>
> Let's assume you're using PORTA bits 0 and 1 (and you stated no other
> pins mattered).
> You could use swapf and do it in two instructions (if PORTA is
> initialized as shown below):
>
> ;Initialize PORTA with 0x21 (or 0x12).
>
> btfss bigreg,7
> swapf PORTA
>

Also, keep in mind "read-modify-write" issues.
--=20
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