自学教程：C++ DEVCB_INPUT_PORT函数代码示例

/* Graphics Decode Information */static GFXDECODE_START( aquarius )	GFXDECODE_ENTRY( "gfx1", 0x0000, aquarius_charlayout, 0, 256 )GFXDECODE_END/***************************************************************************    MACHINE DRIVERS***************************************************************************/static const ay8910_interface aquarius_ay8910_interface ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("RIGHT"),	DEVCB_INPUT_PORT("LEFT"),	DEVCB_NULL,	DEVCB_NULL};static const cassette_config aquarius_cassette_config ={	cassette_default_formats,	NULL,	(cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_MUTED),	NULL};static MACHINE_CONFIG_START( aquarius, aquarius_state )	/* basic machine hardware */

	{ 8, 12, 0, 4 },	{ 3, 2, 1, 0, 19, 18, 17, 16},	{ 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32 },	8*8*4};#endifstatic GFXDECODE_START( dfruit )	GFXDECODE_ENTRY( "gfx1", 0, bg2_layout, 0, 16 )	GFXDECODE_ENTRY( "gfx1", 0, sp2_layout, 0, 16 )	//GFXDECODE_ENTRY( NULL,           0, char_layout,  0, 16 )  // Ram-basedGFXDECODE_ENDstatic I8255A_INTERFACE( ppi8255_intf ){	DEVCB_INPUT_PORT("IN0"),						/* Port A read */	DEVCB_NULL,			/* Port A write */	DEVCB_INPUT_PORT("IN1"),		/* Port B read */	DEVCB_NULL,						/* Port B write */	DEVCB_INPUT_PORT("IN2"),			/* Port C read */	DEVCB_NULL						/* Port C write */};TIMER_DEVICE_CALLBACK_MEMBER(dfruit_state::dfruit_irq_scanline){	int scanline = param;	if (scanline == 240 && (m_irq_enable & 4))	{		m_maincpu->set_input_line_and_vector(0, HOLD_LINE, m_irq_vector[2]);	}

	GFXDECODE_ENTRY( "gfx1", 0x0000, charlayout,   0, 64 )	GFXDECODE_ENTRY( "gfx1", 0x0000, spritelayout, 0, 64 )GFXDECODE_END/************************************* * *  Sound interfaces * *************************************/static const ay8910_interface ay8912_interface_1 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("SYSTEM"),	DEVCB_NULL,	DEVCB_NULL,	DEVCB_NULL};static const ay8910_interface ay8912_interface_2 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("INPUTS"),	DEVCB_NULL,	DEVCB_NULL,	DEVCB_NULL};

	BZONEADJINPUT_PORTS_END/************************************* * *  Sound interfaces * *************************************/static const pokey_interface bzone_pokey_interface ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("IN3")};static const pokey_interface redbaron_pokey_interface ={	{ DEVCB_NULL },	DEVCB_HANDLER(redbaron_joy_r)};/************************************* * *  Machine driver *

	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON6        ) PORT_PLAYER(1)	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON4        ) PORT_PLAYER(2)	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON5        ) PORT_PLAYER(2)	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON6        ) PORT_PLAYER(2)INPUT_PORTS_END/***************************************************************************    Machine Drivers***************************************************************************/static I8255A_INTERFACE( lordgun_ppi8255_0_intf ){	DEVCB_INPUT_PORT("DIP"),            /* Port A read */	DEVCB_DRIVER_MEMBER(lordgun_state,fake_w),              /* Port A write */	DEVCB_NULL,                         /* Port B read */	DEVCB_DRIVER_MEMBER(lordgun_state,lordgun_eeprom_w),    /* Port B write */	DEVCB_INPUT_PORT("SERVICE"),        /* Port C read */	DEVCB_DRIVER_MEMBER(lordgun_state,fake2_w)              /* Port C write */};static I8255A_INTERFACE( lordgun_ppi8255_1_intf ){	DEVCB_INPUT_PORT("START1"),         /* Port A read */	DEVCB_DRIVER_MEMBER(lordgun_state,fake_w),              /* Port A write */	DEVCB_INPUT_PORT("START2"),         /* Port B read */	DEVCB_DRIVER_MEMBER(lordgun_state,fake_w),              /* Port B write */	DEVCB_INPUT_PORT("COIN"),           /* Port C read */	DEVCB_DRIVER_MEMBER(lordgun_state,fake_w)               /* Port C write */

static GFXDECODE_START( runaway )	GFXDECODE_ENTRY( "gfx1", 0x000, runaway_tile_layout,   0, 1 )	GFXDECODE_ENTRY( "gfx1", 0x800, runaway_sprite_layout, 8, 1 )GFXDECODE_ENDstatic GFXDECODE_START( qwak )	GFXDECODE_ENTRY( "gfx1", 0x800, qwak_tile_layout,   0, 1 )	GFXDECODE_ENTRY( "gfx1", 0x000, qwak_sprite_layout, 0, 1 )GFXDECODE_ENDstatic const pokey_interface pokey_interface_1 ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("6008")};static const pokey_interface pokey_interface_2 ={	{		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r),		DEVCB_HANDLER(runaway_pot_r)	}};

	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2) PORT_8WAY	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2) // used to get test modeINPUT_PORTS_ENDINTERRUPT_GEN_MEMBER(hotblock_state::hotblocks_irq)/* right? */{	device.execute().set_input_line(INPUT_LINE_NMI, PULSE_LINE);}static const ay8910_interface ay8910_config ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("P1"),	DEVCB_INPUT_PORT("P2"),	DEVCB_NULL,	DEVCB_NULL};static MACHINE_CONFIG_START( hotblock, hotblock_state )	/* basic machine hardware */	MCFG_CPU_ADD("maincpu", I8088, 10000000)	MCFG_CPU_PROGRAM_MAP(hotblock_map)	MCFG_CPU_IO_MAP(hotblock_io)	MCFG_CPU_VBLANK_INT_DRIVER("screen", hotblock_state,  hotblocks_irq)	/* video hardware */

}WRITE8_MEMBER(toypop_state::out_coin1){	coin_counter_w(machine(), 1, ~data & 1);}WRITE8_MEMBER(toypop_state::flip){	flip_screen_set(data & 1);}/* chip #0: player inputs, buttons, coins */static const namcoio_interface intf0_coin ={	{ DEVCB_INPUT_PORT("COINS"), DEVCB_INPUT_PORT("P1_RIGHT"), DEVCB_INPUT_PORT("P2_RIGHT"), DEVCB_INPUT_PORT("BUTTONS") },	/* port read handlers */	{ DEVCB_DRIVER_MEMBER(toypop_state,out_coin0), DEVCB_DRIVER_MEMBER(toypop_state,out_coin1) },		/* port write handlers */	NULL	/* device */};static const namcoio_interface intf0 ={	{ DEVCB_INPUT_PORT("COINS"), DEVCB_INPUT_PORT("P1_RIGHT"), DEVCB_INPUT_PORT("P2_RIGHT"), DEVCB_INPUT_PORT("BUTTONS") },	/* port read handlers */	{ DEVCB_NULL, DEVCB_NULL },					/* port write handlers */	NULL	/* device */};/* chip #1: dip switches */static const namcoio_interface intf1 ={	{ DEVCB_DRIVER_MEMBER(toypop_state,dipA_h), DEVCB_DRIVER_MEMBER(toypop_state,dipB_l), DEVCB_DRIVER_MEMBER(toypop_state,dipB_h), DEVCB_DRIVER_MEMBER(toypop_state,dipA_l) },	/* port read handlers */	{ DEVCB_DRIVER_MEMBER(toypop_state,flip), DEVCB_NULL },						/* port write handlers */

                                Sand Scorpion***************************************************************************//* YM3014B + YM2203C */static void irq_handler(device_t *device, int irq){	cputag_set_input_line(device->machine(), "audiocpu", 0, irq ? ASSERT_LINE : CLEAR_LINE);}static const ym2203_interface ym2203_intf_sandscrp ={	{		AY8910_LEGACY_OUTPUT,		AY8910_DEFAULT_LOADS,		DEVCB_INPUT_PORT("DSW1"), /* Port A Read */		DEVCB_INPUT_PORT("DSW2"), /* Port B Read */		DEVCB_NULL,	/* Port A Write */		DEVCB_NULL,	/* Port B Write */	},	irq_handler	/* IRQ handler */};static const kaneko_pandora_interface sandscrp_pandora_config ={	"screen",	/* screen tag */	0,	/* gfx_region */	0, 0	/* x_offs, y_offs */};

    PIA 5 = U7: (never actually used, mapped to $2000 on the sound CPU)        port A = unused        port B = sound CPU to TMS5220 communication        CA1 = interrupt signal from TMS5220        CA2 = write signal to TMS5220        CB1 = ready signal from TMS5220        CB2 = read signal to TMS5220        IRQA = /SINT2 signal        IRQB = /SINT2 signal***************************************************************************/const pia6821_interface qix_pia_0_intf ={	DEVCB_INPUT_PORT("P1"),		/* port A in */	DEVCB_INPUT_PORT("COIN"),	/* port B in */	DEVCB_NULL,		/* line CA1 in */	DEVCB_NULL,		/* line CB1 in */	DEVCB_NULL,		/* line CA2 in */	DEVCB_NULL,		/* line CB2 in */	DEVCB_NULL,		/* port A out */	DEVCB_NULL,		/* port B out */	DEVCB_NULL,		/* line CA2 out */	DEVCB_NULL,		/* port CB2 out */	DEVCB_NULL,		/* IRQA */	DEVCB_NULL		/* IRQB */};const pia6821_interface qix_pia_1_intf ={

	AM_RANGE(0x880a, 0x880a) AM_READ_PORT("SYSTEM")	AM_RANGE(0x880b, 0x880b) AM_READ_PORT("P2")	AM_RANGE(0x880c, 0x880c) AM_READWRITE(chaknpop_gfxmode_r, chaknpop_gfxmode_w)	AM_RANGE(0x880d, 0x880d) AM_WRITE(coinlock_w)												// coin lock out	AM_RANGE(0x9000, 0x93ff) AM_RAM_WRITE(chaknpop_txram_w) AM_BASE_MEMBER(chaknpop_state, tx_ram)			// TX tilemap	AM_RANGE(0x9800, 0x983f) AM_RAM_WRITE(chaknpop_attrram_w) AM_BASE_MEMBER(chaknpop_state, attr_ram)		// Color attribute	AM_RANGE(0x9840, 0x98ff) AM_RAM AM_BASE_SIZE_MEMBER(chaknpop_state, spr_ram, spr_ram_size)	// sprite	AM_RANGE(0xa000, 0xbfff) AM_ROM	AM_RANGE(0xc000, 0xffff) AM_RAMBANK("bank1")														// bitmap plane 1-4ADDRESS_MAP_ENDstatic const ay8910_interface ay8910_interface_1 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("DSWA"),		// DSW A	DEVCB_INPUT_PORT("DSWB"),		// DSW B	DEVCB_NULL,	DEVCB_NULL};static const ay8910_interface ay8910_interface_2 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_NULL,	DEVCB_NULL,	DEVCB_HANDLER(unknown_port_1_w),	// ??	DEVCB_HANDLER(unknown_port_2_w)	// ??};

static MACHINE_START(merit){	slotcarn_state *state = machine.driver_data<slotcarn_state>();	state->m_ram_palette = auto_alloc_array(machine, UINT8, RAM_PALETTE_SIZE);	state_save_register_global_pointer(machine, state->m_ram_palette, RAM_PALETTE_SIZE);}/****************************************       PPI 8255 (x3) Interfaces       ****************************************/static const ppi8255_interface scarn_ppi8255_intf[3] ={	{	/* A, B & C set as input */		DEVCB_INPUT_PORT("IN0"),	/* Port A read */		DEVCB_INPUT_PORT("IN1"),	/* Port B read */		DEVCB_INPUT_PORT("IN2"),	/* Port C read */		DEVCB_NULL,					/* Port A write */		DEVCB_NULL,					/* Port B write */		DEVCB_NULL					/* Port C write */	},	{	/* A set as input */		DEVCB_INPUT_PORT("DSW1"),	/* Port A read */		DEVCB_NULL,					/* Port B read */		DEVCB_NULL,					/* Port C read */		DEVCB_NULL,					/* Port A write */		DEVCB_NULL,					/* Port B write */		DEVCB_NULL					/* Port C write */	},	{	/* A & B set as input */

	PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )INPUT_PORTS_END/***************************************************************************  Machine Config***************************************************************************/static I8255A_INTERFACE( ppi8255_0_intf ){	// $4008 - always $83 (PPI mode 0, ports B & lower C as input)	DEVCB_NULL,                         /* Port A read */	DEVCB_DRIVER_MEMBER(kungfur_state,kungfur_output_w),    /* Port A write */	DEVCB_INPUT_PORT("IN0"),            /* Port B read */	DEVCB_NULL,                         /* Port B write */	DEVCB_INPUT_PORT("IN1"),            /* Port C read */	DEVCB_DRIVER_MEMBER(kungfur_state,kungfur_control_w)    /* Port C write */};static I8255A_INTERFACE( ppi8255_1_intf ){	// $400c - always $80 (PPI mode 0, all ports as output)	DEVCB_NULL,                         /* Port A read */	DEVCB_DRIVER_MEMBER(kungfur_state,kungfur_latch1_w),    /* Port A write */	DEVCB_NULL,                         /* Port B read */	DEVCB_DRIVER_MEMBER(kungfur_state,kungfur_latch2_w),    /* Port B write */	DEVCB_NULL,                         /* Port C read */	DEVCB_DRIVER_MEMBER(kungfur_state,kungfur_latch3_w)     /* Port C write */};

{	set_led_status(machine(), 0, data & 1);	set_led_status(machine(), 1, data & 2);	coin_lockout_global_w(machine(), data & 4);	coin_counter_w(machine(), 0, ~data & 8);}WRITE8_MEMBER(gaplus_state::out_lamps1){	coin_counter_w(machine(), 1, ~data & 1);}/* chip #0: player inputs, buttons, coins */static const namcoio_interface intf0 ={	{ DEVCB_INPUT_PORT("COINS"), DEVCB_INPUT_PORT("P1"), DEVCB_INPUT_PORT("P2"), DEVCB_INPUT_PORT("BUTTONS") },	/* port read handlers */	{ DEVCB_NULL, DEVCB_NULL },		/* port write handlers */	NULL	/* device */};static const namcoio_interface intf0_lamps ={	{ DEVCB_INPUT_PORT("COINS"), DEVCB_INPUT_PORT("P1"), DEVCB_INPUT_PORT("P2"), DEVCB_INPUT_PORT("BUTTONS") },	/* port read handlers */	{ DEVCB_DRIVER_MEMBER(gaplus_state,out_lamps0), DEVCB_DRIVER_MEMBER(gaplus_state,out_lamps1) },		/* port write handlers */	NULL	/* device */};/* chip #1: dip switches */static const namcoio_interface intf1 ={	{ DEVCB_INPUT_PORT("DSWA_HIGH"), DEVCB_INPUT_PORT("DSWB_LOW"), DEVCB_INPUT_PORT("DSWB_HIGH"), DEVCB_INPUT_PORT("DSWA_LOW") },	/* port read handlers */

WRITE8_MEMBER(albazg_state::yumefuda_output_w){    coin_counter_w(machine(), 0, ~data & 4);    coin_counter_w(machine(), 1, ~data & 2);    coin_lockout_global_w(machine(), data & 1);    //data & 0x10 hopper-c (active LOW)    //data & 0x08 divider (active HIGH)    flip_screen_set(~data & 0x20);}static const ay8910_interface ay8910_config ={    AY8910_LEGACY_OUTPUT,    AY8910_DEFAULT_LOADS,    DEVCB_INPUT_PORT("DSW1"),    DEVCB_INPUT_PORT("DSW2"),    DEVCB_DRIVER_MEMBER(albazg_state,yumefuda_output_w),    DEVCB_NULL};static const mc6845_interface mc6845_intf ={    "screen",	/* screen we are acting on */    8,			/* number of pixels per video memory address */    NULL,		/* before pixel update callback */    NULL,		/* row update callback */    NULL,		/* after pixel update callback */    DEVCB_NULL,	/* callback for display state changes */    DEVCB_NULL,	/* callback for cursor state changes */    DEVCB_NULL,	/* HSYNC callback */

	PORT_BIT( 0x0001, IP_ACTIVE_LOW,  IPT_BUTTON6  ) PORT_NAME("PRINTER READY")	PORT_BIT( 0x0002, IP_ACTIVE_LOW,  IPT_COIN1    )	PORT_BIT( 0x0008, IP_ACTIVE_LOW,  IPT_COIN2    )	PORT_START("DSW3")	PORT_BIT( 0x0002, IP_ACTIVE_LOW,  IPT_COIN3    )	PORT_BIT( 0x0008, IP_ACTIVE_LOW,  IPT_COIN4    )	PORT_BIT( 0x0080, IP_ACTIVE_LOW,  IPT_BUTTON7  ) PORT_NAME("LOW BATT U51")INPUT_PORTS_END/***************************************************************************/static const duartn68681_config nevada_duart18_68681_config ={	DEVCB_DRIVER_LINE_MEMBER(nevada_state, duart18_irq_handler),	DEVCB_NULL,	DEVCB_NULL,	DEVCB_INPUT_PORT("DSW1"),	DEVCB_NULL};/***************************************************************************/static const duartn68681_config nevada_duart39_68681_config ={	DEVCB_DRIVER_LINE_MEMBER(nevada_state, duart39_irq_handler),	DEVCB_NULL,	DEVCB_NULL,	DEVCB_INPUT_PORT("DSW2"),	DEVCB_NULL};/***************************************************************************/static const duartn68681_config nevada_duart40_68681_config ={	DEVCB_DRIVER_LINE_MEMBER(nevada_state, duart40_irq_handler),

