Peter L. Peres wrote:
> 1. I am testing a project that must be developed on 16f84 and finally run
> on 16C54 and 12C508.

That sounds a bit silly.  If it's going to run on a 16C54 (are you really
sure, that's a *really* old PIC), it would make sense to test on 16C54-JW or
the emulator.  As for the 12C508 (completely obsoleted by 12C508A by the
way), it even has a different CPU core with different restrictions than the
16F84.  Why not use a 12F629 instead of the 12C508?

Now that I think about it, don't the 16C5x parts also have the 12 bit core?
I'm not totally sure because I've never used a PIC that ancient.  Is this
for a museum?

> I use IFDEF switches in relevant parts of the code.
> While doing this I naively wrote:
>
>         list p=p16c54a, l=inhx32, r=hex
>         include 'p16c5x.inc'
>
> which I thought would define __16C54

No, it defines __16C54A.

> so I could later write:
>
>   IFDEF __16C54
>         DT "16C54" ; etc etc
>   ENDIF
>
> except __16C54 is not defined outside p16c5x.inc . Huh ?

__16C54 isn't defined at all.  In any case these symbols are defined by the
assembler as a result of the processor selection.  Their scope is certainly
not limited to the Microchip include files.

> mplab, mpasm, and
> gpasm faithfully duplicate this behavior. Is this a bug or am I missing
> something.

Which behavior?  Again, I don't understand why you expect the __16C54 symbol
to be defined for the 16C54A processor.  You've gotten yourself confused
here somehow and are misinterpreting the symptoms.

> I now do:
>
> CPU__16C54 EQU 1
> ; CPU__16F84 EQU 1
>
>   IFDEF CPU__16C54
>         list p=...
>         include ...
>   ENDIF
>
> and it works. But it took a while to understand this.

Well, yeah, that should work.  I would still key off the assembler's built
in symbols though.


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