From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kendall Bennett" Subject: Re: Generic VESA framebuffer driver and Video card BOOT? Date: Thu, 21 Oct 2004 12:36:59 -0700 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <4177AD6B.8391.20F028B0@localhost> References: <41763777.26324.1B3B684C@localhost> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Transfer-Encoding: 7BIT Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1CKikJ-0008D2-HI for linux-fbdev-devel@lists.sourceforge.net; Thu, 21 Oct 2004 12:37:11 -0700 Received: from mail.scitechsoft.com ([63.195.13.67]) by sc8-sf-mx1.sourceforge.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.41) id 1CKikJ-00007j-3m for linux-fbdev-devel@lists.sourceforge.net; Thu, 21 Oct 2004 12:37:11 -0700 In-reply-to: <20041020190846.GA21315@elf.ucw.cz> Content-description: Mail message body Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: Pavel Machek Cc: linux-kernel@vger.kernel.org, linux-fbdev-devel@lists.sourceforge.net Pavel Machek wrote: > > Yes, but there is only a very small set of PC hardware features you need > > to implement, and most BIOS'es only look at those things for timing > > purposes. Unfortunately there is no standard for how BIOS'es do internal > > timing and delay loops, so we emulate them all (8253 timers, speaker > > ports and CMOS time/date support ;-). > > Hmm, that does not seem that bad. Did you need to emulate interrupt > controller, too? That one seemed most scary to me. No. Only software interrupts. The BIOS never deals with hardware interrupts since there is no standard, reliable way to hook them from real mode so it never uses them ;-) Regards, --- Kendall Bennett Chief Executive Officer SciTech Software, Inc. Phone: (530) 894 8400 http://www.scitechsoft.com ~ SciTech SNAP - The future of device driver technology! ~ ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl