Date: Tue, 26 Sep 2000 22:43:14 +0530
Message-Id: <200009261713.WAA05431@midpec.com>
From: Prashant TR <tr AT midpec DOT com>
To: kalum AT lintux DOT cx
CC: djgpp AT delorie DOT com
In-reply-to: <Pine.LNX.4.21.0009261821040.1365-100000@goatbeard.grendel.net>
	(message from Kalum Somaratna aka Grendel on Tue, 26 Sep 2000 18:22:15
	+0600 (LKT))
Subject: Re: Rebooting the PC
References:  <Pine DOT LNX DOT 4 DOT 21 DOT 0009261821040 DOT 1365-100000 AT goatbeard DOT grendel DOT net>
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| Date: Tue, 26 Sep 2000 18:22:15 +0600 (LKT)
| From: Kalum Somaratna aka Grendel <kalum AT lintux DOT cx>
| 
| > Sorry, there's yet another correction here apart from what Nate has
| > said. The port number is 0x64h, not 0x61h. Sorry again.
| 
| Shouldn't protected mode OS's like windoze trap this and prevent a CPU
| reset hapenning???

Yes, they do that. In fact, if you attempt to do this under Windows,
the program terminates instantaneously and the DOS box closes.

On OSes like Linux .... of course, this won't work unless IOPL is set
to 3 (See http://www.midpec.com/djgpp/protmode/index8.html for details
on IOPL).

--
Prashant TR <tr AT midpec DOT com>
Web: http://www.midpec.com/