Philippe Paternotte wrote: > If you use movff you don't change flags nor BSR... True, but you will have installed a very nasty lurking low probability bug in your ISR. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist