// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari "Stella on Steroids" hardware **************************************************************************** Games supported: * BeatHead Known bugs: * none known **************************************************************************** Memory map =================================================================================================== MAIN CPU =================================================================================================== 00000000-0001FFFFF R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx Main RAM 01800000-01BFFFFFF R xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx Main ROM 40000000-4000007FF R/W -------- -------- -------- xxxxxxxx EEPROM 41000000 R -------- -------- -------- xxxxxxxx Data from sound board 41000000 W -------- -------- -------- xxxxxxxx Data to sound board 41000100 R -------- -------- -------- -----xxx Interrupt enables -------- -------- -------- -----x-- (scanline int enable) -------- -------- -------- ------x- (unknown int enable) -------- -------- -------- -------x (unknown int enable) 41000100 W -------- -------- -------- -------- Interrupt acknowledge 41000104 W -------- -------- -------- -------- Unknown int disable 41000108 W -------- -------- -------- -------- Unknown int disable 4100010c W -------- -------- -------- -------- Scanline int disable 41000114 W -------- -------- -------- -------- Unknown int enable 41000118 W -------- -------- -------- -------- Unknown int enable 4100011c W -------- -------- -------- -------- Scanline int enable 41000200 R -------- -------- xxxx--xx xxxx--xx Player 2/3 inputs R -------- -------- xxxx---- -------- (player 3 joystick UDLR) R -------- -------- ------x- -------- (player 3 button 1) R -------- -------- -------x -------- (player 3 button 2) R -------- -------- -------- xxxx---- (player 2 joystick UDLR) R -------- -------- -------- ------x- (player 2 button 1) R -------- -------- -------- -------x (player 2 button 2) 41000204 R -------- -------- xxxx--xx xxxx--xx Player 1/4 inputs R -------- -------- xxxx---- -------- (player 1 joystick UDLR) R -------- -------- ------x- -------- (player 1 button 1) R -------- -------- -------x -------- (player 1 button 2) R -------- -------- -------- xxxx---- (player 4 joystick UDLR) R -------- -------- -------- ------x- (player 4 button 1) R -------- -------- -------- -------x (player 4 button 2) 41000208 W -------- -------- -------- -------- Sound /RESET assert 4100020C W -------- -------- -------- -------- Sound /RESET deassert 41000220 W -------- -------- -------- -------- Coin counter assert 41000224 W -------- -------- -------- -------- Coin counter deassert 41000300 R -------- -------- xxxxxxxx -xxx---- DIP switches/additional inputs R -------- -------- xxxxxxxx -------- (debug DIP switches) R -------- -------- -------- -x------ (service switch) R -------- -------- -------- --x----- (sound output buffer full) R -------- -------- -------- ---x---- (sound input buffer full) 41000304 R -------- -------- -------- xxxxxxxx Coin/service inputs R -------- -------- -------- xxxx---- (service inputs: R,RC,LC,L) R -------- -------- -------- ----xxxx (coin inputs: R,RC,LC,L) 41000400 W -------- -------- -------- -xxxxxxx Palette select 41000500 W -------- -------- -------- -------- EEPROM write enable 41000600 W -------- -------- -------- ----xxxx Finescroll, vertical SYNC flags W -------- -------- -------- ----x--- (VBLANK) W -------- -------- -------- -----x-- (VSYNC) W -------- -------- -------- ------xx (fine scroll value) 41000700 W -------- -------- -------- -------- Watchdog reset 42000000-4201FFFF R/W -------- -------- xxxxxxxx xxxxxxxx Palette RAM R/W -------- -------- x------- -------- (LSB of all three components) R/W -------- -------- -xxxxx-- -------- (red component) R/W -------- -------- ------xx xxx----- (green component) R/W -------- -------- -------- ---xxxxx (blue component) 43000000 W -------- -------- ----xxxx xxxxxxxx HSYNC RAM address latch W -------- -------- ----x--- -------- (counter enable) W -------- -------- -----xxx xxxxxxxx (RAM address) 43000004 R/W -------- -------- -------- xxxxx--- HSYNC RAM data latch R/W -------- -------- -------- x------- (generate IRQ) R/W -------- -------- -------- -x------ (VRAM shift enable) R/W -------- -------- -------- --x----- (HBLANK) R/W -------- -------- -------- ---x---- (/HSYNC) R/W -------- -------- -------- ----x--- (release wait for sync) 43000008 W -------- -------- -------- ---x-xx- HSYNC unknown control 8DF80000 R -------- -------- -------- -------- Unknown 8F380000-8F3FFFFF W -------- -------- -------- -------- VRAM latch address 8F900000-8F97FFFF W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx VRAM transparent write 8F980000-8F9FFFFF R/W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx VRAM standard read/write 8FB80000-8FBFFFFF W ----xxxx ----xxxx ----xxxx ----xxxx VRAM "bulk" write W ----xxxx -------- -------- -------- (enable byte lanes for word 3?) W -------- ----xxxx -------- -------- (enable byte lanes for word 2?) W -------- -------- ----xxxx -------- (enable byte lanes for word 1?) W -------- -------- -------- ----xxxx (enable byte lanes for word 0?) 8FFF8000 W xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx VRAM "bulk" data latch 9E280000-9E2FFFFF W -------- -------- -------- -------- VRAM copy destination address latch =================================================================================================== ***************************************************************************/ #include "emu.h" #include "includes/beathead.h" #include "machine/eeprompar.h" #include "machine/watchdog.h" #include "speaker.h" #define MAX_SCANLINES 262 /************************************* * * Machine init * *************************************/ TIMER_DEVICE_CALLBACK_MEMBER(beathead_state::scanline_callback) { int scanline = param; /* update the video */ m_screen->update_partial(m_screen->vpos()); /* on scanline zero, clear any halt condition */ if (scanline == 0) m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE); /* wrap around at 262 */ scanline++; if (scanline >= MAX_SCANLINES) scanline = 0; /* set the scanline IRQ */ m_irq_state[2] = 1; update_interrupts(); /* set the timer for the next one */ m_scan_timer->adjust(m_screen->time_until_pos(scanline) - m_hblank_offset, scanline); } void beathead_state::machine_reset() { /* the code is temporarily mapped at 0 at startup */ /* just copying the first 0x40 bytes is sufficient */ memcpy(m_ram_base, m_rom_base, 0x40); /* compute the timing of the HBLANK interrupt and set the first timer */ m_hblank_offset = m_screen->scan_period() * (455 - 336 - 25) / 455; m_scan_timer->adjust(m_screen->time_until_pos(0) - m_hblank_offset); /* reset IRQs */ m_irq_line_state = CLEAR_LINE; m_irq_state[0] = m_irq_state[1] = m_irq_state[2] = 0; m_irq_enable[0] = m_irq_enable[1] = m_irq_enable[2] = 0; } /************************************* * * Interrupt handling * *************************************/ void beathead_state::update_interrupts() { int gen_int; /* compute the combined interrupt signal */ gen_int = m_irq_state[0] & m_irq_enable[0]; gen_int |= m_irq_state[1] & m_irq_enable[1]; gen_int |= m_irq_state[2] & m_irq_enable[2]; gen_int = gen_int ? ASSERT_LINE : CLEAR_LINE; /* if it's changed since the last time, call through */ if (m_irq_line_state != gen_int) { m_irq_line_state = gen_int; //if (m_irq_line_state != CLEAR_LINE) m_maincpu->set_input_line(ASAP_IRQ0, m_irq_line_state); //else //asap_set_irq_line(ASAP_IRQ0, m_irq_line_state); } } WRITE32_MEMBER( beathead_state::interrupt_control_w ) { int irq = offset & 3; int control = (offset >> 2) & 1; /* offsets 1-3 seem to be the enable latches for the IRQs */ if (irq != 0) m_irq_enable[irq - 1] = control; /* offset 0 seems to be the interrupt ack */ else m_irq_state[0] = m_irq_state[1] = m_irq_state[2] = 0; /* update the current state */ update_interrupts(); } READ32_MEMBER( beathead_state::interrupt_control_r ) { /* return the enables as a bitfield */ return (m_irq_enable[0]) | (m_irq_enable[1] << 1) | (m_irq_enable[2] << 2); } /************************************* * * Sound communication * *************************************/ WRITE32_MEMBER( beathead_state::sound_reset_w ) { logerror("Sound reset = %d\n", !offset); m_jsa->soundcpu().set_input_line(INPUT_LINE_RESET, offset ? CLEAR_LINE : ASSERT_LINE); } /************************************* * * Misc other I/O * *************************************/ WRITE32_MEMBER( beathead_state::coin_count_w ) { machine().bookkeeping().coin_counter_w(0, !offset); } /************************************* * * Main CPU memory handlers * *************************************/ void beathead_state::main_map(address_map &map) { map(0x00000000, 0x0001ffff).ram().share("ram_base"); map(0x01800000, 0x01bfffff).rom().region("user1", 0).share("rom_base"); map(0x40000000, 0x400007ff).rw("eeprom", FUNC(eeprom_parallel_28xx_device::read), FUNC(eeprom_parallel_28xx_device::write)).umask32(0x000000ff); map(0x41000000, 0x41000000).rw(m_jsa, FUNC(atari_jsa_iii_device::main_response_r), FUNC(atari_jsa_iii_device::main_command_w)); map(0x41000100, 0x41000103).r(FUNC(beathead_state::interrupt_control_r)); map(0x41000100, 0x4100011f).w(FUNC(beathead_state::interrupt_control_w)); map(0x41000200, 0x41000203).portr("IN1"); map(0x41000204, 0x41000207).portr("IN0"); map(0x41000208, 0x4100020f).w(FUNC(beathead_state::sound_reset_w)); map(0x41000220, 0x41000227).w(FUNC(beathead_state::coin_count_w)); map(0x41000300, 0x41000303).portr("IN2"); map(0x41000304, 0x41000307).portr("IN3"); map(0x41000400, 0x41000403).writeonly().share("palette_select"); map(0x41000500, 0x41000500).w("eeprom", FUNC(eeprom_parallel_28xx_device::unlock_write8)); map(0x41000600, 0x41000603).w(FUNC(beathead_state::finescroll_w)); map(0x41000700, 0x41000703).w("watchdog", FUNC(watchdog_timer_device::reset32_w)); map(0x42000000, 0x4201ffff).rw(m_palette, FUNC(palette_device::read16), FUNC(palette_device::write16)).umask32(0x0000ffff).share("palette"); map(0x43000000, 0x43000007).rw(FUNC(beathead_state::hsync_ram_r), FUNC(beathead_state::hsync_ram_w)); map(0x8df80000, 0x8df80003).nopr(); /* noisy x4 during scanline int */ map(0x8f380000, 0x8f3fffff).w(FUNC(beathead_state::vram_latch_w)); map(0x8f900000, 0x8f97ffff).w(FUNC(beathead_state::vram_transparent_w)); map(0x8f980000, 0x8f9fffff).ram().share("videoram"); map(0x8fb80000, 0x8fbfffff).w(FUNC(beathead_state::vram_bulk_w)); map(0x8fff8000, 0x8fff8003).writeonly().share("vram_bulk_latch"); map(0x9e280000, 0x9e2fffff).w(FUNC(beathead_state::vram_copy_w)); } /************************************* * * Port definitions * *************************************/ static INPUT_PORTS_START( beathead ) PORT_START("IN0") /* Player 1 */ PORT_BIT( 0x00ff, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1) PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1) PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1) PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1) PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1) PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1) PORT_START("IN1") /* Player 2 */ PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2) PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2) PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2) PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2) PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2) PORT_BIT( 0xff00, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("IN2") PORT_BIT( 0x000f, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_CUSTOM ) PORT_ATARI_JSA_SOUND_TO_MAIN_READY("jsa") PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_CUSTOM ) PORT_ATARI_JSA_MAIN_TO_SOUND_READY("jsa") PORT_SERVICE( 0x0040, IP_ACTIVE_LOW ) PORT_BIT( 0xff80, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("IN3") PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_BIT( 0x0006, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_COIN2 ) PORT_BIT( 0xfff0, IP_ACTIVE_LOW, IPT_UNUSED ) // to do // PORT_MODIFY("jsa:JSAIII") // coin 1+2 import from JSAIII not used - set to unused // PORT_BIT( 0x03, IP_ACTIVE_HIGH, IPT_UNUSED ) INPUT_PORTS_END /************************************* * * Machine driver * *************************************/ MACHINE_CONFIG_START(beathead_state::beathead) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu", ASAP, ATARI_CLOCK_14MHz) MCFG_DEVICE_PROGRAM_MAP(main_map) EEPROM_2804(config, "eeprom").lock_after_write(true); WATCHDOG_TIMER(config, "watchdog"); MCFG_TIMER_DRIVER_ADD(m_scan_timer, beathead_state, scanline_callback) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_BEFORE_VBLANK) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_UPDATE_DRIVER(beathead_state, screen_update) MCFG_SCREEN_SIZE(42*8, 262) MCFG_SCREEN_VISIBLE_AREA(0*8, 42*8-1, 0*8, 30*8-1) MCFG_SCREEN_PALETTE(m_palette) PALETTE(config, m_palette); m_palette->set_format(palette_device::IRGB_1555, 32768); m_palette->set_membits(16); /* sound hardware */ SPEAKER(config, "mono").front_center(); ATARI_JSA_III(config, m_jsa, 0); m_jsa->test_read_cb().set_ioport("IN2").bit(6); m_jsa->add_route(ALL_OUTPUTS, "mono", 1.0); MACHINE_CONFIG_END /************************************* * * ROM definition(s) * *************************************/ ROM_START( beathead ) ROM_REGION( 0x10000, "jsa:cpu", 0 ) /* 64k for 6502 code */ ROM_LOAD( "bhsnd.bin", 0x00000, 0x10000, CRC(dfd33f02) SHA1(479a4838c89691d5a4654a4cd84b6433a9e86109) ) ROM_REGION32_LE( 0x400000, "user1", 0 ) /* 4MB for ASAP code */ ROM_LOAD32_BYTE( "bhprog0.bin", 0x000000, 0x80000, CRC(87975721) SHA1(862cb3a290c829aedea26ee7100c50a12e9517e7) ) ROM_LOAD32_BYTE( "bhprog1.bin", 0x000001, 0x80000, CRC(25d89743) SHA1(9ff9a41355aa6914efc4a44909026e648a3c40f3) ) ROM_LOAD32_BYTE( "bhprog2.bin", 0x000002, 0x80000, CRC(87722609) SHA1(dbd766fa57f4528702a98db28ae48fb5d2a7f7df) ) ROM_LOAD32_BYTE( "bhprog3.bin", 0x000003, 0x80000, CRC(a795d616) SHA1(d3b201be62486f3b12e1b20c4694eeff0b4e3fca) ) ROM_LOAD32_BYTE( "bhpics0.bin", 0x200000, 0x80000, CRC(926bf65d) SHA1(49f25a2844ca1cd940d17fc56c0d2698e95e0e1d) ) ROM_LOAD32_BYTE( "bhpics1.bin", 0x200001, 0x80000, CRC(a8f12e41) SHA1(693cb7a2510f34af5442870a6ae4d19445d991f9) ) ROM_LOAD32_BYTE( "bhpics2.bin", 0x200002, 0x80000, CRC(00b96481) SHA1(39daa46321c1d4f8bce8c25d0450b97f1f19dedb) ) ROM_LOAD32_BYTE( "bhpics3.bin", 0x200003, 0x80000, CRC(99c4f1db) SHA1(aba4440c5cdf413f970a0c65457e2d1b37caf2d6) ) ROM_REGION( 0x80000, "jsa:oki1", 0 ) /* 1MB for ADPCM */ ROM_LOAD( "bhpcm0.bin", 0x00000, 0x20000, CRC(609ca626) SHA1(9bfc913fc4c3453b132595f8553245376bce3a51) ) ROM_LOAD( "bhpcm1.bin", 0x20000, 0x20000, CRC(35511509) SHA1(41294b81e253db5d2f30f8589dd59729a31bb2bb) ) ROM_LOAD( "bhpcm2.bin", 0x40000, 0x20000, CRC(f71a840a) SHA1(09d045552704cd1434307f9a36ce03c5c06a8ff6) ) ROM_LOAD( "bhpcm3.bin", 0x60000, 0x20000, CRC(fedd4936) SHA1(430ed894fa4bfcd56ee5a8a8ef5e161246530e2d) ) ROM_END /************************************* * * Game driver(s) * *************************************/ GAME( 1993, beathead, 0, beathead, beathead, beathead_state, empty_init, ROT0, "Atari Games", "BeatHead (prototype)", 0 )