Date: Tue, 24 Feb 1998 15:27:44 -0800 From: Mike Smith <mike@smith.net.au> To: shimon@simon-shapiro.org Cc: Mike Smith <mike@smith.net.au>, abial@nask.pl (Andrzej Bialecki), yokota@zodiac.mech.utsunomiya-u.ac.jp, freebsd-current@FreeBSD.ORG, =?us-ascii?Q?S=F8ren?= Schmidt <sos@FreeBSD.ORG> Subject: Re: Proposed addition to panic() behaviour Message-ID: <199802242327.PAA17047@dingo.cdrom.com> In-Reply-To: Your message of "Tue, 24 Feb 1998 15:26:54 PST." <XFMail.980224152654.shimon@simon-shapiro.org>
next in thread | previous in thread | raw e-mail | index | archive | help
> > 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199802242327.PAA17047>