> >But if you have NO goto's and no computed
> >goto's (look-up tables and the like) in your ISR code, PCLATH does not
need
> >to get altered and therefore does not need to get saved.
>
> This is true, but can be dangerous if you want to add to your code at a
> later date and forget about PCLATH, thinking to yourself "I've already got
> my context saving taken care of."  You might be better off saving
everything
> properly from the start.
>

Also, NO CALLS.

And I have found this useful in a couple of applcations where every cycle is
critical. And of course it is pretty easy for a GOTO to sneak its way into
your ISR.

Bob Ammerman
RAm Systems

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