>My point was that the carry bit has nothing to do
>with the *acualy used* instruction in the code, rlncf.

Yes, and I did not reply to that point, which I do take note of.

>In the lines after (that you snipped) I *did* say that
>you instead has to deal with the MSB of the rotated byte.
>(Which probably will be much less "unknown" then the C bit.)

And yes I noticed that too, although I took it as meaning that if the MSB is
set, then you lose it into the carry, and in your code that case is not
taken care of (i.e. W > 127)

>I also showed the possibility of adding W with itself
>on the 18-series, so you don't need the separate temp
>variable (as in Alan's method). (I hope it works ! :-) )

Not sure, not having used the 18 series yet, so have not looked closely at
the instruction set. However as W is also available as WREG, is it possible
to add WREG to W thereby avoiding the temp var?

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