Benoit wrote:

>I'd like to use the internal pull-up features on 16X84
>for RB4-7 inputs.


Try this, I used this code in a 4X4 keypad:)


 BSF  STATUS,RP0 ;SWITCH TO BANK 1
 MOVLW B'11111111' ;MAKE PORTB
 MOVWF TRISB  ;ALL INPUTS

 BCF  OPTREG,RBPU ;ENABLE WEAK PULLUPS
 BCF  STATUS,RP0 ;SWITCH TO BANK 0

More code examples at www3.mistral.co.uk/brian.clewer

Brian.