> You might want to look at Microchip application note AN716, > "Migrating Designs from PIC16C74A/74B to PIC18C442": Thanks, that was a quick overview of the difference, just what I wanted. I don't have a C-compiler yet. So maybe I should just forget about the 16F877 and goto the 18F452 instead... I just won't be able to try C on the 12F6xx or 16F628... Adi -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads