John Considine wrote:

> I am trying to have a variable be decremented and that result be used
> as the BTFSC test bit

  This is a VFAQ.  There is no bit pointer function on the PIC or AFAIK
*any* microcontroller.

  Tony's reply noted; but I suspect you don't really need, possibly
even want, to read PORTB each time.  Would this not do?:

    movlw   8
    movwf   TestBit         ; count from 8
    movf    PORTB,W
    movwf   shiftr          ; copy of PORTB
nexbit:
    btfsc   shiftr,7        ; test MSB
    goto    bitset          ; the bit denoted by TestBit is set
    rlf     shiftr          ; roll the bits
    decfsz  TestBit,F       ; look at next bit
    goto    nexbit
noneset:                    ; fall through if none set.

bitset:                     ; the bit denoted by TestBit is set

  If you use 0 and 1 rather than W and F for the "destination" you are
really *asking* for trouble!
--
  Cheers,
        Paul B.