/*************************************************************************** IQ Block (c) 1992 IGS Driver by Nicola Salmoria and Ernesto Corvi TODO: - Who generates IRQ and NMI? How many should there be per frame? - Sound chip is a UM3567. Is this compatible to something already in MAME? yes, YM2413 - Coin 2 doesn't work? DIP switch setting? - Protection: I can see it reading things like the R register here and there, so it might be cycle-dependant or something. 'Crash 1' checks I was able to see: PC = $52FA PC = $507F 'Crash 2' checks I was able to see: PC = $54E6 Stephh's notes : - Coin 2 as well as buttons 2 to 4 for each player are only read in "test mode". Same issue for Dip Siwtches 0-7 and 1-2 to 1-6. Some other games on the same hardware might use them. - Dip Switch 0 is stored at 0xf0ac and Dip Switch 1 is stored at 0xf0ad. However they are both read back at the same time with "ld hl,($F0AC)" instructions. - Dip Switches 0-0 and 0-1 are read via code at 0x9470. This routine is called when you made a "line" after the routine that checks the score for awarding extra help and/or changing background. Data is coming from 4 possible tables (depending on them) which seem to be 0x84 bytes wide. Table 0 offset is 0xeaf7. IMO, this has something to do with difficulty but there is no confirmation about that ! - Dip Switch 1-0 is read only once after the P.O.S.T. via code at 0xa200. It changes (or not) the contents of 0xf0db.w which can get these 2 possible values at start : 0x47a3 (when OFF) or 0x428e (when ON) which seem to be tables. If you set a WP to 0xf0db, you'll notice that it's called more often in the "demo mode" when the Dip Switch is ON, so, as it implies writes to outport 0x50b0, I think it has something to do with "Demo Sounds". I can't tell however if setting the Dip Switch to OFF means "Demo Sounds" OFF or ON ! Grndtour: - Title should flash 3X slowly. In MAME it flashes too fast, or strangely?? ***************************************************************************/ #include "driver.h" #include "deprecat.h" #include "machine/8255ppi.h" #include "iqblock.h" #include "sound/2413intf.h" static UINT8 *rambase; static WRITE8_HANDLER( iqblock_prot_w ) { rambase[0xe26] = data; rambase[0xe27] = data; rambase[0xe1c] = data; } static WRITE8_HANDLER( grndtour_prot_w ) { rambase[0xe39] = data; rambase[0xe3a] = data; rambase[0xe2f] = data; } static INTERRUPT_GEN( iqblock_interrupt ) { if (cpu_getiloops() & 1) cpunum_set_input_line(machine, 0, INPUT_LINE_NMI, PULSE_LINE); /* ???? */ else cpunum_set_input_line(machine, 0, 0, ASSERT_LINE); /* ???? */ } static WRITE8_HANDLER( iqblock_irqack_w ) { cpunum_set_input_line(machine, 0, 0, CLEAR_LINE); } static READ8_HANDLER( extrarom_r ) { return memory_region(machine, "user1")[offset]; } static WRITE8_HANDLER( port_C_w ) { /* bit 4 unknown; it is pulsed at the end of every NMI */ /* bit 5 seems to be 0 during screen redraw */ iqblock_videoenable = data & 0x20; /* bit 6 is coin counter */ coin_counter_w(0,data & 0x40); /* bit 