I'm working on a routine for the 16c84. This routine, using indirect
addressing, modifies a GPR's bit. The code is:

              movf   BYTENRO,W          ; BYTENRO is the GPR address
              movwf  FSR                ; indirect addresing
              movf   BITNRO,W           ; bit to modify
              call   Tabla_1
              iorwf  INDF,1             ; bit_number OR INDF( BYTENRO's
; content )
              goto   somewhere_else
Tabla_1       addwf  PCL,1
              retlw  1                  ; bit number 0
              retlw  2                  ; bit number 1
              retlw  4                  ; bit number 2
              retlw  8                  ; bit number 3
              retlw  10                 ; bit number 4
              retlw  20                 ; bit number 5
              retlw  40                 ; bit number 6
              retlw  80                 ; bit number 7

My question is: Does the instruction "iorwf  INDF,1" updates the contents
of BYTENRO???
If it doesn't I must add "movwf  INDF"

I simulated the code with MPSim and PICSim (by DR. C.E. Wick). MPSim tells
me BYTENRO is not update; PICSim tells me it does.
I do not know which is the rigth way. Please, tell me if I am explicit
enough in this post. I hope you help me work it out.

TIA

Carlos Betancourt
CETI-UNET
Venezuela