From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1I4y2T-0006WY-DK for mharc-grub-devel@gnu.org; Sun, 01 Jul 2007 07:56:25 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1I4y2R-0006W5-Ph for grub-devel@gnu.org; Sun, 01 Jul 2007 07:56:23 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1I4y2Q-0006Vg-Ci for grub-devel@gnu.org; Sun, 01 Jul 2007 07:56:23 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1I4y2Q-0006Vd-6a for grub-devel@gnu.org; Sun, 01 Jul 2007 07:56:22 -0400 Received: from aybabtu.com ([69.60.117.155]) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1I4y2P-0001Me-QE for grub-devel@gnu.org; Sun, 01 Jul 2007 07:56:21 -0400 Received: from [192.168.10.6] (helo=aragorn) by aybabtu.com with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from ) id 1I4y2N-00011s-RM for grub-devel@gnu.org; Sun, 01 Jul 2007 13:56:20 +0200 Received: from rmh by aragorn with local (Exim 4.63) (envelope-from ) id 1I4y3p-0001AE-PR for grub-devel@gnu.org; Sun, 01 Jul 2007 13:57:49 +0200 Date: Sun, 1 Jul 2007 13:57:49 +0200 From: Robert Millan To: The development of GRUB 2 Message-ID: <20070701115749.GA4442@aragorn> References: <8c0c43de0706261836j84bdc88q59d166036741e3f5@mail.gmail.com> <8c0c43de0706280704v2481f636kcec12debeafbbf55@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8c0c43de0706280704v2481f636kcec12debeafbbf55@mail.gmail.com> Organization: free as in freedom X-Message-Flag: Microsoft discourages use of Outlook. X-Debbugs-No-Ack: true User-Agent: Mutt/1.5.13 (2006-08-11) X-Warning-HTML-Mail2: yes X-detected-kernel: Genre and OS details not recognized. Subject: Re: CD-ROM booting staus update X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GRUB 2 List-Id: The development of GRUB 2 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 01 Jul 2007 11:56:24 -0000 On Thu, Jun 28, 2007 at 10:04:12AM -0400, Alex Roman wrote: > On 26/06/07, Alex Roman wrote: > >Thought I'd write a little status update on this project. > > All right, I took a look at the Bochs BIOS source code, and they seem > to be implementing just one Int 13h function that is specified in the > Eltorito specification: the 4B01h that isolinux needs to boot. > > Next, I started to use Bochs' internal debugger and I noticed that the > grub_gate_a20 function clobbers %edx which was what was causing me the > grief, since I was holding the number of bytes to copy from my buffer > (that I read into from the CD) to 7c00h. So, instead of copying at > least 2k which is what ISOLINUX expects, it was copying only 224 bytes > (or something like that, the leftover value in %edx). > > Now that I figured that out, *I managed to get the FreeDOS CD to boot! :)* Congrats :-) -- Robert Millan My spam trap is honeypot@aybabtu.com. Note: this address is only intended for spam harvesters. Writing to it will get you added to my black list.