C++ IOPORT函数代码示例

static MACHINE_CONFIG_START( clpoker )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, XTAL_12MHz / 3) // Z0840004PSC, divider not verified
	MCFG_CPU_PROGRAM_MAP(prg_map)
	MCFG_CPU_IO_MAP(io_map)

	MCFG_NVRAM_ADD_0FILL("nvram") // HY6116ALP-12

	MCFG_DEVICE_ADD("ppi_outputs", I8255, 0) // M5L8255AP-5
	MCFG_I8255_OUT_PORTA_CB(WRITE8(clpoker_state, output_a_w))
	MCFG_I8255_OUT_PORTB_CB(WRITE8(clpoker_state, output_b_w))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(clpoker_state, output_c_w))

	MCFG_DEVICE_ADD("ppi_inputs", I8255, 0) // M5L8255AP-5
	MCFG_I8255_IN_PORTA_CB(IOPORT("INA"))
	MCFG_I8255_IN_PORTB_CB(IOPORT("INB"))
	MCFG_I8255_IN_PORTC_CB(IOPORT("INC"))

	MCFG_TICKET_DISPENSER_ADD("hopper", attotime::from_msec(60), TICKET_MOTOR_ACTIVE_HIGH, TICKET_STATUS_ACTIVE_LOW)

	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60) // wrong
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))  // wrong
	MCFG_SCREEN_SIZE(64*8, 32*8) // wrong
	MCFG_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 32*8-1) // probably right
	MCFG_SCREEN_UPDATE_DRIVER(clpoker_state, screen_update)
	MCFG_SCREEN_PALETTE("palette")
	MCFG_SCREEN_VBLANK_CALLBACK(WRITELINE(clpoker_state, vblank_w))

	MCFG_PALETTE_ADD("palette", 0x100)

	MCFG_DEVICE_PROGRAM_MAP(banks_map)
	MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
	MCFG_ADDRESS_MAP_BANK_DATABUS_WIDTH(8)
	MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000)
	MCFG_DEVICE_ADD("bank3", ADDRESS_MAP_BANK, 0)
	MCFG_DEVICE_PROGRAM_MAP(banks_map)
	MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
	MCFG_ADDRESS_MAP_BANK_DATABUS_WIDTH(8)
	MCFG_ADDRESS_MAP_BANK_STRIDE(0x4000)

	MCFG_RAM_ADD("mainram")
	MCFG_RAM_DEFAULT_SIZE("192K")

	/* the 8048 isn't dumped, so substitute modified real Apple II h/w */
	MCFG_DEVICE_ADD("ay3600", AY3600, 0)
	MCFG_AY3600_MATRIX_X0(IOPORT("X0"))
	MCFG_AY3600_MATRIX_X1(IOPORT("X1"))
	MCFG_AY3600_MATRIX_X2(IOPORT("X2"))
	MCFG_AY3600_MATRIX_X3(IOPORT("X3"))
	MCFG_AY3600_MATRIX_X4(IOPORT("X4"))
	MCFG_AY3600_MATRIX_X5(IOPORT("X5"))
	MCFG_AY3600_MATRIX_X6(IOPORT("X6"))
	MCFG_AY3600_MATRIX_X7(IOPORT("X7"))
	MCFG_AY3600_MATRIX_X8(IOPORT("X8"))
	MCFG_AY3600_SHIFT_CB(READLINE(laser3k_state, ay3600_shift_r))
	MCFG_AY3600_CONTROL_CB(READLINE(laser3k_state, ay3600_control_r))
	MCFG_AY3600_DATA_READY_CB(WRITELINE(laser3k_state, ay3600_data_ready_w))

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_SIZE(256, 256)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 30*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(homerun_state, screen_update_homerun)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", homerun)
	MCFG_PALETTE_ADD("palette", 16*4)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_SOUND_ADD("ymsnd", YM2203, XTAL_20MHz/8)
	MCFG_AY8910_PORT_A_READ_CB(IOPORT("DSW"))
	MCFG_AY8910_PORT_B_WRITE_CB(WRITE8(homerun_state, homerun_banking_w))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( homerun, dynashot )

	/* sound hardware */
	MCFG_SOUND_ADD("d7756", UPD7756, UPD7759_STANDARD_CLOCK)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.75)

	MCFG_SOUND_ADD("samples", SAMPLES, 0)
	MCFG_SAMPLES_CHANNELS(1)
	MCFG_SAMPLES_NAMES(homerun_sample_names)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
MACHINE_CONFIG_END

	DISCRETE_INPUTX_STREAM(NODE_110, 1, 5.0 / 32768, 5.0)   /* Add VRef again */

	DISCRETE_OP_AMP_FILTER(NODE_120, 1, NODE_110, 0, DISC_OP_AMP_FILTER_IS_BAND_PASS_1, &stage1_gravitar_info)
	DISCRETE_OP_AMP_FILTER(NODE_130, 1, NODE_120, 0, DISC_OP_AMP_FILTER_IS_LOW_PASS_1, &stage2_gravitar_info)

	DISCRETE_MIXER2(NODE_290, 1, NODE_100, NODE_130, &gravitar_mixer)
	DISCRETE_OUTPUT(NODE_290, 4096)

DISCRETE_SOUND_END

MACHINE_CONFIG_FRAGMENT( bwidow_audio )
	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_SOUND_ADD("pokey1", POKEY, MASTER_CLOCK / 8) /* C/D3 */
	MCFG_POKEY_ALLPOT_R_CB(IOPORT("DSW0"))
	MCFG_POKEY_OUTPUT_OPAMP(BW_R51, BW_C31, 5.0)
	MCFG_SOUND_ROUTE_EX(0, "discrete", 1.0, 0)

	MCFG_SOUND_ADD("pokey2", POKEY, MASTER_CLOCK / 8) /* B3 */
	MCFG_POKEY_ALLPOT_R_CB(IOPORT("DSW1"))
	MCFG_POKEY_OUTPUT_OPAMP(BW_R47, BW_C32, 5.0)
	MCFG_SOUND_ROUTE_EX(0, "discrete", 1.0, 1)

	MCFG_SOUND_ADD("discrete", DISCRETE, 0)
	MCFG_DISCRETE_INTF(bwidow)

	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)

	//MCFG_QUANTUM_PERFECT_CPU("pokey1")

	MCFG_I8255_OUT_PORTC_CB(WRITE8(aces1_state, ic25_write_c))  // reel write, extra lamp strobe

	// 0xafe0 IC37 - doors, coins, reel optics (reads)
	MCFG_DEVICE_ADD("ic37", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(READ8(aces1_state, ic37_read_a)) // extra lamps
	MCFG_I8255_IN_PORTB_CB(READ8(aces1_state, ic37_read_b)) // meters, extra lamp select
	MCFG_I8255_IN_PORTC_CB(READ8(aces1_state, ic37_read_c)) // reel write, extra lamp strobe

	MCFG_DEFAULT_LAYOUT(layout_aces1)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	// 0xadf0 - Dips, Sound
	MCFG_SOUND_ADD("aysnd", AY8910, 1500000) /* ?? MHz */
	MCFG_AY8910_PORT_A_READ_CB(IOPORT("DSWA"))
	MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSWB"))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)

	/* steppers */
	MCFG_STARPOINT_48STEP_ADD("reel0")
	MCFG_STEPPER_OPTIC_CALLBACK(WRITELINE(aces1_state, reel0_optic_cb))
	MCFG_STARPOINT_48STEP_ADD("reel1")
	MCFG_STEPPER_OPTIC_CALLBACK(WRITELINE(aces1_state, reel1_optic_cb))
	MCFG_STARPOINT_48STEP_ADD("reel2")
	MCFG_STEPPER_OPTIC_CALLBACK(WRITELINE(aces1_state, reel2_optic_cb))
	MCFG_STARPOINT_48STEP_ADD("reel3")
	MCFG_STEPPER_OPTIC_CALLBACK(WRITELINE(aces1_state, reel3_optic_cb))
MACHINE_CONFIG_END

	MCFG_SOFTWARE_LIST_ADD("flop_list","x1_flop")

	MCFG_GENERIC_CARTSLOT_ADD("cartslot", generic_plain_slot, "x1_cart")
	MCFG_GENERIC_EXTENSIONS("bin,rom")

	SPEAKER(config, "x1_l").front_left();
	SPEAKER(config, "x1_r").front_right();
	SPEAKER(config, "pce_l").front_left();
	SPEAKER(config, "pce_r").front_right();

//  SPEAKER(config, "lspeaker").front_left();
//  SPEAKER(config, "rspeaker").front_right();

	/* TODO:is the AY mono or stereo? Also volume balance isn't right. */
	MCFG_DEVICE_ADD("ay", AY8910, MAIN_CLOCK/8)
	MCFG_AY8910_PORT_A_READ_CB(IOPORT("P1"))
	MCFG_AY8910_PORT_B_READ_CB(IOPORT("P2"))
	MCFG_SOUND_ROUTE(0, "x1_l",  0.25)
	MCFG_SOUND_ROUTE(0, "x1_r", 0.25)
	MCFG_SOUND_ROUTE(1, "x1_l",  0.5)
	MCFG_SOUND_ROUTE(2, "x1_r", 0.5)
	WAVE(config, "wave", "cassette").add_route(ALL_OUTPUTS, "x1_l", 0.25).add_route(ALL_OUTPUTS, "x1_r", 0.10);

	MCFG_CASSETTE_ADD("cassette")
	MCFG_CASSETTE_FORMATS(x1_cassette_formats)
	MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_ENABLED)
	MCFG_CASSETTE_INTERFACE("x1_cass")

	MCFG_SOFTWARE_LIST_ADD("cass_list","x1_cass")

	MCFG_TIMER_DRIVER_ADD_PERIODIC("keyboard_timer", x1twin_state, x1_keyboard_callback, attotime::from_hz(250))

	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MCFG_SCREEN_SIZE(64*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(4*8, 60*8-1, 2*8, 30*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(rmhaihai_state, screen_update)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", rmhaihai)

	MCFG_PALETTE_ADD_RRRRGGGGBBBB_PROMS("palette", 0x100)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_SOUND_ADD("aysnd", AY8910, 20000000/16)
	MCFG_AY8910_PORT_A_READ_CB(IOPORT("DSW2"))
	MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSW1"))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.30)

	MCFG_SOUND_ADD("msm", MSM5205, 500000)
	MCFG_MSM5205_PRESCALER_SELECTOR(MSM5205_SEX_4B)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END

static MACHINE_CONFIG_DERIVED( rmhaisei, rmhaihai )

	/* basic machine hardware */

	/* video hardware */
	MCFG_GFXDECODE_MODIFY("gfxdecode", themj)
	MCFG_PALETTE_MODIFY("palette")

}

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", M68705P3, 3579545)
	MCFG_M68705_PORTA_R_CB(READ8(maxaflex_state, mcu_portA_r))
	MCFG_M68705_PORTA_W_CB(WRITE8(maxaflex_state, mcu_portA_w))
	MCFG_M68705_PORTB_W_CB(WRITE8(maxaflex_state, mcu_portB_w))
	MCFG_M68705_PORTC_W_CB(WRITE8(maxaflex_state, mcu_portC_w))

	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))

	/* 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)

void midcoin24cdjuke_state::machine_reset()
{
}


static MACHINE_CONFIG_START( midcoin24cdjuke, midcoin24cdjuke_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80,6000000)         /* ? MHz */
	MCFG_CPU_PROGRAM_MAP(midcoin24cdjuke_map)
	MCFG_CPU_IO_MAP(midcoin24cdjuke_io)
	MCFG_CPU_PERIODIC_INT_DRIVER(midcoin24cdjuke_state, irq0_line_hold, 500)

	MCFG_DEFAULT_LAYOUT(layout_24cdjuke)

	MCFG_DEVICE_ADD("ic11", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(IOPORT("MD1"))
	MCFG_I8255_IN_PORTB_CB(IOPORT("MD2"))
	MCFG_I8255_IN_PORTC_CB(IOPORT("MD3"))

