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/********************************************************************
* interrupt service routine, 1 msec Timer 2 interrupts *
********************************************************************/
/* *
* beep task produces a 500 Hz 'beep' with 1 msec interrupts *
* */
if(beepctr) // if beep task running
{ porta ^= 1 << spkr; // toggle speaker pin
beepctr--; // decrement msec counter
}
No sucess to convert it to run in 628A...