>Quite plain and simple, my question is what are the commands SKPNC and SKPZ?
>I see they are used in this macro but what do they do?  I don't see them on
>any of my data sheets!


It's a typical redefinition of "btfsc STATUS,C" and "btfss STATUS,Z", it
makes it easier to remember which way skips and which way doesn't.

Cheers, Bob