Am I right in believing from the existing literature that the checksum=20 toolbar in MPLAB is a sum of program memory and configuration bits,=20 excluding EEPROM data? I'm attempting to use the checksum feature to hopefully identify which=20 version of code is in one type of PIC, where the version sticker has=20 fallen off. Cheers Matt --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .