Date: Wed, 17 Oct 2001 10:39:54 -0700 (PDT) From: Doug Ambrisko <ambrisko@ambrisko.com> To: Thomas Dixon <thomas@vbc.net> Cc: John Baldwin <jhb@FreeBSD.ORG>, hackers@FreeBSD.ORG Subject: Re: Problems with booting of CD-ROM (fwd) Message-ID: <200110171739.f9HHdsr11462@ambrisko.com> In-Reply-To: <Pine.BSF.4.10.10110171606030.394-100000@brunel.uk1.vbc.net>
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Thomas Dixon writes: | | | On Tue, 16 Oct 2001, John Baldwin wrote: | | > | > On 16-Oct-01 Thomas Dixon wrote: | > > I'm trying to make a bootable CD using the cdboot program that come with | > > freeBSD in /sys/i386/boot/cdboot. The computer I'm trying to do this on | > > definately boots other CDs as it has booted several other CDs. However | > > using a CD I've made using mkisofs and cdboot it gives the error; | > > | > > Your BIOS int 0x13 extensions seem to be disabled. | > > It's impossible to boot a CD-ROM without them. | > > (BIOS int 0x13 fn 0x4b01 yielded error 1) | > > | > > I'm using an Asus P5A motherboard, there appears to be no way to enable | > > the int 0x13 extensions in the BIOS and there is nothing in the manual | > > that refers to these. | > > | > > Any ideas why this error is coming up or how to fix it? | > | > Don't use cdboot or cdldr, they don't qutie work yet. :( | > | > Instead, make a floppy image and use that to boot. | > | I've tried this and I couldn't figure out the syntax for loader.rc to load | the file system from the cd-rom, any ideas? I'd skip the MFS step and just put the kernel on the boot floppy with loader and friends. Then in /boot/loader.rc add: boot -C So it looks something like: \ Loader.rc \ $FreeBSD: src/sys/boot/forth/loader.rc,v 1.2 1999/11/24 17:59:37 dcs Exp $ \ \ Includes additional commands include /boot/loader.4th \ Reads and processes loader.rc start \ Tests for password -- executes autoboot first if a password was defined check-password \ Unless set otherwise, autoboot is automatic at this point boot -C Atleast this works for me even on IBM machine as of 4.4-Release! If you run out of room for your kernel (even if you gzip it) you can kldload modules off the CD during startup. Doug A. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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