/**************************************************************************** Tug Boat 6502 hooked up + preliminary video by MooglyGuy TODO: - verify connections of the two PIAs. I only hooked up a couple of ports but there are more. - check how the score is displayed. I'm quite sure that tugboat_score_w is supposed to access videoram scanning it by columns (like btime_mirrorvideoram_w), but the current implementation is a big kludge, and it still looks wrong. - colors might not be entirely accurate Suspect berenstn is using the wrong color PROM. the problem which caused the controls not to work --- There's counter at $000b, counting up from $ff to 0 or from $fe to 0 (initial value depends on game level). It's increased in main loop, and used for game flow control (scrolling speed , controls etc). Every interrupt, when (counter&3)!=0 , there's a check for left/right inputs . But when init val was $ff (2nd level), the condition 'counter&3!=0' was always false - counter was reloaded and incremented before interrupt occurs ****************************************************************************/ #include "emu.h" #include "cpu/m6502/m6502.h" #include "machine/6821pia.h" #include "sound/ay8910.h" class tugboat_state : public driver_device { public: tugboat_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) { } UINT8 *m_ram; UINT8 m_hd46505_0_reg[18]; UINT8 m_hd46505_1_reg[18]; int m_reg0; int m_reg1; int m_ctrl; }; /* there isn't the usual resistor array anywhere near the color prom, just four 1k resistors. */ static PALETTE_INIT( tugboat ) { int i; for (i = 0;i < machine.total_colors();i++) { int r,g,b,brt; brt = ((color_prom[i] >> 3) & 0x01) ? 0xff : 0x80; r = brt * ((color_prom[i] >> 0) & 0x01); g = brt * ((color_prom[i] >> 1) & 0x01); b = brt * ((color_prom[i] >> 2) & 0x01); palette_set_color(machine,i,MAKE_RGB(r,g,b)); } } /* see mc6845.c. That file is only a placeholder, I process the writes here because I need the start_addr register to handle scrolling */ static WRITE8_HANDLER( tugboat_hd46505_0_w ) { tugboat_state *state = space->machine().driver_data(); if (offset == 0) state->m_reg0 = data & 0x0f; else if (state->m_reg0 < 18) state->m_hd46505_0_reg[state->m_reg0] = data; } static WRITE8_HANDLER( tugboat_hd46505_1_w ) { tugboat_state *state = space->machine().driver_data(); if (offset == 0) state->m_reg1 = data & 0x0f; else if (state->m_reg1 < 18) state->m_hd46505_1_reg[state->m_reg1] = data; } static WRITE8_HANDLER( tugboat_score_w ) { tugboat_state *state = space->machine().driver_data(); if (offset>=0x8) state->m_ram[0x291d + 32*offset + 32*(1-8)] = data ^ 0x0f; if (offset<0x8 ) state->m_ram[0x291d + 32*offset + 32*9] = data ^ 0x0f; } static void draw_tilemap(running_machine &machine, bitmap_t *bitmap,const rectangle *cliprect, int addr,int gfx0,int gfx1,int transparency) { tugboat_state *state = machine.driver_data(); int x,y; for (y = 0;y < 32;y++) { for (x = 0;x < 32;x++) { int code = (state->m_ram[addr + 0x400] << 8) | state->m_ram[addr]; int color = (code & 0x3c00) >> 10; int rgn; code &=0x3ff; rgn = gfx0; if (code > 0x1ff) { code &= 0x1ff; rgn = gfx1; } drawgfx_transpen(bitmap,cliprect,machine.gfx[rgn], code, color, 0,0, 8*x,8*y, transparency ? 7 : -1); addr = (addr & 0xfc00) | ((addr + 1) & 0x03ff); } } } static SCREEN_UPDATE( tugboat ) { tugboat_state *state = screen->machine().driver_data(); int startaddr0 = state->m_hd46505_0_reg[0x0c]*256 + state->m_hd46505_0_reg[0x0d]; int startaddr1 = state->m_hd46505_1_reg[0x0c]*256 + state->m_hd46505_1_reg[0x0d]; draw_tilemap(screen->machine(), bitmap,cliprect,startaddr0,0,1,FALSE); draw_tilemap(screen->machine(), bitmap,cliprect,startaddr1,2,3,TRUE); return 0; } static READ8_DEVICE_HANDLER( tugboat_input_r ) { tugboat_state *state = device->machine().driver_data(); if (~state->m_ctrl & 0x80) return input_port_read(device->machine(), "IN0"); else if (~state->m_ctrl & 0x40) return input_port_read(device->machine(), "IN1"); else if (~state->m_ctrl & 0x20) return input_port_read(device->machine(), "IN2"); else if (~state->m_ctrl & 0x10) return input_port_read(device->machine(), "IN3"); else return input_port_read(device->machine(), "IN4"); } static READ8_DEVICE_HANDLER( tugboat_ctrl_r ) { tugboat_state *state = device->machine().driver_data(); return state->m_ctrl; } static WRITE8_DEVICE_HANDLER( tugboat_ctrl_w ) { tugboat_state *state = device->machine().driver_data(); state->m_ctrl = data; } static const pia6821_interface pia0_intf = { DEVCB_HANDLER(tugboat_input_r), /* port A in */ DEVCB_NULL, /* port B in */ DEVCB_NULL, /* line CA1 in */ DEVCB_NULL, /* line CB1 in */ DEVCB_NULL, /* line CA2 in */ DEVCB_NULL, /* line CB2 in */ DEVCB_NULL, /* port A out */ DEVCB_NULL, /* port B out */ DEVCB_NULL, /* line CA2 out */ DEVCB_NULL, /* port CB2 out */ DEVCB_NULL, /* IRQA */ DEVCB_NULL /* IRQB */ }; static const pia6821_interface pia1_intf = { DEVCB_INPUT_PORT("DSW"), /* port A in */ DEVCB_HANDLER(tugboat_ctrl_r), /* port B in */ DEVCB_NULL, /* line CA1 in */ DEVCB_NULL, /* line CB1 in */ DEVCB_NULL, /* line CA2 in */ DEVCB_NULL, /* line CB2 in */ DEVCB_NULL, /* port A out */ DEVCB_HANDLER(tugboat_ctrl_w), /* port B out */ DEVCB_NULL, /* line CA2 out */ DEVCB_NULL, /* port CB2 out */ DEVCB_NULL, /* IRQA */ DEVCB_NULL /* IRQB */ }; static TIMER_CALLBACK( interrupt_gen ) { cputag_set_input_line(machine, "maincpu", 0, HOLD_LINE); machine.scheduler().timer_set(machine.primary_screen->frame_period(), FUNC(interrupt_gen)); } static MACHINE_RESET( tugboat ) { machine.scheduler().timer_set(machine.primary_screen->time_until_pos(30*8+4), FUNC(interrupt_gen)); } static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8 ) AM_RANGE(0x0000, 0x01ff) AM_RAM AM_BASE_MEMBER(tugboat_state, m_ram) AM_RANGE(0x1060, 0x1061) AM_DEVWRITE("aysnd", ay8910_address_data_w) AM_RANGE(0x10a0, 