Justin Richards wrote:
>=20
> I now find that I must use banksel directives everywhere because I do
> not know if the compiler has put the GPR I am referencing in the same
> bank as a special purpose register I am referencing.
>=20
> For example
>=20
> 	banksel		PORTB
> 	movfw		PORTB
> 	banksel		shadow
> 	movwf		shadow

For an often-accessed variable, such as a shadow register, you can place it
in a UDATA_SHR section (shared GPRs), instead of UDATA.  Then you don't nee=
d
the banksel before accessing it.

Of course, you can only do that for a limited number of variables, but by
using shared memory for your most commonly accessed variables, you can cut
down on the need for banksel quite significantly.


Cheers,
David Meiklejohn
www.gooligum.com.au



--=20
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