bogoc68_t mfp_nextinterrupt(const mfp_t * const mfp)
{
const mfp_timer_t * itimer = find_next_int(mfp);
const bogoc68_t bogoc =
(!itimer) ? IO68_NO_INT : itimer->cti;
return bogoc;
}
bogoc68_t mfp_nextinterrupt(const mfp_t * const mfp, const bogoc68_t bogoc)
#endif
{
const mfp_timer_t * itimer = find_next_int(mfp);
#ifdef _MSC_VER
const bogoc68_t bogoc = (!itimer) ? IO68_NO_INT : itimer->cti;
#endif
return bogoc;
}
interrupt68_t * mfp_interrupt(mfp_t * const mfp, const bogoc68_t bogoc)
{
mfp_timer_t * itimer;
/* Better recheck which timer interrupts coz previous
interrupt code may have modified timer.
*/
while ((itimer = find_next_int(mfp)) && itimer->cti < bogoc) {
/* Have a candidate */
mfp_timer_t * const ptimer = itimer;
/* Process interruption. */
timer_interrupt(mfp,ptimer);
#ifndef _MFPIO68_SUPER_EMUL_
/* ======================== */
/* Simple Emulation Version */
/* ======================== */
if (mfp->map[0x07+ptimer->def.channel] &
mfp->map[0x13+ptimer->def.channel] &
ptimer->def.bit )
{
++ptimer->int_fall;
return &ptimer->interrupt;
}
#else
/* ========================== */
/* Accurate Emulation Version */
/* ========================== */
/* Test Interrupt Enable */
if ( mfp->map[0x07+ptimer->channel] & ptimer->bit ) {
/* Set Interrupt Pending Bit */
mfp->map[0x0B+ptimer->channel] |= ptimer->bit;
/* Test Interrupt In Service */
if (!(mfp->map[0x0F+ptimer->channel]&ptimer->bit)) {
/* SEI : Set Interrupt In Service */
if (SEI) mfp->map[0x0B+ptimer->channel] |= ptimer->bit;
/* Test Interrupt Mask */
if (mfp->map[0x13+ptimer->channel] & ptimer->bit) {
++ptimer->int_fall;
return &ptimer->interrupt;
}
}
}
#endif
/* For some reason interruption was cancelled. */
++ptimer->int_mask;
}
return 0;
}