Hi,


Erik:

The interrupts are edge (transition) triggered. The guts of ISRs are not necessary to show here, they just normal routines that perform some operations. Saving everything there as PSW is not also required, as every variable is initialized while entering the ISRs.

Peter:

No keys are pressed to cause any interrupt.

Ex0 is from a 555 oscilator at 10 Hz only.

Ex1 is occuring from an interrupt from a DTMF receiver chip that gives out an IRQ on receiving a tone.

So no bouncing required as I think. What you think ??

So what the probelm actually, and why it is solved by changing the line numbers from last to first.......

Simon