> Yes, the sample was for 18F452.
>
> I understand that the hardware must read the port to being
> able to execute
> the xor. Would this be a problem?

It can be a problem when you do the operation on the PORT register. It
will *not* be a problem when you do the opearation on the LAT register
(available on PIC18's only).

Wouter van Ooijen

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consultancy, development, PICmicro products

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