-----Original Message-----
From: David BALDWIN <db@SDM.BEL.ALCATEL.BE>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Friday, November 21, 1997 11:03
Subject: RRF, BTFSC


>--
>        Sorry,
>
>        I wasn't subscribed properly yesterday and didn't received any
answer
>to my question about
>
>        rrf     w
>        btfsc   w
>
>        It doesn't work! Any idea?


    If you are using the 16cxx(x) series, this doesn't work because you can
only use those two instructions with file registers, w isn't one of those. I
have heard though that the 17cxx can use w like this, I don't know. Best
thing is to do it this way:

;temp is just some file register

        movwf    temp
        rrf        temp, f
        btfsc    temp, bit_you_are_testing

and then I guess if you want to move the result of the rrf, then movf
temp, w. TTYL