Hi all,

"Paul B. Webster VK2BZC" wrote:
>   Pick another register as pointer, let's call it "ptr".
>
>         clrc
>         movlw   1
>         btfsc   ptr,1
>         movlw   4
>         movwf   mask
>         btfsc   ptr,0
>         rlf     mask,F
>         btfsc   ptr,2
>         swapf   mask,F  ; or W if you need that

>   Concept not original, copied from Dimitry amongst others.

I think the original version (1 cycle less) goes like this:

        movlw   1
        btfsc   ptr,1
        movlw   4
        movwf   mask

        btfsc   ptr,0
        addwf   mask,f

        btfsc   ptr,2
        swapf   mask,f

The 'rlf' is replaced with an 'addwf' thus 'clrc' is not needed
anymore.  I had also posted a 32 bit version last week for the led bar
solution.  I copied the technique for a part.  The code is also found on
the website below.

regards,
Reggie

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