/* Two Minute Drill - Taito 1993 ----------------------------- Half Video, Half Mechanical? (video hw + motion/acceleration sensor ?) preliminary driver by David Haywood Tomasz Slanina Angelo Salese TODO: - understand the ball hit sensor - simulate the sensors (there are still some shutter errors/defender errors that pops up) - Hook-up timers for shutter/defender sensors (check service mode) - Dip-Switches Brief hardware overview: ------------------------ Main processor - 68000 16Mhz Sound - Yamaha YM2610B Taito custom ICs - TC0400YSC (m68k -> ym2610 communication) - TC0260DAR (palette chip) - TC0630FDP (Taito F3 video chip) - TC0510NIO (known input chip) DAC -26.6860Mhz -32.0000Mhz */ #include "emu.h" #include "cpu/m68000/m68000.h" #include "sound/2610intf.h" #include "includes/taito_f3.h" class _2mindril_state : public taito_f3_state { public: _2mindril_state(const machine_config &mconfig, device_type type, const char *tag) : taito_f3_state(mconfig, type, tag), m_iodata(*this, "iodata") { } /* memory pointers */ required_shared_ptr m_iodata; /* input-related */ UINT16 m_defender_sensor; UINT16 m_shutter_sensor; UINT16 irq_reg; /* devices */ cpu_device *m_maincpu; DECLARE_READ16_MEMBER(drill_io_r); DECLARE_WRITE16_MEMBER(drill_io_w); DECLARE_WRITE16_MEMBER(sensors_w); DECLARE_READ16_MEMBER(drill_irq_r); DECLARE_WRITE16_MEMBER(drill_irq_w); DECLARE_DRIVER_INIT(drill); DECLARE_MACHINE_START(drill); DECLARE_MACHINE_RESET(drill); INTERRUPT_GEN_MEMBER(drill_vblank_irq); //INTERRUPT_GEN_MEMBER(drill_device_irq); TIMER_CALLBACK_MEMBER(shutter_req); TIMER_CALLBACK_MEMBER(defender_req); void tile_decode(); }; READ16_MEMBER(_2mindril_state::drill_io_r) { // if (offset * 2 == 0x4) /*popmessage("PC=%08x %04x %04x %04x %04x %04x %04x %04x %04x", space.device().safe_pc(), m_iodata[0/2], m_iodata[2/2], m_iodata[4/2], m_iodata[6/2], m_iodata[8/2], m_iodata[0xa/2], m_iodata[0xc/2], m_iodata[0xe/2]);*/ switch(offset) { case 0x0/2: return ioport("DSW")->read(); case 0x2/2: { int arm_pwr = ioport("IN0")->read();//throw //popmessage("PC=%08x %02x",space.device().safe_pc(),arm_pwr); if(arm_pwr > 0xe0) return ~0x1800; if(arm_pwr > 0xc0) return ~0x1400; if(arm_pwr > 0x80) return ~0x1200; if(arm_pwr > 0x40) return ~0x1000; else return ~0x0000; } case 0x4/2: return (m_defender_sensor) | (m_shutter_sensor); case 0xe/2: return ioport("IN2")->read();//coins // default: printf("PC=%08x [%04x] -> %04x R\n", space.device().safe_pc(), offset * 2, m_iodata[offset]); } return 0xffff; } WRITE16_MEMBER(_2mindril_state::drill_io_w) { COMBINE_DATA(&m_iodata[offset]); switch(offset) { case 0x8/2: coin_counter_w(machine(), 0, m_iodata[offset] & 0x0400); coin_counter_w(machine(), 1, m_iodata[offset] & 0x0800); coin_lockout_w(machine(), 0, ~m_iodata[offset] & 0x0100); coin_lockout_w(machine(), 1, ~m_iodata[offset] & 0x0200); break; } // if(data != 0 && offset != 8) // printf("PC=%08x [%04x] <- %04x W\n", space.device().safe_pc(), offset * 2, data); } /* PORT_DIPNAME( 0x0100, 0x0000, DEF_STR( Unknown ) )//up sensor <- shutter PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0100, DEF_STR( On ) ) PORT_DIPNAME( 0x0200, 0x0000, DEF_STR( Unknown ) )//down sensor PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0200, DEF_STR( On ) ) PORT_DIPNAME( 0x0400, 0x0000, DEF_STR( Unknown ) )//left sensor <-defender PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0400, DEF_STR( On ) ) PORT_DIPNAME( 0x0800, 0x0000, DEF_STR( Unknown ) )//right sensor PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0800, DEF_STR( On ) ) */ #ifdef UNUSED_FUNCTION TIMER_CALLBACK_MEMBER(_2mindril_state::shutter_req) { m_shutter_sensor = param; } TIMER_CALLBACK_MEMBER(_2mindril_state::defender_req) { m_defender_sensor = param; } #endif WRITE16_MEMBER(_2mindril_state::sensors_w) { /*---- xxxx ---- ---- select "lamps" (guess)*/ /*---- ---- ---- -x-- lamp*/ if (data & 1) { //machine().scheduler().timer_set(attotime::from_seconds(2), FUNC(shutter_req ), 0x100); m_shutter_sensor = 0x100; } else if (data & 2) { //machine().scheduler().timer_set( attotime::from_seconds(2), FUNC(shutter_req ), 0x200); m_shutter_sensor = 0x200; } if (data & 0x1000 || data & 0x4000) { //machine().scheduler().timer_set( attotime::from_seconds(2), FUNC(defender_req ), 0x800); m_defender_sensor = 0x800; } else if (data & 0x2000 || data & 0x8000) { //machine().scheduler().timer_set( attotime::from_seconds(2), FUNC(defender_req ), 0x400); m_defender_sensor = 0x400; } } READ16_MEMBER(_2mindril_state::drill_irq_r) { return irq_reg; } WRITE16_MEMBER(_2mindril_state::drill_irq_w) { /* (note: could rather be irq mask) ---- ---- ---x ---- irq lv 5 ack, 0->1 latch ---- ---- ---- x--- irq lv 4 ack, 0->1 latch ---- ---- -??- -??? connected to the other levels? */ if(((irq_reg & 8) == 0) && data & 8) machine().device("maincpu")->execute().set_input_line(4, CLEAR_LINE); if(((irq_reg & 0x10) == 0) && data & 0x10) machine().device("maincpu")->execute().set_input_line(5, CLEAR_LINE); if(data & 0xffe7) printf("%04x\n",data); COMBINE_DATA(&irq_reg); } static ADDRESS_MAP_START( drill_map, AS_PROGRAM, 16, _2mindril_state ) AM_RANGE(0x000000, 0x07ffff) AM_ROM AM_RANGE(0x200000, 0x20ffff) AM_RAM AM_RANGE(0x300000, 0x3000ff) AM_RAM AM_RANGE(0x400000, 0x40ffff) AM_READWRITE(f3_spriteram_r,f3_spriteram_w) AM_RANGE(0x410000, 0x41bfff) AM_READWRITE(f3_pf_data_r,f3_pf_data_w) AM_RANGE(0x41c000, 0x41dfff) AM_READWRITE(f3_videoram_r,f3_videoram_w) AM_RANGE(0x41e000, 0x41ffff) AM_READWRITE(f3_vram_r,f3_vram_w) AM_RANGE(0x420000, 0x42ffff) AM_READWRITE(f3_lineram_r,f3_lineram_w) AM_RANGE(0x430000, 0x43ffff) AM_READWRITE(f3_pivot_r,f3_pivot_w) AM_RANGE(0x460000, 0x46000f) AM_WRITE(f3_control_0_w) AM_RANGE(0x460010, 0x46001f) AM_WRITE(f3_control_1_w) AM_RANGE(0x500000, 0x501fff) AM_RAM_WRITE(paletteram_RRRRGGGGBBBBRGBx_word_w) AM_SHARE("paletteram") AM_RANGE(0x502022, 0x502023) AM_WRITENOP //countinously switches between 0 and 2 AM_RANGE(0x600000, 0x600007) AM_DEVREADWRITE8_LEGACY("ymsnd", ym2610_r, ym2610_w, 0x00ff) AM_RANGE(0x60000c, 0x60000d) AM_READWRITE(drill_irq_r,drill_irq_w) AM_RANGE(0x60000e, 0x60000f) AM_RAM // unknown purpose, zeroed at start-up and nothing else AM_RANGE(0x700000, 0x70000f) AM_READWRITE(drill_io_r,drill_io_w) AM_SHARE("iodata") // i/o AM_RANGE(0x800000, 0x800001) AM_WRITE(sensors_w) ADDRESS_MAP_END static INPUT_PORTS_START( drill ) PORT_START("DSW")//Dip-Switches PORT_DIPNAME( 0x0001, 0x0001, "DSW" ) PORT_DIPSETTING( 0x0001, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0002, 0x0002, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0002, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0004, 