Dear Piclist: I have a problem using 16C621 A parts. I finished development w/ F84's now I'm converting to the '621 and checking out the code. I added a step to set the CMCON register to 0x05 (all digital comparators). It works great with my emulator (ICE2000 w/ PCM16XC0), but when I program them individually, they seem to get stuck somewhere after initialization of RAM, ports and option register and before the main code. Any thoughts? Thanks, Tim Crist Tri-tronics -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.