// license:BSD-3-Clause // copyright-holders:Nicola Salmoria /*************************************************************************** Eggs & Dommy Very similar to Burger Time hardware (and uses its video driver) driver by Nicola Salmoria To Do: - Sprite Priorities in dommy Rock Duck --------- Rock Duck support added based on preliminary findings by Roberto Fresca It looks like the game may be a ghastly hack of one of the 'eggs' titles (need to check code but gameplay appears to be the same) The dump was from a rom 'blister' (no PCB available) and is missing at least the colour PROM. Some notes by Roberto Fresca: ---------------------------- 1 - The hack was made using "Scrambled Egg" program roms instead of "Eggs". 2 - The code is almost identical to scregg except for a couple of changed zero page registers, some data for gfx, strings, and two new subroutines. Strictly to the code, they re-routed two subroutines to the unused high program space where there are only zeroes: $5732: jmp $7f0e (when start to drawing the screen) This subroutine ($7f0e) is used to draw the game's frame with the holes and tunnel. $30ca: jsr $7f44 (called constantly) This one is amazing!... They made this subroutine ($7f44) only to protect the string "(R)DATEL SAS" placed at bottom-right of the screen. The code compare the string stored in rom ($62d8 - $62e1) against the one drawn in the videoram ($13cf - $13d8"). If something is different, just jump to a reset ($3003) and the game starts again. Obviously the string isn't easily visible. You need some arithmetic to show it as ASCII text. ***************************************************************************/ #include "emu.h" #include "includes/btime.h" #include "cpu/m6502/m6502.h" #include "machine/timer.h" #include "sound/ay8910.h" #include "speaker.h" class scregg_state : public btime_state { public: scregg_state(const machine_config &mconfig, device_type type, const char *tag) : btime_state(mconfig, type, tag) { } void scregg(machine_config &config); void dommy(machine_config &config); void init_rockduck(); private: DECLARE_WRITE8_MEMBER(scregg_irqack_w); DECLARE_READ8_MEMBER(scregg_irqack_r); DECLARE_MACHINE_START(scregg); DECLARE_MACHINE_RESET(scregg); TIMER_DEVICE_CALLBACK_MEMBER(scregg_interrupt); void dommy_map(address_map &map); void eggs_map(address_map &map); }; TIMER_DEVICE_CALLBACK_MEMBER(scregg_state::scregg_interrupt) { // assume that the irq generator is similar to burgertime hw m_maincpu->set_input_line(0, (param & 8) ? ASSERT_LINE : CLEAR_LINE); } WRITE8_MEMBER(scregg_state::scregg_irqack_w) { m_maincpu->set_input_line(0, CLEAR_LINE); } READ8_MEMBER(scregg_state::scregg_irqack_r) { m_maincpu->set_input_line(0, CLEAR_LINE); return 0; } void scregg_state::dommy_map(address_map &map) { map(0x0000, 0x07ff).ram(); map(0x2000, 0x23ff).ram().share("videoram"); map(0x2400, 0x27ff).ram().share("colorram"); map(0x2800, 0x2bff).rw(FUNC(scregg_state::btime_mirrorvideoram_r), FUNC(scregg_state::btime_mirrorvideoram_w)); map(0x4000, 0x4000).portr("DSW1").w(FUNC(scregg_state::scregg_irqack_w)); map(0x4001, 0x4001).portr("DSW2").w(FUNC(scregg_state::btime_video_control_w)); map(0x4002, 0x4002).portr("P1"); map(0x4003, 0x4003).portr("P2"); map(0x4004, 