Do any of the common serial communication handshaking schemes involve = just the transmit and receive lines? I would like to get my two devices working "in harmony" and take turns = transmitting. I would like to be able to use standard terminals and terminal emulators = so I would like to stick to a standard format if one exists. Thanks John -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.