0x10a1) AM_WRITE(tugboat_hd46505_0_w) /* scrolling is performed changing the start_addr register (0C/0D) */ AM_RANGE(0x10c0, 0x10c1) AM_WRITE(tugboat_hd46505_1_w) AM_RANGE(0x11e4, 0x11e7) AM_DEVREADWRITE_MODERN("pia0", pia6821_device, read, write) AM_RANGE(0x11e8, 0x11eb) AM_DEVREADWRITE_MODERN("pia1", pia6821_device, read, write) //AM_RANGE(0x1700, 0x1fff) AM_RAM AM_RANGE(0x18e0, 0x18ef) AM_WRITE(tugboat_score_w) AM_RANGE(0x2000, 0x2fff) AM_RAM /* tilemap RAM */ AM_RANGE(0x4000, 0x7fff) AM_ROM AM_RANGE(0xfff0, 0xffff) AM_ROM /* vectors */ ADDRESS_MAP_END static INPUT_PORTS_START( tugboat ) PORT_START("IN0") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START("IN1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_2WAY PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_2WAY PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START("IN2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START("IN3") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(1) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START2 ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START("IN4") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x40, DEF_STR( On ) ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START("DSW") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_DIPNAME( 0x30, 0x10, DEF_STR( Coinage ) ) PORT_DIPSETTING( 0x00, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x10, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x20, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x30, DEF_STR( 1C_4C ) ) PORT_DIPNAME( 0x40, 0x00, DEF_STR( Lives ) ) PORT_DIPSETTING( 0x00, "3" ) PORT_DIPSETTING( 0x40, "5" ) PORT_DIPNAME( 0x80, 0x00, DEF_STR( Unknown ) ) PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x80, DEF_STR( On ) ) INPUT_PORTS_END static INPUT_PORTS_START( noahsark ) PORT_INCLUDE( tugboat ) PORT_MODIFY("IN1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY INPUT_PORTS_END static const gfx_layout charlayout = { 8,8, RGN_FRAC(1,3), 3, { RGN_FRAC(2,3), RGN_FRAC(1,3), RGN_FRAC(0,3) }, { 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 }; static GFXDECODE_START( tugboat ) GFXDECODE_ENTRY( "gfx1", 0, charlayout, 0x80, 16 ) GFXDECODE_ENTRY( "gfx2", 0, charlayout, 0x80, 16 ) GFXDECODE_ENTRY( "gfx3", 0, charlayout, 0x00, 16 ) GFXDECODE_ENTRY( "gfx4", 0, charlayout, 0x00, 16 ) GFXDECODE_END static MACHINE_CONFIG_START( tugboat, tugboat_state ) MCFG_CPU_ADD("maincpu", M6502, 2000000) /* 2 MHz ???? */ MCFG_CPU_PROGRAM_MAP(main_map) MCFG_CPU_VBLANK_INT("screen", nmi_line_pulse) MCFG_MACHINE_RESET(tugboat) MCFG_PIA6821_ADD("pia0", pia0_intf) MCFG_PIA6821_ADD("pia1", pia1_intf) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16) MCFG_SCREEN_SIZE(32*8,32*8) MCFG_SCREEN_VISIBLE_AREA(1*8,31*8-1,2*8,30*8-1) MCFG_SCREEN_UPDATE(tugboat) MCFG_GFXDECODE(tugboat) MCFG_PALETTE_LENGTH(256) MCFG_PALETTE_INIT(tugboat) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("aysnd", AY8910, 2000000) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.35) MACHINE_CONFIG_END ROM_START( tugboat ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "u7.bin", 0x5000, 0x1000, CRC(e81d7581) SHA1(c76327e3b027a5a2af69f8cfafa1f828ad0ebdb1) ) ROM_LOAD( "u8.bin", 0x6000, 0x1000, CRC(7525de06) SHA1(0722c7a0b89c55162227173679ffbe398ca350a2) ) ROM_LOAD( "u9.bin", 0x7000, 0x1000, CRC(aa4ae687) SHA1(a212eed5d04d6197aa3484ff36059fd7998604a6) ) ROM_RELOAD( 0xf000, 0x1000 ) /* for the vectors */ ROM_REGION( 0x1800, "gfx1", ROMREGION_INVERT ) ROM_LOAD( "u67.bin", 0x0000, 0x0800, CRC(601c425b) SHA1(13ed54ba1307ba3f779293d88c19d0c0f2d91a96) ) ROM_FILL( 0x0800, 0x0800, 0xff ) ROM_FILL( 0x1000, 0x0800, 0xff ) ROM_REGION( 0x3000, "gfx2", ROMREGION_INVERT ) ROM_LOAD( "u68.bin", 0x0000, 0x1000, CRC(d5835182) SHA1(f67c8f93e0d7dd1bf8e3a98756719d386c133d1c) ) ROM_LOAD( "u69.bin", 0x1000, 0x1000, CRC(e6d25878) SHA1(de9096ef3108d031049be1e7f2c5e346d0bc0df1) ) ROM_LOAD( "u70.bin", 0x2000, 0x1000, CRC(34ce2850) SHA1(8883126627ed8a1d2c3bed2a3d169ce35eafc8a3) ) ROM_REGION( 0x1800, "gfx3", 0 ) ROM_LOAD( "u168.bin", 0x0000, 0x0800, CRC(279042fd) SHA1(1361fff1bc532251bbd36b7b60776c2cc137cfba) ) /* labeled u-167 */ ROM_RELOAD( 0x0800, 0x0800 ) ROM_RELOAD( 0x1000, 0x0800 ) ROM_REGION( 0x1800, "gfx4", 0 ) ROM_LOAD( "u170.bin", 0x0000, 0x0800, CRC(64d9f4d7) SHA1(3ff7fc099023512c33ec4583e91e6cbab903e7a8) ) /* labeled u-168 */ ROM_LOAD( "u169.bin", 0x0800, 0x0800, CRC(1a636296) SHA1(bcb18d714328ba3db2d16d74c47a985c16a0bbe2) ) /* labeled u-169 */ ROM_LOAD( "u167.bin", 0x1000, 0x0800, CRC(b9c9b4f7) SHA1(6685d580ae150d7c67bac2786ee4b7a2c28eddc3) ) /* labeled u-170 */ ROM_REGION( 0x0100, "proms", 0 ) ROM_LOAD( "nt2_u128.clr", 0x0000, 0x0100, CRC(236672bf) SHA1(57482d0a23223ef7b211045ad28d3e41e90f961e) ) ROM_END ROM_START( noahsark ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "u6.bin", 0x4000, 0x1000, CRC(3579eeac) SHA1(f54435ac6b31cf81342de83965cf8a8503b26eb8) ) ROM_LOAD( "u7.bin", 0x5000, 0x1000, CRC(64b0afae) SHA1(1fcc17490d1290565be38a817f783604bcefb8be) ) ROM_LOAD( "u8.bin", 0x6000, 0x1000, CRC(02d53f62) SHA1(e51a583a548b4bdaf43d376d5d276325ee448d49) ) ROM_LOAD( "u9.bin", 0x7000, 0x1000, CRC(d425b61c) SHA1(a8d9562435cc910916df4cd7e958468d88ff92e7) ) ROM_RELOAD( 0xf000, 0x1000 ) /* for the vectors */ ROM_REGION( 0x1800, "gfx1", ROMREGION_INVERT ) ROM_LOAD( "u67.bin", 0x0000, 0x0800, CRC(1a77605b) SHA1(8c25750f94895f5820ad4f1fa4ae1ea70ee0aee2) ) ROM_FILL( 0x0800, 0x0800, 0xff ) ROM_FILL( 0x1000, 0x0800, 0xff ) ROM_REGION( 0x3000, "gfx2", ROMREGION_INVERT ) ROM_LOAD( "u68.bin", 0x0000, 0x1000, CRC(6a66eac8) SHA1(3a13c2f5ef45cdd8b8b5db07d8c1417a3304723a) ) ROM_LOAD( "u69.bin", 0x1000, 0x1000, CRC(fa2c279c) SHA1(332fcfcfe605c4132114399c32932507b16752e5) ) ROM_LOAD( "u70.bin", 0x2000, 0x1000, CRC(dcabc7c5) SHA1(68abfdedea518e3a5c90f9f72173e8c05e190535) ) ROM_REGION( 