// license:BSD-3-Clause // copyright-holders:Mariusz Wojcieszek, Aaron Giles /****************************************************************************** Exidy Max-A-Flex driver by Mariusz Wojcieszek Based on Atari 400/800 MESS Driver by Juergen Buchmueller TODO: - fix LCD digits display controlling ******************************************************************************/ #include "emu.h" #include "cpu/m6502/m6502.h" #include "cpu/m6805/m6805.h" #include "includes/atari400.h" #include "sound/speaker.h" #include "sound/pokey.h" #include "machine/6821pia.h" #include "video/gtia.h" #include "maxaflex.lh" class maxaflex_state : public atari_common_state { public: maxaflex_state(const machine_config &mconfig, device_type type, const char *tag) : atari_common_state(mconfig, type, tag), m_mcu(*this, "mcu"), m_speaker(*this, "speaker"), m_region_maincpu(*this, "maincpu"), m_dsw(*this, "dsw"), m_coin(*this, "coin"), m_console(*this, "console"), m_joy01(*this, "djoy_0_1"), m_joy23(*this, "djoy_2_3") { } UINT8 m_portA_in; UINT8 m_portA_out; UINT8 m_ddrA; UINT8 m_portB_in; UINT8 m_portB_out; UINT8 m_ddrB; UINT8 m_portC_in; UINT8 m_portC_out; UINT8 m_ddrC; UINT8 m_tdr; UINT8 m_tcr; timer_device *m_mcu_timer; void mmu(UINT8 new_mmu); DECLARE_READ8_MEMBER(mcu_portA_r); DECLARE_WRITE8_MEMBER(mcu_portA_w); DECLARE_READ8_MEMBER(mcu_portB_r); DECLARE_WRITE8_MEMBER(mcu_portB_w); DECLARE_READ8_MEMBER(mcu_portC_r); DECLARE_WRITE8_MEMBER(mcu_portC_w); DECLARE_READ8_MEMBER(mcu_ddr_r); DECLARE_WRITE8_MEMBER(mcu_portA_ddr_w); DECLARE_WRITE8_MEMBER(mcu_portB_ddr_w); DECLARE_WRITE8_MEMBER(mcu_portC_ddr_w); DECLARE_READ8_MEMBER(mcu_tdr_r); DECLARE_WRITE8_MEMBER(mcu_tdr_w); DECLARE_READ8_MEMBER(mcu_tcr_r); DECLARE_WRITE8_MEMBER(mcu_tcr_w); DECLARE_INPUT_CHANGED_MEMBER(coin_inserted); DECLARE_READ8_MEMBER(pia_pa_r); DECLARE_READ8_MEMBER(pia_pb_r); WRITE8_MEMBER(pia_pb_w) { mmu(data); } WRITE_LINE_MEMBER(pia_cb2_w) { } // This is used by Floppy drive on Atari 8bits Home Computers TIMER_DEVICE_CALLBACK_MEMBER(mf_interrupt); TIMER_DEVICE_CALLBACK_MEMBER(mcu_timer_proc); int atari_input_disabled(); virtual void machine_reset() override; //required_device m_maincpu; // maincpu is already contained in atari_common_state required_device m_mcu; required_device m_speaker; required_region_ptr m_region_maincpu; required_ioport m_dsw; required_ioport m_coin; required_ioport m_console; required_ioport m_joy01; required_ioport m_joy23; }; void maxaflex_state::mmu(UINT8 new_mmu) { /* check if self-test ROM changed */ if (new_mmu & 0x80) { logerror("%s MMU SELFTEST RAM\n", machine().system().name); m_maincpu->space(AS_PROGRAM).nop_readwrite(0x5000, 0x57ff); } else { logerror("%s MMU SELFTEST ROM\n", machine().system().name); m_maincpu->space(AS_PROGRAM).install_rom(0x5000, 0x57ff, &m_region_maincpu[0xd000]); m_maincpu->space(AS_PROGRAM).unmap_write(0x5000, 0x57ff); } } /* Supervisor board emulation */ /* Port A: 0 (in) DSW 1 (in) DSW 2 (in) DSW 3 (in) DSW 4 (in) coin 5 (in) START button 6 - 7 (out) AUDIO */ READ8_MEMBER(maxaflex_state::mcu_portA_r) { m_portA_in = m_dsw->read() | (m_coin->read() << 4) | (m_console->read() << 5); return (m_portA_in & ~m_ddrA) | (m_portA_out & m_ddrA); } WRITE8_MEMBER(maxaflex_state::mcu_portA_w) { m_portA_out = data; m_speaker->level_w(data >> 7); } /* Port B: 0 (out) Select 7-segment display to control by writing port C 1 (out) 2 (out) clear coin interrupt 3 (out) STRKEY - line connected to keyboard input in 600XL, seems to be not used 4 (out) RES600 - reset 600 5 (out) AUDMUTE - mutes audio 6 (out) latch for lamps 7 (out) TOFF - enables/disables user controls */ READ8_MEMBER(maxaflex_state::mcu_portB_r) { return (m_portB_in & ~m_ddrB) | (m_portB_out & m_ddrB); } WRITE8_MEMBER(maxaflex_state::mcu_portB_w) { UINT8 diff = data ^ m_portB_out; m_portB_out = data; /* clear coin interrupt */ if (data & 0x04) m_mcu->set_input_line(M6805_IRQ_LINE, CLEAR_LINE ); /* AUDMUTE */ machine().sound().system_enable((data >> 5) & 1); /* RES600 */ if (diff & 0x10) m_maincpu->set_input_line(INPUT_LINE_RESET, (data & 0x10) ? CLEAR_LINE : ASSERT_LINE); /* latch for lamps */ if ((diff & 0x40) && !(data & 0x40)) { output().set_lamp_value(0, (m_portC_out >> 0) & 1); output().set_lamp_value(1, (m_portC_out >> 1) & 1); output().set_lamp_value(2, (m_portC_out >> 2) & 1); output().set_lamp_value(3, (m_portC_out >> 3) & 1); } } /* Port C: 0 (out) lamp COIN 1 (out) lamp PLAY 2 (out) lamp START 3 (out) lamp OVER */ READ8_MEMBER(maxaflex_state::mcu_portC_r) { return (m_portC_in & ~m_ddrC) | (m_portC_out & m_ddrC); } WRITE8_MEMBER(maxaflex_state::mcu_portC_w) { /* uses a 7447A, which is equivalent to an LS47/48 */ static const UINT8 ls48_map[16] = { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7c,0x07,0x7f,0x67,0x58,0x4c,0x62,0x69,0x78,0x00 }; m_portC_out = data & 0x0f; /* displays */ switch( m_portB_out & 0x3 ) { case 0x0: output().set_digit_value(0, ls48_map[m_portC_out]); break; case 0x1: output().set_digit_value(1, ls48_map[m_portC_out]); break; case 0x2: output().set_digit_value(2, ls48_map[m_portC_out]); break; case 0x3: break; } } READ8_MEMBER(maxaflex_state::mcu_ddr_r) { return 0xff; } WRITE8_MEMBER(maxaflex_state::mcu_portA_ddr_w) { m_ddrA = data; } WRITE8_MEMBER(maxaflex_state::mcu_portB_ddr_w) { m_ddrB = data; } WRITE8_MEMBER(maxaflex_state::mcu_portC_ddr_w) { m_ddrC = data; } TIMER_DEVICE_CALLBACK_MEMBER(maxaflex_state::mcu_timer_proc) { if ( --m_tdr == 0x00 ) { if ( (m_tcr & 0x40) == 0 ) { //timer interrupt! generic_pulse_irq_line(m_mcu, M68705_INT_TIMER, 1); } } } /* Timer Data Reg */ READ8_MEMBER(maxaflex_state::mcu_tdr_r) { return m_tdr; } WRITE8_MEMBER(maxaflex_state::mcu_tdr_w) { m_tdr = data; } /* Timer control reg */ READ8_MEMBER(maxaflex_state::mcu_tcr_r) { return m_tcr & ~0x08; } WRITE8_MEMBER(maxaflex_state::mcu_tcr_w) { m_tcr = data; if ( (m_tcr & 0x40) == 0 ) { int divider; attotime period; if ( !(m_tcr & 0x20) ) { /* internal clock / 4*/ divider = 4; } else { /* external clock */ divider = 1; } if ( m_tcr & 0x07 ) { /* use prescaler */ divider = divider * (1 << (m_tcr & 0x7)); } period = attotime::from_hz(3579545) * divider; m_mcu_timer->adjust(period, 0, period); } } INPUT_CHANGED_MEMBER(maxaflex_state::coin_inserted) { if (!newval) m_mcu->set_input_line(M6805_IRQ_LINE, HOLD_LINE ); } int maxaflex_state::atari_input_disabled() { return (m_portB_out & 0x80) == 0x00; } static ADDRESS_MAP_START(a600xl_mem, AS_PROGRAM, 8, maxaflex_state ) AM_RANGE(0x0000, 0x3fff) AM_RAM AM_RANGE(0x5000, 0x57ff) AM_ROM AM_REGION("maincpu", 0xd000) /* self test */ AM_RANGE(0x8000, 0xbfff) AM_ROM /* game cartridge */ AM_RANGE(0xc000, 0xcfff) AM_ROM /* OS */ AM_RANGE(0xd000, 0xd0ff) AM_DEVREADWRITE("gtia", gtia_device, read, write) AM_RANGE(0xd100, 0xd1ff) AM_NOP AM_RANGE(0xd200, 0xd2ff) AM_DEVREADWRITE("pokey", pokey_device, read, write) AM_RANGE(0xd300, 0xd3ff) AM_DEVREADWRITE("pia", pia6821_device, read_alt, write_alt) AM_RANGE(0xd400, 0xd4ff) AM_DEVREADWRITE("antic", antic_device, read, write) AM_RANGE(0xd500, 0xd7ff) AM_NOP AM_RANGE(0xd800, 0xffff) AM_ROM /* OS */ ADDRESS_MAP_END static ADDRESS_MAP_START( mcu_mem, AS_PROGRAM, 8, maxaflex_state ) ADDRESS_MAP_GLOBAL_MASK(0x7ff) AM_RANGE(0x0000, 0x0000) AM_READ(mcu_portA_r) AM_WRITE(mcu_portA_w) AM_RANGE(0x0001, 0x0001) AM_READ(mcu_portB_r) AM_WRITE(mcu_portB_w) AM_RANGE(0x0002, 0x0002) AM_READ(mcu_portC_r) AM_WRITE(mcu_portC_w) AM_RANGE(0x0004, 0x0004) AM_READ(mcu_ddr_r) AM_WRITE(mcu_portA_ddr_w) AM_RANGE(0x0005, 0x0005) AM_READ(mcu_ddr_r) AM_WRITE(mcu_portB_ddr_w) AM_RANGE(0x0006, 0x0006) AM_READ(mcu_ddr_r) AM_WRITE(mcu_portC_ddr_w) AM_RANGE(0x0008, 0x0008) AM_READ(mcu_tdr_r) AM_WRITE(mcu_tdr_w) AM_RANGE(0x0009, 0x0009) AM_READ(mcu_tcr_r) AM_WRITE(mcu_tcr_w) AM_RANGE(0x0010, 0x007f) AM_RAM AM_RANGE(0x0080, 0x07ff) AM_ROM ADDRESS_MAP_END static INPUT_PORTS_START( a600xl ) PORT_START("console") PORT_BIT(0x04, 0x04, IPT_KEYPAD) PORT_NAME("Option") PORT_CODE(KEYCODE_F2) PORT_BIT(0x02, 0x02, IPT_KEYPAD) PORT_NAME("Select") PORT_CODE(KEYCODE_F1) PORT_BIT(0x01, 0x01, IPT_START1 ) PORT_START("djoy_0_1") PORT_BIT(0x01, 0x01, IPT_JOYSTICK_UP) PORT_PLAYER(1) PORT_BIT(0x02, 0x02, IPT_JOYSTICK_DOWN) PORT_PLAYER(1) PORT_BIT(0x04, 