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Diffstat (limited to 'trunk/src/mame/drivers/dambustr.c')
-rw-r--r--trunk/src/mame/drivers/dambustr.c361
1 files changed, 361 insertions, 0 deletions
diff --git a/trunk/src/mame/drivers/dambustr.c b/trunk/src/mame/drivers/dambustr.c
new file mode 100644
index 00000000000..c3bbc7845e8
--- /dev/null
+++ b/trunk/src/mame/drivers/dambustr.c
@@ -0,0 +1,361 @@
+/***************************************************************************
+
+Dambusters
+(c) 1981 South West Research Ltd. (Bristol, UK)
+
+Reverse-engineering and MAME Driver by Norbert Kehrer (August 2006)
+
+2008-08
+Dip locations verified with manual
+
+
+Stephh's notes (based on the games Z80 code and some tests) :
+
+1) 'dambustr'
+
+ - This seems to be a bugfixed version as only the 3 "fire" buttons are
+ tested while entering the initials (code at 0x1e59).
+ - The "Initials Reset" button only affects the initials, not the scores !
+ - The "Disable Background Collision" Dip Switch only prevents you to lose
+ "lives" if you touch the background : you can still be hit by enemies'
+ bullets and be stalled if speed is too low.
+ - There is a setting which is only available in the "test mode", it's the
+ maximum game time. If you don't set it, the game considers it's illimited
+ time (full doesn't decrease). But once you set it to a value, it is not
+ possible to turn the value back to 0 even by reseting the game.
+ - If you go too far without dying, background becomes complete garbage,
+ but it then appears again correctly. Is there a bad dumped ROM or is
+ emulation bugged somewhere ? Verification against real PCB is needed !
+
+2) 'dambustra'
+
+ - There is sort of bug at 0x1e59 : you can't enter a letter in the
+ initials screen while pressing one of the system buttons (SERVICE,
+ "Initials Reset", START1 or START2), and even COIN2.
+ This is because 8 bytes are checked instead of 3 in 'dambustr'.
+ - Same as 'dambustr' otherwise.
+
+3) 'dambustruk'
+
+ - This set is based on 'dambustr' as there is no initials bug (code at 0x1e0f).
+ - The differences with 'dambustr' are :
+ * coinage for 2nd slot
+ * currency and price (but it's still 2 credits to start a game)
+ * score is divided by 10
+
+***************************************************************************/
+
+
+#include "emu.h"
+
+#include "cpu/z80/z80.h"
+#include "audio/galaxian.h"
+#include "includes/galaxold.h"
+#include "machine/7474.h"
+
+
+class dambustr_state : public galaxold_state
+{
+public:
+ dambustr_state(const machine_config &mconfig, device_type type, const char *tag)
+ : galaxold_state(mconfig, type, tag) { }
+
+ int m_noise_data;
+};
+
+
+
+/* FIXME: Really needed? - Should be handled by either interface */
+static WRITE8_DEVICE_HANDLER( dambustr_noise_enable_w )
+{
+ dambustr_state *state = device->machine().driver_data<dambustr_state>();
+ if (data != state->m_noise_data) {
+ state->m_noise_data = data;
+ galaxian_noise_enable_w(device, offset, data);
+ }
+}
+
+
+static ADDRESS_MAP_START( dambustr_map, AS_PROGRAM, 8 )
+ AM_RANGE(0x0000, 0x7fff) AM_ROM
+
+ AM_RANGE(0x8000, 0x8000) AM_WRITE(dambustr_bg_color_w)
+ AM_RANGE(0x8001, 0x8001) AM_WRITE(dambustr_bg_split_line_w)
+
+ AM_RANGE(0xc000, 0xc7ff) AM_RAM
+
+ AM_RANGE(0xd000, 0xd3ff) AM_RAM_WRITE(galaxold_videoram_w) AM_BASE_MEMBER(galaxold_state, m_videoram)
+ AM_RANGE(0xd400, 0xd7ff) AM_READ(galaxold_videoram_r)
+ AM_RANGE(0xd800, 0xd83f) AM_RAM_WRITE(galaxold_attributesram_w) AM_BASE_MEMBER(galaxold_state, m_attributesram)
+ AM_RANGE(0xd840, 0xd85f) AM_RAM AM_BASE_MEMBER(galaxold_state, m_spriteram) AM_SIZE_MEMBER(galaxold_state, m_spriteram_size)
+ AM_RANGE(0xd860, 0xd87f) AM_RAM AM_BASE_MEMBER(galaxold_state, m_bulletsram) AM_SIZE_MEMBER(galaxold_state, m_bulletsram_size)
+
+ AM_RANGE(0xd880, 0xd8ff) AM_RAM
+
+ AM_RANGE(0xe000, 0xe000) AM_READ_PORT("IN0")
+ AM_RANGE(0xe002, 0xe003) AM_WRITE(galaxold_coin_counter_w)
+ AM_RANGE(0xe004, 0xe007) AM_DEVWRITE(GAL_AUDIO, galaxian_lfo_freq_w)
+
+ AM_RANGE(0xe800, 0xefff) AM_READ_PORT("IN1")
+ AM_RANGE(0xe800, 0xe802) AM_DEVWRITE(GAL_AUDIO, galaxian_background_enable_w)
+ AM_RANGE(0xe803, 0xe803) AM_DEVWRITE(GAL_AUDIO, dambustr_noise_enable_w)
+ AM_RANGE(0xe804, 0xe804) AM_DEVWRITE(GAL_AUDIO, galaxian_shoot_enable_w) // probably louder than normal shot
+ AM_RANGE(0xe805, 0xe805) AM_DEVWRITE(GAL_AUDIO, galaxian_shoot_enable_w) // normal shot (like Galaxian)
+ AM_RANGE(0xe806, 0xe807) AM_DEVWRITE(GAL_AUDIO, galaxian_vol_w)
+
+ AM_RANGE(0xf000, 0xf7ff) AM_READ_PORT("DSW")
+ AM_RANGE(0xf001, 0xf001) AM_WRITE(galaxold_nmi_enable_w)
+ AM_RANGE(0xf004, 0xf004) AM_WRITE(galaxold_stars_enable_w)
+ AM_RANGE(0xf006, 0xf006) AM_WRITE(galaxold_flip_screen_x_w)
+ AM_RANGE(0xf007, 0xf007) AM_WRITE(galaxold_flip_screen_y_w)
+
+ AM_RANGE(0xf800, 0xf800) AM_DEVWRITE(GAL_AUDIO, galaxian_pitch_w)
+ AM_RANGE(0xf800, 0xffff) AM_READ(watchdog_reset_r)
+ADDRESS_MAP_END
+
+
+/* verified from Z80 code */
+static INPUT_PORTS_START( dambustr )
+ PORT_START("IN0")
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_COIN2 )
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 )
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_START2 )
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_START1 )
+ PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Initials Reset") PORT_CODE(KEYCODE_0)
+ PORT_SERVICE_NO_TOGGLE( 0x40, IP_ACTIVE_HIGH )
+ PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_BUTTON3 )
+
+ PORT_START("IN1")
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 )
+ PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON1 )
+ PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) PORT_4WAY
+ PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) PORT_4WAY
+ PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) PORT_4WAY
+ PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) PORT_4WAY
+ PORT_DIPNAME( 0x40, 0x40, "Coin Counters" ) PORT_DIPLOCATION("SW:!1")
+ PORT_DIPSETTING( 0x00, "1" )
+ PORT_DIPSETTING( 0x40, "2" )
+ PORT_DIPNAME( 0x80, 0x80, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW:!2")
+ PORT_DIPSETTING( 0x80, DEF_STR( 1C_1C ) ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x00)
+ PORT_DIPSETTING( 0x00, DEF_STR( 1C_2C ) ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x00)
+ PORT_DIPSETTING( 0x80, "A 1/1 B 1/2" ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x40)
+ PORT_DIPSETTING( 0x00, "A 1/2 B 1/6" ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x40)
+
+ PORT_START("DSW")
+ PORT_DIPNAME( 0x03, 0x00, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW:!3,!4")
+ PORT_DIPSETTING( 0x00, "3" )
+ PORT_DIPSETTING( 0x02, "4" )
+ PORT_DIPSETTING( 0x01, "5" )
+ PORT_DIPSETTING( 0x03, "6" )
+ PORT_DIPNAME( 0x04, 0x00, "Disable Background Collision (Cheat)" ) PORT_DIPLOCATION("SW:!5") /* see notes - manual says must be OFF */
+ PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( On ) )
+ PORT_DIPNAME( 0x08, 0x00, "Union Jack Flag" ) PORT_DIPLOCATION("SW:!6")
+ PORT_DIPSETTING( 0x08, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_BIT( 0xf0, IP_ACTIVE_HIGH, IPT_UNUSED )
+INPUT_PORTS_END
+
+/* verified from Z80 code */
+static INPUT_PORTS_START( dambustruk )
+ PORT_INCLUDE(dambustr)
+
+ PORT_MODIFY("IN1")
+ PORT_DIPNAME( 0x80, 0x80, DEF_STR( Coinage ) ) PORT_DIPLOCATION("SW:!2")
+ PORT_DIPSETTING( 0x80, DEF_STR( 1C_1C ) ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x00)
+ PORT_DIPSETTING( 0x00, DEF_STR( 1C_2C ) ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x00)
+ PORT_DIPSETTING( 0x80, "A 1/1 B 1/6" ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x40)
+ PORT_DIPSETTING( 0x00, "A 1/2 B 1/12" ) PORT_CONDITION("IN1", 0x40, PORTCOND_EQUALS, 0x40)
+INPUT_PORTS_END
+
+
+static const gfx_layout dambustr_charlayout =
+{
+ 8,8,
+ RGN_FRAC(1,2),
+ 2,
+ { RGN_FRAC(0,2), RGN_FRAC(1,2) },
+ { 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 const gfx_layout dambustr_spritelayout =
+{
+ 16,16,
+ RGN_FRAC(1,2),
+ 2,
+ { RGN_FRAC(0,2), RGN_FRAC(1,2) },
+ { 0, 1, 2, 3, 4, 5, 6, 7,
+ 8*8+0, 8*8+1, 8*8+2, 8*8+3, 8*8+4, 8*8+5, 8*8+6, 8*8+7 },
+ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
+ 16*8, 17*8, 18*8, 19*8, 20*8, 21*8, 22*8, 23*8 },
+ 32*8
+};
+
+
+static GFXDECODE_START( dambustr )
+ GFXDECODE_ENTRY( "gfx1", 0x0000, dambustr_charlayout, 0, 8 )
+ GFXDECODE_ENTRY( "gfx1", 0x0000, dambustr_spritelayout, 0, 8 )
+GFXDECODE_END
+
+
+static DRIVER_INIT(dambustr)
+{
+ int i, j, tmp;
+ int tmpram[16];
+ UINT8 *rom = machine.region("maincpu")->base();
+ UINT8 *usr = machine.region("user1")->base();
+ UINT8 *gfx = machine.region("gfx1")->base();
+
+ // Bit swap addresses
+ for(i=0; i<4096*4; i++) {
+ rom[i] = usr[BITSWAP16(i,15,14,13,12, 4,10,9,8,7,6,5,3,11,2,1,0)];
+ };
+
+ // Swap program ROMs
+ for(i=0; i<0x1000; i++) {
+ tmp = rom[0x5000+i];
+ rom[0x5000+i] = rom[0x6000+i];
+ rom[0x6000+i] = rom[0x1000+i];
+ rom[0x1000+i] = tmp;
+ };
+
+ // Bit swap in $1000-$1fff and $4000-$5fff
+ for(i=0; i<0x1000; i++) {
+ rom[0x1000+i] = BITSWAP8(rom[0x1000+i],7,6,5,1,3,2,4,0);
+ rom[0x4000+i] = BITSWAP8(rom[0x4000+i],7,6,5,1,3,2,4,0);
+ rom[0x5000+i] = BITSWAP8(rom[0x5000+i],7,6,5,1,3,2,4,0);
+ };
+
+ // Swap graphics ROMs
+ for(i=0;i<0x4000;i+=16) {
+ for(j=0; j<16; j++)
+ tmpram[j] = gfx[i+j];
+ for(j=0; j<8; j++) {
+ gfx[i+j] = tmpram[j*2];
+ gfx[i+j+8] = tmpram[j*2+1];
+ };
+ };
+}
+
+
+
+static MACHINE_CONFIG_START( dambustr, dambustr_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", Z80, 18432000/6) /* 3.072 MHz */
+ MCFG_CPU_PROGRAM_MAP(dambustr_map)
+
+ MCFG_MACHINE_RESET(galaxold)
+
+ MCFG_7474_ADD("7474_9m_1", "7474_9m_1", galaxold_7474_9m_1_callback, NULL)
+ MCFG_7474_ADD("7474_9m_2", "7474_9m_1", NULL, galaxold_7474_9m_2_q_callback)
+
+ MCFG_TIMER_ADD("int_timer", galaxold_interrupt_timer)
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(16000.0/132/2)
+ MCFG_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
+ MCFG_SCREEN_SIZE(32*8, 32*8)
+ MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
+ MCFG_SCREEN_UPDATE(dambustr)
+
+ MCFG_GFXDECODE(dambustr)
+ MCFG_PALETTE_LENGTH(32+2+64+8) /* 32 for the characters, 2 for the bullets, 64 for the stars, 8 for the background */
+
+ MCFG_PALETTE_INIT(dambustr)
+ MCFG_VIDEO_START(dambustr)
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_FRAGMENT_ADD(galaxian_audio)
+MACHINE_CONFIG_END
+
+
+ROM_START( dambustr )
+ ROM_REGION( 0x10000, "maincpu", 0 )
+ ROM_LOAD( "db8a.pr8", 0x4000, 0x1000, CRC(fd041ff4) SHA1(8d27da7bf0c655633711b960cbc23950c8a371ae) )
+ ROM_LOAD( "db6a.pr6", 0x5000, 0x1000, CRC(448db54b) SHA1(c9afbf02bf4d4ac2972ab7ac6adfa4e951ae79c2) )
+ ROM_LOAD( "db7a.pr7", 0x6000, 0x1000, CRC(675b1f5e) SHA1(6a386212a640fb467b6956a4dc5a68476af1cf97) )
+ ROM_LOAD( "db5a.pr5", 0x7000, 0x1000, CRC(75659ecc) SHA1(b61254fb12f3999607abd88d1cc649dcfbf0384c) )
+
+ ROM_REGION( 0x10000,"user1",0)
+ ROM_LOAD( "db11a.pr11", 0x0000, 0x1000, CRC(427bd3fb) SHA1(cdbaef4040fa2e0598a086e320d51ecb26a591dd) )
+ ROM_LOAD( "db9a.pr9", 0x1000, 0x1000, CRC(57164563) SHA1(8471d0660f39511d0afa3cdd63a1e84b0ea80fd0) )
+ ROM_LOAD( "db10a.pr10", 0x2000, 0x1000, CRC(075b9c5e) SHA1(ff6ce873897004c0e796813725e260df85a520f9) )
+ ROM_LOAD( "db12a.pr12", 0x3000, 0x1000, CRC(ed01a68b) SHA1(9dd37c2a25865717a7acdd7e2a3bef26a4cef3d9) )
+
+ ROM_REGION( 0x4000, "gfx1", 0 )
+ ROM_LOAD( "db3a.pr3", 0x0000, 0x1000, CRC(9e9a9710) SHA1(a9f67a05a2882b9f6f3378cc73e90539de4b8ca4) )
+ ROM_LOAD( "db1a.pr1", 0x1000, 0x1000, CRC(4cb964cd) SHA1(1c90b14deb201a64b8ed4378b022e9e4574aed94) )
+ ROM_LOAD( "db4a.pr3", 0x2000, 0x1000, CRC(d9d2df33) SHA1(97057fe33c146898755b556558ff707b9f4551ec) )
+ ROM_LOAD( "db2a.pr2", 0x3000, 0x1000, CRC(0a0a6af5) SHA1(ecd2a6696ce9154f030c830ccb45690787881a73) )
+
+ ROM_REGION( 0x0020, "proms", 0 )
+ ROM_LOAD( "mi-7603-5.ic4", 0x0000, 0x0020, CRC(f131f92f) SHA1(8b0f623d2ea09b5612dde0f330c5e473a7d72e06) ) /* near DB5 - DB8 */
+
+ ROM_REGION( 0x0020, "unk_prom", 0 ) //timing?
+ ROM_LOAD( "mi-7603-5.ic3", 0x0000, 0x0020, CRC(e2a54c47) SHA1(1e08f8e3d0ae0efb2d178ab11ec2bddaeb6d7478) ) /* near DB1 - DB4 */
+ROM_END
+
+
+ROM_START( dambustra )
+ ROM_REGION( 0x10000, "maincpu", 0 )
+ ROM_LOAD( "db8a.pr8", 0x4000, 0x1000, CRC(fd041ff4) SHA1(8d27da7bf0c655633711b960cbc23950c8a371ae) )
+ ROM_LOAD( "db6.pr6", 0x5000, 0x1000, CRC(56d301a9) SHA1(a0839767af822ab1b8df1a7d0767e72b494974c6) ) /* This single rom had a yellow label, while all the rest were white */
+ ROM_LOAD( "db7a.pr7", 0x6000, 0x1000, CRC(675b1f5e) SHA1(6a386212a640fb467b6956a4dc5a68476af1cf97) )
+ ROM_LOAD( "db5a.pr5", 0x7000, 0x1000, CRC(75659ecc) SHA1(b61254fb12f3999607abd88d1cc649dcfbf0384c) )
+
+ ROM_REGION( 0x10000,"user1",0)
+ ROM_LOAD( "db11.pr11", 0x0000, 0x1000, CRC(427bd3fb) SHA1(cdbaef4040fa2e0598a086e320d51ecb26a591dd) )
+ ROM_LOAD( "db9a.pr9", 0x1000, 0x1000, CRC(57164563) SHA1(8471d0660f39511d0afa3cdd63a1e84b0ea80fd0) )
+ ROM_LOAD( "db10a.pr10", 0x2000, 0x1000, CRC(075b9c5e) SHA1(ff6ce873897004c0e796813725e260df85a520f9) ) /* Had a hand drawn "PLUS" symbol on the rom label */
+ ROM_LOAD( "db12a.pr12", 0x3000, 0x1000, CRC(ed01a68b) SHA1(9dd37c2a25865717a7acdd7e2a3bef26a4cef3d9) )
+
+ ROM_REGION( 0x4000, "gfx1", 0 )
+ ROM_LOAD( "db3a.rom", 0x0000, 0x1000, CRC(2347e26e) SHA1(85909c6cca7a5249d28668291a28e24d5b90293b) ) /* All roms, except for 6 & 11, had a hand drawn "A" on the label */
+ ROM_LOAD( "db1a.pr1", 0x1000, 0x1000, CRC(4cb964cd) SHA1(1c90b14deb201a64b8ed4378b022e9e4574aed94) )
+ ROM_LOAD( "db4a.pr3", 0x2000, 0x1000, CRC(d9d2df33) SHA1(97057fe33c146898755b556558ff707b9f4551ec) )
+ ROM_LOAD( "db2a.pr2", 0x3000, 0x1000, CRC(0a0a6af5) SHA1(ecd2a6696ce9154f030c830ccb45690787881a73) )
+
+ ROM_REGION( 0x0020, "proms", 0 )
+ ROM_LOAD( "mi-7603-5.ic4", 0x0000, 0x0020, CRC(f131f92f) SHA1(8b0f623d2ea09b5612dde0f330c5e473a7d72e06) ) /* near DB5 - DB8 */
+
+ ROM_REGION( 0x0020, "unk_prom", 0 ) //timing?
