Byron Jeff wrote: > The lookup table is perfect for a convert a nybble to its reverse. > Only 16 words. Plus the instructions do the table lookup. It only take 8 RRF/RLF instructions to flip 4 bits algorithmically. ******************************************************************** 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