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From: aragorn@csd4.csd.uwm.edu (Steve J White)
Newsgroups: comp.windows.ms
Subject: Re: 4 serial ports problem
Keywords: serial ports
Message-ID: <11008@uwm.edu>
Date: 13 Apr 91 03:30:46 GMT
References: <1991Apr12.112845.11257@informatik.uni-erlangen.de>
Sender: news@uwm.edu
Organization: Jobs With Peace @ University of Wisconsin - Milwaukee
Lines: 32

In article <1991Apr12.112845.11257@informatik.uni-erlangen.de> welker@immd2.informatik.uni-erlangen.de (Volkmar Welker) writes:
>I am posting this for a friend having no access to internet.
>Situation : You try to write Windows 3.0 applications which
>            use 4 serial ports on a 386.
>
>Problem : Access to ports works not properly. Various types of
>          misbehaviour are shown by the system.
>
>So far he has got no idea what is going on. Besides some rumors
>that this is a general problem with Windows. 
>
>Question : Any similar experience or even poposals to solve the
>           problem.
>

Yes, this is a concurrent problem with Windows 3.0.  I've been dealing with
this problem personally for the past week or so.  It seems that Windows
doesn't allow interrupt sharing for the COM ports.  I needed to use 3 ports
and I ended up using a switch-box on COM2 for an external modem and a serial
print-sharing device.  Just call Microsoft and complain I guess.  Microsoft
did send me a fax saying that I could rewrite the BIOS code using DOS
debug.  This is a bit out of my ballpark.  Does anyone else have any further
suggestions?

- steve


-- 
"Laugh and the world laughs with you... |  All disclaimers apply... 
     snore and you sleep alone."        |  except my own, of course.
  - anonymous fortune cookie thingy     | ***  Steve J. White  ***      
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