7 could be a second coin counter, but coin 2 doesn't seem to work... */ } static const ppi8255_interface ppi8255_intf = { input_port_0_r, /* Port A read */ input_port_1_r, /* Port B read */ input_port_2_r, /* Port C read */ NULL, /* Port A write */ NULL, /* Port B write */ port_C_w /* Port C write */ }; static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 ) AM_RANGE(0x0000, 0xefff) AM_ROM AM_RANGE(0xf000, 0xffff) AM_RAM AM_BASE(&rambase) ADDRESS_MAP_END static ADDRESS_MAP_START( main_portmap, ADDRESS_SPACE_IO, 8 ) AM_RANGE(0x2000, 0x23ff) AM_WRITE(paletteram_xBBBBBGGGGGRRRRR_split1_w) AM_RANGE(0x2800, 0x2bff) AM_WRITE(paletteram_xBBBBBGGGGGRRRRR_split2_w) AM_RANGE(0x6000, 0x603f) AM_WRITE(iqblock_fgscroll_w) AM_RANGE(0x6800, 0x69ff) AM_WRITE(iqblock_fgvideoram_w) /* initialized up to 6fff... bug or larger tilemap? */ AM_RANGE(0x7000, 0x7fff) AM_WRITE(iqblock_bgvideoram_w) AM_RANGE(0x5080, 0x5083) AM_DEVWRITE(PPI8255, "ppi8255", ppi8255_w) AM_RANGE(0x5080, 0x5083) AM_DEVREAD(PPI8255, "ppi8255", ppi8255_r) AM_RANGE(0x5090, 0x5090) AM_READ(input_port_3_r) AM_RANGE(0x50a0, 0x50a0) AM_READ(input_port_4_r) AM_RANGE(0x50b0, 0x50b0) AM_WRITE(YM2413_register_port_0_w) // UM3567_register_port_0_w AM_RANGE(0x50b1, 0x50b1) AM_WRITE(YM2413_data_port_0_w) // UM3567_data_port_0_w AM_RANGE(0x50c0, 0x50c0) AM_WRITE(iqblock_irqack_w) AM_RANGE(0x7000, 0x7fff) AM_READ(iqblock_bgvideoram_r) AM_RANGE(0x8000, 0xffff) AM_READ(extrarom_r) ADDRESS_MAP_END static INPUT_PORTS_START( iqblock ) PORT_START("P1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 ) // "test mode" only PORT_START("P2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN2 ) // "test mode" only PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL // "test mode" only PORT_START("EXTRA") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON3 ) // "test mode" only PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON4 ) // "test mode" only PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_COCKTAIL // "test mode" only PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_COCKTAIL // "test mode" only PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("SW0") PORT_DIPNAME( 0x03, 0x03, "Unknown SW 0-0&1" ) // Difficulty ? Read notes above PORT_DIPSETTING( 0x03, "0" ) PORT_DIPSETTING( 0x02, "1" ) PORT_DIPSETTING( 0x01, "2" ) PORT_DIPSETTING( 0x00, "3" ) PORT_DIPNAME( 0x0c, 0x0c, "Helps" ) PORT_DIPSETTING( 0x0c, "1" ) PORT_DIPSETTING( 0x08, "2" ) PORT_DIPSETTING( 0x04, "3" ) PORT_DIPSETTING( 0x00, "4" ) PORT_DIPNAME( 0x70, 0x70, DEF_STR( Coin_A ) ) PORT_DIPSETTING( 0x00, DEF_STR( 4C_1C ) ) PORT_DIPSETTING( 0x10, DEF_STR( 3C_1C ) ) PORT_DIPSETTING( 0x20, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x70, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x60, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x50, DEF_STR( 1C_3C ) ) PORT_DIPSETTING( 0x40, DEF_STR( 1C_4C ) ) PORT_DIPSETTING( 0x30, DEF_STR( 1C_6C ) ) PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x80, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_START("SW1") PORT_DIPNAME( 0x01, 0x00, "Demo Sounds?" ) // To be confirmed ! Read notes above PORT_DIPSETTING( 0x01, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x02, 0x02, DEF_STR( Free_Play ) ) PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x04, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x20, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_SERVICE( 0x80, IP_ACTIVE_LOW ) INPUT_PORTS_END static const gfx_layout tilelayout1 = { 8,8, RGN_FRAC(1,3), 6, { 8, 0, RGN_FRAC(1,3)+8, RGN_FRAC(1,3)+0, RGN_FRAC(2,3)+8, RGN_FRAC(2,3)+0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 }, 8*16 }; static const gfx_layout tilelayout2 = { 8,32, RGN_FRAC(1,2), 4, { 8, 0, RGN_FRAC(1,2)+8, RGN_FRAC(1,2)+0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16, 8*16, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16, 16*16, 17*16, 18*16, 19*16, 20*16, 21*16, 22*16, 23*16, 24*16, 25*16, 26*16, 27*16, 28*16, 29*16, 30*16, 31*16 }, 32*16 }; static const gfx_layout tilelayout3 = { 8,32, RGN_FRAC(1,3), 6, { 8, 0, RGN_FRAC(1,3)+8, RGN_FRAC(1,3)+0, RGN_FRAC(2,3)+8, RGN_FRAC(2,3)+0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16, 8*16, 9*16, 10*16, 11*16, 12*16, 13*16, 14*16, 15*16, 16*16, 17*16, 18*16, 19*16, 20*16, 21*16, 22*16, 23*16, 24*16, 25*16, 26*16, 27*16, 28*16, 29*16, 30*16, 31*16 }, 32*16 }; static GFXDECODE_START( iqblock ) GFXDECODE_ENTRY( "gfx1", 0, tilelayout1, 0, 16 ) /* only odd color codes are used */ GFXDECODE_ENTRY( "gfx2", 0, tilelayout2, 0, 4 ) /* only color codes 0 and 3 used */ GFXDECODE_END static GFXDECODE_START( cabaret ) GFXDECODE_ENTRY( "gfx1", 0, tilelayout1, 0, 16 ) GFXDECODE_ENTRY( "gfx2", 0, tilelayout3, 0, 16 ) GFXDECODE_END static MACHINE_DRIVER_START( iqblock ) /* basic machine hardware */ MDRV_CPU_ADD("main", Z80,12000000/2) /* 6 MHz */ MDRV_CPU_PROGRAM_MAP(main_map,0) MDRV_CPU_IO_MAP(main_portmap,0) MDRV_CPU_VBLANK_INT_HACK(iqblock_interrupt,16) MDRV_DEVICE_ADD( "ppi8255", PPI8255 ) MDRV_DEVICE_CONFIG( ppi8255_intf ) /* 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(64*8, 32*8) MDRV_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 30*8-1) MDRV_GFXDECODE(iqblock) MDRV_PALETTE_LENGTH(1024) MDRV_VIDEO_START(iqblock) MDRV_VIDEO_UPDATE(iqblock) /* sound hardware */ MDRV_SPEAKER_STANDARD_MONO("mono") MDRV_SOUND_ADD("ym", YM2413, 3579545) MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MACHINE_DRIVER_END static MACHINE_DRIVER_START( cabaret ) /* basic machine hardware */ MDRV_CPU_ADD("main", Z180,12000000/2) /* 6 MHz , appears to use Z180 instructions */ MDRV_CPU_PROGRAM_MAP(main_map,0) MDRV_CPU_IO_MAP(main_portmap,0) MDRV_CPU_VBLANK_INT_HACK(iqblock_interrupt,16) MDRV_DEVICE_ADD( "ppi8255", PPI8255 ) MDRV_DEVICE_CONFIG( ppi8255_intf ) /* 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(64*8, 32*8) MDRV_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 30*8-1) MDRV_GFXDECODE(cabaret) MDRV_PALETTE_LENGTH(1024) MDRV_VIDEO_START(iqblock) MDRV_VIDEO_UPDATE(iqblock) /* sound