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From: valley@gsbsun.uchicago.edu (Doug Dougherty)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Why does my modem disable the serial port?
Message-ID: <1991Jun10.153842.12545@midway.uchicago.edu>
Date: 10 Jun 91 15:38:42 GMT
References: <1991May25.133555.7807@bronze.ucs.indiana.edu>
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Organization: University of Chicago
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hanj@bronze.ucs.indiana.edu (Jining Han) writes:



>I have a very standard 286 (AMI bios), with 2 parallel ports and
>2 serial ports.  The problem is, when I put a modem in, one of the
>serial ports is disabled (com1 if I set modem to use com1 or com3,
>com2 if I set modem to use com2 or com4).  

You have to disable one of the on-board serial ports when you install an
internal modem.  Else you end up with two devices trying to be the same
COM port.  (I.e., I think the thing you don't realize is that the
internal modem has a built-in serial port)
--

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