On Mon, 20 Mar 2000 00:46:49 +1100, you wrote:

>At 12:58 AM 3/19/00 -0500, you wrote:
>
>
>
>
>This is what I use for my 17Cxx programmer that also has the i/o lines
>swapped. This is optimized for space but is considerably slower than
>other solutions. However it is up to you to decide your priorities.
>
>;**************************************
>;SPIN
>;enter byte to reverse in abuff.
>;exit with reversed byte in bbuff
>;KnownZero must be zero of course. Code will leave knownZero as 0
>
>;(Do NOT use with interrupt driven code that may use KnownZero!)
>
>
>               bsf KnownZero,3  ;count = 8
>yyr6           rrf abuff
>               rlf bbuff
>               decfsz KnownZero
>               goto yyr6
>
>Jim

.. or if you're short of registers, how about this : 
  movlw 080
  movwf dest
 
loop
   rlf src
  rrf dest
  skpc ; loop until marker bit falls out the end
  goto loop