>> ... Calculating CRCs by Bits and Bytes", BYTE Magazine, September 1986 It is online in the BYTES Magazine archives ... if this link doesn't work, just search for it on BYTE's site. http://ia701504.us.archive.org/7/items/byte-magazine-1986-09/1986_09_BYTE_11-09_The_68000_Family.pdf Clint Bradford, K6LCS 909-241-7666