Yes, as long as your ISRs are not extremely time consuming. If you make the serial ISR just store/fetch a byte (that is the RIGHT way) set that ISR at high priority and you will be fine. If you are operating at a relatively low baud rate, the priority should be unimportant. If you are mucking about with a lot of interrupt disables/handlers it is advisable that you use a derivative with double buffered SBUF that gives you byte time rather than bit time to react to the serial interrupt.

Erik

Erik