Or, on the 18-series :

Cross-wiring two ports gives a 4 cycle solution:

        movff   REG,PORTB       ; two cycles
        movff   PORTC,REG       ; two cycles

Same code space, same # of cycles, but just two
instruction...

Jan-Erik.

Michael Rigby-Jones wrote:

> Cross-wiring two ports gives a 4 cycle solution:
>
>        movf    REG,w           ; one cycle
>        movwf   PORTB           ; one cycle
>        movf    PORTC,w ; one cycle
>        movwf   REG             ; one cycle

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