> >What do you think I might have to watch out for? Will the assembly > >code for the 16F device work straight away on the 18F device? > > I haven't done any 16 to 18 series conversions, but my understanding > is the answer is "Depends Physically they are fairly similar S/w though....(sucks air through teeth) RLF -> RLCF / RLNCF etc GOTO $ Banking CONFIG FSR Many little details like those. Depending on how many little details are in the original code, you could be in for a little bit of typing I migrated from the 877 to the 452 and to the 4520. Nothing wrong with anything "pre-18F" but 18F or better are so much easier to work with -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist