From owner-freebsd-current Tue Feb 24 15:31:57 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA05567 for freebsd-current-outgoing; Tue, 24 Feb 1998 15:31:57 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA05548; Tue, 24 Feb 1998 15:31:50 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.8.8/8.8.5) with ESMTP id PAA17047; Tue, 24 Feb 1998 15:27:45 -0800 (PST) Message-Id: <199802242327.PAA17047@dingo.cdrom.com> X-Mailer: exmh version 2.0zeta 7/24/97 To: shimon@simon-shapiro.org cc: Mike Smith , abial@nask.pl (Andrzej Bialecki), yokota@zodiac.mech.utsunomiya-u.ac.jp, freebsd-current@FreeBSD.ORG, =?us-ascii?Q?S=F8ren?= Schmidt Subject: Re: Proposed addition to panic() behaviour In-reply-to: Your message of "Tue, 24 Feb 1998 15:26:54 PST." Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Date: Tue, 24 Feb 1998 15:27:44 -0800 From: Mike Smith Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by hub.freebsd.org id PAA05549 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > That something is card-specific code in the BIOS ROM on the card. You > > may see it signing on if your monitor warms up quickly enough. > > > > This is real-mode 8086 code which can make all sorts of assumptions > > about the state of the machine at that point in the boot phase. Some > > of those assumptions aren't valid when the kernel is running. (Some > > are, but to get to a mode where you can run this code is a bit > > daunting.) > > These entry points are known and standardized. since we are talking panic > mode here, switching back to realmode, to reset the video card to standard > VGA mode can be considrered and will have a very positive support impact. Yes, the entry points are well known and standardised. And if you want to write some simple code that switches back to real mode, hits the BIOS and then swaps back to the debugger call, then we'd be more than happy to include it. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message