> I just tried this and it seems as though the method I used is OK. In
MPLAB,
> I set the zero bit in STATUS and then executed a MOVF STATUS,W. The zero
> bit was clear in STATUS after the MOVF but the W register held the
> unmodified value of STATUS.

Maybe it worked in the simulator, but why deliberately invite problems at
the edge of the architecture?  I didn't see your code, but you still have
to restore STATUS at the end of the interrupt.  Using a SWAPF for both the
save and restore uses no more cycles and is much surer to work.

I've got a tried and tested interrupt service routine template,
QQQ_INTR.ASPIC, at http://www.embedinc.com/pic.  All the save/restore is
done for you.  All you have to do it plunk in the guts of your interrupt
service code.


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