>So what is the concensus? Is it possible to program a bootloader >into the 16F877, and do remote code modifications with serial commands? Yes, I've done it. You just can't code-protect it. >I here I was thinking you WERE a teenager! (snicker, snicker) Not for the past 15.5 years, any way. Andy ================================================================== Andy Kunz - www.montanadesign.com - andy@montanadesign.com Life is what we do to prepare for Eternity ==================================================================