Thomas McGahee wrote:
> useful. Please feel free to add additional methods and
> techniques.

How about this:

;6 digit bcd in bcd1:bcd2:bcd3:...(lsb:msb)
;
;
        cblock  0x0c
                tmp
                bcd1:3
        endc

inc_bcd:
        movlw   bcd1
        movwf   FSR
        movlw   3               ;adjust for number of digits
        movwf   tmp
iloop   movlw   0x67
        addwf   INDF
        movlw   0x60
        skpdc
         movlw  0x66
        skpc
         subwf  INDF
        skpz
         goto   iquit
        incf    FSR
        decfsz  tmp
         goto   iloop
iquit   retlw   0


dec_bcd:
        movlw   bcd1
        movwf   FSR
        movlw   3               ;adjust for number of digits
        movwf   tmp
dloop   movlw   1
        subwf   INDF
        addwf   INDF,w
        movlw   0x6
        skpnc
         movlw  0x66
        skpndc
         subwf  INDF
        xorlw   0x66
        skpz
         goto   dquit
        incf    FSR
        decfsz  tmp
         goto   dloop
dquit   retlw   0

The routine can accomodate to any number of BCD digits, just change the
movlw 3.

Reggie