0x04, IPT_JOYSTICK_LEFT) PORT_PLAYER(1) PORT_BIT(0x08, 0x08, IPT_JOYSTICK_RIGHT) PORT_PLAYER(1) /* player #2 input is not connected */ PORT_BIT(0x10, 0x10, IPT_JOYSTICK_UP) PORT_PLAYER(2) PORT_BIT(0x20, 0x20, IPT_JOYSTICK_DOWN) PORT_PLAYER(2) PORT_BIT(0x40, 0x40, IPT_JOYSTICK_LEFT) PORT_PLAYER(2) PORT_BIT(0x80, 0x80, IPT_JOYSTICK_RIGHT) PORT_PLAYER(2) PORT_START("djoy_2_3") /* not connected */ PORT_BIT(0x01, 0x01, IPT_JOYSTICK_UP) PORT_PLAYER(3) PORT_BIT(0x02, 0x02, IPT_JOYSTICK_DOWN) PORT_PLAYER(3) PORT_BIT(0x04, 0x04, IPT_JOYSTICK_LEFT) PORT_PLAYER(3) PORT_BIT(0x08, 0x08, IPT_JOYSTICK_RIGHT) PORT_PLAYER(3) PORT_BIT(0x10, 0x10, IPT_JOYSTICK_UP) PORT_PLAYER(4) PORT_BIT(0x20, 0x20, IPT_JOYSTICK_DOWN) PORT_PLAYER(4) PORT_BIT(0x40, 0x40, IPT_JOYSTICK_LEFT) PORT_PLAYER(4) PORT_BIT(0x80, 0x80, IPT_JOYSTICK_RIGHT) PORT_PLAYER(4) PORT_START("djoy_b") PORT_BIT(0x01, 0x01, IPT_BUTTON1) PORT_PLAYER(1) PORT_BIT(0x02, 0x02, IPT_BUTTON1) PORT_PLAYER(2) PORT_BIT(0x04, 0x04, IPT_BUTTON1) PORT_PLAYER(3) PORT_BIT(0x08, 0x08, IPT_BUTTON1) PORT_PLAYER(4) PORT_BIT(0x10, 0x10, IPT_BUTTON2) PORT_PLAYER(1) PORT_BIT(0x20, 0x20, IPT_BUTTON2) PORT_PLAYER(2) PORT_BIT(0x40, 0x40, IPT_BUTTON2) PORT_PLAYER(3) PORT_BIT(0x80, 0x80, IPT_BUTTON2) PORT_PLAYER(4) /* Max-A-Flex specific ports */ PORT_START("coin") PORT_BIT(0x1, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_CHANGED_MEMBER(DEVICE_SELF, maxaflex_state,coin_inserted, 0) PORT_START("dsw") PORT_DIPNAME(0xf, 0x9, "Coin/Time" ) PORT_DIPSETTING( 0x0, "30 sec" ) PORT_DIPSETTING( 0x1, "60 sec" ) PORT_DIPSETTING( 0x2, "90 sec" ) PORT_DIPSETTING( 0x3, "120 sec" ) PORT_DIPSETTING( 0x4, "150 sec" ) PORT_DIPSETTING( 0x5, "180 sec" ) PORT_DIPSETTING( 0x6, "210 sec" ) PORT_DIPSETTING( 0x7, "240 sec" ) PORT_DIPSETTING( 0x8, "270 sec" ) PORT_DIPSETTING( 0x9, "300 sec" ) PORT_DIPSETTING( 0xa, "330 sec" ) PORT_DIPSETTING( 0xb, "360 sec" ) PORT_DIPSETTING( 0xc, "390 sec" ) PORT_DIPSETTING( 0xd, "420 sec" ) PORT_DIPSETTING( 0xe, "450 sec" ) PORT_DIPSETTING( 0xf, "480 sec" ) INPUT_PORTS_END READ8_MEMBER(maxaflex_state::pia_pa_r) { return atari_input_disabled() ? 0xff : read_safe(m_joy01, 0); } READ8_MEMBER(maxaflex_state::pia_pb_r) { return atari_input_disabled() ? 0xff : read_safe(m_joy23, 0); } void maxaflex_state::machine_reset() { pokey_device *pokey = machine().device("pokey"); pokey->write(15,0); // Supervisor board reset m_portA_in = m_portA_out = m_ddrA = 0; m_portB_in = m_portB_out = m_ddrB = 0; m_portC_in = m_portC_out = m_ddrC = 0; m_tdr = m_tcr = 0; m_mcu_timer = machine().device("mcu_timer"); output().set_lamp_value(0, 0); output().set_lamp_value(1, 0); output().set_lamp_value(2, 0); output().set_lamp_value(3, 0); output().set_digit_value(0, 