In a message dated 98-03-12 17:01:32 EST, you write:

<<
 The difference between Motorola (at least the 68000-series) and PIC
 is that a Motorola processor has different priorities on the
 interrupts. One interrupt can interrupt another so to speak. On a PIC
 only one interrupt at a time is allowed to execute. If an interrupt
 is triggered when the PIC is already in the interrupt service routine
 the PIC waits for the retfie instruction before this interrupt is
 processed. There is a way around this of you enable the global
 interrupt bit at the beginning of the ISR, but this leads to code
 that is very hard to debug and there can be effects which are hard to
 predict.

 Danjel McGougan >>

Perhaps so, but the question was weather it could be done, not if it should be
done!!

Dave Duley