I have just gotten my eyes up for macros, but there are a couple of
questions I'd like to ask you:

> ; Do a long call across address boundries
> _call   macro   Routine_Label

What does the Rutine_Label do? I used macros without them, but I heard that
a macro could be more powerfull if used this way shown here. Why is that?

> _CallCounter  += 1

What does the above line do?

>         movlw   high Routine_Label      ;set upper address byte

I think I know what this line does, but I'm not sure, so please correct me
if I'm wrong: It moves the high byte (pclath) of the adress where
Routine_Label is actually located to w.

>         movwf   PCLATH
>         call    Routine_Label
>         movlw   high Call_Return_Point#v(_CallCounter)  ;reset PCLATH
>         movwf   PCLATH

Hmmm... I thought that these instructions (talking 'bout the two latter
lines above) had to be done in the subroutine (called Routine_Label in this
example). Is this because it is in a macro, or what? I guess that the
(incredible long, however,) label below is put in just to have a reference
when reseting pclath. Is this right?

> Call_Return_Point#v(_CallCounter):
>         endm

BTW, I'm sorry for all the questions guys, but I cannot take it when there
is something I don't understand. I HAVE to find out how it works, no matter
the subject :-) Not _knowing_ is ok with me in many cases, but not
_undestanding_ is more than I can bear.

Stig

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Stig Brautaset - mailto:sbrautas@c2i.net - ICQ:11052183
Student of electronics  -  http://home.c2i.net/sbrautas
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