From owner-freebsd-hackers Thu Dec 9 0:54: 7 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by hub.freebsd.org (Postfix) with ESMTP id 307F51526B for ; Thu, 9 Dec 1999 00:54:05 -0800 (PST) (envelope-from robert@cyrus.watson.org) Received: from fledge.watson.org (robert@fledge.pr.watson.org [192.0.2.3]) by fledge.watson.org (8.9.3/8.9.3) with SMTP id DAA27828; Thu, 9 Dec 1999 03:54:06 -0500 (EST) (envelope-from robert@cyrus.watson.org) Date: Thu, 9 Dec 1999 03:54:05 -0500 (EST) From: Robert Watson X-Sender: robert@fledge.watson.org Reply-To: Robert Watson To: Neil Blakey-Milner Cc: freebsd-hackers@freebsd.org Subject: Re: question about boot loaders In-Reply-To: <19991209102159.B88680@ns1.sunesi.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG dcs suggests that the correct answer is: mbr is a replacement for boot0, without the OS choices. This seems to make sense, so I'll go with that unless someone has a better idea :-). We assume that you would never, therefore, use both mbr and boot0, explaining why there doesn't need to be an extra 512 bytes somewhere :-). Thanks, On Thu, 9 Dec 1999, Neil Blakey-Milner wrote: > On Thu 1999-12-09 (02:46), Robert Watson wrote: > > Once we get into boot2 land, I recognize the FreeBSD-specific loading > > code, etc. What I don't know much about is those first three 512-byte > > chunks of code. Boot0 appears to be booteasy, but given some ignorance > > about the i386 boot process, I'm not sure whether it's loaded by mbr, or > > by the bios, and where it lives partition-wise. Similarly, how boot1 fits > > into it the whole scheme--I assume this is FreeBSD-specific as it knows > > about boot2, but don't know where it lives, etc. Preferably, afterwards, > > also drop the results into sys/boot/i386/README. :-) > > I wrote up some basic stuff, which doesn't seem quite to describe > what you're after, but which may be of use, at > http://rucus.ru.ac.za/~nbm/boot/ > > It's intended for the handbook, but I haven't had time since starting > my new job to work on it much more. > > Neil > -- > Neil Blakey-Milner > nbm@rucus.ru.ac.za > Robert N M Watson robert@fledge.watson.org http://www.watson.org/~robert/ PGP key fingerprint: AF B5 5F FF A6 4A 79 37 ED 5F 55 E9 58 04 6A B1 TIS Labs at Network Associates, Safeport Network Services To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message