David VanHorn wrote: > You can connect N RS232 devices together in a ring topology, if the software supports it. > > Basically: > Each message has the form of > > You send your message to a recipient, and mark yourself as the source. > You pass on any messages that aren't for you. > You receive any messages that are for you. > > You swallow any messages you sent. > They've gone around the ring once. You might need to do something else as the recipient is apparently asleep or gone or ? > > For bonus points, configure the hub so that unplugged devices are bypassed automatically (relay on CTS?) You're bringing back nightmares of a network that used MAU's that weren't "smart" and really really big network connectors, Dave... and it ran at 4Mb/s... Nate Duehr, nate@natetech.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.