Path: utzoo!attcan!uunet!husc6!think!samsung!cs.utexas.edu!ut-emx!allred
From: allred@ut-emx.UUCP (Kevin L. Allred)
Newsgroups: comp.sys.ibm.pc
Subject: how do I get com3 and com4
Keywords: com4 com3 how do I get them
Message-ID: <30842@ut-emx.UUCP>
Date: 1 Jun 90 21:39:40 GMT
Organization: Department of Chemical Engineering
Lines: 18

I went to install an old internal modem into my system, and I came up
against the com3 and com4 question.  The modem could only be
configured as com1 or com2.  Before I tried, I thought I would just
set up my 2 existing serial ports to be com2 and com3.  Between the
manual (which only sould configuration for com1 and com2 with
interrupts 3 and 4) and my experimenting, I couldn't figure out how to
do it.  Does it require a special i/o card to configure com3 and com4?
How do the four com ports share interupts, names, and addresses?

I never could get the modem to work (it was manufactured in 1983 --
back when the xt bus was the norm), so for the moment the question is
accademic, but in the future I will probably want to add another port
or two.
-- 

	Kevin Allred
	allred@emx.cc.utexas.edu
	allred@ut-emx.UUCP