/*************************************************************************** Midway Omega Race hardware driver by Bernd Wiebelt Games supported: * Omega Race * Delta Race (Omega Race bootleg by Allied Leisure) Known bugs: * none at this time **************************************************************************** This driver is dedicated to my loving wife Natalia Wiebelt and my daughter Lara Anna Maria Summer 1997 Bernd Wiebelt Many thanks to Al Kossow for the original sources and the solid documentation. Without him, I could never had completed this driver. -------- Most of the info here comes from the wiretap archive at: http://www.spies.com/arcade/simulation/gameHardware/ Omega Race Memory Map Version 1.1 (Jul 24,1997) --------------------- 0000 - 3fff PROM 4000 - 4bff RAM (3k) 5c00 - 5cff NVRAM (256 x 4bits) 8000 - 8fff Vec RAM (4k) 9000 - 9fff Vec ROM (4k) 15 14 13 12 11 10 --+--+--+--+--+-- 0 0 0 0 M8 - 2732 (4k) 0 0 0 1 L8 - 2732 0 0 1 0 K8 - 2732 0 0 1 1 J8 - 2732 0 1 - 0 0 0 RAM (3k) 0 1 - 0 0 1 0 1 - 0 1 0 0 1 - 1 1 1 4 Bit BB RAM (d0-d3) 1 - - 0 0 Vec RAM (4k) 1 - - 0 1 1 - - 1 0 Vec ROM (2k) E1 1 - - 1 1 Vec ROM (2k) F1 I/O Ports 8 Start/ (VG start) 9 WDOG/ (Reset watchdog) A SEQRES/ (VG stop/reset?) B RDSTOP/ d7 = stop (VG running if 0) 10 I DIP SW C4 (game ship settings) 6 5 4 3 2 1 1st bonus ship at | | | | 0 0 40,000 | | | | 0 1 50,000 | | | | 1 0 70,000 | | | | 1 1 100,000 | | | | 2nd and 3rd bonus ships | | 0 0 150,000 250,000 | | 0 1 250,000 500,000 | | 1 0 500,000 750,000 | | 1 1 750,000 1,500,000 | | ships per credit 0 0 1 credit = 2 ships / 2 credits = 4 ships 0 1 1 credit = 2 ships / 2 credits = 5 ships 1 0 1 credit = 3 ships / 2 credits = 6 ships 1 1 1 credit = 3 ships / 2 credits = 7 ships 11 I 7 = Test 6 = P1 Fire 5 = P1 Thrust 4 = Tilt 1 = Coin 2 0 = Coin 1 12 I 7 = 1P1CR 6 = 1P2CR 3 = 2P2CR -+ 2 = 2P1CR | 1 = P2Fire | 0 = P2Thr -+ cocktail only 13 O 7 = 6 = screen reverse 5 = 2 player 2 credit start LED 4 = 2 player 1 credit start LED 3 = 1 player 1 credit start LED 2 = 1 player 1 credit start LED 1 = coin meter 2 0 = coin meter 1 14 O sound command (interrupts sound Z80) 15 I encoder 1 (d7-d2) The encoder is a 64 position Grey Code encoder, or a pot and A to D converter. Unlike the quadrature inputs on Atari and Sega games, Omega Race's controller is an absolute angle. 0x00, 0x04, 0x14, 0x10, 0x18, 0x1c, 0x5c, 0x58, 0x50, 0x54, 0x44, 0x40, 0x48, 0x4c, 0x6c, 0x68, 0x60, 0x64, 0x74, 0x70, 0x78, 0x7c, 0xfc, 0xf8, 0xf0, 0xf4, 0xe4, 0xe0, 0xe8, 0xec, 0xcc, 0xc8, 0xc0, 0xc4, 0xd4, 0xd0, 0xd8, 0xdc, 0x9c, 0x98, 0x90, 0x94, 0x84, 0x80, 0x88, 0x8c, 0xac, 0xa8, 0xa0, 0xa4, 0xb4, 0xb0, 0xb8, 0xbc, 0x3c, 0x38, 0x30, 0x34, 0x24, 0x20, 0x28, 0x2c, 0x0c, 0x08 16 I encoder 2 (d5-d0) The inputs aren't scrambled as they are on the 1 player encoder 17 I DIP SW C6 (coin/cocktail settings) 8 7 6 5 4 3 2 1 coin switch 1 | | | | | 0 0 0 1 coin 2 credits | | | | | 0 0 1 1 coin 3 credits | | | | | 0 1 0 1 coin 5 credits | | | | | 0 1 1 4 coins 5 credits | | | | | 1 0 0 3 coins 4 credits | | | | | 1 0 1 2 coins 3 credits | | | | | 1 1 0 2 coins 1 credit | | | | | 1 1 1 1 coin 1 credit | | | | | | | | | | coin switch 2 | | 0 0 0 1 coin 2 credits | | 0 0 1 1 coin 3 credits | | 0 1 0 1 coin 5 credits | | 0 1 1 4 coins 5 credits | | 1 0 0 3 coins 4 credits | | 1 0 1 2 coins 3 credits | | 1 1 0 2 coins 1 credit | | 1 1 1 1 coin 1 credit | | | 0 coin play | 1 free play | 0 normal 1 cocktail display list format: (4 byte opcodes) +------+------+------+------+------+------+------+------+ |DY07 DY06 DY05 DY04 DY03 DY02 DY01 DY00 | 0 +------+------+------+------+------+------+------+------+ |OPCD3 OPCD2 OPCD1 OPCD0 DY11 DY10 DY09 DY08 | 1 OPCD 1111 = ABBREV/ +------+------+------+------+------+------+------+------+ |DX07 DX06 DX05 DX04 DX03 DX02 DX01 DX00 | 2 +------+------+------+------+------+------+------+------+ |INTEN3 INTEN2 INTEN1 INTEN0 DX11 DX10 DX09 DX08 | 3 +------+------+------+------+------+------+------+------+ Draw relative vector 0x80 1000YYYY YYYYYYYY IIIIXXXX XXXXXXXX Draw relative vector and load scale 0x90 1001YYYY YYYYYYYY SSSSXXXX XXXXXXXX Beam to absolute screen position 0xA0 1010YYYY YYYYYYYY ----XXXX XXXXXXXX Halt 0xB0 1011---- -------- Jump to subroutine 0xC0 1100AAAA AAAAAAAA Return from subroutine 0xD0 1101---- -------- Jump to new address 0xE0 1110AAAA AAAAAAAA Short vector draw 0xF0 1111YYYY IIIIXXXX Sound Z80 Memory Map 0000 ROM 1000 RAM 15 14 13 12 11 10 0 2k prom (K5) 1 2k prom (J5) 1 1k RAM (K4,J4) I/O (write-only) 0,1 8912 (K3) 2,3 8912 (J3) I/O (read-only) 0 input port from main CPU. main CPU writing port generated INT Sound Commands: 0 - reset sound CPU ***************************************************************************/ #include "driver.h" #include "vidhrdw/vector.h" #include "vidhrdw/avgdvg.h" /************************************* * * Machine init * *************************************/ static MACHINE_INIT( omegrace ) { /* Omega Race expects the vector processor to be ready. */ avgdvg_reset_w (0, 0); } /************************************* * * Vector processor interaction * *************************************/ static READ_HANDLER( omegrace_vg_go_r ) { avgdvg_go_w(0,0); return 0; } static READ_HANDLER( omegrace_vg_status_r ) { return avgdvg_done() ? 0x00 : 0x80; } /************************************* * * Input handlers * *************************************/ /* * Encoder bit mappings * The encoder is a 64 way switch, with the inputs scrambled * on the input port (and shifted 2 bits to the left for the * 1 player encoder * * 3 6 5 4 7 2 for encoder 1 (shifted two bits left..) * * * 5 4 3 2 1 0 for encoder 2 (not shifted..) */ static unsigned char spinnerTable[64] = { 0x00, 0x04, 0x14, 0x10, 0x18, 0x1c, 0x5c, 0x58, 0x50, 0x54, 0x44, 0x40, 0x48, 0x4c, 0x6c, 0x68, 0x60, 0x64, 0x74, 0x70, 0x78, 0x7c, 0xfc, 0xf8, 0xf0, 0xf4, 0xe4, 0xe0, 0xe8, 0xec, 0xcc, 0xc8, 0xc0, 0xc4, 0xd4, 0xd0, 0xd8, 0xdc, 0x9c, 0x98, 0x90, 0x94, 0x84, 0x80, 0x88, 0x8c, 0xac, 0xa8, 0xa0, 0xa4, 0xb4, 0xb0, 0xb8, 0xbc, 0x3c, 0x38, 0x30, 0x34, 0x24, 0x20, 0x28, 0x2c, 0x0c, 0x08 }; READ_HANDLER( omegrace_spinner1_r ) { return (spinnerTable[readinputport(4) & 0x3f]); } /************************************* * * Output handlers * *************************************/ WRITE_HANDLER( omegrace_leds_w ) { /* bits 0 and 1 are coin counters */ coin_counter_w(0,data & 0x01); coin_counter_w(1,data & 0x02); /* bits 2 to 5 are the start leds (4 and 5 cocktail only) */ set_led_status(0,~data & 0x04); set_led_status(1,~data & 0x08); set_led_status(2,~data & 0x10); set_led_status(3,~data & 0x20); /* bit 6 flips screen (not supported) */ } WRITE_HANDLER( omegrace_soundlatch_w ) { soundlatch_w (offset, data); cpu_set_irq_line(1, 0, HOLD_LINE); } /************************************* * * Overlay * *************************************/ OVERLAY_START( omegrace_overlay ) OVERLAY_RECT( 0.0, 0.0, 1.0, 1.0, MAKE_ARGB(0x04,0xff,0xe4,0x57) ) OVERLAY_END /************************************* * * Main CPU memory handlers * *************************************/ static MEMORY_READ_START( readmem ) { 0x0000, 0x3fff, MRA_ROM }, { 0x4000, 0x4bff, MRA_RAM }, { 0x5c00, 0x5cff, MRA_RAM }, /* NVRAM */ { 0x8000, 0x8fff, MRA_RAM }, { 0x9000, 0x9fff, MRA_ROM }, /* vector rom */ MEMORY_END static MEMORY_WRITE_START( writemem ) { 0x0000, 0x3fff, MWA_ROM }, /* Omega Race tries to write there! */ { 0x4000, 0x4bff, MWA_RAM }, { 0x5c00, 0x5cff, MWA_RAM, &generic_nvram, &generic_nvram_size }, /* NVRAM */ { 0x8000, 0x8fff, MWA_RAM, &vectorram, &vectorram_size }, /* vector ram */ { 0x9000, 0x9fff, MWA_ROM }, /* vector rom */ MEMORY_END static PORT_READ_START( readport ) { 0x08, 0x08, omegrace_vg_go_r }, { 0x09, 0x09, watchdog_reset_r }, { 0x0b, 0x0b, omegrace_vg_status_r }, /* vg_halt */ { 0x10, 0x10, input_port_0_r }, /* DIP SW C4 */ { 0x17, 0x17, input_port_1_r }, /* DIP SW C6 */ { 0x11, 0x11, input_port_2_r }, /* Player 1 input */ { 0x12, 0x12, input_port_3_r }, /* Player 2 input */ { 0x15, 0x15, omegrace_spinner1_r }, /* 1st controller */ { 0x16, 0x16, input_port_5_r }, /* 2nd controller (cocktail) */ PORT_END static PORT_WRITE_START( writeport ) { 0x0a, 0x0a, avgdvg_reset_w }, { 0x13, 0x13, omegrace_leds_w }, /* coin counters, leds, flip screen */ { 0x14, 0x14, omegrace_soundlatch_w }, /* Sound command */ PORT_END /************************************* * * Sound CPU memory handlers * *************************************/ static MEMORY_READ_START( sound_readmem ) { 0x0000, 0x07ff, MRA_ROM }, { 0x1000, 0x13ff, MRA_RAM }, MEMORY_END static MEMORY_WRITE_START( sound_writemem ) { 0x0000, 0x07ff, MWA_ROM }, { 0x1000, 0x13ff, MWA_RAM }, MEMORY_END static PORT_READ_START( sound_readport ) { 0x00, 0x00, soundlatch_r }, PORT_END static PORT_WRITE_START( sound_writeport ) { 0x00, 0x00, AY8910_control_port_0_w }, { 0x01, 0x01, AY8910_write_port_0_w }, { 0x02, 0x02, AY8910_control_port_1_w }, { 0x03, 0x03, AY8910_write_port_1_w }, PORT_END /************************************* * * Port definitions * *************************************/ INPUT_PORTS_START( omegrace ) PORT_START /* SW0 */ PORT_DIPNAME( 0x03, 0x03, "1st Bonus Life" ) PORT_DIPSETTING ( 0x00, "40k" ) PORT_DIPSETTING ( 0x01, "50k" ) PORT_DIPSETTING ( 0x02, "70k" ) PORT_DIPSETTING ( 0x03, "100k" ) PORT_DIPNAME( 0x0c, 0x0c, "2nd & 3rd Bonus Life" ) PORT_DIPSETTING ( 0x00, "150k 250k" ) PORT_DIPSETTING ( 0x04, "250k 500k" ) PORT_DIPSETTING ( 0x08, "500k 750k" ) PORT_DIPSETTING ( 0x0c, "750k 1500k" ) PORT_DIPNAME( 0x30, 0x30, "Credit(s)/Ships" ) PORT_DIPSETTING ( 0x00, "1C/2S 2C/4S" ) PORT_DIPSETTING ( 0x10, "1C/2S 2C/5S" ) PORT_DIPSETTING ( 0x20, "1C/3S 2C/6S" ) PORT_DIPSETTING ( 0x30, "1C/3S 2C/7S" ) PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unused ) ) PORT_DIPSETTING ( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x40, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unused ) ) PORT_DIPSETTING ( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x80, DEF_STR( On ) ) PORT_START /* SW1 */ PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) ) PORT_DIPSETTING ( 0x06, DEF_STR( 2C_1C ) ) PORT_DIPSETTING ( 0x07, DEF_STR( 1C_1C ) ) PORT_DIPSETTING ( 0x03, DEF_STR( 4C_5C ) ) PORT_DIPSETTING ( 0x04, DEF_STR( 3C_4C ) ) PORT_DIPSETTING ( 0x05, DEF_STR( 2C_3C ) ) PORT_DIPSETTING ( 0x00, DEF_STR( 1C_2C ) ) PORT_DIPSETTING ( 0x01, DEF_STR( 1C_3C ) ) PORT_DIPSETTING ( 0x02, DEF_STR( 1C_5C ) ) PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_B ) ) PORT_DIPSETTING ( 0x30, DEF_STR( 2C_1C ) ) PORT_DIPSETTING ( 0x38, DEF_STR( 1C_1C ) ) PORT_DIPSETTING ( 0x18, DEF_STR( 4C_5C ) ) PORT_DIPSETTING ( 0x20, DEF_STR( 3C_4C ) ) PORT_DIPSETTING ( 0x28, DEF_STR( 2C_3C ) ) PORT_DIPSETTING ( 0x00, DEF_STR( 1C_2C ) ) PORT_DIPSETTING ( 0x08, DEF_STR( 1C_3C ) ) PORT_DIPSETTING ( 0x10, DEF_STR( 1C_5C ) ) PORT_DIPNAME( 0x40, 0x00, DEF_STR( Free_Play ) ) PORT_DIPSETTING ( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING ( 0x40, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x00, DEF_STR( Cabinet ) ) PORT_DIPSETTING ( 0x00, DEF_STR( Upright ) ) PORT_DIPSETTING ( 0x80, DEF_STR( Cocktail ) ) PORT_START /* IN2 - port 0x11 */ PORT_BIT ( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT ( 0x02, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_BIT ( 0x04, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT ( 0x08, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_TILT ) PORT_BIT ( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_BIT ( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_SERVICE( 0x80, IP_ACTIVE_LOW ) PORT_START /* IN3 - port 0x12 */ PORT_BIT ( 0x01, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_COCKTAIL ) PORT_BIT ( 0x02, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_COCKTAIL ) PORT_BITX( 0x04, IP_ACTIVE_HIGH, IPT_START2, "2 Players Start (1 credit)", IP_KEY_DEFAULT, IP_JOY_DEFAULT ) PORT_BITX( 0x08, IP_ACTIVE_HIGH, IPT_START4, "2 Players Start (2 credits)", IP_KEY_DEFAULT, IP_JOY_DEFAULT ) PORT_BIT ( 0x10, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT ( 0x20, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BITX( 0x40, IP_ACTIVE_HIGH, IPT_START1, "1 Player Start (1 credit)", IP_KEY_DEFAULT, IP_JOY_DEFAULT ) PORT_BITX( 0x80, IP_ACTIVE_HIGH, IPT_START3, "1 Player Start (2 credits)", IP_KEY_DEFAULT, IP_JOY_DEFAULT ) PORT_START /* IN4 - port 0x15 - spinner */ PORT_ANALOG(0x3f, 0x00, IPT_DIAL, 12, 10, 0, 0 ) PORT_START /* IN5 - port 0x16 - second spinner */ PORT_ANALOG(0x3f, 0x00, IPT_DIAL | IPF_COCKTAIL, 12, 10, 0, 0 ) INPUT_PORTS_END /************************************* * * Sound interfaces * *************************************/ static struct AY8910interface ay8910_interface = { 2, /* 2 chips */ 1500000, /* 1.5 MHz */ { 25, 25 }, { 0 }, { 0 }, { 0 }, { 0 } }; /************************************* * * Machine drivers * *************************************/ static MACHINE_DRIVER_START( omegrace ) /* basic machine hardware */ MDRV_CPU_ADD(Z80, 3000000) MDRV_CPU_MEMORY(readmem,writemem) MDRV_CPU_PORTS(readport,writeport) MDRV_CPU_PERIODIC_INT(irq0_line_hold,250) MDRV_CPU_ADD(Z80, 1500000) MDRV_CPU_FLAGS(CPU_AUDIO_CPU) MDRV_CPU_MEMORY(sound_readmem,sound_writemem) MDRV_CPU_PORTS(sound_readport,sound_writeport) MDRV_CPU_PERIODIC_INT(nmi_line_pulse,250) MDRV_FRAMES_PER_SECOND(40) MDRV_MACHINE_INIT(omegrace) MDRV_NVRAM_HANDLER(generic_0fill) /* video hardware */ MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_VECTOR | VIDEO_RGB_DIRECT) MDRV_SCREEN_SIZE(400, 300) MDRV_VISIBLE_AREA(0, 1020, -10, 1010) MDRV_PALETTE_LENGTH(32768) MDRV_PALETTE_INIT(avg_white) MDRV_VIDEO_START(dvg) MDRV_VIDEO_UPDATE(vector) /* sound hardware */ MDRV_SOUND_ADD(AY8910, ay8910_interface) MACHINE_DRIVER_END /************************************* * * ROM definitions * *************************************/ ROM_START( omegrace ) ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */ ROM_LOAD( "omega.m7", 0x0000, 0x1000, CRC(0424d46e) SHA1(cc1ac6c06ba6f6e8466fa08286a0c70b5335af33) ) ROM_LOAD( "omega.l7", 0x1000, 0x1000, CRC(edcd7a7d) SHA1(5d142de2f48b01d563578a54fd5540e5d0ac8f4c) ) ROM_LOAD( "omega.k7", 0x2000, 0x1000, CRC(6d10f197) SHA1(9609a0cbeeef2efa10d49cde9f0afdca96e9c2f8) ) ROM_LOAD( "omega.j7", 0x3000, 0x1000, CRC(8e8d4b54) SHA1(944192c0f6f0cdb25d492ee9f33959d38a1062f2) ) ROM_LOAD( "omega.e1", 0x9000, 0x0800, CRC(1d0fdf3a) SHA1(3333397a9745874cea1dd6a1bda783cc59393b55) ) ROM_LOAD( "omega.f1", 0x9800, 0x0800, CRC(d44c0814) SHA1(2f216ee6de88bbe09775619003aee2d5aa8c554d) ) ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* 64k for audio cpu */ ROM_LOAD( "sound.k5", 0x0000, 0x0800, CRC(7d426017) SHA1(370f0fb5608819de873c845f6010cbde75a9818e) ) ROM_END ROM_START( deltrace ) ROM_REGION( 0x10000, REGION_CPU1, 0 ) /* 64k for code */ ROM_LOAD( "omega.m7", 0x0000, 0x1000, CRC(0424d46e) SHA1(cc1ac6c06ba6f6e8466fa08286a0c70b5335af33) ) ROM_LOAD( "omega.l7", 0x1000, 0x1000, CRC(edcd7a7d) SHA1(5d142de2f48b01d563578a54fd5540e5d0ac8f4c) ) ROM_LOAD( "omega.k7", 0x2000, 0x1000, CRC(6d10f197) SHA1(9609a0cbeeef2efa10d49cde9f0afdca96e9c2f8) ) ROM_LOAD( "delta.j7", 0x3000, 0x1000, CRC(8ef9541e) SHA1(89e34f50a958ac60c5f223bcb6c1c14796b903c7) ) ROM_LOAD( "omega.e1", 0x9000, 0x0800, CRC(1d0fdf3a) SHA1(3333397a9745874cea1dd6a1bda783cc59393b55) ) ROM_LOAD( "omega.f1", 0x9800, 0x0800, CRC(d44c0814) SHA1(2f216ee6de88bbe09775619003aee2d5aa8c554d) ) ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* 64k for audio cpu */ ROM_LOAD( "sound.k5", 0x0000, 0x0800, CRC(7d426017) SHA1(370f0fb5608819de873c845f6010cbde75a9818e) ) ROM_END /************************************* * * Driver initialization * *************************************/ static DRIVER_INIT( omegrace ) { artwork_set_overlay(omegrace_overlay); } /************************************* * * Game drivers * *************************************/ GAMEX( 1981, omegrace, 0, omegrace, omegrace, omegrace, ROT0, "Midway", "Omega Race", GAME_NO_COCKTAIL ) GAMEX( 1981, deltrace, omegrace, omegrace, omegrace, omegrace, ROT0, "Allied Leisure", "Delta Race", GAME_NO_COCKTAIL )