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Diffstat (limited to 'trunk/src/mame/drivers/1942.c')
-rw-r--r--trunk/src/mame/drivers/1942.c517
1 files changed, 517 insertions, 0 deletions
diff --git a/trunk/src/mame/drivers/1942.c b/trunk/src/mame/drivers/1942.c
new file mode 100644
index 00000000000..0a5a3053f38
--- /dev/null
+++ b/trunk/src/mame/drivers/1942.c
@@ -0,0 +1,517 @@
+/***************************************************************************
+
+1942
+
+driver by Paul Leaman
+
+
+MAIN CPU:
+
+0000-bfff ROM (8000-bfff banked)
+cc00-cc7f Sprites
+d000-d3ff Video RAM
+d400-d7ff Color RAM
+d800-dbff Background RAM (groups of 32 bytes, 16 code, 16 color/attribute)
+e000-efff RAM
+
+read:
+c000 IN0
+c001 IN1
+c002 IN2
+c003 DSW0
+c004 DSW1
+
+write:
+c800 command for the audio CPU
+c802-c803 background scroll
+c804 bit 7: flip screen
+ bit 4: cpu B reset
+ bit 0: coin counter
+c805 background palette bank selector
+c806 bit 0-1 ROM bank selector 00=1-N5.BIN
+ 01=1-N6.BIN
+ 10=1-N7.BIN
+
+
+
+SOUND CPU:
+
+0000-3fff ROM
+4000-47ff RAM
+6000 command from the main CPU
+8000 8910 #1 control
+8001 8910 #1 write
+c000 8910 #2 control
+c001 8910 #2 write
+
+
+
+Game runs in interrupt mode 0 (the devices supply the interrupt number).
+
+Two interrupts must be triggered per refresh for the game to function
+correctly.
+
+0x10 is the video retrace. This controls the speed of the game and generally
+ drives the code. This must be triggerd for each video retrace.
+0x08 is the sound card service interrupt. The game uses this to throw sounds
+ at the sound CPU.
+
+
+***************************************************************************/
+
+#define MAIN_CPU_CLOCK (XTAL_12MHz/3) /* 12MHz is the only OSC on the PCB */
+#define SOUND_CPU_CLOCK (XTAL_12MHz/4) /* 12MHz is the only OSC on the PCB */
+#define AUDIO_CLOCK (XTAL_12MHz/8) /* 12MHz is the only OSC on the PCB */
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "sound/ay8910.h"
+#include "includes/1942.h"
+
+
+WRITE8_MEMBER(_1942_state::c1942_bankswitch_w)
+{
+ membank("bank1")->set_entry(data & 0x03);
+}
+
+static TIMER_DEVICE_CALLBACK( c1942_scanline )
+{
+ int scanline = param;
+
+ if(scanline == 240) // vblank-out irq
+ cputag_set_input_line_and_vector(timer.machine(), "maincpu", 0, HOLD_LINE, 0xd7); /* RST 10h - vblank */
+
+ if(scanline == 0) // unknown irq event, presumably vblank-in or a periodic one (writes to the soundlatch and drives freeze dip-switch)
+ cputag_set_input_line_and_vector(timer.machine(), "maincpu", 0, HOLD_LINE, 0xcf); /* RST 08h */
+}
+
+
+static ADDRESS_MAP_START( c1942_map, AS_PROGRAM, 8, _1942_state )
+ AM_RANGE(0x0000, 0x7fff) AM_ROM
+ AM_RANGE(0x8000, 0xbfff) AM_ROMBANK("bank1")
+ AM_RANGE(0xc000, 0xc000) AM_READ_PORT("SYSTEM")
+ AM_RANGE(0xc001, 0xc001) AM_READ_PORT("P1")
+ AM_RANGE(0xc002, 0xc002) AM_READ_PORT("P2")
+ AM_RANGE(0xc003, 0xc003) AM_READ_PORT("DSWA")
+ AM_RANGE(0xc004, 0xc004) AM_READ_PORT("DSWB")
+ AM_RANGE(0xc800, 0xc800) AM_WRITE(soundlatch_byte_w)
+ AM_RANGE(0xc802, 0xc803) AM_WRITE(c1942_scroll_w)
+ AM_RANGE(0xc804, 0xc804) AM_WRITE(c1942_c804_w)
+ AM_RANGE(0xc805, 0xc805) AM_WRITE(c1942_palette_bank_w)
+ AM_RANGE(0xc806, 0xc806) AM_WRITE(c1942_bankswitch_w)
+ AM_RANGE(0xcc00, 0xcc7f) AM_RAM AM_SHARE("spriteram")
+ AM_RANGE(0xd000, 0xd7ff) AM_RAM_WRITE(c1942_fgvideoram_w) AM_SHARE("fg_videoram")
+ AM_RANGE(0xd800, 0xdbff) AM_RAM_WRITE(c1942_bgvideoram_w) AM_SHARE("bg_videoram")
+ AM_RANGE(0xe000, 0xefff) AM_RAM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( sound_map, AS_PROGRAM, 8, _1942_state )
+ AM_RANGE(0x0000, 0x3fff) AM_ROM
+ AM_RANGE(0x4000, 0x47ff) AM_RAM
+ AM_RANGE(0x6000, 0x6000) AM_READ(soundlatch_byte_r)
+ AM_RANGE(0x8000, 0x8001) AM_DEVWRITE_LEGACY("ay1", ay8910_address_data_w)
+ AM_RANGE(0xc000, 0xc001) AM_DEVWRITE_LEGACY("ay2", ay8910_address_data_w)
+ADDRESS_MAP_END
+
+
+static INPUT_PORTS_START( 1942 )
+ PORT_START("SYSTEM")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START1 )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START2 )
+ PORT_BIT( 0x0c, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_SERVICE1 )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN2 )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN1 )
+
+ PORT_START("P1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
+ PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("P2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_COCKTAIL
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_COCKTAIL
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_COCKTAIL
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_COCKTAIL
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_COCKTAIL
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_COCKTAIL
+ PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("DSWA")
+ PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SWA:8,7,6")
+ PORT_DIPSETTING( 0x01, DEF_STR( 4C_1C ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( 3C_1C ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x07, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x03, DEF_STR( 2C_3C ) )
+ PORT_DIPSETTING( 0x06, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0x05, DEF_STR( 1C_4C ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Free_Play ) )
+ PORT_DIPNAME( 0x08, 0x00, DEF_STR( Cabinet ) ) PORT_DIPLOCATION("SWA:5")
+ PORT_DIPSETTING( 0x00, DEF_STR( Upright ) )
+ PORT_DIPSETTING( 0x08, DEF_STR( Cocktail ) )
+ PORT_DIPNAME( 0x30, 0x30, DEF_STR( Bonus_Life ) ) PORT_DIPLOCATION("SWA:4,3")
+ PORT_DIPSETTING( 0x30, "20K 80K 80K+" )
+ PORT_DIPSETTING( 0x20, "20K 100K 100K+" )
+ PORT_DIPSETTING( 0x10, "30K 80K 80K+" )
+ PORT_DIPSETTING( 0x00, "30K 100K 100K+" )
+ PORT_DIPNAME( 0xc0, 0x40, DEF_STR( Lives ) ) PORT_DIPLOCATION("SWA:2,1")
+ PORT_DIPSETTING( 0x80, "1" )
+ PORT_DIPSETTING( 0x40, "2" )
+ PORT_DIPSETTING( 0xc0, "3" )
+ PORT_DIPSETTING( 0x00, "5" )
+
+ PORT_START("DSWB")
+ PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SWB:8,7,6")
+ PORT_DIPSETTING( 0x01, DEF_STR( 4C_1C ) )
+ PORT_DIPSETTING( 0x02, DEF_STR( 3C_1C ) )
+ PORT_DIPSETTING( 0x04, DEF_STR( 2C_1C ) )
+ PORT_DIPSETTING( 0x07, DEF_STR( 1C_1C ) )
+ PORT_DIPSETTING( 0x03, DEF_STR( 2C_3C ) )
+ PORT_DIPSETTING( 0x06, DEF_STR( 1C_2C ) )
+ PORT_DIPSETTING( 0x05, DEF_STR( 1C_4C ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Free_Play ) )
+ PORT_SERVICE_DIPLOC(0x08, IP_ACTIVE_LOW, "SWB:5" )
+ PORT_DIPNAME( 0x10, 0x10, DEF_STR( Flip_Screen ) ) PORT_DIPLOCATION("SWB:4")
+ PORT_DIPSETTING( 0x10, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+ PORT_DIPNAME( 0x60, 0x60, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SWB:3,2")
+ PORT_DIPSETTING( 0x40, DEF_STR( Easy ) )
+ PORT_DIPSETTING( 0x60, DEF_STR( Normal ) )
+ PORT_DIPSETTING( 0x20, DEF_STR( Difficult ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( Very_Difficult ) )
+ PORT_DIPNAME( 0x80, 0x80, "Screen Stop" ) PORT_DIPLOCATION("SWB:1")
+ PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
+ PORT_DIPSETTING( 0x00, DEF_STR( On ) )
+INPUT_PORTS_END
+
+
+
+static const gfx_layout charlayout =
+{
+ 8,8,
+ RGN_FRAC(1,1),
+ 2,
+ { 4, 0 },
+ { 0, 1, 2, 3, 8+0, 8+1, 8+2, 8+3 },
+ { 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
+ 16*8
+};
+
+static const gfx_layout tilelayout =
+{
+ 16,16,
+ RGN_FRAC(1,3),
+ 3,
+ { RGN_FRAC(0,3), RGN_FRAC(1,3), RGN_FRAC(2,3) },
+ { 0, 1, 2, 3, 4, 5, 6, 7,
+ 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*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
+};
+
+static const gfx_layout spritelayout =
+{
+ 16,16,
+ RGN_FRAC(1,2),
+ 4,
+ { RGN_FRAC(1,2)+4, RGN_FRAC(1,2)+0, 4, 0 },
+ { 0, 1, 2, 3, 8+0, 8+1, 8+2, 8+3,
+ 16*16+0, 16*16+1, 16*16+2, 16*16+3, 16*16+8+0, 16*16+8+1, 16*16+8+2, 16*16+8+3 },
+ { 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 },
+ 64*8
+};
+
+static GFXDECODE_START( 1942 )
+ GFXDECODE_ENTRY( "gfx1", 0, charlayout, 0, 64 )
+ GFXDECODE_ENTRY( "gfx2", 0, tilelayout, 64*4, 4*32 )
+ GFXDECODE_ENTRY( "gfx3", 0, spritelayout, 64*4+4*32*8, 16 )
+GFXDECODE_END
+
+
+static MACHINE_START( 1942 )
+{
+ _1942_state *state = machine.driver_data<_1942_state>();
+
+ state->m_audiocpu = machine.device("audiocpu");
+
+ state->save_item(NAME(state->m_palette_bank));
+ state->save_item(NAME(state->m_scroll));
+}
+
+static MACHINE_RESET( 1942 )
+{
+ _1942_state *state = machine.driver_data<_1942_state>();
+
+ state->m_palette_bank = 0;
+ state->m_scroll[0] = 0;
+ state->m_scroll[1] = 0;
+}
+
+static MACHINE_CONFIG_START( 1942, _1942_state )
+
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", Z80, MAIN_CPU_CLOCK) /* 4 MHz ??? */
+ MCFG_CPU_PROGRAM_MAP(c1942_map)
+ MCFG_TIMER_ADD_SCANLINE("scantimer", c1942_scanline, "screen", 0, 1)
+
+ MCFG_CPU_ADD("audiocpu", Z80, SOUND_CPU_CLOCK) /* 3 MHz ??? */
+ MCFG_CPU_PROGRAM_MAP(sound_map)
+ MCFG_CPU_PERIODIC_INT(irq0_line_hold,4*60)
+
+ MCFG_MACHINE_START(1942)
+ MCFG_MACHINE_RESET(1942)
+
+ /* video hardware */
+ MCFG_GFXDECODE(1942)
+ MCFG_PALETTE_LENGTH(64*4+4*32*8+16*16)
+
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(60)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
+ MCFG_SCREEN_SIZE(32*8, 32*8)
+ MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
+ MCFG_SCREEN_UPDATE_STATIC(1942)
+
+ MCFG_PALETTE_INIT(1942)
+ MCFG_VIDEO_START(1942)
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD("ay1", AY8910, AUDIO_CLOCK) /* 1.5 MHz */
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+ MCFG_SOUND_ADD("ay2", AY8910, AUDIO_CLOCK) /* 1.5 MHz */
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+MACHINE_CONFIG_END
+
+
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+ROM_START( 1942 )
+ ROM_REGION( 0x1c000, "maincpu", 0 ) /* 64k for code + 3*16k for the banked ROMs images */
+ ROM_LOAD( "srb-03.m3", 0x00000, 0x4000, CRC(d9dafcc3) SHA1(a089a9bc55fb7d6d0ac53f91b258396d5d62677a) )
+ ROM_LOAD( "srb-04.m4", 0x04000, 0x4000, CRC(da0cf924) SHA1(856fbb302c9a4ec7850a26ab23dab8467f79bba4) )
+ ROM_LOAD( "srb-05.m5", 0x10000, 0x4000, CRC(d102911c) SHA1(35ba1d82bd901940f61d8619273463d02fc0a952) )
+ ROM_LOAD( "srb-06.m6", 0x14000, 0x2000, CRC(466f8248) SHA1(2ccc8fc59962d3001fbc10e8d2f20a254a74f251) )
