Hello John.

> > Another variant.
> >
> >         movfw   scanbit
> >         addwf   scanbit,f
> >         skpnz
> >         bsf     scanbit,0
> >
> > After this W contain previous scan and scanbit contain next scan.
>
> Hmm... this has the same problem that the first four-cycler given before
> had: if scanbit holds something other than a power of two, running the
> routine repeatedly won't fix that.  On the other hand, looking at mine
> above it's just plain broken.  Sigh.  Maybe too much egg nog.

Put any value to scanbit and excute my code up to 8 times.
I think you will see recovering :-)

WBR Dmitry.