From: PHAST::GORDON 27-NOV-1987 20:02 To: PHAST::MANAGER Subj: RE: I apparently never tested sending two zero bytes through CRC routine... Sending the zero bytes through was necessary with your old routine because it worked strangely. Mine works differently, and it will work right only if you don't send the zeros. On receive, sending the received CRC and checking for zero is equivalent to not sending it through, then comparing received and calculated CRCs. Gordon