C++ readinputportbytag函数代码示例

static READ8_HANDLER(read_a00x)
{
 switch(offset)
 {
	case 0x02: return reg_a002;
	case 0x04: return readinputportbytag("A004");
  case 0x05: return readinputportbytag("A005");
  case 0x0c: return input_port_0_r(0); // stats / reset
	case 0x0e: return readinputportbytag("A00E");// coin/reset
 }


  if(offset==0x00) //muxed with A002?
  {
    switch(reg_a002&0x3f)
    {
      case 0x3b:
        return input_port_2_r(0);//bet10 / pay out
      case 0x3e:
        return input_port_3_r(0);//TODO : trace f564
      case 0x3d:
      	return input_port_4_r(0);
      default:
        logerror("A000 read with mux=0x%02x\n",reg_a002&0x3f);
    }
  }
  return 0xff;
}

static READ32_HANDLER( analog_port1_r )
{
#if (HACK_TMEK_CONTROLS)
	int pots[4];
	compute_fake_pots(pots);
	return (pots[2] << 24) | (pots[1] << 8);
#else
	return (readinputportbytag("IN6") << 24) | (readinputportbytag("IN7") << 8);
#endif
}

static READ8_HANDLER( triothep_control_r )
{
	switch (trio_control_select) {
		case 0: return readinputportbytag("IN0"); /* Player 1 */
		case 1: return readinputportbytag("IN1"); /* Player 2 */
		case 2: return readinputportbytag("DSW1"); /* Dip 1 */
		case 3: return readinputportbytag("DSW2"); /* Dip 2 */
		case 4: return readinputportbytag("IN2"); /* VBL */
	}

	return 0xff;
}

static READ8_HANDLER( control_data_r )
{
	switch (control_port_select) {
		case 0xfe: return readinputportbytag("IN0"); /* Player 1 */
		case 0xfd: return readinputportbytag("IN1"); /* Player 2 */
		case 0xfb: return readinputportbytag("IN2"); /* Coins */
		case 0xf7: return readinputportbytag("DSW2"); /* Dip 2 */
		case 0xef: return readinputportbytag("DSW1"); /* Dip 1 */
	}

    return 0xff;
}

static UINT16 amiga_read_joy1dat(void)
{
	if ( readinputportbytag("config") & 0x10 ) {
		/* Joystick */
		return readinputportbytag_safe("JOY1DAT", 0xffff);
	} else {
		/* Mouse */
		int input;
		input  = ( readinputportbytag("P1MOUSEX") & 0xff );
		input |= ( readinputportbytag("P1MOUSEY") & 0xff ) << 8;
		return input;
	}
}

static UINT32 astrof_p2_controls_r(void *param)
{
	UINT32 ret;

	/* on an upright cabinets, a single set of controls
       is connected to both sets of pins on the edge
       connector */
	if (readinputportbytag("CAB"))
		ret = readinputportbytag("P2");
	else
		ret = readinputportbytag("P1");

	return ret;
}

static UINT32 tempest_knob_r(void *param)
{
	UINT32 ret;

	if (tempest_player_select)
	{
		ret = readinputportbytag(TEMPEST_KNOB_P2_TAG);
	}
	else
	{
		ret = readinputportbytag(TEMPEST_KNOB_P1_TAG);
	}

	return ret;
}

static UINT32 tempest_buttons_r(void *param)
{
	UINT32 ret;

	if (tempest_player_select)
	{
		ret = readinputportbytag(TEMPEST_BUTTONS_P2_TAG);
	}
	else
	{
		ret = readinputportbytag(TEMPEST_BUTTONS_P1_TAG);
	}

	return ret;
}

static READ16_HANDLER( coin_chip_r )
{
	if (offset == 1)
		return readinputportbytag("COINCHIP");
	logerror("%06x:coin_chip_r(%02x) & %04x\n", activecpu_get_pc(), offset, mem_mask ^ 0xffff);
	return 0xffff;
}

static INTERRUPT_GEN( coin_nmi )
{
	UINT32 coin = readinputportbytag("COIN");
	UINT32 service = readinputportbytag("SERVICE");

	/* both the coin input and the serice credit generates an NMI */
	if (coin || service)
		cpunum_set_input_line(0, INPUT_LINE_NMI, PULSE_LINE);

	/* the coin input is also connected to the coin counter */
	if (coin)
	{
		coin_counter_w(0, 1);
		coin_counter_w(0, 0);
	}
}

INLINE void compute_fake_pots(int *pots)
{
	int fake = readinputportbytag("FAKE");

	pots[0] = pots[1] = pots[2] = pots[3] = 0x80;

	if (fake & 0x01)			/* up */
	{
		if (fake & 0x04)		/* up and left */
			pots[3] = 0x00;
		else if (fake & 0x08)	/* up and right */
			pots[1] = 0x00;
		else					/* up only */
			pots[1] = pots[3] = 0x00;
	}
	else if (fake & 0x02)		/* down */
	{
		if (fake & 0x04)		/* down and left */
			pots[3] = 0xff;
		else if (fake & 0x08)	/* down and right */
			pots[1] = 0xff;
		else					/* down only */
			pots[1] = pots[3] = 0xff;
	}
	else if (fake & 0x04)		/* left only */
		pots[1] = 0xff, pots[3] = 0x00;
	else if (fake & 0x08)		/* right only */
		pots[3] = 0xff, pots[1] = 0x00;
}

static READ8_HANDLER( spacduel_IN3_r )
{
	int res;
	int res1;
	int res2;

	res1 = readinputportbytag("IN3");
	res2 = readinputportbytag("IN4");
	res = 0x00;

	switch (offset & 0x07)
	{
		case 0:
			if (res1 & IN_SHIELD) res |= 0x80;
			if (res1 & IN_FIRE) res |= 0x40;
			break;
		case 1: /* Player 2 */
			if (res2 & IN_SHIELD) res |= 0x80;
			if (res2 & IN_FIRE) res |= 0x40;
			break;
		case 2:
			if (res1 & IN_LEFT) res |= 0x80;
			if (res1 & IN_RIGHT) res |= 0x40;
			break;
		case 3: /* Player 2 */
			if (res2 & IN_LEFT) res |= 0x80;
			if (res2 & IN_RIGHT) res |= 0x40;
			break;
		case 4:
			if (res1 & IN_THRUST) res |= 0x80;
			if (res1 & IN_P1) res |= 0x40;
			break;
		case 5:  /* Player 2 */
			if (res2 & IN_THRUST) res |= 0x80;
			break;
		case 6:
			if (res1 & IN_P2) res |= 0x80;
			break;
		case 7:
			res = (0x00 /* upright */ | (0 & 0x40));
			break;
	}

	return res;
}

static MACHINE_RESET( aquarium )
{
    UINT16 *RAM = (UINT16 *)memory_region(REGION_CPU1);
    int data = readinputportbytag("FAKE");

    /* Language : 0x0000 = Japanese - Other value = English */

    RAM[0x000a5c/2] = data;

}

static int cidelsa_in_ef(void)
{
	/*
        EF1     CDP1869 _PRD
        EF2     Test
        EF3     Coin 2
        EF4     Coin 1
    */

	return (cdp1869_prd & 0x01) + (readinputportbytag("EF") & 0xfe);
}

static READ16_HANDLER( horekid_IN2_r )
{
	int data = readinputportbytag("IN1");

	if (!(data & 0x40))		// FAKE button 3 for "Debug Mode"
	{
		data &=  0x40;
		data |= ~0x30;
	}

	return data;
}