I've written a small assembly-code in MPLAB and simulate it. I open a
watch-window (View->Watch) and add a couple of symbols and SFRs. To
change the values, I simply double-click it and type in a new one.
Works fine, except for PORTA. No matter which value I try to set in
PORTA, it returns to the initial zero. Does this have something to do
with that I've set MCLRE in the config word to zero, or what's the
reason?

Snippets of my initialization code:

__CONFIG _CP_OFF & _WDT_ON & _BODEN_ON & _PWRTE_ON & _ER_OSC_CLKOUT &
_MCLRE_OFF & _LVP_ON

[...]

start
        bsf     STATUS, RP0                      ; select bank1 for
configuration of TRISA/TRISB
        bcf     STATUS, RP1
        movlw   b'00000111'                      ; RA[0:2] inputs (switches)
        movwf   TRISA                            ; RA[3:7] outputs
(number for active LED)

        movlw   b'00000000'                      ; RB[0:7] outputs
(LED-segments)
        movwf   TRISB
        bcf     STATUS, RP0                      ; switch back to bank0

At first I thought it was because bits 0:2 are set to input ports and
that the simulator will block any values coming to it, so I just tried
to change the upper bits in the register. But alas, same problem.


-- 
- Rikard.
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