Hi, Can someone tell me what's instruction set test? It is supposed to be the execution of a set of instructions to verify if the result of the instructions match a known value. If it doesn't, it indicates the program has corrupted. This is all I know; but I need more details. Can someone kindly fill in more details? Thanks in advance, Tony -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads