From owner-freebsd-hackers Thu Jul 25 01:04:20 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id BAA25414 for hackers-outgoing; Thu, 25 Jul 1996 01:04:20 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id BAA25406 for ; Thu, 25 Jul 1996 01:04:13 -0700 (PDT) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id QAA00438 for ; Wed, 24 Jul 1996 16:55:45 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id QAA05815; Wed, 24 Jul 1996 16:54:19 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.5/8.6.9) id QAA17787; Wed, 24 Jul 1996 16:05:30 +0200 (MET DST) From: J Wunsch Message-Id: <199607241405.QAA17787@uriah.heep.sax.de> Subject: Re: Bootable CD roms To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Wed, 24 Jul 1996 16:05:30 +0200 (MET DST) Cc: erich@lodgenet.com (Eric L. Hernes) In-Reply-To: <199607231943.OAA04317@jake.lodgenet.com> from "Eric L. Hernes" at "Jul 23, 96 02:43:47 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Eric L. Hernes wrote: > >I've also been looking at El Torito, and figured that they've invented > >a lot of useless crap. :) > > For the most part I'd agree. All that's really needed is a simple > way for the bios get code off CD. Yep. It would have seemed logical to invent a new BIOS drive # with a given geometry, and pass this on to the loaded bootstrap in %dl. > which hardware supports it. After I've found hardware that'll > support booting, I'll hack on mkisofs to spit out a bootable image. No need to hack mkisofs in the first place. We do already have the tool to merge the bootcode into an existing isofs. It's called dd(1). Wait a minute, yep, the El Toredo specs didn't use the first 32 KB (where there are plenty of space), but the very first sector _after_ the start of the isofs. So of course, we must make sure that mkisofs leaves this one blank. (Dunno whether it puts something there right now.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)