+ ROM_LOAD( "srb-07.m7", 0x18000, 0x4000, CRC(0d31038c) SHA1(b588eaf6fddd66ecb2d9832dc197f286f1ccd846) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "sr-01.c11", 0x0000, 0x4000, CRC(bd87f06b) SHA1(821f85cf157f81117eeaba0c3cf0337eac357e58) )
+
+ ROM_REGION( 0x2000, "gfx1", 0 )
+ ROM_LOAD( "sr-02.f2", 0x0000, 0x2000, CRC(6ebca191) SHA1(0dbddadde54a0ab66994c4a8726be05c6ca88a0e) ) /* characters */
+
+ ROM_REGION( 0xc000, "gfx2", 0 )
+ ROM_LOAD( "sr-08.a1", 0x0000, 0x2000, CRC(3884d9eb) SHA1(5cbd9215fa5ba5a61208b383700adc4428521aed) ) /* tiles */
+ ROM_LOAD( "sr-09.a2", 0x2000, 0x2000, CRC(999cf6e0) SHA1(5b8b685038ec98b781908b92eb7fb9506db68544) )
+ ROM_LOAD( "sr-10.a3", 0x4000, 0x2000, CRC(8edb273a) SHA1(85fdd4c690ed31e6396e3c16aa02140ee7ea2d61) )
+ ROM_LOAD( "sr-11.a4", 0x6000, 0x2000, CRC(3a2726c3) SHA1(187c92ef591febdcbd1d42ab850e0cbb62c00873) )
+ ROM_LOAD( "sr-12.a5", 0x8000, 0x2000, CRC(1bd3d8bb) SHA1(ef4dce605eb4dc8035985a415315ec61c21419c6) )
+ ROM_LOAD( "sr-13.a6", 0xa000, 0x2000, CRC(658f02c4) SHA1(f087d69e49e38cf3107350cde18fcf85a8fa04f0) )
+
+ ROM_REGION( 0x10000, "gfx3", 0 )
+ ROM_LOAD( "sr-14.l1", 0x00000, 0x4000, CRC(2528bec6) SHA1(29f7719f18faad6bd1ec6735cc24e69168361470) ) /* sprites */
+ ROM_LOAD( "sr-15.l2", 0x04000, 0x4000, CRC(f89287aa) SHA1(136fff6d2a4f48a488fc7c620213761459c3ada0) )
+ ROM_LOAD( "sr-16.n1", 0x08000, 0x4000, CRC(024418f8) SHA1(145b8d5d6c8654cd090955a98f6dd8c8dbafe7c1) )
+ ROM_LOAD( "sr-17.n2", 0x0c000, 0x4000, CRC(e2c7e489) SHA1(d4b5d575c021f58f6966df189df94e08c5b3621c) )
+
+ ROM_REGION( 0x0a00, "proms", 0 )
+ ROM_LOAD( "sb-5.e8", 0x0000, 0x0100, CRC(93ab8153) SHA1(a792f24e5c0c3c4a6b436102e7a98199f878ece1) ) /* red component */
+ ROM_LOAD( "sb-6.e9", 0x0100, 0x0100, CRC(8ab44f7d) SHA1(f74680a6a987d74b3acb32e6396f20e127874149) ) /* green component */
+ ROM_LOAD( "sb-7.e10", 0x0200, 0x0100, CRC(f4ade9a4) SHA1(62ad31d31d183cce213b03168daa035083b2f28e) ) /* blue component */
+ ROM_LOAD( "sb-0.f1", 0x0300, 0x0100, CRC(6047d91b) SHA1(1ce025f9524c1033e48c5294ee7d360f8bfebe8d) ) /* char lookup table */
+ ROM_LOAD( "sb-4.d6", 0x0400, 0x0100, CRC(4858968d) SHA1(20b5dbcaa1a4081b3139e7e2332d8fe3c9e55ed6) ) /* tile lookup table */
+ ROM_LOAD( "sb-8.k3", 0x0500, 0x0100, CRC(f6fad943) SHA1(b0a24ea7805272e8ebf72a99b08907bc00d5f82f) ) /* sprite lookup table */
+ ROM_LOAD( "sb-2.d1", 0x0600, 0x0100, CRC(8bb8b3df) SHA1(49de2819c4c92057fedcb20425282515d85829aa) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-3.d2", 0x0700, 0x0100, CRC(3b0c99af) SHA1(38f30ac1e48632634e409f328ee3051b987de7ad) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-1.k6", 0x0800, 0x0100, CRC(712ac508) SHA1(5349d722ab6733afdda65f6e0a98322f0d515e86) ) /* interrupt timing (not used) */
+ ROM_LOAD( "sb-9.m11", 0x0900, 0x0100, CRC(4921635c) SHA1(aee37d6cdc36acf0f11ff5f93e7b16e4b12f6c39) ) /* video timing? (not used) */
+ROM_END
+
+ROM_START( 1942a )
+ ROM_REGION( 0x1c000, "maincpu", 0 ) /* 64k for code + 3*16k for the banked ROMs images */
+ ROM_LOAD( "sra-03.m3", 0x00000, 0x4000, CRC(40201bab) SHA1(4886c07a4602223c21419118e10aadce9c99fa5a) )
+ ROM_LOAD( "sr-04.m4", 0x04000, 0x4000, CRC(a60ac644) SHA1(f37862db3cf5e6cc9ab3276f3bc45fd629fd70dd) )
+ ROM_LOAD( "sr-05.m5", 0x10000, 0x4000, CRC(835f7b24) SHA1(24b66827f08c43fbf5b9517d638acdfc38e1b1e7) )
+ ROM_LOAD( "sr-06.m6", 0x14000, 0x2000, CRC(821c6481) SHA1(06becb6bf8b4bde3a458098498eecad566a87711) )
+ ROM_LOAD( "sr-07.m7", 0x18000, 0x4000, CRC(5df525e1) SHA1(70cd2910e2945db76bd6ebfa0ff09a5efadc2d0b) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "sr-01.c11", 0x0000, 0x4000, CRC(bd87f06b) SHA1(821f85cf157f81117eeaba0c3cf0337eac357e58) )
+
+ ROM_REGION( 0x2000, "gfx1", 0 )
+ ROM_LOAD( "sr-02.f2", 0x0000, 0x2000, CRC(6ebca191) SHA1(0dbddadde54a0ab66994c4a8726be05c6ca88a0e) ) /* characters */
+
+ ROM_REGION( 0xc000, "gfx2", 0 )
+ ROM_LOAD( "sr-08.a1", 0x0000, 0x2000, CRC(3884d9eb) SHA1(5cbd9215fa5ba5a61208b383700adc4428521aed) ) /* tiles */
+ ROM_LOAD( "sr-09.a2", 0x2000, 0x2000, CRC(999cf6e0) SHA1(5b8b685038ec98b781908b92eb7fb9506db68544) )
+ ROM_LOAD( "sr-10.a3", 0x4000, 0x2000, CRC(8edb273a) SHA1(85fdd4c690ed31e6396e3c16aa02140ee7ea2d61) )
+ ROM_LOAD( "sr-11.a4", 0x6000, 0x2000, CRC(3a2726c3) SHA1(187c92ef591febdcbd1d42ab850e0cbb62c00873) )
+ ROM_LOAD( "sr-12.a5", 0x8000, 0x2000, CRC(1bd3d8bb) SHA1(ef4dce605eb4dc8035985a415315ec61c21419c6) )
+ ROM_LOAD( "sr-13.a6", 0xa000, 0x2000, CRC(658f02c4) SHA1(f087d69e49e38cf3107350cde18fcf85a8fa04f0) )
+
+ ROM_REGION( 0x10000, "gfx3", 0 )
+ ROM_LOAD( "sr-14.l1", 0x00000, 0x4000, CRC(2528bec6) SHA1(29f7719f18faad6bd1ec6735cc24e69168361470) ) /* sprites */
+ ROM_LOAD( "sr-15.l2", 0x04000, 0x4000, CRC(f89287aa) SHA1(136fff6d2a4f48a488fc7c620213761459c3ada0) )
+ ROM_LOAD( "sr-16.n1", 0x08000, 0x4000, CRC(024418f8) SHA1(145b8d5d6c8654cd090955a98f6dd8c8dbafe7c1) )
+ ROM_LOAD( "sr-17.n2", 0x0c000, 0x4000, CRC(e2c7e489) SHA1(d4b5d575c021f58f6966df189df94e08c5b3621c) )
+
+ ROM_REGION( 0x0a00, "proms", 0 )
+ ROM_LOAD( "sb-5.e8", 0x0000, 0x0100, CRC(93ab8153) SHA1(a792f24e5c0c3c4a6b436102e7a98199f878ece1) ) /* red component */
+ ROM_LOAD( "sb-6.e9", 0x0100, 0x0100, CRC(8ab44f7d) SHA1(f74680a6a987d74b3acb32e6396f20e127874149) ) /* green component */
+ ROM_LOAD( "sb-7.e10", 0x0200, 0x0100, CRC(f4ade9a4) SHA1(62ad31d31d183cce213b03168daa035083b2f28e) ) /* blue component */
+ ROM_LOAD( "sb-0.f1", 0x0300, 0x0100, CRC(6047d91b) SHA1(1ce025f9524c1033e48c5294ee7d360f8bfebe8d) ) /* char lookup table */
+ ROM_LOAD( "sb-4.d6", 0x0400, 0x0100, CRC(4858968d) SHA1(20b5dbcaa1a4081b3139e7e2332d8fe3c9e55ed6) ) /* tile lookup table */
+ ROM_LOAD( "sb-8.k3", 0x0500, 0x0100, CRC(f6fad943) SHA1(b0a24ea7805272e8ebf72a99b08907bc00d5f82f) ) /* sprite lookup table */
+ ROM_LOAD( "sb-2.d1", 0x0600, 0x0100, CRC(8bb8b3df) SHA1(49de2819c4c92057fedcb20425282515d85829aa) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-3.d2", 0x0700, 0x0100, CRC(3b0c99af) SHA1(38f30ac1e48632634e409f328ee3051b987de7ad) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-1.k6", 0x0800, 0x0100, CRC(712ac508) SHA1(5349d722ab6733afdda65f6e0a98322f0d515e86) ) /* interrupt timing (not used) */
+ ROM_LOAD( "sb-9.m11", 0x0900, 0x0100, CRC(4921635c) SHA1(aee37d6cdc36acf0f11ff5f93e7b16e4b12f6c39) ) /* video timing? (not used) */
+ROM_END
+
+/* this is the same as the 1942a set, but with a different rom arrangement (larger roms), it appears to be a common bootleg */
+ROM_START( 1942abl )
+ ROM_REGION( 0x1c000, "maincpu", 0 ) /* 64k for code + 3*16k for the banked ROMs images */
+ ROM_LOAD( "3.bin", 0x00000, 0x8000, CRC(f3184f5a) SHA1(a566c344ee1f63580d41aca95ece9ad1f7a135d2) )
+ ROM_LOAD( "5.bin", 0x10000, 0x4000, CRC(835f7b24) SHA1(24b66827f08c43fbf5b9517d638acdfc38e1b1e7) )
+ ROM_LOAD( "7.bin", 0x14000, 0x8000, CRC(2f456c6e) SHA1(b728c72f97ccdb57a4aac53ef7ca3f4516fc2ecb) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "1.bin", 0x0000, 0x4000, CRC(bd87f06b) SHA1(821f85cf157f81117eeaba0c3cf0337eac357e58) )
+
+ ROM_REGION( 0x2000, "gfx1", 0 )
+ ROM_LOAD( "2.bin", 0x0000, 0x2000, CRC(6ebca191) SHA1(0dbddadde54a0ab66994c4a8726be05c6ca88a0e) ) /* characters */
+
+ ROM_REGION( 0xc000, "gfx2", 0 )
+ ROM_LOAD( "9.bin", 0x0000, 0x4000, CRC(60329fa4) SHA1(8f66c283c992a6bc676f5f0f739b7e9d07bbf9ee) ) /* tiles */
+ ROM_LOAD( "11.bin", 0x4000, 0x4000, CRC(66bac116) SHA1(ce21a693ad8d7592d21e05d0cb9eabb36e7e8fef) )
+ ROM_LOAD( "13.bin", 0x8000, 0x4000, CRC(623fcec1) SHA1(b3eea37d705e3871dc94e4cf6f2aacc6fbd09216) )
+
+ ROM_REGION( 0x10000, "gfx3", 0 )
+ ROM_LOAD( "14.bin", 0x04000, 0x4000, CRC(df2345ef) SHA1(3776edebda7bc9c72117f4b764f3bdaec0a632b4) ) /* sprites */
+ ROM_CONTINUE(0x0000,0x4000)
+ ROM_LOAD( "16.bin", 0x0c000, 0x4000, CRC(c106b1ed) SHA1(a16520752fb02e403c93975ecf12b75854d58d69) )
+ ROM_CONTINUE(0x8000,0x4000)
+
+ // proms not in the set, assumed to be the same
+ ROM_REGION( 0x0a00, "proms", 0 )
+ ROM_LOAD( "sb-5.e8", 0x0000, 0x0100, CRC(93ab8153) SHA1(a792f24e5c0c3c4a6b436102e7a98199f878ece1) ) /* red component */
+ ROM_LOAD( "sb-6.e9", 0x0100, 0x0100, CRC(8ab44f7d) SHA1(f74680a6a987d74b3acb32e6396f20e127874149) ) /* green component */
+ ROM_LOAD( "sb-7.e10", 0x0200, 0x0100, CRC(f4ade9a4) SHA1(62ad31d31d183cce213b03168daa035083b2f28e) ) /* blue component */
+ ROM_LOAD( "sb-0.f1", 0x0300, 0x0100, CRC(6047d91b) SHA1(1ce025f9524c1033e48c5294ee7d360f8bfebe8d) ) /* char lookup table */
+ ROM_LOAD( "sb-4.d6", 0x0400, 0x0100, CRC(4858968d) SHA1(20b5dbcaa1a4081b3139e7e2332d8fe3c9e55ed6) ) /* tile lookup table */
+ ROM_LOAD( "sb-8.k3", 0x0500, 0x0100, CRC(f6fad943) SHA1(b0a24ea7805272e8ebf72a99b08907bc00d5f82f) ) /* sprite lookup table */
+ ROM_LOAD( "sb-2.d1", 0x0600, 0x0100, CRC(8bb8b3df) SHA1(49de2819c4c92057fedcb20425282515d85829aa) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-3.d2", 0x0700, 0x0100, CRC(3b0c99af) SHA1(38f30ac1e48632634e409f328ee3051b987de7ad) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-1.k6", 0x0800, 0x0100, CRC(712ac508) SHA1(5349d722ab6733afdda65f6e0a98322f0d515e86) ) /* interrupt timing (not used) */
+ ROM_LOAD( "sb-9.m11", 0x0900, 0x0100, CRC(4921635c) SHA1(aee37d6cdc36acf0f11ff5f93e7b16e4b12f6c39) ) /* video timing? (not used) */
+ROM_END
+
+ROM_START( 1942b )
+ ROM_REGION( 0x1c000, "maincpu", 0 ) /* 64k for code + 3*16k for the banked ROMs images */
+ ROM_LOAD( "sr-03.m3", 0x00000, 0x4000, CRC(612975f2) SHA1(f3744335862dd4c53925cc32792badd4a378c837) )
+ ROM_LOAD( "sr-04.m4", 0x04000, 0x4000, CRC(a60ac644) SHA1(f37862db3cf5e6cc9ab3276f3bc45fd629fd70dd) )
+ ROM_LOAD( "sr-05.m5", 0x10000, 0x4000, CRC(835f7b24) SHA1(24b66827f08c43fbf5b9517d638acdfc38e1b1e7) )
+ ROM_LOAD( "sr-06.m6", 0x14000, 0x2000, CRC(821c6481) SHA1(06becb6bf8b4bde3a458098498eecad566a87711) )
+ ROM_LOAD( "sr-07.m7", 0x18000, 0x4000, CRC(5df525e1) SHA1(70cd2910e2945db76bd6ebfa0ff09a5efadc2d0b) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "sr-01.c11", 0x0000, 0x4000, CRC(bd87f06b) SHA1(821f85cf157f81117eeaba0c3cf0337eac357e58) )
+
+ ROM_REGION( 0x2000, "gfx1", 0 )
+ ROM_LOAD( "sr-02.f2", 0x0000, 0x2000, CRC(6ebca191) SHA1(0dbddadde54a0ab66994c4a8726be05c6ca88a0e) ) /* characters */
+
+ ROM_REGION( 0xc000, "gfx2", 0 )
+ ROM_LOAD( "sr-08.a1", 0x0000, 0x2000, CRC(3884d9eb) SHA1(5cbd9215fa5ba5a61208b383700adc4428521aed) ) /* tiles */
+ ROM_LOAD( "sr-09.a2", 0x2000, 0x2000, CRC(999cf6e0) SHA1(5b8b685038ec98b781908b92eb7fb9506db68544) )
+ ROM_LOAD( "sr-10.a3", 0x4000, 0x2000, CRC(8edb273a) SHA1(85fdd4c690ed31e6396e3c16aa02140ee7ea2d61) )
+ ROM_LOAD( "sr-11.a4", 0x6000, 0x2000, CRC(3a2726c3) SHA1(187c92ef591febdcbd1d42ab850e0cbb62c00873) )
+ ROM_LOAD( "sr-12.a5", 0x8000, 0x2000, CRC(1bd3d8bb) SHA1(ef4dce605eb4dc8035985a415315ec61c21419c6) )
+ ROM_LOAD( "sr-13.a6", 0xa000, 0x2000, CRC(658f02c4) SHA1(f087d69e49e38cf3107350cde18fcf85a8fa04f0) )
+
+ ROM_REGION( 0x10000, "gfx3", 0 )
+ ROM_LOAD( "sr-14.l1", 0x00000, 0x4000, CRC(2528bec6) SHA1(29f7719f18faad6bd1ec6735cc24e69168361470) ) /* sprites */
+ ROM_LOAD( "sr-15.l2", 0x04000, 0x4000, CRC(f89287aa) SHA1(136fff6d2a4f48a488fc7c620213761459c3ada0) )
+ ROM_LOAD( "sr-16.n1", 0x08000, 0x4000, CRC(024418f8) SHA1(145b8d5d6c8654cd090955a98f6dd8c8dbafe7c1) )
+ ROM_LOAD( "sr-17.n2", 0x0c000, 0x4000, CRC(e2c7e489) SHA1(d4b5d575c021f58f6966df189df94e08c5b3621c) )
+
+ ROM_REGION( 0x0a00, "proms", 0 )
+ ROM_LOAD( "sb-5.e8", 0x0000, 0x0100, CRC(93ab8153) SHA1(a792f24e5c0c3c4a6b436102e7a98199f878ece1) ) /* red component */
+ ROM_LOAD( "sb-6.e9", 0x0100, 0x0100, CRC(8ab44f7d) SHA1(f74680a6a987d74b3acb32e6396f20e127874149) ) /* green component */
+ ROM_LOAD( "sb-7.e10", 0x0200, 0x0100, CRC(f4ade9a4) SHA1(62ad31d31d183cce213b03168daa035083b2f28e) ) /* blue component */
+ ROM_LOAD( "sb-0.f1", 0x0300, 0x0100, CRC(6047d91b) SHA1(1ce025f9524c1033e48c5294ee7d360f8bfebe8d) ) /* char lookup table */
+ ROM_LOAD( "sb-4.d6", 0x0400, 0x0100, CRC(4858968d) SHA1(20b5dbcaa1a4081b3139e7e2332d8fe3c9e55ed6) ) /* tile lookup table */
+ ROM_LOAD( "sb-8.k3", 0x0500, 0x0100, CRC(f6fad943) SHA1(b0a24ea7805272e8ebf72a99b08907bc00d5f82f) ) /* sprite lookup table */
+ ROM_LOAD( "sb-2.d1", 0x0600, 0x0100, CRC(8bb8b3df) SHA1(49de2819c4c92057fedcb20425282515d85829aa) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-3.d2", 0x0700, 0x0100, CRC(3b0c99af) SHA1(38f30ac1e48632634e409f328ee3051b987de7ad) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-1.k6", 0x0800, 0x0100, CRC(712ac508) SHA1(5349d722ab6733afdda65f6e0a98322f0d515e86) ) /* interrupt timing (not used) */
+ ROM_LOAD( "sb-9.m11", 0x0900, 0x0100, CRC(4921635c) SHA1(aee37d6cdc36acf0f11ff5f93e7b16e4b12f6c39) ) /* video timing? (not used) */
+ROM_END
+
+ROM_START( 1942w )
+ ROM_REGION( 0x1c000, "maincpu", 0 ) /* 64k for code + 3*16k for the banked ROMs images */
+ ROM_LOAD( "sw-03.m3", 0x00000, 0x4000, CRC(afd79770) SHA1(74c7a887fe3d4abfce1dcfec4c75b21ab81adc8c) )
+ ROM_LOAD( "sw-04.m4", 0x04000, 0x4000, CRC(933d9910) SHA1(9c73ef880f56e30a865be959f8bbdbe79c7ef8e2) )
+ ROM_LOAD( "sw-05.m5", 0x10000, 0x4000, CRC(e9a71bb6) SHA1(1f0d52c9282d15f9e4898b3b144ece25d345b71f) )
+ ROM_LOAD( "sw-06.m6", 0x14000, 0x2000, CRC(466f8248) SHA1(2ccc8fc59962d3001fbc10e8d2f20a254a74f251) ) /* matches srb-06.m6 from 1942 (Revision B) */
+ ROM_LOAD( "sw-07.m7", 0x18000, 0x4000, CRC(ec41655e) SHA1(dbe4bb11f2e88574cb43ba5cd216354c3b7f69a6) )
+
+ ROM_REGION( 0x10000, "audiocpu", 0 )
+ ROM_LOAD( "sr-01.c11", 0x0000, 0x4000, CRC(bd87f06b) SHA1(821f85cf157f81117eeaba0c3cf0337eac357e58) )
+
+ ROM_REGION( 0x2000, "gfx1", 0 )
+ ROM_LOAD( "sw-02.f2", 0x0000, 0x2000, CRC(f8e9ada2) SHA1(028f554e70425c53faa30a6fe1c45cc16724560a) ) /* characters */
+
+ ROM_REGION( 0xc000, "gfx2", 0 )
+ ROM_LOAD( "sr-08.a1", 0x0000, 0x2000, CRC(3884d9eb) SHA1(5cbd9215fa5ba5a61208b383700adc4428521aed) ) /* tiles */
+ ROM_LOAD( "sr-09.a2", 0x2000, 0x2000, CRC(999cf6e0) SHA1(5b8b685038ec98b781908b92eb7fb9506db68544) )
+ ROM_LOAD( "sr-10.a3", 0x4000, 0x2000, CRC(8edb273a) SHA1(85fdd4c690ed31e6396e3c16aa02140ee7ea2d61) )
+ ROM_LOAD( "sr-11.a4", 0x6000, 0x2000, CRC(3a2726c3) SHA1(187c92ef591febdcbd1d42ab850e0cbb62c00873) )
+ ROM_LOAD( "sr-12.a5", 0x8000, 0x2000, CRC(1bd3d8bb) SHA1(ef4dce605eb4dc8035985a415315ec61c21419c6) )
+ ROM_LOAD( "sr-13.a6", 0xa000, 0x2000, CRC(658f02c4) SHA1(f087d69e49e38cf3107350cde18fcf85a8fa04f0) )
+
+ ROM_REGION( 0x10000, "gfx3", 0 )
+ ROM_LOAD( "sr-14.l1", 0x00000, 0x4000, CRC(2528bec6) SHA1(29f7719f18faad6bd1ec6735cc24e69168361470) ) /* sprites */
+ ROM_LOAD( "sr-15.l2", 0x04000, 0x4000, CRC(f89287aa) SHA1(136fff6d2a4f48a488fc7c620213761459c3ada0) )
+ ROM_LOAD( "sr-16.n1", 0x08000, 0x4000, CRC(024418f8) SHA1(145b8d5d6c8654cd090955a98f6dd8c8dbafe7c1) )
+ ROM_LOAD( "sr-17.n2", 0x0c000, 0x4000, CRC(e2c7e489) SHA1(d4b5d575c021f58f6966df189df94e08c5b3621c) )
+
+ ROM_REGION( 0x0a00, "proms", 0 )
+ ROM_LOAD( "sb-5.e8", 0x0000, 0x0100, CRC(93ab8153) SHA1(a792f24e5c0c3c4a6b436102e7a98199f878ece1) ) /* red component */
+ ROM_LOAD( "sb-6.e9", 0x0100, 0x0100, CRC(8ab44f7d) SHA1(f74680a6a987d74b3acb32e6396f20e127874149) ) /* green component */
+ ROM_LOAD( "sb-7.e10", 0x0200, 0x0100, CRC(f4ade9a4) SHA1(62ad31d31d183cce213b03168daa035083b2f28e) ) /* blue component */
+ ROM_LOAD( "sb-0.f1", 0x0300, 0x0100, CRC(6047d91b) SHA1(1ce025f9524c1033e48c5294ee7d360f8bfebe8d) ) /* char lookup table */
+ ROM_LOAD( "sb-4.d6", 0x0400, 0x0100, CRC(4858968d) SHA1(20b5dbcaa1a4081b3139e7e2332d8fe3c9e55ed6) ) /* tile lookup table */
+ ROM_LOAD( "sb-8.k3", 0x0500, 0x0100, CRC(f6fad943) SHA1(b0a24ea7805272e8ebf72a99b08907bc00d5f82f) ) /* sprite lookup table */
+ ROM_LOAD( "sb-2.d1", 0x0600, 0x0100, CRC(8bb8b3df) SHA1(49de2819c4c92057fedcb20425282515d85829aa) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-3.d2", 0x0700, 0x0100, CRC(3b0c99af) SHA1(38f30ac1e48632634e409f328ee3051b987de7ad) ) /* tile palette selector? (not used) */
+ ROM_LOAD( "sb-1.k6", 0x0800, 0x0100, CRC(712ac508) SHA1(5349d722ab6733afdda65f6e0a98322f0d515e86) ) /* interrupt timing (not used) */
+ ROM_LOAD( "sb-9.m11", 0x0900, 0x0100, CRC(4921635c) SHA1(aee37d6cdc36acf0f11ff5f93e7b16e4b12f6c39) ) /* video timing? (not used) */
+ROM_END
+
+
+static DRIVER_INIT( 1942 )
+{
+ UINT8 *ROM = machine.root_device().memregion("maincpu")->base();
+ machine.root_device().membank("bank1")->configure_entries(0, 3, &ROM[0x10000], 0x4000);
+}
+
+
+GAME( 1984, 1942, 0, 1942, 1942, 1942, ROT270, "Capcom", "1942 (Revision B)", GAME_SUPPORTS_SAVE )
+GAME( 1984, 1942a, 1942, 1942, 1942, 1942, ROT270, "Capcom", "1942 (Revision A)", GAME_SUPPORTS_SAVE )
+GAME( 1984, 1942abl, 1942, 1942, 1942, 1942, ROT270, "bootleg", "1942 (Revision A, bootleg)", GAME_SUPPORTS_SAVE ) // data is the same as 1942a set, different rom format
+GAME( 1984, 1942b, 1942, 1942, 1942, 1942, ROT270, "Capcom", "1942 (First Version)", GAME_SUPPORTS_SAVE )
+GAME( 1985, 1942w, 1942, 1942, 1942, 1942, ROT270, "Capcom (Williams Electronics license)", "1942 (Williams Electronics license)", GAME_SUPPORTS_SAVE ) /* Based on 1942 (Revision B) */