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Path: utzoo!utgpu!romwa
From: romwa@utgpu.UUCP
Newsgroups: comp.unix.xenix
Subject: Re: Com3: and Com4:
Message-ID: <1987Dec1.085828.19648@gpu.utcs.toronto.edu>
Date: Tue, 1-Dec-87 08:58:28 EST
Article-I.D.: gpu.1987Dec1.085828.19648
Posted: Tue Dec  1 08:58:28 1987
Date-Received: Fri, 4-Dec-87 02:08:39 EST
References: <164@illusion.UUCP>
Organization: University of Toronto Computing Services
Lines: 33
Checksum: 15189
Summary: Com3: and Com4: Internal modems and Xenix: Don't

In article <164@illusion.UUCP>, marcus@illusion.UUCP (Marcus Hall) writes:
> References:
> 
> 
> I am running SCO Xenix 2.1.3 and have two serial ports on my system with an
> external modem hanging off of tty1A.  I am considering getting an internal
> 2400 bps modem since I would like to use tty1A for another terminal (tty2A
> is currently in this use as well).  If I get a modem that can be configured
> as com3: or com4: in the ms-dos world, can the Xenix tty driver grok it?
> Would there be collisions with interrupt usage or something?  If I get a
> multi-port card, will that work in adition to the two ports I have now?
> 
> Thanks..
> 
> Marcus Hall
> ..!{ihnp4,mcdchg}!illusion!marcus



I have never considered using an internal modem on XENIX.  You
immediately lose the flexibility of the serial ports by
getting a modem with a fixed address.  What's wrong with an
external box--they are certainly cheap enough these days.

Unless you know which multiport card you want, there is no way
of knowing if there will be any conflicts with other hardware.
Consensys' multiport card does not use interrupts so it is
unlikely there would be a hardware conflict.  At any rate,
save yourself the worry and get an external modem.

Mark T. Dornfeld
Royal Ontario Museum
utgpu!rom!mark