Here's what I'm trying to accomplish: I have a loop set-up where the only time the program can come out of the loop is when Port A bit 0 OR RA0 goes low. It then makes other pins go high and/or low to make a certain number out of a seven segment dieplay. What I thought is that I could just make the PIC do this on the fly where when RA0 goes low the program will instantly come out of the loop and continue on with the code. What you're describing is that when the pin goes low you would have to store that informaiton into ram and then retrive the data so that the PIC can compare the two results, as in the IF...Than statement. I"m assuming that you're correct since you're all over this forum! I'm just trying to learn how to do certain things rather than being told how to do it, and not learning anything! I really appreicate you helping me out.