static READ8_HANDLER( videopin_misc_r )
{
double plunger = calc_plunger_pos();
// The plunger of the ball shooter has a black piece of
// plastic (flag) attached to it. When the plunger flag passes
// between the first section of the optical coupler, the MPU
// receives a non-maskable interrupt. When the flag passes
// between the second section of the optical coupler, the MPU
// calculates the time between the PLUNGER1 and PLUNGER2
// signals received. This results in the MPU displaying the
// ball being shot onto the playfield at a certain speed.
UINT8 val = readinputport(2);
if (plunger >= 0.000 && plunger <= 0.001)
{
val &= ~1; /* PLUNGER1 */
}
if (plunger >= 0.006 && plunger <= 0.007)
{
val &= ~2; /* PLUNGER2 */
}
return val;
}
static READ8_HANDLER( mgolf_misc_r )
{
double plunger = calc_plunger_pos(); /* see Video Pinball */
UINT8 val = readinputport(3);
if (plunger >= 0.000 && plunger <= 0.001)
{
val &= ~0x20; /* PLUNGER1 */
}
if (plunger >= 0.006 && plunger <= 0.007)
{
val &= ~0x40; /* PLUNGER2 */
}
return val;
}
static READ8_HANDLER( mgolf_misc_r )
{
double plunger = calc_plunger_pos(space->machine); /* see Video Pinball */
UINT8 val = input_port_read(space->machine, "61");
if (plunger >= 0.000 && plunger <= 0.001)
{
val &= ~0x20; /* PLUNGER1 */
}
if (plunger >= 0.006 && plunger <= 0.007)
{
val &= ~0x40; /* PLUNGER2 */
}
return val;
}