Steve Hardy wrote:
>
> > From: Tjaart van der Walt <tjaart@WASP.CO.ZA>
> >
> > A simple solution is to use a MPASM address for a label. Right shift it
> > 8 times, and load it into PCLATH. You can even make a macro out of it :
> >
> > Fix_up_PCLATH MACRO
> >         local   Local_Label
> > Local_Label
> >         movlw   ((Local_Label>>8)&&0xFF)
> >         movwf   PCLATH
> >         ENDM
> >
> > Now all you have to do after returning from a unknown address location,
> > is "Fix_up_PCLATH"
> >
> > It uses two words of ROM, but saves your sanity.
>
> Unfortunately, it also destroys W which forces subroutines to return
> results in registers.  There are plenty of solutions.  How about the
> following untested macro for general calls.  No doubt Andrew Warren et
> al. have something similar in their web pages, but this is my 5 cents
> worth (sorry, Oz doesn't have 2 cents any more - inflation, you know).
>

Your are right about it destroying W. However, sometimes that doesn't
matter much. I usually use it before table reads.

Talking about cents.... At R7.50 to the Quid and R4.50 to the UD$, we
are HOPING for inflation (ouch!)

--
Friendly Regards

Tjaart van der Walt
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