+ ROM_LOAD( "mi-7603-5.ic3", 0x0000, 0x0020, CRC(e2a54c47) SHA1(1e08f8e3d0ae0efb2d178ab11ec2bddaeb6d7478) ) /* near DB1 - DB4 */
+ROM_END
+
+
+ROM_START( dambustruk )
+ ROM_REGION( 0x10000, "maincpu", 0 )
+ ROM_LOAD( "db8.pr8", 0x4000, 0x1000, CRC(fd041ff4) SHA1(8d27da7bf0c655633711b960cbc23950c8a371ae) )
+ ROM_LOAD( "db6p.bin", 0x5000, 0x1000, CRC(35dcee01) SHA1(2c23c727d9b38322a6d0548dfe6a2a254f3530af) )
+ ROM_LOAD( "db7.pr7", 0x6000, 0x1000, CRC(675b1f5e) SHA1(6a386212a640fb467b6956a4dc5a68476af1cf97) )
+ ROM_LOAD( "db5.pr5", 0x7000, 0x1000, CRC(75659ecc) SHA1(b61254fb12f3999607abd88d1cc649dcfbf0384c) )
+
+ ROM_REGION( 0x10000,"user1",0)
+ ROM_LOAD( "db11.bin", 0x0000, 0x1000, CRC(9e6b34fe) SHA1(5cf47f5a5280ac53490240df220edf6178e87f4f) )
+ ROM_LOAD( "db9.pr9", 0x1000, 0x1000, CRC(57164563) SHA1(8471d0660f39511d0afa3cdd63a1e84b0ea80fd0) )
+ ROM_LOAD( "db10p.bin", 0x2000, 0x1000, CRC(c129c57b) SHA1(c25abd7ee97b71941d9fa6acd0d92c116f1ff408) )
+ ROM_LOAD( "db12.bin", 0x3000, 0x1000, CRC(ea4c65f5) SHA1(cb761e0543cacd6b437c6e88615f97df83245a34) )
+
+ ROM_REGION( 0x4000, "gfx1", 0 )
+ ROM_LOAD( "db3.pr3", 0x0000, 0x1000, CRC(9e9a9710) SHA1(a9f67a05a2882b9f6f3378cc73e90539de4b8ca4) )
+ ROM_LOAD( "db1ap.pr1", 0x1000, 0x1000, CRC(4cb964cd) SHA1(1c90b14deb201a64b8ed4378b022e9e4574aed94) )
+ ROM_LOAD( "db4.pr3", 0x2000, 0x1000, CRC(d9d2df33) SHA1(97057fe33c146898755b556558ff707b9f4551ec) )
+ ROM_LOAD( "db2.pr2", 0x3000, 0x1000, CRC(0a0a6af5) SHA1(ecd2a6696ce9154f030c830ccb45690787881a73) )
+
+ ROM_REGION( 0x0020, "proms", 0 )
+ ROM_LOAD( "mi-7603-5.ic4", 0x0000, 0x0020, CRC(f131f92f) SHA1(8b0f623d2ea09b5612dde0f330c5e473a7d72e06) ) /* near DB5 - DB8 */
+
+ ROM_REGION( 0x0020, "unk_prom", 0 ) //timing?
+ ROM_LOAD( "mi-7603-5.ic3", 0x0000, 0x0020, CRC(e2a54c47) SHA1(1e08f8e3d0ae0efb2d178ab11ec2bddaeb6d7478) ) /* near DB1 - DB4 */
+ROM_END
+
+
+GAME( 1981, dambustr, 0, dambustr, dambustr, dambustr, ROT90, "South West Research", "Dambusters (US, set 1)", 0 )
+GAME( 1981, dambustra, dambustr, dambustr, dambustr, dambustr, ROT90, "South West Research", "Dambusters (US, set 2)", 0 )
+GAME( 1981, dambustruk, dambustr, dambustr, dambustruk, dambustr, ROT90, "South West Research", "Dambusters (UK)", 0 )