/**************************************************************************** Sega "Space Tactics" Driver Frank Palazzolo (palazzol@home.com) Master processor - Intel 8080A Memory Map: 0000-2fff ROM R 4000-47ff RAM R/W 5000-5fff switches/status R 6000-6fff dips sw R 6000-600f Coin rjct/palette select W 6010-601f sound triggers W 6020-602f lamp latch W 6030-603f speed latch W 6040-605f shot related W 6060-606f score display W 60a0-60e0 sound triggers2 W 7000-7fff RNG/swit R LS Nibble are a VBlank counter used as a RNG 8000-8fff swit/stat R 8000-8fff offset RAM W 9000-9fff V pos reg. R Reads counter from an encoder wheel a000-afff H pos reg. R Reads counter from an encoder wheel b000-bfff VRAM B R/W alphanumerics, bases, barrier, enemy bombs d000-dfff VRAM D R/W furthest aliens (scrolling) e000-efff VRAM E R/W middle aliens (scrolling) f000-ffff VRAM F R/W closest aliens (scrolling) -------------------------------------------------------------------- At this time, emulation is missing: Sound (all discrete and a 76477) Verify Color PROM resistor values (Last 8 colors) ****************************************************************************/ #include "emu.h" #include "cpu/i8085/i8085.h" #include "includes/stactics.h" #include "stactics.lh" /************************************* * * Mirror motor handling * *************************************/ static CUSTOM_INPUT( get_motor_not_ready ) { stactics_state *state = field.machine().driver_data(); /* if the motor is self-centering, but not centered yet */ return ((*state->m_motor_on & 0x01) == 0) && ((state->m_horiz_pos != 0) || (state->m_vert_pos != 0)); } static READ8_HANDLER( vert_pos_r ) { stactics_state *state = space->machine().driver_data(); return 0x70 - state->m_vert_pos; } static READ8_HANDLER( horiz_pos_r ) { stactics_state *state = space->machine().driver_data(); return state->m_horiz_pos + 0x88; } static void move_motor(running_machine &machine, stactics_state *state) { /* monitor motor under joystick control */ if (*state->m_motor_on & 0x01) { int ip3 = input_port_read(machine, "IN3"); int ip4 = input_port_read(machine, "FAKE"); /* up */ if (((ip4 & 0x01) == 0) && (state->m_vert_pos > -128)) state->m_vert_pos--; /* down */ if (((ip4 & 0x02) == 0) && (state->m_vert_pos < 127)) state->m_vert_pos++; /* left */ if (((ip3 & 0x20) == 0) && (state->m_horiz_pos < 127)) state->m_horiz_pos++; /* right */ if (((ip3 & 0x40) == 0) && (state->m_horiz_pos > -128)) state->m_horiz_pos--; } /* monitor motor under self-centering control */ else { if (state->m_horiz_pos > 0) state->m_horiz_pos--; else if (state->m_horiz_pos < 0) state->m_horiz_pos++; if (state->m_vert_pos > 0) state->m_vert_pos--; else if (state->m_vert_pos < 0) state->m_vert_pos++; } } /************************************* * * Random number generator * *************************************/ static CUSTOM_INPUT( get_rng ) { /* this is a 555 timer, but cannot read one of the resistor values */ return field.machine().rand() & 0x07; } /************************************* * * Coin lockout * *************************************/ static WRITE8_HANDLER( stactics_coin_lockout_w ) { coin_lockout_w(space->machine(), offset, ~data & 0x01); } /************************************* * * Interrupt system * *************************************/ static INTERRUPT_GEN( stactics_interrupt ) { stactics_state *state = device->machine().driver_data(); move_motor(device->machine(), state); device_set_input_line(device, 0, HOLD_LINE); } /************************************* * * Data CPU memory handlers * *************************************/ static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8 ) AM_RANGE(0x0000, 0x2fff) AM_ROM AM_RANGE(0x4000, 0x40ff) AM_MIRROR(0x0700) AM_RAM AM_RANGE(0x5000, 0x5000) AM_MIRROR(0x0fff) AM_READ_PORT("IN0") AM_RANGE(0x6000, 0x6000) AM_MIRROR(0x0fff) AM_READ_PORT("IN1") AM_RANGE(0x6000, 0x6001) AM_MIRROR(0x0f08) AM_WRITE(stactics_coin_lockout_w) AM_RANGE(0x6002, 0x6005) AM_MIRROR(0x0f08) AM_WRITENOP AM_RANGE(0x6006, 0x6007) AM_MIRROR(0x0f08) AM_WRITEONLY AM_BASE_MEMBER(stactics_state, m_palette) /* AM_RANGE(0x6010, 0x6017) AM_MIRROR(0x0f08) AM_WRITE(stactics_sound_w) */ AM_RANGE(0x6016, 0x6016) AM_MIRROR(0x0f08) AM_WRITEONLY AM_BASE_MEMBER(stactics_state, m_motor_on) /* Note: This overlaps rocket sound */ AM_RANGE(0x6020, 0x6027) AM_MIRROR(0x0f08) AM_WRITEONLY AM_BASE_MEMBER(stactics_state, m_lamps) AM_RANGE(0x6030, 0x6030) AM_MIRROR(0x0f0f) AM_WRITE(stactics_speed_latch_w) AM_RANGE(0x6040, 0x6040) AM_MIRROR(0x0f0f) AM_WRITE(stactics_shot_trigger_w) AM_RANGE(0x6050, 0x6050) AM_MIRROR(0x0f0f) AM_WRITE(stactics_shot_flag_clear_w) AM_RANGE(0x6060, 0x606f) AM_MIRROR(0x0f00) AM_WRITEONLY AM_BASE_MEMBER(stactics_state, m_display_buffer) AM_RANGE(0x6070, 0x609f) AM_MIRROR(0x0f00) AM_WRITENOP /* AM_RANGE(0x60a0, 0x60ef) AM_MIRROR(0x0f00) AM_WRITE(stactics_sound2_w) */ AM_RANGE(0x60f0, 0x60ff) AM_MIRROR(0x0f00) AM_WRITENOP AM_RANGE(0x7000, 0x7000) AM_MIRROR(0x0fff) AM_READ_PORT("IN2") AM_RANGE(0x8000, 0x8000) AM_MIRROR(0x0fff) AM_READ_PORT("IN3") AM_RANGE(0x8000, 0x87ff) AM_MIRROR(0x0800) AM_WRITE(stactics_scroll_ram_w) AM_RANGE(0x9000, 0x9000) AM_MIRROR(0x0fff) AM_READ(vert_pos_r) AM_RANGE(0xa000, 0xa000) AM_MIRROR(0x0fff) AM_READ(horiz_pos_r) AM_RANGE(0xb000, 0xbfff) AM_RAM AM_BASE_MEMBER(stactics_state, m_videoram_b) AM_RANGE(0xc000, 0xcfff) AM_NOP AM_RANGE(0xd000, 0xdfff) AM_RAM AM_BASE_MEMBER(stactics_state, m_videoram_d) AM_RANGE(0xe000, 0xefff) AM_RAM AM_BASE_MEMBER(stactics_state, m_videoram_e) AM_RANGE(0xf000, 0xffff) AM_RAM AM_BASE_MEMBER(stactics_state, m_videoram_f) ADDRESS_MAP_END /************************************* * * Input port definitions * *************************************/ static INPUT_PORTS_START( stactics ) PORT_START("IN0") /* IN0 */ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON7 ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(get_motor_not_ready, NULL) PORT_START("IN1") /* IN1 */ PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_B ) ) PORT_DIPSETTING( 0x01, DEF_STR( 4C_1C ) ) PORT_DIPSETTING( 0x05, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x07, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x06, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x04, DEF_STR( 1C_3C ) ) PORT_DIPSETTING( 0x02, DEF_STR( 1C_4C ) ) PORT_DIPSETTING( 0x00, DEF_STR( 1C_5C ) ) PORT_DIPSETTING( 0x03, DEF_STR( 1C_6C ) ) PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_A ) ) PORT_DIPSETTING( 0x08, DEF_STR( 4C_1C ) ) PORT_DIPSETTING( 0x28, DEF_STR( 2C_1C ) ) PORT_DIPSETTING( 0x38, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x30, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x20, DEF_STR( 1C_3C ) ) PORT_DIPSETTING( 0x10, DEF_STR( 1C_4C ) ) PORT_DIPSETTING( 0x00, DEF_STR( 1C_5C ) ) PORT_DIPSETTING( 0x18, DEF_STR( 1C_6C ) ) PORT_DIPNAME( 0x40, 0x00, "High Score Initial Entry" ) PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPSETTING( 0x80, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_START("IN2") /* IN2 */ PORT_BIT( 0x07, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(get_rng, NULL) PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(stactics_get_frame_count_d3, NULL) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_DIPNAME( 0x40, 0x40, DEF_STR( Free_Play ) ) PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_SERVICE( 0x80, IP_ACTIVE_LOW ) PORT_START("IN3") /* IN3 */ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(stactics_get_shot_standby, NULL) PORT_DIPNAME( 0x04, 0x04, "Number of Barriers" ) PORT_DIPSETTING( 0x04, "4" ) PORT_DIPSETTING( 0x00, "6" ) PORT_DIPNAME( 0x08, 0x08, "Bonus Barriers" ) PORT_DIPSETTING( 0x08, "1" ) PORT_DIPSETTING( 0x00, "2" ) PORT_DIPNAME( 0x10, 0x00, "Extended Play" ) PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) PORT_DIPSETTING( 0x00, DEF_STR( On ) ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(stactics_get_not_shot_arrive, NULL) PORT_START("FAKE") /* FAKE */ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY INPUT_PORTS_END /************************************* * * Start * *************************************/ static MACHINE_START( stactics ) { stactics_state *state = machine.driver_data(); state->m_vert_pos = 0; state->m_horiz_pos = 0; *state->m_motor_on = 0; } /************************************* * * Machine driver * *************************************/ static MACHINE_CONFIG_START( stactics, stactics_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", I8080, 1933560) MCFG_CPU_PROGRAM_MAP(main_map) MCFG_CPU_VBLANK_INT("screen", stactics_interrupt) MCFG_MACHINE_START(stactics) /* video hardware */ MCFG_FRAGMENT_ADD(stactics_video) /* audio hardware */ MACHINE_CONFIG_END /************************************* * * ROM definition * *************************************/ ROM_START( stactics ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "epr-218x", 0x0000, 0x0800, CRC(b1186ad2) SHA1(88929a183ac0499619b3e07241f3b5a0c89bdab1) ) ROM_LOAD( "epr-219x", 0x0800, 0x0800, CRC(3b86036d) SHA1(6ad5e14dcfdbc6d2a0a32ae7f18ce41ab4b51eec) ) ROM_LOAD( "epr-220x", 0x1000, 0x0800, CRC(c58702da) SHA1(93936c46810722d435f9ddb0641defb741743dee) ) ROM_LOAD( "epr-221x", 0x1800, 0x0800, CRC(e327639e) SHA1(024929b65c71eaeb6d234a14d7535a7d5b98b8d3) ) ROM_LOAD( "epr-222y", 0x2000, 0x0800, CRC(24dd2bcc) SHA1(f77c59beccc1a77e3bfc2928ff532d6e221ff42d) ) ROM_LOAD( "epr-223x", 0x2800, 0x0800, CRC(7fef0940) SHA1(5b2af55f75ef0130f9202b6a916a96dbd601fcfa) ) ROM_REGION( 0x1040, "proms", 0 ) ROM_LOAD( "pr54", 0x0000, 0x0800, CRC(9640bd6e) SHA1(dd12952a6591f2056ac1b5688dca0a3a2ef69f2d) ) /* color/priority PROM */ ROM_LOAD( "pr55", 0x0800, 0x0800, CRC(f162673b) SHA1(83743780b6c1f8014df24fa0650000b7cb137d92) ) /* timing PROM (unused) */ ROM_LOAD( "pr65", 0x1000, 0x0020, CRC(a1506b9d) SHA1(037c3db2ea40eca459e8acba9d1506dd28d72d10) ) /* timing PROM (unused) */ ROM_LOAD( "pr66", 0x1020, 0x0020, CRC(78dcf300) SHA1(37034cc0cfa4a8ec47937a2a34b77ec56b387a9b) ) /* timing PROM (unused) */ ROM_REGION( 0x0820, "user1", 0 ) ROM_LOAD( "epr-217", 0x0000, 0x0800, CRC(38259f5f) SHA1(1f4182ffc2d78fca22711526bb2ae2cfe040173c) ) /* LED fire beam data */ ROM_LOAD( "pr67", 0x0800, 0x0020, CRC(b27874e7) SHA1(c24bc78c4b2ae01aaed5d994ce2e7c5e0f2eece8) ) /* LED timing ROM (unused) */ ROM_END /************************************* * * Game driver * *************************************/ GAMEL( 1981, stactics, 0, stactics, stactics, 0, ORIENTATION_FLIP_X, "Sega", "Space Tactics", GAME_NO_SOUND, layout_stactics )