", 0xc00000, 0x200000, CRC(20a9428f) SHA1(c9033d02a49c72f704808f5f899101617d5814e5) ) ROM_END static READ32_HANDLER( irq_speedup_r_groundfx ) { int ptr; if ((activecpu_get_sp()&2)==0) ptr=groundfx_ram[(activecpu_get_sp()&0x1ffff)/4]; else ptr=(((groundfx_ram[(activecpu_get_sp()&0x1ffff)/4])&0x1ffff)<<16) | (groundfx_ram[((activecpu_get_sp()&0x1ffff)/4)+1]>>16); if (activecpu_get_pc()==0x1ece && ptr==0x1b9a) cpu_spinuntil_int(); return groundfx_ram[0xb574/4]; } static DRIVER_INIT( groundfx ) { UINT32 offset,i; UINT8 *gfx = memory_region(machine, "gfx3"); int size=memory_region_length(machine, "gfx3"); int data; /* Speedup handlers */ memory_install_read32_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0x20b574, 0x20b577, 0, 0, irq_speedup_r_groundfx); /* make piv tile GFX format suitable for gfxdecode */ offset = size/2; for (i = size/2+size/4; i>0) & 3; d2 = (data>>2) & 3; d3 = (data>>4) & 3; d4 = (data>>6) & 3; gfx[offset] = (d1<<2) | (d2<<6); offset++; gfx[offset] = (d3<<2) | (d4<<6); offset++; } } GAME( 1992, groundfx, 0, groundfx, groundfx, groundfx, ROT0, "Taito Corporation", "Ground Effects / Super Ground Effects (Japan)", 0 )