static int get_lightgun_pos(int player, int *x, int *y)
{
int xpos = readinputportbytag_safe((player == 0) ? "GUN1X" : "GUN2X", -1);
int ypos = readinputportbytag_safe((player == 0) ? "GUN1Y" : "GUN2Y", -1);
if (xpos == -1 || ypos == -1)
return FALSE;
*x = Machine->screen[0].visarea.min_x + xpos * (Machine->screen[0].visarea.max_x - Machine->screen[0].visarea.min_x + 1) / 255;
*y = Machine->screen[0].visarea.min_y + ypos * (Machine->screen[0].visarea.max_y - Machine->screen[0].visarea.min_y + 1) / 255;
return TRUE;
}
static READ16_HANDLER( topspeed_input_bypass_r )
{
UINT8 port = TC0220IOC_port_r(0); /* read port number */
int steer = 0;
int analogue_steer = readinputportbytag_safe(STEER_PORT_TAG,0x00);
int fake = readinputportbytag_safe(FAKE_PORT_TAG,0x00);
if (!(fake & 0x10)) /* Analogue steer (the real control method) */
{
steer = analogue_steer;
}
else /* Digital steer */
{
if (fake & 0x08) /* pressing down */
steer = 0xff40;
if (fake & 0x02) /* pressing right */
steer = 0x007f;
if (fake & 0x01) /* pressing left */
steer = 0xff80;
/* To allow hiscore input we must let you return to
continuous input type while you press up */
if (fake & 0x04) /* pressing up */
steer = analogue_steer;
}
switch (port)
{
case 0x0c:
return steer & 0xff;
case 0x0d:
return steer >> 8;
default:
return TC0220IOC_portreg_r(offset);
}
}
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 rtc_type_t real_time_clock(void)
{
return (rtc_type_t) (int) readinputportbytag_safe("real_time_clock", 0x00);
}
return video_start_generic_bitmapped(machine);
}
/*************************************
*
* Beam position
*
*************************************/
UINT32 amiga_gethvpos(void)
{
UINT32 hvpos = (last_scanline << 8) | (cpu_gethorzbeampos() >> 2);
UINT32 latchedpos = readinputportbytag_safe("HVPOS", 0);
/* if there's no latched position, or if we are in the active display area */
/* but before the latching point, return the live HV position */
if ((CUSTOM_REG(REG_BPLCON0) & 0x0008) == 0 || latchedpos == 0 || (last_scanline >= 20 && hvpos < latchedpos))
return hvpos;
/* otherwise, return the latched position */
return latchedpos;
}
/*************************************
*
* Genlock interaction