}static void via_irq( running_device *device, int state ){	// from gameplan.c	/* Kaos sits in a tight loop polling the VIA irq flags register, but that register is       cleared by the irq handler. Therefore, I wait a bit before triggering the irq to       leave time for the program to see the flag change. */	timer_set(device->machine, ATTOTIME_IN_USEC(50), NULL, state, via_irq_delayed);}static const via6522_interface via_1_interface ={	/*inputs : A/B         */ DEVCB_INPUT_PORT("IN0"), DEVCB_INPUT_PORT("IN1"),	/*inputs : CA/B1,CA/B2 */ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL,	/*outputs: A/B         */ DEVCB_NULL, DEVCB_NULL,	/*outputs: CA/B1,CA/B2 */ DEVCB_NULL, DEVCB_NULL, DEVCB_HANDLER(trvquest_coin_w), DEVCB_NULL,	/*irq                  */ DEVCB_NULL};static const via6522_interface via_2_interface ={	/*inputs : A/B         */ DEVCB_INPUT_PORT("UNK"), DEVCB_INPUT_PORT("DSW"),	/*inputs : CA/B1,CA/B2 */ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL,	/*outputs: A/B         */ DEVCB_NULL, DEVCB_NULL,	/*outputs: CA/B1,CA/B2 */ DEVCB_NULL, DEVCB_NULL, DEVCB_HANDLER(trvquest_misc_w), DEVCB_NULL,	/*irq                  */ DEVCB_LINE(via_irq)};

static GFXDECODE_START( irobot )    GFXDECODE_ENTRY( "gfx1", 0, charlayout, 64, 16 )GFXDECODE_END/************************************* * *  Sound interfaces * *************************************/static const pokey_interface pokey_config ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("DSW2")};/************************************* * *  Machine driver * *************************************/static MACHINE_CONFIG_START( irobot, irobot_state )	/* basic machine hardware */	MCFG_CPU_ADD("maincpu", M6809, MAIN_CLOCK/8)	MCFG_CPU_PROGRAM_MAP(irobot_map)

static const ay8910_interface ay8910_re900 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_DRIVER_MEMBER(re900_state,re_psg_portA_r),	DEVCB_DRIVER_MEMBER(re900_state,re_psg_portB_r),	DEVCB_DRIVER_MEMBER(re900_state,re_mux_port_A_w),	DEVCB_DRIVER_MEMBER(re900_state,re_mux_port_B_w)};static const ay8910_interface ay8910_bs94 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("IN0"),	DEVCB_INPUT_PORT("IN1"),	DEVCB_NULL,	DEVCB_NULL};/****************************      Machine Driver      ****************************/static MACHINE_CONFIG_START( re900, re900_state )	/* basic machine hardware */	MCFG_CPU_ADD("maincpu", I8051, MAIN_CLOCK)	MCFG_CPU_PROGRAM_MAP(mem_prg)	MCFG_CPU_IO_MAP(mem_io)

	GFXDECODE_ENTRY( "gfx1", 0, charlayout,     0,  1 )	GFXDECODE_ENTRY( "gfx2", 0, spritelayout,  32,  1 )GFXDECODE_END/************************************* * *  Sound interfaces * *************************************/static const pokey_interface pokey_interface_1 ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("START"),};static const pokey_interface pokey_interface_2 ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("DSW"),};/************************************* * *  Machine driver * *************************************/

	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED )	PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED )INPUT_PORTS_END/************************************* * *  Sound interfaces * *************************************/static const pokey_interface pokey_interface_1 ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("DSW0")};static const pokey_interface pokey_interface_2 ={	{ DEVCB_NULL },	DEVCB_INPUT_PORT("DSW1")};/************************************* * *  Machine drivers *

	freekick_state *state = device->machine().driver_data<freekick_state>();	return state->memregion("user1")->base()[state->m_romaddr & 0x7fff];}static const ppi8255_interface ppi8255_intf[2] ={	{		DEVCB_NULL,							/* Port A read */		DEVCB_NULL,							/* Port B read */		DEVCB_HANDLER(snd_rom_r),			/* Port C read */		DEVCB_HANDLER(snd_rom_addr_l_w),	/* Port A write */		DEVCB_HANDLER(snd_rom_addr_h_w),	/* Port B write */		DEVCB_NULL							/* Port C write */	},	{		DEVCB_INPUT_PORT("DSW1"),			/* Port A read */		DEVCB_INPUT_PORT("DSW2"),			/* Port B read */		DEVCB_INPUT_PORT("DSW3"),			/* Port C read */		DEVCB_NULL,							/* Port A write */		DEVCB_NULL,							/* Port B write */		DEVCB_NULL							/* Port C write */	}};/************************************* * *  Graphics definitions * *************************************/

	state->m_cpua_ctrl = 0xff;	state->m_ioc220_port = 0;	state->m_banknum = -1;	state->m_adpcm_pos = 0;	state->m_adpcm_data = -1;}static const pc080sn_interface topspeed_pc080sn_intf ={	1,	 /* gfxnum */	0, 8, 0, 0	/* x_offset, y_offset, y_invert, dblwidth */};static const tc0220ioc_interface topspeed_io_intf ={	DEVCB_INPUT_PORT("DSWA"), DEVCB_INPUT_PORT("DSWB"),	DEVCB_INPUT_PORT("IN0"), DEVCB_INPUT_PORT("IN1"), DEVCB_INPUT_PORT("IN2")	/* port read handlers */};static const tc0140syt_interface topspeed_tc0140syt_intf ={	"maincpu", "audiocpu"};static MACHINE_CONFIG_START( topspeed, topspeed_state )	/* basic machine hardware */	MCFG_CPU_ADD("maincpu", M68000, 12000000)	/* 12 MHz ??? */	MCFG_CPU_PROGRAM_MAP(topspeed_map)	MCFG_CPU_VBLANK_INT("screen", topspeed_interrupt)

	PORT_BIT( 0x03, 0x00, IPT_PEDAL ) PORT_MINMAX(0x00, 0x02) PORT_SENSITIVITY(10) PORT_KEYDELTA(1) //gas pedal	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )	PORT_BIT( 0x20, IP_ACTIVE_LOW,  IPT_TILT )	//PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON1 ) //gas1	//PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_BUTTON2 ) //gas2	PORT_START("WHEEL") /* 0xDx30 DRIVING_WHEEL */	PORT_BIT( 0xff, 0x00, IPT_DIAL ) PORT_MINMAX(0x00, 0xff) PORT_SENSITIVITY(50) PORT_KEYDELTA(8)INPUT_PORTS_ENDstatic const ay8910_interface ay8910_interface_1 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("DSWA"),	DEVCB_INPUT_PORT("DSWB"),	DEVCB_NULL,	DEVCB_NULL};static const ay8910_interface ay8910_interface_2 ={	AY8910_LEGACY_OUTPUT,	AY8910_DEFAULT_LOADS,	DEVCB_INPUT_PORT("DSWC"),	DEVCB_INPUT_PORT("DSWD"),	DEVCB_NULL,	DEVCB_NULL};

	PORT_DIPSETTING(    0x00, DEF_STR( On ) )	PORT_BIT( 0xc0, IP_ACTIVE_HIGH, IPT_UNUSED )INPUT_PORTS_END/* machine driver */WRITE_LINE_MEMBER(sbugger_state::sbugger_interrupt){	m_maincpu->set_input_line(I8085_RST75_LINE, state ? CLEAR_LINE : ASSERT_LINE );}static I8156_INTERFACE(i8156_intf){	// all ports set to input	DEVCB_INPUT_PORT("INPUTS"),	DEVCB_NULL,	DEVCB_INPUT_PORT("DSW1"),	DEVCB_NULL,	DEVCB_INPUT_PORT("DSW2"),	DEVCB_NULL,	DEVCB_DRIVER_LINE_MEMBER(sbugger_state,sbugger_interrupt)};static MACHINE_CONFIG_START( sbugger, sbugger_state )	MCFG_CPU_ADD("maincpu", I8085A, 6000000)        /* 3.00 MHz??? */	MCFG_CPU_PROGRAM_MAP(sbugger_map)	MCFG_CPU_IO_MAP(sbugger_io_map)	MCFG_I8156_ADD("i8156", 200000, i8156_intf)     /* freq is an approximation */