Date: Wed, 24 Jul 1996 16:05:30 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org (FreeBSD hackers) Cc: erich@lodgenet.com (Eric L. Hernes) Subject: Re: Bootable CD roms Message-ID: <199607241405.QAA17787@uriah.heep.sax.de> In-Reply-To: <199607231943.OAA04317@jake.lodgenet.com> from "Eric L. Hernes" at "Jul 23, 96 02:43:47 pm"
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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. ;-)
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