From owner-freebsd-hackers Thu Oct 22 17:06:06 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA25985 for freebsd-hackers-outgoing; Thu, 22 Oct 1998 17:06:06 -0700 (PDT) (envelope-from owner-freebsd-hackers@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 RAA25970 for ; Thu, 22 Oct 1998 17:06:02 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by allegro.lemis.com (8.9.1/8.9.0) with ESMTP id JAA25754; Fri, 23 Oct 1998 09:35:13 +0930 (CST) Received: (from grog@localhost) by freebie.lemis.com (8.9.1/8.9.0) id JAA00959; Fri, 23 Oct 1998 09:35:12 +0930 (CST) Message-ID: <19981023093512.Q28824@freebie.lemis.com> Date: Fri, 23 Oct 1998 09:35:12 +0930 From: Greg Lehey To: Mike Smith Cc: Jason Thorpe , Nick Hibma , FreeBSD hackers mailing list Subject: Re: multi-user: multiple consoles in FreeBSD References: <19981023085339.H28824@freebie.lemis.com> <199810222335.QAA01865@dingo.cdrom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <199810222335.QAA01865@dingo.cdrom.com>; from Mike Smith on Thu, Oct 22, 1998 at 04:35:05PM -0700 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-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thursday, 22 October 1998 at 16:35:05 -0700, Mike Smith wrote: >>> Some display controllers (notably, 3D accellerators) have a jumper >>> to disable VGA mode completely, but then you only get a memory >>> mapped frame buffer (if you're lucky :-) >> >> Hmm. I think this is your proviso. You specifically mean VGA >> compatibility. Well, yes, if you want a graphics board to conform to >> a standard which only allows one board, then you can only use one >> board. But there's more than just a frame buffer if you disable this >> feature. > > Jason's gripe was that you con't have more than one video card because > the second wants its VGA-compatibility registers mapped in the same > place as the first. Right, but there are ways to disable it. > Unless there's something really odd going on, it's relatively > trivial to simply map the I/O ranges for display cards other than > the first somewhere else; you just need the smarts in your system to > do this. > > Video chipsets not supporting this would be in violation of the PCI > spec. I wouldn't expect this to be too common. Hmmm. How would you go about doing it? It would have to be in the BIOS setup, and I can't see anything there that allows it. I suppose you could start up with one video BIOS disabled, and then enable it programmatically during the boot. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message