0x0004, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0004, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0008, 0x0008, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0008, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0010, 0x0010, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0010, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0020, 0x0020, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0020, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0040, 0x0040, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0040, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0080, 0x0080, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0080, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0100, 0x0100, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0100, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0200, 0x0200, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0200, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0400, 0x0400, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0400, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x0800, 0x0800, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0800, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x1000, 0x1000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x1000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x2000, 0x2000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x2000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x4000, 0x4000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x4000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_DIPNAME( 0x8000, 0x8000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x8000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0000, DEF_STR( On ) ) PORT_START("IN0")//sensors PORT_BIT( 0xff, 0x00, IPT_DIAL ) PORT_SENSITIVITY(25) PORT_KEYDELTA(20) PORT_START("IN1") PORT_DIPNAME( 0x0001, 0x0000, "IN1" ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0001, DEF_STR( On ) ) PORT_DIPNAME( 0x0002, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0002, DEF_STR( On ) ) PORT_DIPNAME( 0x0004, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0004, DEF_STR( On ) ) PORT_DIPNAME( 0x0008, 0x0008, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0008, DEF_STR( On ) ) PORT_DIPNAME( 0x0010, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0010, DEF_STR( On ) ) PORT_DIPNAME( 0x0020, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0020, DEF_STR( On ) ) PORT_DIPNAME( 0x0040, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0040, DEF_STR( On ) ) PORT_DIPNAME( 0x0080, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0080, DEF_STR( On ) ) PORT_DIPNAME( 0x0100, 0x0000, DEF_STR( Unknown ) )//up sensor PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0100, DEF_STR( On ) ) PORT_DIPNAME( 0x0200, 0x0000, DEF_STR( Unknown ) )//down sensor PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0200, DEF_STR( On ) ) PORT_DIPNAME( 0x0400, 0x0000, DEF_STR( Unknown ) )//left sensor PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0400, DEF_STR( On ) ) PORT_DIPNAME( 0x0800, 0x0000, DEF_STR( Unknown ) )//right sensor PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x0800, DEF_STR( On ) ) PORT_DIPNAME( 0x1000, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x1000, DEF_STR( On ) ) PORT_DIPNAME( 0x2000, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x2000, DEF_STR( On ) ) PORT_DIPNAME( 0x4000, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x4000, DEF_STR( On ) ) PORT_DIPNAME( 0x8000, 0x0000, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x0000, DEF_STR( Off ) ) PORT_DIPSETTING( 0x8000, DEF_STR( On ) ) PORT_START("IN2")//coins PORT_BIT( 0x00ff, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_SERVICE1 ) PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("Select SW-1") PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("Select SW-2") PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_NAME("Select SW-3") PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_NAME("Select SW-4") INPUT_PORTS_END static const gfx_layout charlayout = { 8,8, 256, 4, { 0,1,2,3 }, { 20, 16, 28, 24, 4, 0, 12, 8 }, { 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 }, 32*8 }; static const gfx_layout pivotlayout = { 8,8, 2048, 4, { 0,1,2,3 }, { 20, 16, 28, 24, 4, 0, 12, 8 }, { 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 }, 32*8 }; static const gfx_layout spriteram_layout = { 16,16, RGN_FRAC(1,2), 6, /* Palettes have 4 bpp indexes despite up to 6 bpp data */ { RGN_FRAC(1,2)+0, RGN_FRAC(1,2)+1, 0, 1, 2, 3 }, { 4, 0, 12, 8, 16+4, 16+0, 16+12, 16+8, 32+4, 32+0, 32+12, 32+8, 48+4, 48+0, 48+12, 48+8 }, { 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 tile_layout = { 16,16, RGN_FRAC(1,2), 6, /* Palettes have 4 bpp indexes despite up to 6 bpp data */ { RGN_FRAC(1,2)+2, RGN_FRAC(1,2)+3, 0, 1, 2, 3 }, { 4, 0, 16+4, 16+0, 8+4, 8+0, 24+4, 24+0, 32+4, 32+0, 48+4, 48+0, 40+4, 40+0, 56+4, 56+0, }, { 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 GFXDECODE_START( 2mindril ) GFXDECODE_ENTRY( NULL, 0x000000, charlayout, 0x0000, 0x0400>>4 ) /* Dynamically modified */ GFXDECODE_ENTRY( "gfx2", 0x000000, tile_layout, 0x0000, 0x2000>>4 ) /* Tiles area */ GFXDECODE_ENTRY( "gfx1", 0x000000, spriteram_layout, 0x1000, 0x1000>>4 ) /* Sprites area */ GFXDECODE_ENTRY( NULL, 0x000000, pivotlayout, 0x0000, 0x400>>4 ) /* Dynamically modified */ GFXDECODE_END INTERRUPT_GEN_MEMBER(_2mindril_state::drill_vblank_irq) { device.execute().set_input_line(4, ASSERT_LINE); } #if 0 INTERRUPT_GEN_MEMBER(_2mindril_state::drill_device_irq) { device.execute().set_input_line(5, ASSERT_LINE); } #endif /* WRONG,it does something with 60000c & 700002,likely to be called when the player throws the ball.*/ static void irqhandler(device_t *device, int irq) { // _2mindril_state *state = machine.driver_data<_2mindril_state>(); // state->m_maincpu->set_input_line(5, irq ? ASSERT_LINE : CLEAR_LINE); } static const ym2610_interface ym2610_config = { irqhandler }; MACHINE_START_MEMBER(_2mindril_state,drill) { m_maincpu = machine().device("maincpu"); save_item(NAME(m_defender_sensor)); save_item(NAME(m_shutter_sensor)); } MACHINE_RESET_MEMBER(_2mindril_state,drill) { m_defender_sensor = 0; m_shutter_sensor = 0; irq_reg = 0; } static MACHINE_CONFIG_START( drill, _2mindril_state ) MCFG_CPU_ADD("maincpu", M68000, 16000000 ) MCFG_CPU_PROGRAM_MAP(drill_map) MCFG_CPU_VBLANK_INT_DRIVER("screen", _2mindril_state, drill_vblank_irq) //MCFG_CPU_PERIODIC_INT_DRIVER(_2mindril_state, drill_device_irq, 