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From: marcus@illusion.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Using com3 & com4 in an AT
Message-ID: <166@illusion.UUCP>
Date: Fri, 4-Dec-87 11:29:30 EST
Article-I.D.: illusion.166
Posted: Fri Dec  4 11:29:30 1987
Date-Received: Tue, 8-Dec-87 03:43:44 EST
Reply-To: marcus@illusion.UUCP (Marcus Hall)
Distribution: na
Organization: Magic Numbers Software, Bloomingdale, IL
Lines: 16


I have an AT clone which is running Xenix 2.1.3.  It has com1 and com2
ports installed, but I could sure use one or two more ports.  The board
that I have allows the ports to be configured only as com1 or com2 and
I haven't seen anything for the AT specifically that allows serial ports
to be configured as com3 or com4.  If I were to install an internal modem
or serial board for a PC and configure it as com[34], would there be
any conflicts for addresses or interrupt vectors?  Perhaps there are no
interrupt vectors assigned to these ports?  Even if the Xenix
driver doesn't support it, I could hack up the current driver or write
my own so that is a setback but not an impossible problem.

Thanks..

Marcus Hall
..!{ihnp4,mcdchg}!illusion!marcus