lol ...

Well, they say that one of the best definitions for an interrupt is a telephone. If the phone's ringer was to be replaced with a LED -- you'd have to constantly glance at it once in a while to see if someone was calling you. Arguably, you'd never get any work done (certainly not as much) So, I guess this is comparable to continuously polling an input on a PIC. Here's a thought; could something be used to replace the ringer having an equal or better interrupt effect?