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From: ahamalainen@abo.fi
Newsgroups: comp.windows.ms
Subject: Re: Windows and COM3
Message-ID: <7286.27bc3c5c@abo.fi>
Date: 15 Feb 91 19:54:04 GMT
References: <1991Feb12.190322.22184@gpu.utcs.utoronto.ca> <12126@helios.TAMU.EDU>
Organization: Abo Akademi University, Finland
Lines: 48

In article <12126@helios.TAMU.EDU>, n117be@tamuts.tamu.edu (Eugenio Ulian)
 writes:


> I was having problems with my com3, my internal modem, and Terminal until
> yesterday. I called Microsoft and they faxed me a few problem solving sheets
> for the message that reads: "The port is being used by a DOS application" or
> something like that.
> I went through their instructions step by step and after 6 months I am finally
> able to use Terminal.
> I had called them before, and the answer I got at that time (6 months ago) was
> that I wouldn't be able to use my com3 since my machine did not have micro
> chaneling ? capability. I guess they are learning to fix their bugs.
> 
> Eugenio Ulian
> ecu7967@tamvenus

I also encountered 'whole-loota-troubles' trying to make my internal modem work.
Finally after re-re-re-- reading the sysini*.txt files for the umpteenth time
I found out what really was wrong. Windows expects the base-memory addresses
to be quite different from the real ones e.g. I had..

To show the details:
the default value (base-address) for com3 is 2e8 (hex) - in my system (opti
motherboard) the value should read 3e8.. somewhat of a difference, ay?
Also the responding Irq-values caused me serious head-aches.. there is a
setting in system.ini to change the value  (but in small print - and in the
_real_advanced_users_section_ (?)).. You can use the same irq in com3/4 as well
as in com1/2 - but be carefull...

the commands to use in your sys.ini [386enh section]
Com3Base=<address>      def 2e8
Com3Irq=<irq>           def 4
Com3AutoAssign=<num>    def 2 (strange, this one seemed to work!)

Well, hope these _MINOR_ worries could be warned about in the next manual...
	-- Antti
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