/*************************************************************************** Atari Clay Shoot hardware driver by Zsolt Vasvari Games supported: * Clay Shoot Known issues: * none at this time ****************************************************************************/ #include "driver.h" #include "machine/8255ppi.h" static UINT8 *clayshoo_videoram; static size_t clayshoo_videoram_size; static UINT8 input_port_select; static UINT8 analog_port_val; static mame_timer *analog_timer_1; static mame_timer *analog_timer_2; /************************************* * * Digital control handling functions * *************************************/ static WRITE8_HANDLER( input_port_select_w ) { input_port_select = data; } static UINT8 difficulty_input_port_r(int bit) { UINT8 ret = 0; /* read fake port and remap the buttons to 2 bits */ UINT8 raw = readinputportbytag("FAKE"); if (raw & (1 << (bit + 1))) ret = 0x03; /* expert */ else if (raw & (1 << (bit + 2))) ret = 0x01; /* pro */ else ret = 0x00; /* amateur otherwise */ return ret; } static READ8_HANDLER( input_port_r ) { UINT8 ret = 0; switch (input_port_select) { case 0x01: ret = readinputportbytag("IN0"); break; case 0x02: ret = readinputportbytag("IN1"); break; case 0x04: ret = (readinputportbytag("IN2") & 0xf0) | difficulty_input_port_r(0) | (difficulty_input_port_r(3) << 2); break; case 0x08: ret = readinputportbytag("IN3"); break; case 0x10: case 0x20: break; /* these two are not really used */ default: logerror("Unexpected port read: %02X\n", input_port_select); } return ret; } /************************************* * * Analog control handling functions * *************************************/ static TIMER_CALLBACK( reset_analog_bit ) { analog_port_val &= ~param; } static mame_time compute_duration(int analog_pos) { /* the 58 comes from the length of the loop used to read the analog position */ return MAME_TIME_IN_CYCLES(58 * analog_pos, 0); } static WRITE8_HANDLER( analog_reset_w ) { /* reset the analog value, and start the two times that will fire off in a short period proportional to the position of the analog control and set the appropriate bit. */ analog_port_val = 0xff; mame_timer_adjust(analog_timer_1, compute_duration(readinputportbytag("AN1")), 0x02, time_zero); mame_timer_adjust(analog_timer_2, compute_duration(readinputportbytag("AN2")), 0x01, time_zero); } static READ8_HANDLER( analog_r ) { return analog_port_val; } static void create_analog_timers(void) { analog_timer_1 = mame_timer_alloc(reset_analog_bit); analog_timer_2 = mame_timer_alloc(reset_analog_bit); } /************************************* * * Machine setup * *************************************/ static ppi8255_interface ppi8255_intf = { 2, /* 2 chips */ { 0, 0 }, /* Port A read */ { 0, input_port_r }, /* Port B read */ { 0, 0 }, /* Port C read */ { 0, input_port_select_w }, /* Port A write */ { 0, 0 }, /* Port B write */ { 0, 0 /* sound effects */},/* Port C write */ }; static MACHINE_START( clayshoo ) { ppi8255_init(&ppi8255_intf); create_analog_timers(); /* register for state saving */ state_save_register_global(input_port_select); state_save_register_global(analog_port_val); } /************************************* * * Video hardware * *************************************/ static VIDEO_UPDATE( clayshoo ) { offs_t offs; for (offs = 0; offs < clayshoo_videoram_size; offs++) { int i; UINT8 x = offs << 3; UINT8 y = ~(offs >> 5); UINT8 data = clayshoo_videoram[offs]; for (i = 0; i < 8; i++) { pen_t pen = (data & 0x80) ? RGB_WHITE : RGB_BLACK; *BITMAP_ADDR32(bitmap, y, x) = pen; data = data << 1; x = x + 1; } } return 0; } /************************************* * * Memory handlers * *************************************/ static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 ) AM_RANGE(0x0000, 0x1fff) AM_ROM AM_RANGE(0x2000, 0x23ff) AM_RAM AM_RANGE(0x4000, 0x47ff) AM_ROM AM_RANGE(0x8000, 0x97ff) AM_RAM AM_BASE(&clayshoo_videoram) AM_SIZE(&clayshoo_videoram_size) /* 6k of video ram according to readme */ AM_RANGE(0x9800, 0xa800) AM_WRITE(MWA8_NOP) /* not really mapped, but cleared */ AM_RANGE(0xc800, 0xc800) AM_READWRITE(analog_r, analog_reset_w) ADDRESS_MAP_END /************************************* * * Port handlers * *************************************/ static ADDRESS_MAP_START( main_io_map, ADDRESS_SPACE_IO, 8 ) ADDRESS_MAP_FLAGS( AMEF_ABITS(8) ) AM_RANGE(0x00, 0x00) AM_WRITE(watchdog_reset_w) AM_RANGE(0x20, 0x23) AM_READWRITE(ppi8255_0_r, ppi8255_0_w) AM_RANGE(0x30, 0x33) AM_READWRITE(ppi8255_1_r, ppi8255_1_w) ADDRESS_MAP_END /************************************* * * Port definitions * *************************************/ INPUT_PORTS_START( clayshoo ) PORT_START_TAG("IN0") PORT_DIPNAME( 0x03, 0x00, DEF_STR( Coinage ) ) PORT_DIPSETTING( 0x00, DEF_STR( 1C_1C ) ) PORT_DIPSETTING( 0x02, DEF_STR( 2C_3C ) ) PORT_DIPSETTING( 0x01, DEF_STR( 1C_2C ) ) PORT_DIPSETTING( 0x03, DEF_STR( Free_Play ) ) PORT_BIT( 0x3c, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* doesn't appear to be used */ PORT_DIPNAME( 0x40, 0x40, DEF_STR( Demo_Sounds ) ) /* not 100% positive */ PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x40, DEF_STR( On ) ) PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) /* used */ PORT_DIPSETTING( 0x00, DEF_STR( Off ) ) PORT_DIPSETTING( 0x80, DEF_STR( On ) ) PORT_START_TAG("IN1") PORT_DIPNAME( 0x07, 0x01, "Time/Bonus 1P-2P" ) PORT_DIPSETTING( 0x00, "60/6k-90/6k" ) PORT_DIPSETTING( 0x01, "60/6k-120/8k" ) PORT_DIPSETTING( 0x02, "90/9.5k-150/9.5k" ) PORT_DIPSETTING( 0x03, "90/9.5k-190/11k" ) PORT_DIPSETTING( 0x04, "60/8k-90/8k" ) PORT_DIPSETTING( 0x05, "60/8k-120/10k" ) PORT_DIPSETTING( 0x06, "90/11.5k-150/11.5k" ) PORT_DIPSETTING( 0x07, "90/11.5k-190/13k" ) PORT_BIT( 0xf8, IP_ACTIVE_LOW, IPT_UNKNOWN ) /* doesn't appear to be used */ PORT_START_TAG("IN2") PORT_BIT( 0x03, IP_ACTIVE_LOW, IPT_SPECIAL ) /* amateur/expert/pro Player 2 */ PORT_BIT( 0x0c, IP_ACTIVE_LOW, IPT_SPECIAL ) /* amateur/expert/pro Player 1 */ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START1 ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START2 ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_START_TAG("IN3") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0xfe, IP_ACTIVE_LOW, IPT_UNKNOWN ) PORT_START_TAG("AN1") /* IN4 - Fake analog control. Visible in $c800 bit 1 */ PORT_BIT( 0x0f, 0x08, IPT_AD_STICK_Y ) PORT_MINMAX(0,0x0f) PORT_SENSITIVITY(10) PORT_KEYDELTA(10) PORT_REVERSE PORT_PLAYER(1) PORT_BIT( 0xf0, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START_TAG("AN2") /* IN5 - Fake analog control. Visible in $c800 bit 0 */ PORT_BIT( 0x0f, 0x08, IPT_AD_STICK_Y ) PORT_MINMAX(0,0x0f) PORT_SENSITIVITY(10) PORT_KEYDELTA(10) PORT_REVERSE PORT_PLAYER(2) PORT_BIT( 0xf0, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START_TAG("FAKE") /* IN6 - Fake. Visible in IN2 bits 0-1 and 2-3 */ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_TOGGLE PORT_PLAYER(2) PORT_NAME("P2 Amateur Difficulty") PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_TOGGLE PORT_PLAYER(2) PORT_NAME("P2 Expert Difficulty") PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_TOGGLE PORT_PLAYER(2) PORT_NAME("P2 Pro Difficulty") PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_BUTTON2 ) PORT_TOGGLE PORT_PLAYER(1) PORT_NAME("P1 Amateur Difficulty") PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_BUTTON3 ) PORT_TOGGLE PORT_PLAYER(1) PORT_NAME("P1 Expert Difficulty") PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_TOGGLE PORT_PLAYER(1) PORT_NAME("P2 Pro Difficulty") PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED ) INPUT_PORTS_END /************************************* * * Machine driver * *************************************/ static MACHINE_DRIVER_START( clayshoo ) /* basic machine hardware */ MDRV_CPU_ADD(Z80,5068000/4) /* 5.068/4 Mhz (divider is a guess) */ MDRV_CPU_PROGRAM_MAP(main_map,0) MDRV_CPU_IO_MAP(main_io_map,0) MDRV_CPU_VBLANK_INT(irq0_line_hold,1) MDRV_MACHINE_START(clayshoo) /* video hardware */ MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER) MDRV_VIDEO_UPDATE(clayshoo) MDRV_SCREEN_ADD("main", 0) MDRV_SCREEN_FORMAT(BITMAP_FORMAT_RGB32) MDRV_SCREEN_SIZE(256, 256) MDRV_SCREEN_VISIBLE_AREA(0, 255, 64, 255) MDRV_SCREEN_REFRESH_RATE(60) MDRV_SCREEN_VBLANK_TIME(DEFAULT_REAL_60HZ_VBLANK_DURATION) MACHINE_DRIVER_END /************************************* * * ROM definitions * *************************************/ ROM_START( clayshoo ) ROM_REGION( 0x10000, REGION_CPU1, 0 ) ROM_LOAD( "0", 0x0000, 0x0800, CRC(9df9d9e3) SHA1(8ce71a6faf5df9c8c3dbb92a443b62c0f376491c) ) ROM_LOAD( "1", 0x0800, 0x0800, CRC(5134a631) SHA1(f0764a5161934564fd0416be26087cf812e0c422) ) ROM_LOAD( "2", 0x1000, 0x0800, CRC(5b5a67f6) SHA1(c97b4d44e6dc5dd0c42e04ffceed8934975fe769) ) ROM_LOAD( "3", 0x1800, 0x0800, CRC(7eda8e44) SHA1(2974f8b06653aee2ffd96ff402707acfc059bc91) ) ROM_LOAD( "4", 0x4000, 0x0800, CRC(3da16196) SHA1(eb0c0cf0c8fc3db05ac0c469fb20fe92ae6f27ce) ) ROM_END /************************************* * * Game drivers * *************************************/ GAME( 1979, clayshoo, 0, clayshoo, clayshoo, 0, ROT0, "Allied Leisure", "Clay Shoot", GAME_NO_SOUND | GAME_SUPPORTS_SAVE)