0x4005).w("ay1", FUNC(ay8910_device::address_data_w)).r(FUNC(scregg_state::scregg_irqack_r)); map(0x4006, 0x4007).w("ay2", FUNC(ay8910_device::address_data_w)); map(0xa000, 0xffff).rom(); } void scregg_state::eggs_map(address_map &map) { map(0x0000, 0x07ff).ram(); map(0x1000, 0x13ff).ram().share("videoram"); map(0x1400, 0x17ff).ram().share("colorram"); map(0x1800, 0x1bff).rw(FUNC(scregg_state::btime_mirrorvideoram_r), FUNC(scregg_state::btime_mirrorvideoram_w)); map(0x1c00, 0x1fff).rw(FUNC(scregg_state::btime_mirrorcolorram_r), FUNC(scregg_state::btime_mirrorcolorram_w)); map(0x2000, 0x2000).portr("DSW1").w(FUNC(scregg_state::btime_video_control_w)); map(0x2001, 0x2001).portr("DSW2").w(FUNC(scregg_state::scregg_irqack_w)); map(0x2002, 0x2002).portr("P1"); map(0x2003, 0x2003).portr("P2"); map(0x2004, 0x2005).w("ay1", FUNC(ay8910_device::address_data_w)).r(FUNC(scregg_state::scregg_irqack_r)); map(0x2006, 0x2007).w("ay2", FUNC(ay8910_device::address_data_w)); map(0x3000, 0x7fff).rom(); map(0xf000, 0xffff).rom(); /* reset/interrupt vectors */ } static INPUT_PORTS_START( scregg ) PORT_START("P1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_START("P2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_4WAY PORT_COCKTAIL PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_4WAY PORT_COCKTAIL PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_4WAY PORT_COCKTAIL PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_4WAY PORT_COCKTAIL PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_START2 ) PORT_START("DSW1") PORT_DIPNAME( 0x03, 0x03, DEF_STR( Coin_A ) ) PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x03, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x01, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x02, DEF_STR( 1C_3C ) ) PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Coin_B ) ) PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x0c, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x04, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x08, DEF_STR( 1C_3C ) ) 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, 0x00, DEF_STR( Cabinet ) ) PORT_DIPSETTING( 0x00, DEF_STR( Upright ) ) PORT_DIPSETTING( 0x40, DEF_STR( Cocktail ) ) PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen") PORT_START("DSW2") PORT_DIPNAME( 0x01, 0x01, DEF_STR( Lives ) ) PORT_DIPSETTING( 0x01, "3" ) PORT_DIPSETTING( 0x00, "5" ) PORT_DIPNAME( 0x06, 0x04, DEF_STR( Bonus_Life ) ) PORT_DIPSETTING( 0x04, "30000" ) PORT_DIPSETTING( 0x02, "50000" ) PORT_DIPSETTING( 0x00, "70000" ) PORT_DIPSETTING( 0x06, "Never" ) PORT_DIPNAME( 0x08, 0x00, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x08, DEF_STR( On ) ) PORT_DIPNAME( 0x10, 0x00, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x10, DEF_STR( On ) ) PORT_DIPNAME( 0x20, 0x00, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x20, DEF_STR( On ) ) PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unused ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x40, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x80, DEF_STR( Difficulty ) ) PORT_DIPSETTING( 0x80, DEF_STR( Easy ) ) PORT_DIPSETTING( 0x00, DEF_STR( Hard ) ) INPUT_PORTS_END static INPUT_PORTS_START( rockduck ) PORT_INCLUDE( scregg ) PORT_MODIFY("DSW2") PORT_DIPNAME( 0x01, 0x01, DEF_STR( Lives ) ) PORT_DIPSETTING( 0x01, "2" ) PORT_DIPSETTING( 0x00, "3" ) INPUT_PORTS_END static const gfx_layout charlayout = { 8,8, /* 8*8 characters */ 1024, /* 1024 characters */ 3, /* 3 bits per pixel */ { 2*1024*8*8, 1024*8*8, 0 }, /* the bitplanes are separated */ { 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 /* every char takes 8 consecutive bytes */ }; static const gfx_layout spritelayout = { 16,16, /* 16*16 sprites */ 256, /* 256 sprites */ 3, /* 3 bits per pixel */ { 2*256*16*16, 256*16*16, 0 }, /* the bitplanes are separated */ { 16*8+0, 16*8+1, 16*8+2, 16*8+3, 16*8+4, 16*8+5, 16*8+6, 16*8+7, 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, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, 32*8 /* every sprite takes 32 consecutive bytes */ }; static GFXDECODE_START( gfx_scregg ) GFXDECODE_ENTRY( "gfx1", 0, charlayout, 0, 1 ) /* char set #1 */ GFXDECODE_ENTRY( "gfx1", 0, spritelayout, 0, 1 ) /* sprites */ GFXDECODE_END MACHINE_START_MEMBER(scregg_state,scregg) { save_item(NAME(m_btime_palette)); save_item(NAME(m_bnj_scroll1)); save_item(NAME(m_bnj_scroll2)); save_item(NAME(m_btime_tilemap)); } MACHINE_RESET_MEMBER(scregg_state,scregg) { m_btime_palette = 0; m_bnj_scroll1 = 0; m_bnj_scroll2 = 0; m_btime_tilemap[0] = 0; m_btime_tilemap[1] = 0; m_btime_tilemap[2] = 0; m_btime_tilemap[3] = 0; } void scregg_state::dommy(machine_config &config) { /* basic machine hardware */ M6502(config, m_maincpu, XTAL(12'000'000)/8); m_maincpu->set_addrmap(AS_PROGRAM, &scregg_state::dommy_map); TIMER(config, "irq").configure_scanline(FUNC(scregg_state::scregg_interrupt), "screen", 0, 8); MCFG_MACHINE_START_OVERRIDE(scregg_state,scregg) MCFG_MACHINE_RESET_OVERRIDE(scregg_state,scregg) /* video hardware */ SCREEN(config, m_screen, SCREEN_TYPE_RASTER); m_screen->set_raw(XTAL(12'000'000)/2, 384, 8, 248, 272, 8, 248); m_screen->set_screen_update(FUNC(scregg_state::screen_update_eggs)); m_screen->set_palette(m_palette); GFXDECODE(config, m_gfxdecode, m_palette, gfx_scregg); PALETTE(config, m_palette, FUNC(scregg_state::btime_palette), 8); /* sound hardware */ SPEAKER(config, "mono").front_center(); AY8910(config, "ay1", XTAL(12'000'000)/8).add_route(ALL_OUTPUTS, "mono", 0.23); AY8910(config, "ay2", XTAL(12'000'000)/8).add_route(ALL_OUTPUTS, "mono", 0.23); } void scregg_state::scregg(machine_config &config) { /* basic machine hardware */ M6502(config, m_maincpu, XTAL(12'000'000)/8); m_maincpu->set_addrmap(AS_PROGRAM, &scregg_state::eggs_map); TIMER(config, "irq").configure_scanline(FUNC(scregg_state::scregg_interrupt), "screen", 0, 8); MCFG_MACHINE_START_OVERRIDE(scregg_state,scregg) MCFG_MACHINE_RESET_OVERRIDE(scregg_state,scregg) /* video hardware */ SCREEN(config, m_screen, SCREEN_TYPE_RASTER); m_screen->set_raw(XTAL(12'000'000)/2, 384, 8, 248, 272, 8, 248); m_screen->set_screen_update(FUNC(scregg_state::screen_update_eggs)); m_screen->set_palette(m_palette); GFXDECODE(config, m_gfxdecode, m_palette, gfx_scregg); PALETTE(config, m_palette, FUNC(scregg_state::btime_palette), 8); /* sound hardware */ SPEAKER(config, "mono").front_center(); AY8910(config, "ay1", XTAL(12'000'000)/8).add_route(ALL_OUTPUTS, "mono", 0.23); AY8910(config, "ay2", XTAL(12'000'000)/8).add_route(ALL_OUTPUTS, "mono", 0.23); } ROM_START( dommy ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "dommy.e01", 0xa000, 0x2000, CRC(9ae064ed) SHA1(73082e5254d54d8386f580cc82a74242a6debd84) ) ROM_LOAD( "dommy.e11", 0xc000, 0x2000, CRC(7c4fad5c) SHA1(fb733ac979092a6fc278836b82d8ed3fae7a20d9) ) ROM_LOAD( "dommy.e21", 0xe000, 0x2000, CRC(cd1a4d55) SHA1(f7f4f5ef2e89519652e8401e75dc4e2b8edf4bae) ) ROM_REGION( 0x6000, "gfx1", 0 ) ROM_LOAD( "dommy.e50", 0x0000, 0x2000, CRC(5e9db0a4) SHA1(82e60d6b65a4d901102d7e195e66b278f18586f7) ) ROM_LOAD( "dommy.e40", 0x2000, 0x2000, CRC(4d1c36fb) SHA1(5904421e8e2f727dd6292045871429a1373085e9) ) ROM_LOAD( "dommy.e30", 0x4000, 0x2000, CRC(4e68bb12) SHA1(de26d278e43882deffad4d5b19d785f8824cf05a) ) ROM_REGION( 0x0040, "proms", 0 ) /* palette decoding is probably wrong */ ROM_LOAD( "dommy.e70", 0x0018, 0x0008, CRC(50c1d86e) SHA1(990a87a7f7e6a2af67dc6890e2326c7403e46520) ) /* palette */ ROM_CONTINUE( 0x0000, 0x0018 ) ROM_LOAD( "dommy.e60", 0x0020, 0x0020, CRC(24da2b63) SHA1(4db7e1ff1b9fd5ae4098cd7ca66cf1fa2574501a) ) /* unknown */ ROM_END ROM_START( scregg ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "d00.e14", 0x3000, 0x1000, CRC(29226d77) SHA1(e1a329a4452eeb90801d001140ce865bf1ea7716) ) ROM_LOAD( "d10.d14", 0x4000, 0x1000, CRC(eb143880) SHA1(73b3ca6e0d72cd0db951ae9ed1552cf8b7d91e68) ) ROM_LOAD( "d20.c14", 0x5000, 0x1000, CRC(4455f262) SHA1(fc7b2d9094fa5e25c1bf4b68386f640f4502e0c0) ) ROM_LOAD( "d30.b14", 0x6000, 0x1000, CRC(044ac5d2) SHA1(f2d2fe2236de1b3b2614cc95f61a90571638cd69) ) ROM_LOAD( "d40.a14", 0x7000, 0x1000, CRC(b5a0814a) SHA1(192cdc506fb0bbfed8ae687f2699397ace3bef30) ) ROM_RELOAD( 0xf000, 0x1000 ) /* for reset/interrupt vectors */ ROM_REGION( 0x6000, "gfx1", 0 ) ROM_LOAD( "d50.j12", 0x0000, 0x1000, CRC(a485c10c) SHA1(88edd35479ceb58244f644a7e0520d225df3bf65) ) ROM_LOAD( "d60.j10", 0x1000, 0x1000, CRC(1fd4e539) SHA1(3067bbd9493614e80d8d3982fe80ef25688d256c) ) ROM_LOAD( "d70.h12", 0x2000, 0x1000, CRC(8454f4b2) SHA1(6a8d257a3fec901453c7216ad894badf96188ebf) ) ROM_LOAD( "d80.h10", 0x3000, 0x1000, CRC(72bd89ee) SHA1(2e38c27b546eeef0fe42340777c8687f4c65ee97) ) ROM_LOAD( "d90.g12", 0x4000, 0x1000, CRC(ff3c2894) SHA1(0da866db6a79f658de3efc609b9ca8520b4d22d0) ) ROM_LOAD( "da0.g10", 0x5000, 0x1000, CRC(9c20214a) SHA1(e01b72501a01ffc0370cf19c9a379a54800cccc6) ) ROM_REGION( 0x0040, "proms", 0 ) ROM_LOAD( "dc0.c6", 0x0000, 0x0020, CRC(ff23bdd6) SHA1(d09738915da456449bb4e8d9eefb8e6378f0edea) ) /* palette */ ROM_LOAD( "db1.b4", 0x0020, 0x0020, CRC(7cc4824b) SHA1(2a283fc17fac32e63385948bfe180d05f1fb8727) ) /* unknown */ ROM_END ROM_START( eggs ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "e14.bin", 0x3000, 0x1000, CRC(4e216f9d) SHA1(7b9d984481c8227e417dae4a1adbb5dec5f959b7) ) ROM_LOAD( "d14.bin", 0x4000, 0x1000, CRC(4edb267f) SHA1(f5d1a79b13d6fbb92561b4e4cfb78465114497d1) ) ROM_LOAD( "c14.bin", 0x5000, 0x1000, CRC(15a5c48c) SHA1(70141c739a8c019554a6c5257ad12606a1542b1f) ) ROM_LOAD( "b14.bin", 0x6000, 0x1000, CRC(5c11c00e) SHA1(4a9295086bf935a1c9b1b01f83d1ff6242d74907) ) ROM_LOAD( "a14.bin", 0x7000, 0x1000, CRC(953faf07) SHA1(ee3181e9ee664053d6e6899fe38e136a9ea6abe1) ) ROM_RELOAD( 0xf000, 0x1000 ) /* for reset/interrupt vectors */ ROM_REGION( 0x6000, "gfx1", 0 ) ROM_LOAD( "j12.bin", 0x0000, 0x1000, CRC(ce4a2e46) SHA1(6b31c481ca038834ae295d015054f852baa6330f) ) ROM_LOAD( "j10.bin", 0x1000, 0x1000, CRC(a1bcaffc) SHA1(74f6df3136826822bbc22b027700fb3ddfceaa97) ) ROM_LOAD( "h12.bin", 0x2000, 0x1000, CRC(9562836d) SHA1(c5d5d6ceede6105975c87ff8e1f7e5312b992b92) ) ROM_LOAD( "h10.bin", 0x3000, 0x1000, CRC(3cfb3a8e) SHA1(e60c9da1a7841c3bb5351a109d99c8df34747212) ) ROM_LOAD( "g12.bin", 0x4000, 0x1000, CRC(679f8af7) SHA1(f69302ff0125d96fbfdd914d7ecefd7130a24616) ) ROM_LOAD( "g10.bin", 0x5000, 0x1000, CRC(5b58d3b5) SHA1(f138b7294dd20d050bb8a2191e87b0c3815f6148) ) ROM_REGION( 0x0040, "proms", 0 ) ROM_LOAD( "eggs.c6", 0x0000, 0x0020, CRC(e8408c81) SHA1(549b9948a4a73e7a704731b942565183cef05d52) ) /* palette */ ROM_LOAD( "db1.b4", 0x0020, 0x0020, CRC(7cc4824b) SHA1(2a283fc17fac32e63385948bfe180d05f1fb8727) ) /* unknown */ ROM_END // rockduck - check gfx roms (planes) order ROM_START( rockduck ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "rde.bin", 0x4000, 0x2000, CRC(56e2a030) SHA1(f03cca53ac30f1c4ec45afbe58c231673739e425) ) ROM_COPY( "maincpu", 0x5000, 0x3000, 0x1000 ) // rgn,srcoffset,offset,length. ROM_LOAD( "rdc.bin", 0x6000, 0x2000, CRC(482d9a0c) SHA1(2838cbcd35edaf19848fcf1588ec3a35adf5b179) ) ROM_COPY( "maincpu", 0x7000, 0x5000, 0x1000 ) // rgn,srcoffset,offset,length. ROM_LOAD( "rdb.bin", 0x8000, 0x2000, CRC(974626f2) SHA1(cfd767947df9aa99b22afbc0a83afd3f92e7d903) ) ROM_RELOAD( 0xe000, 0x2000 ) // for vectors/pointers ROM_COPY( "maincpu", 0x9000, 0x7000, 0x1000 ) // rgn,srcoffset,offset,length. // ROM_LOAD( "b.bin", 0x8000, 0x2000, CRC(637fbb50) SHA1(b31799f9cc6aefd9f4b39cc1afb1ca00d9200efb) ) // alternate rom, bad dump // this rom is a bad dump of rdb.bin with only 1 bit different. // (bit 5 is on at offset $1629). ROM_REGION( 0x8000, "gfx1", 0 ) ROM_LOAD( "rd3.rdg", 0x0000, 0x2000, CRC(8a3f1e53) SHA1(398bbbab314e4ea87cc5f5978c7e806818398d02) ) // not scrambled ROM_LOAD( "rd2.rdh", 0x2000, 0x2000, CRC(e94e673e) SHA1(0adf01d35879b9dd355d0c53a51b5f416f22d7b2) ) ROM_LOAD( "rd1.rdj", 0x4000, 0x2000, CRC(654afff2) SHA1(f1e21447f0a2ac23cd64cf1f6f315937787b6377) ) ROM_REGION( 0x0040, "proms", 0 ) /* no proms were in the rock duck set and no PCB available, use eggs palette for now, although its probably wrong */ ROM_LOAD( "eggs.c6", 0x0000, 0x0020, BAD_DUMP CRC(e8408c81) SHA1(549b9948a4a73e7a704731b942565183cef05d52) ) /* palette */ // ROM_LOAD( "screggco.b4", 0x0020, 0x0020, BAD_DUMP CRC(7cc4824b) SHA1(2a283fc17fac32e63385948bfe180d05f1fb8727) ) /* unknown */ ROM_END void scregg_state::init_rockduck() { // rd2.rdh and rd1.rdj are bitswapped, but not rd3.rdg .. are they really from the same board? uint8_t *src = memregion("gfx1")->base(); for (int x = 0x2000; x < 0x6000; x++) { src[x] = bitswap<8>(src[x],2,0,3,6,1,4,7,5); } } GAME( 1983, dommy, 0, dommy, scregg, scregg_state, empty_init, ROT270, "Technos Japan", "Dommy", MACHINE_SUPPORTS_SAVE ) GAME( 1983, scregg, 0, scregg, scregg, scregg_state, empty_init, ROT270, "Technos Japan", "Scrambled Egg", MACHINE_SUPPORTS_SAVE ) GAME( 1983, eggs, scregg, scregg, scregg, scregg_state, empty_init, ROT270, "Technos Japan (Universal USA license)", "Eggs (USA)", MACHINE_SUPPORTS_SAVE ) GAME( 1983, rockduck, 0, scregg, rockduck, scregg_state, init_rockduck, ROT270, "Datel SAS", "Rock Duck (prototype?)", MACHINE_WRONG_COLORS | MACHINE_SUPPORTS_SAVE )