Xref: utzoo comp.unix.questions:15721 comp.unix.xenix:7151 Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!uunet!wuarchive!texbell!vector!chip From: chip@vector.Dallas.TX.US (Chip Rosenthal) Newsgroups: comp.unix.questions,comp.unix.xenix Subject: Re: Using the DigiComm multi-port board with SCO Xenix Message-ID: <687@vector.Dallas.TX.US> Date: 16 Aug 89 21:15:42 GMT References: <963@lakesys.UUCP> <1104@ispi.UUCP> <65@nstar.UUCP> Reply-To: chip@vector.Dallas.TX.US (Chip Rosenthal) Followup-To: comp.unix.xenix Organization: Dallas Semiconductor Lines: 28 Keywords: Multi-port board, DigiComm, use with SCO Xenix {{{ followups redirected to comp.unix.xenix, where this seems to belong }}} In article <65@nstar.UUCP> root@nstar.UUCP (Larry Snyder) writes: >Is the difference between the smart boards and "dumb" boards really that >noticable under SCO Xenix? Absolutely, positively, yes. I run a line printing server on my serial lines, and connect the serial lines to DOS peecees. To the peecees, it looks as if there is a Laserjet sitting on the end of the COM port, but it is actually a XENIX box spooling stuff to the printer. I prototyped the server with a dumb COM card, found it extremely prone to losing characters, right down to 2400bps. The reason is that the serial connection is the usual three-line, with no flow control. The problem disappeared when I implemented it with a smart card. I run it at 9600bps reliably, even on a heavily loaded machine. I haven't tried faster only because the DOS end doesn't support it. BTW...I'm using a Digiboard for this, and am extremely happy with it. I don't know if their board is the best thing on the market technically. In fact, mine is a crufty, old COM/8i. But the clincher has been my experiences with their support folks. I have found them to be very responsive, and their support policy is great (basically, free support). -- Chip Rosenthal / chip@vector.Dallas.TX.US / Dallas Semiconductor / 214-450-5337 "I wish you'd put that starvation box down and go to bed" - Albert Collins' Mom