From: Lars Erdmann <lars DOT erdmann AT arcor DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: farpeekw under Windows NT
Date: Wed, 29 May 2002 18:02:14 +0200
Organization: Arcor
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Message-ID: <3CF4FB86.46A672BF@arcor.de>
References: <3CF4EE40 DOT 19E44519 AT arcor DOT de> <200205281523 DOT g4SFNZw26739 AT envy DOT delorie DOT com>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hi,

just another question:
If I write to I/O port 0x378 to send some data, windowsNT does not seem
to do anything, whereas on Windows95 it works.

Are you accomplishing port I/O by setting IOPL to 3 or does NT somehow
also catches and emulates that ?

Lars

DJ Delorie schrieb:
> 
> The IBM PC spec defines three parallel ports:
> 
> 3BC - on monochrome card
> 378 - primary on mainboard
> 278 - secondary on mainboard
> 
> NT emulates all three, so you see three addresses in your DOS
> emulation window.