From owner-freebsd-current Tue Feb 24 16:18:11 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA13951 for freebsd-current-outgoing; Tue, 24 Feb 1998 16:18:11 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from allegro.lemis.com (allegro.lemis.com [192.109.197.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA13924; Tue, 24 Feb 1998 16:17:59 -0800 (PST) (envelope-from grog@lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.8.7/8.8.5) with ESMTP id KAA10308; Wed, 25 Feb 1998 10:47:34 +1030 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.8.8/8.8.7) id KAA19194; Wed, 25 Feb 1998 10:47:33 +1030 (CST) (envelope-from grog) Message-ID: <19980225104733.25831@freebie.lemis.com> Date: Wed, 25 Feb 1998 10:47:33 +1030 From: Greg Lehey To: shimon@simon-shapiro.org, Mike Smith Cc: =?iso-8859-1?Q?S=F8ren_Schmidt?= , freebsd-current@FreeBSD.ORG, yokota@zodiac.mech.utsunomiya-u.ac.jp, Andrzej Bialecki Subject: Re: Proposed addition to panic() behaviour References: <199802242327.PAA17047@dingo.cdrom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89i In-Reply-To: ; from Simon Shapiro on Tue, Feb 24, 1998 at 03:59:17PM -0800 WWW-Home-Page: http://www.lemis.com/~grog Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, 24 February 1998 at 15:59:17 -0800, Simon Shapiro wrote: > > On 24-Feb-98 Mike Smith wrote: >>>> 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. > > I really hate to say this: Let's see if someone else who is more BIOS and > real-mode fluent can pick this idea up. Last time I wrote something like > this was a while ago, and I am sort of busy with other FreeBSD > issues. Doesn't that go for all of us? That's why it's not there yet. Greg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message