From owner-freebsd-questions@FreeBSD.ORG  Mon Jan 31 22:55:38 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 07FF216A4CE
	for <freebsd-questions@freebsd.org>;
	Mon, 31 Jan 2005 22:55:38 +0000 (GMT)
Received: from pencil.math.missouri.edu (pencil.math.missouri.edu
	[128.206.49.147])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 6883743D1F
	for <freebsd-questions@freebsd.org>;
	Mon, 31 Jan 2005 22:55:37 +0000 (GMT)
	(envelope-from rich@pencil.math.missouri.edu)
Received: from pencil.math.missouri.edu (rich@localhost [127.0.0.1])
	j0VMtUNa093545;	Mon, 31 Jan 2005 16:55:30 -0600 (CST)
	(envelope-from rich@pencil.math.missouri.edu)
Received: (from rich@localhost)j0VMtUaw093544;
	Mon, 31 Jan 2005 16:55:30 -0600 (CST)	(envelope-from rich)
From: Rich Winkel <rich@math.missouri.edu>
Message-Id: <200501312255.j0VMtUaw093544@pencil.math.missouri.edu>
In-Reply-To: <c928fabf2e3d1fd3843b81d44eb08c07@chrononomicon.com>
 "from Bart Silverstrim at Jan 31, 2005 03:29:37 pm"
To: Bart Silverstrim <bsilver@chrononomicon.com>
Date: Mon, 31 Jan 2005 16:55:30 -0600 (CST)
X-Mailer: ELM [version 2.4ME+ PL82 (25)]
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=US-ASCII
X-Spam-Status: No, hits=0.0 required=8.0 tests=none autolearn=no version=2.63
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on 
	pencil.math.missouri.edu
X-Virus-Scanned: clamd / ClamAV version 0.71, clamav-milter version 0.71
X-Virus-Status: Clean
cc: Billy Newsom <smartweb@leadhill.net>
cc: freebsd-questions@freebsd.org
Subject: Re: How do I do a COLD Reboot on FreeBSD?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 31 Jan 2005 22:55:38 -0000

According to Bart Silverstrim:
> Warm boots basically just cycle the computer to restart the OS.  It's 
> just restarting it, and power to the components has been maintained the 
> whole time so as far as the computer hardware is concerned nothing 
> really happened, just a chunk of memory access and the processor mode 
> getting kicked around a bit.

It's been a long time, but it seems to me the byte at
absolute address 0x412 (labelled MFG_TST in the old ibm bios listing)
determines whether the bios does a full POST or not.  If that value
is nulled out before the reboot, I think it will do a full POST.

Rich