0x1800, "gfx3", 0 ) ROM_LOAD( "u168.bin", 0x0000, 0x0800, CRC(7fc7280f) SHA1(93bf46e421b580edf81177db85cb220073761c57) ) /* labeled u-167 */ ROM_RELOAD( 0x0800, 0x0800 ) ROM_RELOAD( 0x1000, 0x0800 ) ROM_REGION( 0x3000, "gfx4", 0 ) ROM_LOAD( "u170.bin", 0x0000, 0x1000, CRC(ba36641c) SHA1(df206dc4b6f2da7b60bdaa72c8175de928a630a4) ) /* labeled u-168 */ ROM_LOAD( "u169.bin", 0x1000, 0x1000, CRC(68c58207) SHA1(e09f9f8b5f1071fbf8a4883f75f296ec4bc0eca1) ) /* labeled u-169 */ ROM_LOAD( "u167.bin", 0x2000, 0x1000, CRC(76f16c5b) SHA1(a8a8f0ad7dcc57c2bf518fc5e2509ed8fb87f403) ) /* labeled u-170 */ ROM_REGION( 0x0100, "proms", 0 ) ROM_LOAD( "u128.bin", 0x0000, 0x0100, CRC(816784bd) SHA1(47181f4a6ab35c46796ca1d8c130b76f404c188d) ) ROM_END ROM_START( berenstn ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "u6.bin", 0x4000, 0x1000, CRC(e45275a2) SHA1(d788bc5a69b3cdb2596a3b354371ff88d39f6d46) ) ROM_LOAD( "u7.bin", 0x5000, 0x1000, CRC(1984d787) SHA1(c13959c9be075400e9d1668b5404bc73f6db5fe4) ) ROM_LOAD( "u8.bin", 0x6000, 0x1000, CRC(0c4d53b7) SHA1(45bd847fdb7bbfbe53d750003024ef3454faa6e6) ) ROM_LOAD( "u9.bin", 0x7000, 0x1000, CRC(7e058e57) SHA1(e9506fa4ec693abf0dc4e4cbfd4b93bdbcfc9ba4) ) ROM_RELOAD( 0xf000, 0x1000 ) /* for the vectors */ ROM_REGION( 0x1800, "gfx1", ROMREGION_INVERT ) ROM_LOAD( "u67.bin", 0x0000, 0x0800, CRC(1a77605b) SHA1(8c25750f94895f5820ad4f1fa4ae1ea70ee0aee2) ) ROM_FILL( 0x0800, 0x0800, 0xff ) ROM_FILL( 0x1000, 0x0800, 0xff ) ROM_REGION( 0x3000, "gfx2", ROMREGION_INVERT ) ROM_LOAD( "u68.bin", 0x0000, 0x1000, CRC(21bf375f) SHA1(52bc81a4f289a96edfab034445bcf639b1524ada) ) ROM_LOAD( "u69.bin", 0x1000, 0x1000, CRC(9dc770f6) SHA1(5dc16fac72d68b521dbb415935f5e7f682c26d7f) ) ROM_LOAD( "u70.bin", 0x2000, 0x1000, CRC(a810bd45) SHA1(8be531529174c5d4b4f164bd2397116b9d5350db) ) ROM_REGION( 0x1800, "gfx3", 0 ) ROM_LOAD( "u167.bin", 0x0000, 0x0800, CRC(7fc7280f) SHA1(93bf46e421b580edf81177db85cb220073761c57) ) ROM_RELOAD( 0x0800, 0x0800 ) ROM_RELOAD( 0x1000, 0x0800 ) ROM_REGION( 0x3000, "gfx4", 0 ) ROM_LOAD( "u168.bin", 0x0000, 0x0800, CRC(af532ba3) SHA1(b196e294eaf4c25549278fd040b1dad2799e18d5) ) ROM_LOAD( "u169.bin", 0x1000, 0x0800, CRC(07b6e660) SHA1(c755f63cc7c566e200fc11199bfac06a7e8f89e4) ) ROM_LOAD( "u170.bin", 0x2000, 0x0800, CRC(73261eff) SHA1(19edd6957fceb3df12fd29cd5e156a5eb1c70710) ) ROM_REGION( 0x0100, "proms", 0 ) /* Same as Tugboat but is this actually correct? */ ROM_LOAD( "n.t.2-031j.24s10", 0x0000, 0x0100, CRC(236672bf) SHA1(57482d0a23223ef7b211045ad28d3e41e90f961e) ) ROM_END GAME( 1982, tugboat, 0, tugboat, tugboat, 0, ROT90, "Enter-Tech, Ltd.", "Tugboat", GAME_IMPERFECT_GRAPHICS ) GAME( 1983, noahsark, 0, tugboat, noahsark, 0, ROT90, "Enter-Tech, Ltd.", "Noah's Ark", GAME_IMPERFECT_GRAPHICS ) GAME( 1984, berenstn, 0, tugboat, noahsark, 0, ROT90, "Enter-Tech, Ltd.", "The Berenstain Bears in Big Paw's Cave", GAME_IMPERFECT_GRAPHICS | GAME_IMPERFECT_COLORS )