Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ucdavis!iris!foss
From: foss@iris.ucdavis.edu (Jim Alves-Foss)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Activating COM3 and COM4
Message-ID: <4160@ucdavis.ucdavis.edu>
Date: 3 May 89 15:36:52 GMT
References: <8036@fluke.COM>
Sender: uucp@ucdavis.ucdavis.edu
Reply-To: foss@iris.ucdavis.edu (Jim Alves-Foss)
Organization: U.C. Davis - Department of Electrical Engineering and Computer Science
Lines: 19

In article <8036@fluke.COM> lal@tc.fluke.COM (Larry Lohkamp) writes:
>difference, my DOS rev. is 3.3. Can I get all 4 ports to work, or am I
>dreaming the impossible?

I have an internal modem using port 3 and DOS 3.3
What I did to let the modem work was write a simple little program to do the
following:

1. Change DOS equipment register to state I have 3 serial ports
2. Place the Port Base Address into the DOS table for serial ports - room 
   exists for at least 7 (maybe 8).

I wrote the code in BASIC - less than 5 lines, compiled it and have my
autoexec.bat file automatically run it when I boot.

Unfortunately I do not have the code here. I'll try to remember to post it
tonight.  

-Jim Alves-Foss