	MCFG_DEVICE_ADD("ic25", I8255A, 0)
	MCFG_I8255_IN_PORTB_CB(IOPORT("PB"))
	MCFG_I8255_IN_PORTC_CB(READ8(midcoin24cdjuke_state, kb_row_r))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(midcoin24cdjuke_state, kb_col_w))

	MCFG_DEVICE_ADD("ic31", I8255A, 0)
	MCFG_I8255_OUT_PORTB_CB(LOGGER("PPI8255 - unmapped write port B", 0))
	MCFG_I8255_IN_PORTC_CB(IOPORT("MD4"))
MACHINE_CONFIG_END


ROM_START( 24cdjuke )

WRITE8_MEMBER(vroulet_state::ppi8255_b_w){}// lamps ?
WRITE8_MEMBER(vroulet_state::ppi8255_c_w){}

/* Machine Driver */

static MACHINE_CONFIG_START( vroulet, vroulet_state )
	// basic machine hardware
	MCFG_CPU_ADD("maincpu", Z80, 4000000)   //???
	MCFG_CPU_PROGRAM_MAP(vroulet_map)
	MCFG_CPU_IO_MAP(vroulet_io_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", vroulet_state,  irq0_line_hold)

	MCFG_NVRAM_ADD_1FILL("nvram")

	MCFG_DEVICE_ADD("ppi8255_0", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(IOPORT("IN0"))
	MCFG_I8255_IN_PORTB_CB(IOPORT("IN1"))
	MCFG_I8255_IN_PORTC_CB(IOPORT("IN2"))

	MCFG_DEVICE_ADD("ppi8255_1", I8255A, 0)
	MCFG_I8255_OUT_PORTA_CB(WRITE8(vroulet_state, ppi8255_a_w))
	MCFG_I8255_OUT_PORTB_CB(WRITE8(vroulet_state, ppi8255_b_w))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(vroulet_state, ppi8255_c_w))

	// video hardware
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MCFG_SCREEN_SIZE(32*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(vroulet_state, screen_update)

	MCFG_SCREEN_SIZE(32*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(gladiatr_state, screen_update_gladiatr)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", gladiatr)
	MCFG_PALETTE_ADD("palette", 1024)

	MCFG_VIDEO_START_OVERRIDE(gladiatr_state,gladiatr)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_SOUND_ADD("ymsnd", YM2203, XTAL_12MHz/8) /* verified on pcb */
	MCFG_YM2203_IRQ_HANDLER(WRITELINE(gladiatr_state, gladiator_ym_irq))
	MCFG_AY8910_PORT_B_READ_CB(IOPORT("DSW3")) /* port B read */
	MCFG_AY8910_PORT_A_WRITE_CB(WRITE8(gladiatr_state, gladiator_int_control_w)) /* port A write */
	MCFG_SOUND_ROUTE(0, "mono", 0.60)
	MCFG_SOUND_ROUTE(1, "mono", 0.60)
	MCFG_SOUND_ROUTE(2, "mono", 0.60)
	MCFG_SOUND_ROUTE(3, "mono", 0.50)

	MCFG_SOUND_ADD("msm", MSM5205, XTAL_455kHz) /* verified on pcb */
	MCFG_MSM5205_PRESCALER_SELECTOR(MSM5205_SEX_4B)  /* vclk input mode    */
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.60)
MACHINE_CONFIG_END

/***************************************************************************

  Game driver(s)

	m_bgtopbank = 0;
}

static MACHINE_CONFIG_START( angelkds, angelkds_state )

	MCFG_CPU_ADD("maincpu", Z80, XTAL_6MHz)
	MCFG_CPU_PROGRAM_MAP(main_map)
	MCFG_CPU_IO_MAP(main_portmap)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", angelkds_state,  irq0_line_hold)

	MCFG_CPU_ADD("sub", Z80, XTAL_4MHz)
	MCFG_CPU_PROGRAM_MAP(sub_map)
	MCFG_CPU_IO_MAP(sub_portmap)

