My experience with a dual-boot computer (Fedora 9 and Windoze XP) with a relay toggled by the RTS line: Windoze fiddles with the RTS line while booting, Fedora 9 doesn't. de AJ4TF -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-and-VB6-tp7593796p7593833.html Sent from the Elecraft mailing list archive at Nabble.com.