// license:BSD-3-Clause // copyright-holders:Al Kossow /* 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 One 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 The cabinet has backdrop artwork, a lightbulb for explosions, and two large (paddles pretending to be) guns. */ #include "emu.h" #include "includes/m79amb.h" #include "cpu/i8085/i8085.h" #include "screen.h" #include "speaker.h" void m79amb_state::machine_start() { m_self_test.resolve(); } WRITE8_MEMBER(m79amb_state::ramtek_videoram_w) { m_videoram[offset] = data & ~*m_mask; } uint32_t m79amb_state::screen_update_ramtek(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { offs_t offs; for (offs = 0; offs < 0x2000; offs++) { int i; uint8_t data = m_videoram[offs]; int y = offs >> 5; int x = (offs & 0x1f) << 3; for (i = 0; i < 8; i++) { pen_t pen = (data & 0x80) ? rgb_t::white() : rgb_t::black(); bitmap.pix32(y, x) = pen; x++; data <<= 1; } } return 0; } READ8_MEMBER(m79amb_state::gray5bit_controller0_r) { uint8_t port_data = ioport("8004")->read(); uint8_t gun_pos = ioport("GUN1")->read(); return (port_data & 0xe0) | m_lut_gun1[gun_pos]; } READ8_MEMBER(m79amb_state::gray5bit_controller1_r) { uint8_t port_data = ioport("8005")->read(); uint8_t gun_pos = ioport("GUN2")->read(); return (port_data & 0xe0) | m_lut_gun2[gun_pos]; } WRITE8_MEMBER(m79amb_state::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); } void m79amb_state::main_map(address_map &map) { map(0x0000, 0x1fff).rom(); map(0x4000, 0x5fff).ram().w(this, FUNC(m79amb_state::ramtek_videoram_w)).share("videoram"); map(0x6000, 0x63ff).ram(); /* ?? */ map(0x8000, 0x8000).portr("8000").w(this, FUNC(m79amb_state::m79amb_8000_w)); map(0x8001, 0x8001).writeonly().share("mask"); map(0x8002, 0x8002).portr("8002").w(this, FUNC(m79amb_state::m79amb_8002_w)); map(0x8003, 0x8003).w(this, FUNC(m79amb_state::m79amb_8003_w)); map(0x8004, 0x8004).r(this, FUNC(m79amb_state::gray5bit_controller0_r)); map(0x8005, 0x8005).r(this, FUNC(m79amb_state::gray5bit_controller1_r)); map(0xc000, 0xc07f).ram(); /* ?? */ map(0xc200, 0xc27f).ram(); /* ?? */ } 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_CUSTOM ) PORT_VBLANK("screen") 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, IP_ACTIVE_LOW, IPT_UNUSED ) // gun 1 here 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, IP_ACTIVE_LOW, IPT_UNUSED ) // gun 2 here 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 ) // fake ports for the guns PORT_START("GUN1") PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_CROSSHAIR(X, (1.0-(19.0/256.0)), 19.0/256.0, 30.0/224.0) PORT_MINMAX(19,255) PORT_SENSITIVITY(50) PORT_KEYDELTA(5) PORT_CENTERDELTA(0) PORT_PLAYER(1) PORT_START("GUN2") PORT_BIT( 0xff, 0x80, IPT_PADDLE ) PORT_CROSSHAIR(X, (1.0-(22.0/256.0)), 0.0, 30.0/224.0) PORT_MINMAX(0,234) PORT_SENSITIVITY(50) PORT_KEYDELTA(5) PORT_CENTERDELTA(0) PORT_PLAYER(2) INPUT_PORTS_END INTERRUPT_GEN_MEMBER(m79amb_state::m79amb_interrupt) { device.execute().set_input_line_and_vector(0, HOLD_LINE, 0xcf); /* RST 08h */ } MACHINE_CONFIG_START(m79amb_state::m79amb) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu", I8080, XTAL(19'660'800) / 10) MCFG_DEVICE_PROGRAM_MAP(main_map) MCFG_DEVICE_VBLANK_INT_DRIVER("screen", m79amb_state, m79amb_interrupt) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */) MCFG_SCREEN_SIZE(32*8, 32*8) MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 4*8, 32*8-1) MCFG_SCREEN_UPDATE_DRIVER(m79amb_state, screen_update_ramtek) /* sound hardware */ SPEAKER(config, "mono").front_center(); MCFG_DEVICE_ADD("discrete", DISCRETE, m79amb_discrete) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MACHINE_CONFIG_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 /* grenade trajectory per gun position is inconsistent and sloppy in the game: 0, 1, 3, 2, 6, 7, 5, 4 - gun position 90.00, 90.00, 90.00, 90.00, 86.42, 86.42, 86.42, 86.42 - grenade trajectory (angle, est) 18.0, 18.0, 18.0, 18.0, 27.2, 27.2, 27.2, 31.2 - crosses with y=28 (x, est) 12, 13, 15, 14, 10, 11, 9, 8, 84.39, 84.39, 84.39, 80.87, 79.00, 80.87, 79.00, 79.00 41.9, 48.9, 56.8, 75.8, 87.2, 88.8, 101.6, 107.6 24, 25, 27, 26, 30, 31, 29, 28, 79.00, 79.00, 75.59, 75.59, 75.59, 73.72, 73.72, 73.72 114.1, 121.5, 138.8, 146.0, 152.7, 162.6, 167.6, 172.7 20, 21, 23, 22, 18, 19, 17, 16 73.72, 70.08, 70.08, 70.08, 67.97, 67.97, 64.34, 64.34 181.6, 199.9, 205.4, 211.9, 223.5, 232.4, 254.0, 254.0 */ static const uint8_t lut_cross[0x20] = { 19, 20, 21, 23, 25, 27, 29, 37, 45, 53, 66, 82, 88, 95, 105, 111, 118, 130, 142, 149, 158, 165, 170, 177, 191, 203, 209, 218, 228, 243, 249, 255, }; static const uint8_t lut_pos[0x20] = { 0x1f, 0x1e, 0x1c, 0x1d, 0x19, 0x18, 0x1a, 0x1b, 0x13, 0x12, 0x10, 0x11, 0x15, 0x14, 0x16, 0x17, 0x07, 0x06, 0x04, 0x05, 0x01, 0x00, 0x02, 0x03, 0x0b, 0x0a, 0x08, 0x09, 0x0d, 0x0c, 0x0e, 0x0f }; void m79amb_state::init_m79amb() { uint8_t *rom = memregion("maincpu")->base(); /* PROM data is active low */ for (int i = 0; i < 0x2000; i++) rom[i] = ~rom[i]; /* gun positions */ for (int i = 0; i < 0x100; i++) { /* gun 1, start at left 18 */ for (int j = 0; j < 0x20; j++) { if (i <= lut_cross[j]) { m_lut_gun1[i] = lut_pos[j]; break; } } /* gun 2, start at right 235 */ for (int j = 0; j < 0x20; j++) { if (i >= (253 - lut_cross[j])) { m_lut_gun2[i] = lut_pos[j]; break; } } } } GAME( 1977, m79amb, 0, m79amb, m79amb, m79amb_state, init_m79amb, ROT0, "Ramtek", "M-79 Ambush", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )