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path: root/src/mame/drivers/maxaflex.cpp
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// 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<cpu_device> m_maincpu;    // maincpu is already contained in atari_common_state
	required_device<cpu_device> m_mcu;
	required_device<speaker_sound_device> m_speaker;
	required_region_ptr<UINT8> 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_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<timer_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 )