Hi List, I have a requirement to perform a check sum. I sort of understand what that means, but am pretty much in the dark. The sentence in the manual says "The tail of the message consists of two character checksum (hexadecimal notation) followed by a carriage return then a line feed. The checksum consists of the byte-wise exclusive OR of all bytes in the message" Can someone help me working out the "...byte-wise exclusive OR of all bytes in the message" A typical message looks like $PMGNCMD,VERSION* followed by the check sum of the message, which in this case is 28 and includes the $ and the *. Thanks very much for your help David _______________________________________________________ More mailing list info http://www.geosoft.com/support/listserv/index.html List Archive http://www.mail-archive.com/gxnet@lists.geosoft.com
