> > Some weeks ago, I wrote to the Piclist because I needed help > > about asynchronous interrupt. You said to me that the 18's family > > has 2 levels of interrupt, but unfortunately, there is a bug with > > that feature which have been fixed very recently. Forgive me if I have missed something in the earlier thread, but I have an entire product line that uses multiple interrupt priorities on PIC18's. (see http://www.auto-serv.com/products/index.php3 ) We here are in doubt that this ever was a real bug and have been using this feature for 2+ years w/o any problems. This has been our experience with 18C & F 2's & 4's. I have an excess of C442's in PLCC44 if that's of any help. I might even have a few F452's in TQFP, but these can be had just about anywhere - I buy from a myriad of vendors and have never had a problem, although I have limited experience with 18F/C2's. I do seem to recall these also running the same priority interrupts well also though....... CHris -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.