On Sat, 2006-04-29 at 15:01 -0700, Bob Axtell wrote: > Its in the PICLIST archive. You want CRC-16. I believe Scott Dattalo has > a nice clean routine. I have a few optimized CRC routines: http://www.dattalo.com/technical/software/pic/crc.php Scott -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist