Robin Abbott wrote:
>
> Yes this is quite hard.
Indeed, this was the most confusing part when I learned PIC's.
> X!=Y      Z=1
 Z=0?
> Hope this helps! (Mind you it would have been easier if Microchip had simply
> put the logic in Hardware to "correct" the carry flag after a subtraction !
>
The way I remember the "incorrect" carry bit, is I tell myself that when
I do subtraction, Carry is already set incase I need it, so it clears
when I use it, but stay there if I don't.

A bit of reverse logic.
:)
Quentin