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From: powsner@csb1.nlm.nih.gov (Seth M Powsner)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Serial mouse + two other serial devices?
Keywords: mouse com port
Message-ID: <1991Jan7.014513.23346@nlm.nih.gov>
Date: 7 Jan 91 01:45:13 GMT
References: <19812@yunexus.YorkU.CA> <13840@milton.u.washington.edu>
Sender: usenet@nlm.nih.gov (usenet news poster)
Organization: Yale Univ Sch of Medicine
Lines: 14

Check with MicroSpeed, Inc., 44000 Old Warm Springs Blvd, Fremont, CA
94538 phone 415-490-1403. They make a Pointing Device Adapter -- PDA
Board. It is meant for just this problem. When you buy a "bus" version
of their trackball, this is what they include. They also have a nice
replacement for MOUSE.COM which seems to handle Mouse Systems mice,
Logitech, MicroSoft, and their own stuff. Seems to configure automatically.
We've used the board in a couple of different systems. No I/O port
conficts. Interupt is jumper controlled. Did have a minor software
conflict with TOPS. Seems the MOUSE.COM replacement trys to figure out
what interrupt to use on its own if you don't tell it. Picked on the
FlashCard just enought to cause trouble. Solved by giving explicit
IRQ spec when invoked in batch file.
    Hope this helps.   Seth M Powsner  powsner@nlm.nih.gov
PS- Just a satisfied customer. No commercial interests.