> Joe,
>     I believe that in C the compiler automatically does that. If I am=20
> wrong about this assumption would someone please let me know?

Sorry, I don't do C myself so can't answer that. I'd be surprised
if it did because it adds instruction cycles to an ISR that may be
or definitely are not needed. That is, some ISRs are required to
be as short and/or reactive as possible

Joe
--=20
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