Re: Switching COM: Ports

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#1219

From: Russ Nelson
Date: Mon, 08 May 1989 17:24

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In article <9593@dasys1.UUCP> jzitt@dasys1.UUCP (Joe Zitt) writes:

   Is there a way to fake out a PC into talking to a different COM port?

Yes and no.  Due to the lack of of interrupt driven COM port service
in the BIOS, everyone directly accesses the 8250.  So the only way to
do what you want is to patch your program to use the different COM port.
This can be non-trivial.
--
--russ (nelson@clutx [.bitnet | .clarkson.edu])
I'm a right-to-lifer -- everyone has a right to earn a living sufficient to
feed himself and his family.

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!leah!rpi!sun.soe.clarkson.edu!nelson
From: nelson@sun.soe.clarkson.edu (Russ Nelson)
Newsgroups: alt.msdos.programmer,comp.sys.ibm.pc
Subject: Re: Switching COM: Ports
Message-ID: <NELSON.89May8132401@sun.soe.clarkson.edu>
Date: 8 May 89 17:24:01 GMT
References: <9593@dasys1.UUCP>
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Organization: Clarkson University, Postdam NY
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In-reply-to: jzitt@dasys1.UUCP's message of 8 May 89 12:54:33 GMT

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