I want to use the interupt on change feature of portB of the PIC16C84 to
read a key pad.

Because the '84 has a number of interupt sources (and only one ISR
address: org 4) I guess the first part of the ISR work out which
interupt has occured and then execute the relevant code.

How is this usually done?


--
Seth Fischer
Auckland, New Zealand