> 2 - Use one of the newer 18F parts that doesn't have the interrupt > priority bug. According to your advices and Lyle's ones, I think I'll consider 18F458. Apparently, there is no priority bug. The only things which differ from the 18F452 (only talking about modules I use) is that there is no more CPP2, but a ECCP1. > Sorry I couldn't be more helpful. Please, don't say that. You have already helped me a lot : you personaly replied to all my questions since I'm wrting to Piclist. Eventually, you have helped me to find the solution for my interrupt problem. Thanks to you, Olin, and all the others who helped me. Laurent Haniken -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body