hardware */ MDRV_SPEAKER_STANDARD_MONO("mono") MDRV_SOUND_ADD("ym", YM2413, 3579545) MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MACHINE_DRIVER_END /*************************************************************************** Game driver(s) ***************************************************************************/ ROM_START( iqblock ) ROM_REGION( 0x20000, "main", 0 ) /* 64k for code + 64K for extra RAM */ ROM_LOAD( "u7.v5", 0x0000, 0x10000, CRC(811f306e) SHA1(d0aef80f1624002d05721276358f26a3ef69a3f6) ) ROM_REGION( 0x8000, "user1", 0 ) ROM_LOAD( "u8.6", 0x0000, 0x8000, CRC(2651bc27) SHA1(53e1d6ffd78c8a612863b29b0f8734e740d563c7) ) /* background maps, read by the CPU */ ROM_REGION( 0x60000, "gfx1", ROMREGION_DISPOSE ) ROM_LOAD( "u28.1", 0x00000, 0x20000, CRC(ec4b64b4) SHA1(000e9df0c0b5fcde5ead218dfcdc156bc4be909d) ) ROM_LOAD( "u27.2", 0x20000, 0x20000, CRC(74aa3de3) SHA1(16757c24765d22026793a0c53d3f24c106951a18) ) ROM_LOAD( "u26.3", 0x40000, 0x20000, CRC(2896331b) SHA1(51eba9f9f653a11cb96c461ab495d943d34cedc6) ) ROM_REGION( 0x8000, "gfx2", ROMREGION_DISPOSE ) ROM_LOAD( "u25.4", 0x0000, 0x4000, CRC(8fc222af) SHA1(ac1fb5e6caec391a76e3af51e133aecc65cd5aed) ) ROM_LOAD( "u24.5", 0x4000, 0x4000, CRC(61050e1e) SHA1(1f7185b2a5a2e237120276c95344744b146b4bf6) ) ROM_END /* Grand Tour IGS, 1993 This game probably runs on the same board as IGS's IQ Block. Two of the PALs are labelled GRAND3 and GRAND4. However, there may be other games that run on this same PCB also, since three of the PALs are labelled AF1, AF2 and AF3, meaning the main/first game to run on this hardware was called A-something F-something. PCB Layout ---------- IGS PCB N0. 0036-5 ---------------------------------------------- | 6264 | | UM3567 GRAND6 | | 3.579545MHz GRAND1 | | GRAND7 | | GRAND2 | |J | |A GRAND3 | |M Z80 | |M GRAND4 | |A PAL | | 6116 GRAND5 | | 6116 IGS001 IGS002 PAL | | 6264 | | PAL | | 8255 PAL | | PAL 12MHz | | DSW2(8) DSW1(8) | ---------------------------------------------- Notes: Z80 clock: 5.997MHz VSync: 60Hz HSync: 15.21kHz UM3567 compatible with YM2413 */ ROM_START( grndtour ) ROM_REGION( 0x20000, "main", 0 ) /* 64k for code + 64K for extra RAM */ ROM_LOAD( "grand7.u7", 0x0000, 0x10000, CRC(95cac31e) SHA1(47bbcce6981ea3d38e0aa49ccd3762a4529f3c96) ) ROM_REGION( 0x8000, "user1", 0 ) ROM_LOAD( "grand6.u8", 0x0000, 0x8000, CRC(4c634b86) SHA1(c36df147187bc526f2348bc2f4d4c4e35bb45f38) ) /* background maps, read by the CPU */ ROM_REGION( 0xc0000, "gfx1", ROMREGION_DISPOSE ) ROM_LOAD( "grand1.u28", 0x00000, 0x40000, CRC(de85c664) SHA1(3a4b0cac88a0fea1c80541fe49c799e3550bedee) ) ROM_LOAD( "grand2.u27", 0x40000, 0x40000, CRC(8456204e) SHA1(b604d501f360670f57b937ad96af64c1c2038ef7) ) ROM_LOAD( "grand3.u26", 0x80000, 0x40000, CRC(77632917) SHA1(d91eadec2e0fb3082299362d18814b8ec4c5e068) ) ROM_REGION( 0x8000, "gfx2", ROMREGION_DISPOSE ) ROM_LOAD( "grand4.u25", 0x0000, 0x4000, CRC(48d09746) SHA1(64669f572b9a98b078ee1ea0b614c117e5dfbec9) ) ROM_LOAD( "grand5.u24", 0x4000, 0x4000, CRC(f896efb2) SHA1(8dc8546e363b4ff80983e3b8e2a19ebb7ff30c7b) ) ROM_END ROM_START( cabaret ) ROM_REGION( 0x20000, "main", 0 ) /* 64k for code + 64K for extra RAM */ ROM_LOAD( "cg-8v204.u97", 0x0000, 0x10000, CRC(44cebf77) SHA1(e3f4e4abf41388f0eed50cf9a0fd0b14aa2f8b93) ) ROM_REGION( 0x8000, "user1", 0 ) ROM_LOAD( "cg-7.u98", 0x0000, 0x8000, CRC(b93ae6f8) SHA1(accb87045c278d5d79fff65bb763aa6e8025a945) ) /* background maps, read by the CPU */ ROM_REGION( 0x60000, "gfx1", ROMREGION_DISPOSE ) ROM_LOAD( "cg-4.u43", 0x00000, 0x20000, CRC(e509f50a) SHA1(7e68ca54642c92cdb348d5cf9466065938d0e027) ) ROM_LOAD( "cg-5.u44", 0x20000, 0x20000, CRC(e2cbf489) SHA1(3a15ed7efd5696656e6d55b54ec0ff779bdb0d98) ) ROM_LOAD( "cg-6.u45", 0x40000, 0x20000, CRC(4f2fced7) SHA1(b954856ffdc97fbc99fd3ec087376fbf466d2d5a) ) ROM_REGION( 0xc000, "gfx2", ROMREGION_DISPOSE ) ROM_LOAD( "cg-1.u40", 0x0000, 0x4000, CRC(7dee8b1f) SHA1(80dbdf6aab9b02cc000956b7894023552428e6a1) ) ROM_LOAD( "cg-2.u41", 0x4000, 0x4000, CRC(ce8dea39) SHA1(b30d1678a7b98cd821d2ce7383a83cb7c9f31b5f) ) ROM_LOAD( "cg-3.u42", 0x8000, 0x4000, CRC(7e1f821f) SHA1(b709d49f9d1890fe3b8ca7f90affc0017a0ad95e) ) ROM_END static DRIVER_INIT( iqblock ) { UINT8 *rom = memory_region(machine, "main"); int i; /* decrypt the program ROM */ for (i = 0;i < 0xf000;i++) { if ((i & 0x0282) != 0x0282) rom[i] ^= 0x01; if ((i & 0x0940) == 0x0940) rom[i] ^= 0x02; if ((i & 0x0090) == 0x0010) rom[i] ^= 0x20; } /* initialize pointers for I/O mapped RAM */ paletteram = rom + 0x12000; paletteram_2 = rom + 0x12800; iqblock_fgvideoram = rom + 0x16800; iqblock_bgvideoram = rom + 0x17000; memory_install_write8_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0xfe26, 0xfe26, 0, 0, iqblock_prot_w); iqblock_video_type=1; } static DRIVER_INIT( grndtour ) { UINT8 *rom = memory_region(machine, "main"); int i; /* decrypt the program ROM */ for (i = 0;i < 0xf000;i++) { if ((i & 0x0282) != 0x0282) rom[i] ^= 0x01; if ((i & 0x0940) == 0x0940) rom[i] ^= 0x02; if ((i & 0x0060) == 0x0040) rom[i] ^= 0x20; } /* initialize pointers for I/O mapped RAM */ paletteram = rom + 0x12000; paletteram_2 = rom + 0x12800; iqblock_fgvideoram = rom + 0x16800; iqblock_bgvideoram = rom + 0x17000; memory_install_write8_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0xfe39, 0xfe39, 0, 0, grndtour_prot_w); iqblock_video_type=0; } static DRIVER_INIT( cabaret ) { UINT8 *rom = memory_region(machine, "main"); int i; /* decrypt the program ROM */ for (i = 0;i < 0xf000;i++) { if ((i & 0xb206) == 0xa002) rom[i] ^= 0x01; // could be (i & 0x3206) == 0x2002 } /* initialize pointers for I/O mapped RAM */ paletteram = rom + 0x12000; paletteram_2 = rom + 0x12800; iqblock_fgvideoram = rom + 0x16800; iqblock_bgvideoram = rom + 0x17000; iqblock_video_type=0; } GAME( 1993, iqblock, 0, iqblock, iqblock, iqblock, ROT0, "IGS", "IQ-Block", 0 ) GAME( 1993, grndtour, 0, iqblock, iqblock, grndtour, ROT0, "IGS", "Grand Tour", 0 ) GAME( 19??, cabaret, 0, cabaret, iqblock, cabaret, ROT0, "IGS", "Cabaret", GAME_NOT_WORKING | GAME_NO_SOUND )