Aubrey McIntosh, Ph.D. wrote :

> Does banksel always generate two instructions on the
> 16F877?

I think so. I'd guess (if MPASM is smart enough)
one instruction on two page PICs and two instructions
on four page PICs.

> Is there a
> clever way have a macro generate only the minimum number of
> instructions?

Yes, Olins DBANKIF macros does that. Note that you must have a
system of assembler symbols to keep track of the current
bank settings, and in some cases you can't now what the
settings are (such as after an "entry point"). That's where Olins
macro UNBANK comes into play. UNBANK removes all
assumptions of bank settings so the next DBANKIF always
creates the bcf/bsf instructions.

>  I have thought of a design that compiles the
> .lkr file into
> an include file that cooperates with the macros, but I haven't gone
> anywhere with it.

You must also have a list of all FSR with information on which
FSR goes into which bank, I think.

One idea could be to download Olins environmet and learn from
his work :-)

(Don't know about PAGESEL...)

Jan-Erik.

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