60) MCFG_GFXDECODE(2mindril) MCFG_MACHINE_START_OVERRIDE(_2mindril_state,drill) MCFG_MACHINE_RESET_OVERRIDE(_2mindril_state,drill) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* inaccurate, same as Taito F3? (needs screen raw params anyway) */ MCFG_SCREEN_SIZE(40*8+48*2, 32*8) MCFG_SCREEN_VISIBLE_AREA(46, 40*8-1 + 46, 24, 24+224-1) MCFG_SCREEN_UPDATE_DRIVER(_2mindril_state, screen_update_f3) MCFG_SCREEN_VBLANK_DRIVER(_2mindril_state, screen_eof_f3) MCFG_PALETTE_LENGTH(0x2000) MCFG_VIDEO_START_OVERRIDE(_2mindril_state,f3) MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker") MCFG_SOUND_ADD("ymsnd", YM2610B, 16000000/2) MCFG_SOUND_CONFIG(ym2610_config) MCFG_SOUND_ROUTE(0, "lspeaker", 0.25) MCFG_SOUND_ROUTE(0, "rspeaker", 0.25) MCFG_SOUND_ROUTE(1, "lspeaker", 1.0) MCFG_SOUND_ROUTE(2, "rspeaker", 1.0) MACHINE_CONFIG_END ROM_START( 2mindril ) ROM_REGION( 0x80000, "maincpu", 0 ) /* 68000 Code */ ROM_LOAD16_BYTE( "d58-38.ic11", 0x00000, 0x40000, CRC(c58e8e4f) SHA1(648db679c3bfb5de1cd6c1b1217773a2fe56f11b) ) ROM_LOAD16_BYTE( "d58-37.ic9", 0x00001, 0x40000, CRC(19e5cc3c) SHA1(04ac0eef893c579fe90d91d7fd55c5741a2b7460) ) ROM_REGION( 0x200000, "ymsnd", 0 ) /* Samples */ ROM_LOAD( "d58-11.ic31", 0x000000, 0x200000, CRC(dc26d58d) SHA1(cffb18667da18f5367b02af85a2f7674dd61ae97) ) ROM_REGION( 0x800000, "gfx1", ROMREGION_ERASE00 ) ROM_REGION( 0x800000, "gfx2", 0 ) ROM_LOAD16_BYTE( "d58-09.ic28", 0x000001, 0x200000, CRC(d8f6a86a) SHA1(d6b2ec309e21064574ee63e025ae4716b1982a98) ) ROM_LOAD16_BYTE( "d58-08.ic27", 0x000000, 0x200000, CRC(9f5a3f52) SHA1(7b696bd823819965b974c853cebc1660750db61e) ) ROM_LOAD( "d58-10.ic29", 0x400000, 0x200000, CRC(74c87e08) SHA1(f39b3a64f8338ccf5ca6eb76cee92a10fe0aad8f) ) ROM_RELOAD( 0x600000, 0x200000 ) ROM_END void _2mindril_state::tile_decode() { UINT8 lsb,msb; UINT32 offset,i; UINT8 *gfx = machine().root_device().memregion("gfx2")->base(); int size=machine().root_device().memregion("gfx2")->bytes(); int data; /* Setup ROM formats: Some games will only use 4 or 5 bpp sprites, and some only use 4 bpp tiles, I don't believe this is software or prom controlled but simply the unused data lines are tied low on the game board if unused. This is backed up by the fact the palette indices are always related to 4 bpp data, even in 6 bpp games. Most (all?) games with 5bpp tiles have the sixth bit set. Also, in Arabian Magic sprites 1200-120f contain 6bpp data which is probably bogus. VIDEO_START( f3 ) clears the fifth and sixth bit of the decoded graphics according to the bit depth specified in f3_config_table. */ offset = size/2; for (i = size/2+size/4; i>0) | ((lsb&0x02)<<4) | ((lsb&0x01)<<1); gfx[offset+2]=((msb&0x08)<<1) | ((msb&0x04)>>2) | ((lsb&0x08)<<2) | ((lsb&0x04)>>1); gfx[offset+1]=((msb&0x20)>>1) | ((msb&0x10)>>4) | ((lsb&0x20)<<0) | ((lsb&0x10)>>3); gfx[offset+3]=((msb&0x80)>>3) | ((msb&0x40)>>6) | ((lsb&0x80)>>2) | ((lsb&0x40)>>5); offset+=4; } gfx = machine().root_device().memregion("gfx1")->base(); size=machine().root_device().memregion("gfx1")->bytes(); 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++; } } DRIVER_INIT_MEMBER(_2mindril_state,drill) { m_f3_game=TMDRILL; tile_decode(); } GAME( 1993, 2mindril, 0, drill, drill, _2mindril_state, drill, ROT0, "Taito", "Two Minute Drill", GAME_NOT_WORKING | GAME_IMPERFECT_GRAPHICS | GAME_SUPPORTS_SAVE | GAME_MECHANICAL)