>What happens to PCLATH? If the interrupt occurrs when PCLATH is non-zero,
>having been set by the code prior to a goto, is PCLATH unchanged?
>
>If so, will a GOTO executed by the interrupt service routine apply PCLATH
>in computing the address (baaddd thing?)?

Yep.

>On interrupt, does one need to save PCLATH and set it to whatever is
>appropriate for the ISR, then restore it when exiting the ISR?

Yep.

Andy

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Andy Kunz               Life is what we do to prepare for Eternity
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