I just installed the new driver from the Prolific web site on my Windows XP > Home system and that works properly now too. I can talk to an EasyProg > directly using the USB to serial converter. > > So this proves (as most of us thought anyway) that RTS/CTS handshaking is > not required by the hardware nor a bug in Hyperterm, just a badly written > and very badly tested driver. Ergo a prudent design should strap the control lines to allow for crummy drivers or limited UARTs. Aza D. Oberman, happily beating a dead horse... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist