In a message dated 98-06-09 18:12:21 EDT, you write: << Nichole, Something is probably clobbering the FSR. If this is the case, you need to keep a local copy of the FSR in another register and swap it back when the routine is active. By the same token, you MIGHT want to save the FSR contents before swapping so you can swap the original contents back before continuing your multitasking! Otherwise the FSR problem will just migrate over to the other routine. Whenever you multitask, use local copies of things that might get clobbered. Hope this helps. Fr. Tom McGahee >> I believe your right. Could you show me an example of how to do this?