Hi,
use
        COMF    TANKOD,F
or
        COMF    PORTB,W
        MOVWF   TANKOD

I hope this helps.
Imre


On Mon, 3 May 1999, Andreas Magnusson wrote:

> Hello all!
>
> I have a problem. I am programming a PIC. In the program I load a value from p
ortb to the register TANKOD. The value from portb tell me wich button that is pr
essed down on a keypad. If button 3 is pressed, 3 will be the value of portb.
>
> My problem is that the keypad use "negative logic" or something like that. A 0
 is a 1 and a 1 is a 0. So i want to invert the register.
>
> 11111100    =>    00000011
>
>
> Any Idea how I can do this in a easy way.
>
>
> Tnx    /Andreas Magnusson
>