Thus spake Cesarz, Peter J (GEA, 068974) (PETER.CESARZ@APPL.GE.COM):

> Apparently I've got to first SET the zero bit PRIOR to performing a move
> operation?  What I noticed is that ANY operation, zero or not, with
> instructions like MOVF, or DECF will CLEAR the zero bit!

Not true. There must be something else you're doing that is making
this seem to happen. What about posting a code fragment for the
vultures to pick over?

> Any advice on how to check a register for zero?  It seems like such a
> silly question, but I haven't been successful at it yet.

Just do something like this:

        if(x == 0)

oops, you probably wanted assembler code! Try this then:

        movf    _x,f
        btfss   3,2
        goto    elsewhere
;       get here if x is zero

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