> If you're not doing anything in the main line then everything is fine > but if you need to do any kind of real work in the main line then > you shouldn't be sloppy about your interrupt handler one could say you shouldn't ever be sloppy ;-)) I did say "largely irrelevant". Each project must be assessed on its merits. For some projects time management is critical, for others not so critical. If even well-managed necessary tasks are causing a particular micro to run out of processing power then dot dot dot wbr -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist