> Here are some parts of my code:

Hi Jens, I don't see any bank switching in that code

eg what I'd expect

banksel PORTA ; porta I/O in bank0
movlw B'00000000' ; PORTA values
movwf PORTA

banksel TRISA ; porta DDR in bank1
movlw B'00111111' ; PORTA directions
movwf TRISA

etc

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