> I finally broke down and wrote a macro
> that pushes PCLATH values on my own PCLATH stack,
> up to 8 deep.  It's some tens of lines long, which
> makes me anxious about it being used too much as
> a macro.
> ...
> What's the best way to handle this situation?

What I do is not require subroutines to preserve PCLATH.  I have a bunch of
macros that deal with this and related issues.  See STD.INS.ASPIC at
http://www.embedinc.com/pic.  The GCALL (Global CALL) marcro sets PCLATH
before a call, then restores it to the current page after the return.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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