Jinx,

>I don't need speed in this particular application, as each bit is
>held for 1ms, but I'd be interested in a quicker method for future
reference

How about this...

do_byte  movwf   temp0           ;save data byte
         movlw   .8
         movwf   cnt0            ;8 bits per byte

         clrf    manch_lo        ;
         clrf    manch_hi

man_loop movlw   1               ;assume we need a 01 pattern
         rlf     temp0           ;test bit
         skpnc                   ;is the bit set?
         movlw   2               ;yes, need a 10 pattern

         iorwf   manch_lo        ;combine with other bits

         rlf     manch_lo        ;make room for next time
         rlf     manch_hi
         rlf     manch_lo
         rlf     manch_hi

dec_loop decfsz  cnt0            ;do for 8 bits
         goto    man_loop

Warning, this code is not tested.  I wrote this while watching the
Cowboys-Redskins game.

Kelly Kohls, N5TLE
Bedford, TX

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