	MCFG_DEVICE_ADD("ppi8255_0", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(IOPORT("I40"))
	MCFG_I8255_IN_PORTB_CB(IOPORT("I41"))
	MCFG_I8255_IN_PORTC_CB(READ8(angelkds_state, angeklds_ff_r)) // or left inputs don't work
	MCFG_I8255_OUT_PORTC_CB(WRITE8(angelkds_state, angelkds_cpu_bank_write))

	MCFG_DEVICE_ADD("ppi8255_1", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(IOPORT("I80"))
	MCFG_I8255_IN_PORTB_CB(IOPORT("I81"))
	MCFG_I8255_IN_PORTC_CB(IOPORT("I82"))

	MCFG_QUANTUM_TIME(attotime::from_hz(6000))

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))

	GFXDECODE_ENTRY( "gfx1", 0, tilelayout1, 0, 16 )    /* only odd color codes are used */
	GFXDECODE_ENTRY( "gfx2", 0, tilelayout2, 0,  4 )    /* only color codes 0 and 3 used */
GFXDECODE_END



static MACHINE_CONFIG_START( iqblock, iqblock_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80,12000000/2) /* 6 MHz */
	MCFG_CPU_PROGRAM_MAP(main_map)
	MCFG_CPU_IO_MAP(main_portmap)
	MCFG_TIMER_DRIVER_ADD_SCANLINE("scantimer", iqblock_state, irq, "screen", 0, 1)

	MCFG_DEVICE_ADD("ppi8255", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(IOPORT("P1"))
	MCFG_I8255_IN_PORTB_CB(IOPORT("P2"))
	MCFG_I8255_IN_PORTC_CB(IOPORT("EXTRA"))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(iqblock_state, port_C_w))

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
	MCFG_SCREEN_SIZE(64*8, 32*8)
	MCFG_SCREEN_VISIBLE_AREA(0*8, 64*8-1, 0*8, 30*8-1)
	MCFG_SCREEN_UPDATE_DRIVER(iqblock_state, screen_update)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_GFXDECODE_ADD("gfxdecode", "palette", iqblock)
	MCFG_PALETTE_ADD("palette", 1024)

	m_char_rom = memregion(Z80_TAG)->base() + 0x5000;
	m_port40 = 0;
}

/* Machine Driver */

static MACHINE_CONFIG_START( phc25, phc25_state )
	/* basic machine hardware */
	MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_4MHz)
	MCFG_CPU_PROGRAM_MAP(phc25_mem)
	MCFG_CPU_IO_MAP(phc25_io)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD(AY8910_TAG, AY8910, 1996750)
	MCFG_AY8910_PORT_A_READ_CB(IOPORT("JOY0"))
	MCFG_AY8910_PORT_B_READ_CB(IOPORT("JOY1"))
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
	MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.15)

	/* devices */
	MCFG_CASSETTE_ADD("cassette")
	MCFG_CASSETTE_FORMATS(phc25_cassette_formats)
	MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_PLAY | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_ENABLED)

	MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_devices, "printer")
	MCFG_CENTRONICS_BUSY_HANDLER(WRITELINE(phc25_state, write_centronics_busy))

	MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", CENTRONICS_TAG)

	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("aysnd", AY8910, 11000000/4)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END


static MACHINE_CONFIG_START( dealer, epos_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", Z80, 11000000/4)    /* 2.75 MHz (see notes) */
	MCFG_CPU_PROGRAM_MAP(dealer_map)
	MCFG_CPU_IO_MAP(dealer_io_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", epos_state,  irq0_line_hold)

	MCFG_DEVICE_ADD("ppi8255", I8255A, 0)
	MCFG_I8255_IN_PORTA_CB(IOPORT("INPUTS"))
	MCFG_I8255_OUT_PORTC_CB(WRITE8(epos_state, write_prtc))

	MCFG_MACHINE_START_OVERRIDE(epos_state,dealer)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
	MCFG_SCREEN_SIZE(272, 241)
	MCFG_SCREEN_VISIBLE_AREA(0, 271, 0, 235)
	MCFG_SCREEN_UPDATE_DRIVER(epos_state, screen_update_epos)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("aysnd", AY8910, 11000000/4)