/* Ramtek M79 Ambush The following chart explains the settings of the eight switches on the DIP switch. A plus(+) in the column means the toggle switch is up on the plus side of the DIP switch. SWITCHES | 12 | 345 | 678 | ------------------------------------------------| Length of Game (seconds) | | | | 60 | 00 | | | 90 | 0+ | | | 90 | +0 | | | 120 | ++ | | | -------------------------+------+-------+-------| Points for Extended Time | | | | 1500 | | 000 | | 2500 | | +00 | | 3500 | | 0+0 | | 5000 | | ++0 | | NO extended time | | +++ | | -------------------------+------+-------+-------| Coins Per Game | | | | Free Play - two players | | | 0++ | One Coin - two players | | | 0+0 | One Coin - each player | | | 000 | Two Coins - each player | | | +00 | ------------------------------------------------- Based on extensive tests on location, the factory settings for the most universal combinations are: 60 second long game 2500 points for extended play 12345678 On coin each player 00+00000 Ports: In: 8000 DIP SW 8002 D0=VBlank 8004 Game Switch Inputs 8005 Game Switch Inputs Out: 8000 8001 Mask Sel (Manual calls it "Select All RAM") 8002 Sound Control (According to Manual) 8003 D0=SelfTest LED */ #include "driver.h" #include "m79amb.h" #include "cpu/i8085/i8085.h" static UINT8 *ramtek_videoram; static UINT8 *mask; static WRITE8_HANDLER( ramtek_videoram_w ) { ramtek_videoram[offset] = data & ~*mask; } static VIDEO_UPDATE( ramtek ) { offs_t offs; for (offs = 0; offs < 0x2000; offs++) { int i; UINT8 data = ramtek_videoram[offs]; int y = offs >> 5; int x = (offs & 0x1f) << 3; for (i = 0; i < 8; i++) { pen_t pen = (data & 0x80) ? RGB_WHITE : RGB_BLACK; *BITMAP_ADDR32(bitmap, y, x) = pen; x++; data <<= 1; } } return 0; } static const int ControllerTable[32] = { 0 , 1 , 3 , 2 , 6 , 7 , 5 , 4 , 12 , 13 , 15 , 14 , 10 , 11 , 9 , 8 , 24 , 25 , 27 , 26 , 30 , 31 , 29 , 28 , 20 , 21 , 23 , 22 , 18 , 19 , 17 , 16 }; static READ8_HANDLER( gray5bit_controller0_r ) { int port_data = input_port_read(space->machine, "8004"); return (port_data & 0xe0) | (~ControllerTable[port_data & 0x1f] & 0x1f); } static READ8_HANDLER( gray5bit_controller1_r ) { int port_data = input_port_read(space->machine, "8005"); return (port_data & 0xe0) | (~ControllerTable[port_data & 0x1f] & 0x1f); } static WRITE8_HANDLER( m79amb_8002_w ) { /* D1 may also be watchdog reset */ /* port goes to 0x7f to turn on explosion lamp */ output_set_value("EXP_LAMP", data ? 1 : 0); } static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 ) AM_RANGE(0x0000, 0x1fff) AM_ROM AM_RANGE(0x4000, 0x5fff) AM_RAM_WRITE(ramtek_videoram_w) AM_BASE(&ramtek_videoram) AM_RANGE(0x6000, 0x63ff) AM_RAM /* ?? */ AM_RANGE(0x8000, 0x8000) AM_READ_PORT("8000") AM_DEVWRITE("discrete", m79amb_8000_w) AM_RANGE(0x8001, 0x8001) AM_WRITE(SMH_RAM) AM_BASE(&mask) AM_RANGE(0x8002, 0x8002) AM_READ_PORT("8002") AM_WRITE(m79amb_8002_w) AM_RANGE(0x8003, 0x8003) AM_DEVWRITE("discrete", m79amb_8003_w) AM_RANGE(0x8004, 0x8004) AM_READ(gray5bit_controller0_r) AM_RANGE(0x8005, 0x8005) AM_READ(gray5bit_controller1_r) AM_RANGE(0xc000, 0xc07f) AM_RAM /* ?? */ AM_RANGE(0xc200, 0xc27f) AM_RAM /* ?? */ ADDRESS_MAP_END static INPUT_PORTS_START( m79amb ) PORT_START("8000") PORT_DIPNAME( 0x03, 0x00, "Play Time" ) PORT_DIPSETTING( 0x00, "60 Seconds" ) PORT_DIPSETTING( 0x01, "90 Seconds" ) PORT_DIPSETTING( 0x02, "90 Seconds" ) PORT_DIPSETTING( 0x03, "120 Seconds" ) PORT_DIPNAME( 0x1c, 0x04, "Points for Extended Time" ) PORT_DIPSETTING( 0x00, "1500" ) PORT_DIPSETTING( 0x04, "2500" ) PORT_DIPSETTING( 0x08, "3500" ) PORT_DIPSETTING( 0x0c, "5000" ) PORT_DIPSETTING( 0x1c, "No Extended Time" ) PORT_DIPNAME( 0xe0, 0x00, DEF_STR( Coinage )) PORT_DIPSETTING( 0x20, DEF_STR( 2C_1C )) PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C )) PORT_DIPSETTING( 0x40, DEF_STR( 1C_2C )) PORT_DIPSETTING( 0xc0, DEF_STR( Free_Play )) PORT_START("8002") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_VBLANK ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_TILT ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("8004") PORT_BIT( 0x1f, 0x10, IPT_PADDLE ) PORT_MINMAX(0,0x1f) PORT_SENSITIVITY(25) PORT_KEYDELTA(10) PORT_CENTERDELTA(0) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START("8005") PORT_BIT( 0x1f, 0x10, IPT_PADDLE ) PORT_MINMAX(0,0x1f) PORT_SENSITIVITY(25) PORT_KEYDELTA(10) PORT_CENTERDELTA(0) PORT_PLAYER(2) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNKNOWN ) INPUT_PORTS_END static INTERRUPT_GEN( m79amb_interrupt ) { cpu_set_input_line_and_vector(device, 0, HOLD_LINE, 0xcf); /* RST 08h */ } static DRIVER_INIT( m79amb ) { UINT8 *rom = memory_region(machine, "maincpu"); int i; /* PROM data is active low */ for (i = 0;i < 0x2000;i++) rom[i] = ~rom[i]; } static MACHINE_DRIVER_START( m79amb ) /* basic machine hardware */ MDRV_CPU_ADD("maincpu", 8080, XTAL_19_6608MHz / 10) MDRV_CPU_PROGRAM_MAP(main_map,0) MDRV_CPU_VBLANK_INT("screen", m79amb_interrupt) /* video hardware */ MDRV_SCREEN_ADD("screen", RASTER) MDRV_SCREEN_REFRESH_RATE(60) MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */) MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32) MDRV_SCREEN_SIZE(32*8, 32*8) MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 4*8, 32*8-1) MDRV_VIDEO_UPDATE(ramtek) /* sound hardware */ MDRV_SPEAKER_STANDARD_MONO("mono") MDRV_SOUND_ADD("discrete", DISCRETE, 0) MDRV_SOUND_CONFIG_DISCRETE(m79amb) MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MACHINE_DRIVER_END ROM_START( m79amb ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "m79.10t", 0x0000, 0x0200, CRC(ccf30b1e) SHA1(c1a77f8dc81c491928f81121ca5c9b7f8753794f) ) ROM_LOAD( "m79.9t", 0x0200, 0x0200, CRC(daf807dd) SHA1(16cd9d553bfb111c8380966cbde39dbddd5fe58c) ) ROM_LOAD( "m79.8t", 0x0400, 0x0200, CRC(79fafa02) SHA1(440620f5be44febdd7c64014739dc71fb570cc92) ) ROM_LOAD( "m79.7t", 0x0600, 0x0200, CRC(06f511f8) SHA1(a8dcaec0723b8ac9ad9474e3e931a23d7aa4ec23) ) ROM_LOAD( "m79.6t", 0x0800, 0x0200, CRC(24634390) SHA1(bc5f2ae5a49904dde1bd5e6b134571bf1d912735) ) ROM_LOAD( "m79.5t", 0x0a00, 0x0200, CRC(95252aa6) SHA1(e7ea598f864510557b511682a5d2223a512ff029) ) ROM_LOAD( "m79.4t", 0x0c00, 0x0200, CRC(54cffb0f) SHA1(4a4ad921ef6324c927a2e4a9da624d8096b6d87b) ) ROM_LOAD( "m79.3ta", 0x0e00, 0x0200, CRC(27db5ede) SHA1(890587181497ed6e1d45ed501790a6d4d3315f00) ) ROM_LOAD( "m79.10u", 0x1000, 0x0200, CRC(e41d13d2) SHA1(cc2911f46a0465305e4c7bc08f55acd065f93534) ) ROM_LOAD( "m79.9u", 0x1200, 0x0200, CRC(e35f5616) SHA1(394ad92ad7dd233ece17335cf20aef8861b41508) ) ROM_LOAD( "m79.8u", 0x1400, 0x0200, CRC(14eafd7c) SHA1(ca2d17f6ae1c3ff461a1b2bc6f37622e70cdaae8) ) ROM_LOAD( "m79.7u", 0x1600, 0x0200, CRC(b9864f25) SHA1(9330cf96b7bce13e0ee3ad746b00e82ef10c3989) ) ROM_LOAD( "m79.6u", 0x1800, 0x0200, CRC(dd25197f) SHA1(13eaf40251de82e817f488a9de738aadd8f6715e) ) ROM_LOAD( "m79.5u", 0x1a00, 0x0200, CRC(251545e2) SHA1(05a0d5e8f143ea376fb3c517cf5e9d0d3534b933) ) ROM_LOAD( "m79.4u", 0x1c00, 0x0200, CRC(b5f55c75) SHA1(f478cde73ae961be7b58c769f035eef58fd45555) ) ROM_LOAD( "m79.3u", 0x1e00, 0x0200, CRC(e968691a) SHA1(7024d10f2af195fc4050861706b1f3d22cb22a9c) ) ROM_END GAME( 1977, m79amb, 0, m79amb, m79amb, m79amb, ROT0, "Ramtek", "M-79 Ambush", GAME_IMPERFECT_SOUND )