0x00); output().set_digit_value(1, 0x00); output().set_digit_value(2, 0x00); } TIMER_DEVICE_CALLBACK_MEMBER( maxaflex_state::mf_interrupt ) { m_antic->generic_interrupt(2); } static MACHINE_CONFIG_START( maxaflex, maxaflex_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", M6502, FREQ_17_EXACT) MCFG_CPU_PROGRAM_MAP(a600xl_mem) MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", maxaflex_state, mf_interrupt, "screen", 0, 1) MCFG_CPU_ADD("mcu", M68705, 3579545) MCFG_CPU_PROGRAM_MAP(mcu_mem) MCFG_DEVICE_ADD("gtia", ATARI_GTIA, 0) MCFG_GTIA_READ_CB(IOPORT("console")) MCFG_DEVICE_ADD("antic", ATARI_ANTIC, 0) MCFG_ANTIC_GTIA("gtia") MCFG_DEVICE_ADD("pia", PIA6821, 0) MCFG_PIA_READPA_HANDLER(READ8(maxaflex_state, pia_pa_r)) MCFG_PIA_READPB_HANDLER(READ8(maxaflex_state, pia_pb_r)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(maxaflex_state, pia_pb_w)) MCFG_PIA_CB2_HANDLER(WRITELINE(maxaflex_state, pia_cb2_w)) MCFG_TIMER_DRIVER_ADD("mcu_timer", maxaflex_state, mcu_timer_proc) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0)) MCFG_SCREEN_VISIBLE_AREA(MIN_X, MAX_X, MIN_Y, MAX_Y) MCFG_SCREEN_REFRESH_RATE(FRAME_RATE_60HZ) MCFG_SCREEN_SIZE(HWIDTH*8, TOTAL_LINES_60HZ) MCFG_SCREEN_UPDATE_DEVICE("antic", antic_device, screen_update) MCFG_SCREEN_PALETTE("palette") MCFG_PALETTE_ADD("palette", 256) MCFG_PALETTE_INIT_OWNER(atari_common_state, atari) MCFG_DEFAULT_LAYOUT(layout_maxaflex) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("pokey", POKEY, FREQ_17_EXACT) MCFG_POKEY_INTERRUPT_CB(atari_common_state, interrupt_cb) MCFG_POKEY_OUTPUT_RC(RES_K(1), CAP_U(0.0), 5.0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0) MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) MACHINE_CONFIG_END ROM_START(maxaflex) ROM_REGION(0x10000,"maincpu",0) /* 64K for the CPU */ ROM_LOAD("atarixl.rom", 0xc000, 0x4000, CRC(1f9cd270) SHA1(ae4f523ba08b6fd59f3cae515a2b2410bbd98f55)) ROM_REGION( 0x0800, "mcu", 0 ) /* 2k for the microcontroller */ ROM_LOAD("maxaflex.uc", 0x0000, 0x0800, CRC(fe9cf53c) SHA1(4b02bc2f0c8a1eab799814fac82d5812c0160206)) ROM_REGION( 0x200, "proms", 0 ) ROM_LOAD("maxprom.prm", 0x0000, 0x0200, CRC(edf5c950) SHA1(9ad046ea41a61585dd8d2f2d4167a3cc39d2928f)) /* for simulating keystrokes ?*/ ROM_END ROM_START(mf_bdash) ROM_REGION(0x10000,"maincpu",0) /* 64K for the CPU */ ROM_LOAD("bd-acs-1.rom", 0x8000, 0x2000, CRC(2b11750e) SHA1(43e9ae44eb1767621920bb94a4370ed602d81056)) ROM_LOAD("bd-acs-2.rom", 0xa000, 0x2000, CRC(e9ea2658) SHA1(189ede7201ef122cf2b72fc847a896b9dbe007e5)) ROM_LOAD("atarixl.rom", 0xc000, 0x4000, CRC(1f9cd270) SHA1(ae4f523ba08b6fd59f3cae515a2b2410bbd98f55)) ROM_REGION( 0x0800, "mcu", 0 ) /* 2k for the microcontroller */ ROM_LOAD("maxaflex.uc", 0x0000, 0x0800, CRC(fe9cf53c) SHA1(4b02bc2f0c8a1eab799814fac82d5812c0160206)) ROM_REGION( 0x200, "proms", 0 ) ROM_LOAD("maxprom.prm", 0x0000, 0x0200, CRC(edf5c950) SHA1(9ad046ea41a61585dd8d2f2d4167a3cc39d2928f)) /* for simulating keystrokes ?*/ ROM_END ROM_START(mf_achas) ROM_REGION(0x10000,"maincpu",0) /* 64K for the CPU */ ROM_LOAD("ac.rom", 0x8000, 0x4000, CRC(18752991) SHA1(f508b89d2251c53d017cff6cb23b8e9880a0cc0b)) ROM_LOAD("atarixl.rom", 0xc000, 0x4000, CRC(1f9cd270) SHA1(ae4f523ba08b6fd59f3cae515a2b2410bbd98f55)) ROM_REGION( 0x0800, "mcu", 0 ) /* 2k for the microcontroller */ ROM_LOAD("maxaflex.uc", 0x0000, 0x0800, CRC(fe9cf53c) SHA1(4b02bc2f0c8a1eab799814fac82d5812c0160206)) ROM_REGION( 0x200, "proms", 0 ) ROM_LOAD("maxprom.prm", 0x0000, 0x0200, CRC(edf5c950) SHA1(9ad046ea41a61585dd8d2f2d4167a3cc39d2928f)) /* for simulating keystrokes ?*/ ROM_END ROM_START(mf_brist) ROM_REGION(0x10000,"maincpu",0) /* 64K for the CPU */ ROM_LOAD("brist.rom", 0x8000, 0x4000, CRC(4263d64d) SHA1(80a041bceb499e1466516488013aa4439b3db6f2)) ROM_LOAD("atarixl.rom", 0xc000, 0x4000, CRC(1f9cd270) SHA1(ae4f523ba08b6fd59f3cae515a2b2410bbd98f55)) ROM_REGION( 0x0800, "mcu", 0 ) /* 2k for the microcontroller */ ROM_LOAD("maxaflex.uc", 0x0000, 0x0800, CRC(fe9cf53c) SHA1(4b02bc2f0c8a1eab799814fac82d5812c0160206)) ROM_REGION( 0x200, "proms", 0 ) ROM_LOAD("maxprom.prm", 0x0000, 0x0200, CRC(edf5c950) SHA1(9ad046ea41a61585dd8d2f2d4167a3cc39d2928f)) /* for simulating keystrokes ?*/ ROM_END ROM_START(mf_flip) ROM_REGION(0x10000,"maincpu",0) /* 64K for the CPU */ ROM_LOAD("flipflop.rom", 0x8000, 0x4000, CRC(8ae057be) SHA1(ba26d6a3790ebdb754c1192b2c28f0fe93aca377)) ROM_LOAD("atarixl.rom", 0xc000, 0x4000, CRC(1f9cd270) SHA1(ae4f523ba08b6fd59f3cae515a2b2410bbd98f55)) ROM_REGION( 0x0800, "mcu", 0 ) /* 2k for the microcontroller */ ROM_LOAD("maxaflex.uc", 0x0000, 0x0800, CRC(fe9cf53c) SHA1(4b02bc2f0c8a1eab799814fac82d5812c0160206)) ROM_REGION( 0x200, "proms", 0 ) ROM_LOAD("maxprom.prm", 0x0000, 0x0200, CRC(edf5c950) SHA1(9ad046ea41a61585dd8d2f2d4167a3cc39d2928f)) /* for simulating keystrokes ?*/ ROM_END GAME( 1984, maxaflex, 0, maxaflex, a600xl, driver_device, 0, ROT0, "Exidy", "Max-A-Flex", MACHINE_IS_BIOS_ROOT ) GAME( 1982, mf_achas, maxaflex, maxaflex, a600xl, driver_device, 0, ROT0, "Exidy / First Star Software", "Astro Chase (Max-A-Flex)", 0 ) GAME( 1983, mf_brist, maxaflex, maxaflex, a600xl, driver_device, 0, ROT0, "Exidy / First Star Software", "Bristles (Max-A-Flex)", 0 ) GAME( 1983, mf_flip, maxaflex, maxaflex, a600xl, driver_device, 0, ROT0, "Exidy / First Star Software", "Flip & Flop (Max-A-Flex)", 0 ) GAME( 1984, mf_bdash, maxaflex, maxaflex, a600xl, driver_device, 0, ROT0, "Exidy / First Star Software", "Boulder Dash (Max-A-Flex)", 0 )