The INT_RETI: example is what I was looking for. Thanks. On the Motorola HC11, I can accomplish the same by setting the global interrupt enable flag while inside an ISR. I once had to do that too to run a very time consuming task that needed to be processed in a very precise manner. So what I did is to call the task from a timer interrupt, but enables global interrupt before I do so. So that other interrupts can still be served while this long task is ran.

Thanks

Andy