> Bingo! Thanks Tony & Jinx. Li'l PIC monkeys'll get you any way they can eh ? I shouldn't have been such a shrinking violet about it after you'd said you have timer IRQs happening. Your ISR routine for those is obviously picking up the EEIF and going off into parts unknown. Where you clear EEIF is up to you, as long as you avoid the problem you just had. It wouldn't be a bad idea to keep the bcf inside the EE routine. If you can't predict when the timer IRQ will come then you should bcf as soon as you don't need the EEIF anymore > I believe Tony is in Aus, Tony also believes he's in Australia > but are you in that corner of the planet Jinx? Or are > you in the US like I am and just have no life? :-) Lifeless in New Zealand (just across the Sydney Harbour Bridge) -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics