Message-ID: <362B3545.498999B@montana.com>
Date: Mon, 19 Oct 1998 06:49:09 -0600
From: bowman <bowman AT montana DOT com>
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To: djgpp AT delorie DOT com
Subject: Re: Questions about protected mode interrupt handler
References: <Pine DOT GSO DOT 4 DOT 05 DOT 9810191119100 DOT 7388-100000 AT rtbsci146s>
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Reply-To: djgpp AT delorie DOT com



Olivier Perron wrote:
> 
> Note that if I hook the timer interrupt (8) it works well both under
> Windows and plain DOS. It's just the serial port interrupt (and maybe
> others, who knows) which causes problem.

Windows is a little stuffy about hardware. It will let you use it if
nobody has a prior claim staked out, otherwise it quietly ignores your
request. Is there any modem, printer, or other VxD attached to that
port?