movlw   H'80'           ;; next channel
addwf   ADCON0,f

movlw   H'80'
subwf   ADCON0,f        ;; previous but not below 0th

movlw   H'C7'
andwf   ADCON0,f        ;; 0th

movlw   H'38'
iorwf   ADCON0,f        ;; 7th

Peter (who has not tried this since he is just starting to consider 877s).

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