Dumitru Stama wrote : > The 4550 model i was talking about is what i > have from 18F family and i was planning to start with that. I will not > do USB for sure for another couple of months. Maybe, just to make the learning a little easier, you could start with a less "full" 18F and write some ASM test progs until you "understand" the architecture. Then it will also be easier to understand what C18 does... Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist