Brendan Moran wrote:
>
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> > Actually it is. You store the new pins in an XORed
> > form. :o) But there is a problem that your code below
> > still takes 9 cycles (once goto is included).
> >
> >         ;-------------------------
> >                                 ; now output current2
> >         movf current2,w         ;
> >         movwf PORTB             ; send to motor!
> >        nop
> >        movf   inputs_last,w
> >        xorwf  PORTA,w
> >        movwf  diff
> >        skpz
> >        goto pwm_loop
> >
> >
> > > What is your're trying to do?
>
> So drop the NOP


Whoops! Me stupid! Sorry Scott and Brendan etc, in my
rush to criticize I forgot that the PORTA read is NOT
the next instruction after the nop.

So it seems to be done, with Scott's solution needing
no work and only two extra cycles upon exit to give
the required "inputs" variable. I can live with that.
:o)
-Roman

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