>> In fact, many people develop on the '87x and then drop down to cheaper chips after the code is working. Just so you're careful to limit yourself to the features of your eventual target chip. << for example: F87x's have 10 bit a/d's, while C7x's (drop-in replacements) have 8 bit a/d's -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.