In message  <32A25DCC.1E3F@bytecraft.com> PICLIST@MITVMA.MIT.EDU writes:
> > >
> > >The article is in Scott Edward's April 1996 "Stamp Applications" of Nuts &
> > >Volts.
> > >
> > >In it, Scott shows the section of code:
> > >
> > >  again:
> > >   b1 = b1 + 1                  ;  increment b1
> > >   toggle 0                     ;  toggle pin 0
> > >   goto again
> > >
[much snipping]
> One of our other compilers surprised me with the following code sequence
>  equivalent.
>
>
>       movlw  0x01                   ;  Setup Pin to Toggle
> again
>       xorwf  PORTB                  ;  toggle pin 0
>       goto   again
>
> The missing increment was caused by a default non-volitile variable that was
>  never
> again referenced in the program. Its value did not matter.
>

Walter,

If it wasn't the MPC compiler, which one was it?

Regards,



Mike Watson