From: "H. Peter Anvin" <hpa@zytor.com>
To: John Bradford <john@grabjohn.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Bootable CD idea
Date: Wed, 30 Apr 2003 14:18:40 -0700 [thread overview]
Message-ID: <3EB03DB0.1080804@zytor.com> (raw)
In-Reply-To: <200304301921.h3UJLgCZ001523@81-2-122-30.bradfords.org.uk>
John Bradford wrote:
>
> Ah, it makes more sense now :-). So, could I bodge 2.4 in to working
> by modifying bootsect.S with something like this?
>
>
> movw $disksizes+1, %si # Force 18 sectors/track
> probe_loop:
> lodsb
> cbtw # extend to word
> xchgw %cx, %ax # %cx = track and sector
> xorw %dx, %dx # drive 0, head 0
> movw $0x0200, %bx # address = 512, in INITSEG (%es = %cs)
> movw $0x0201, %ax # service 2, 1 sector
> int $0x13
> movb $0x03, %ah # read cursor pos
> xorb %bh, %bh
>
> John.
Perhaps you could, but why the fsck do you want to beat a dead horse
over and over again? Use a real bootloader instead.
-hpa
prev parent reply other threads:[~2003-04-30 21:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-30 11:54 Bootable CD idea John Bradford
2003-04-30 12:21 ` Richard B. Johnson
2003-04-30 12:41 ` John Bradford
2003-04-30 13:14 ` Tomas Szepe
2003-04-30 13:46 ` John Bradford
2003-04-30 13:47 ` Tigran Aivazian
2003-04-30 13:25 ` John Bradford
2003-04-30 18:57 ` H. Peter Anvin
2003-04-30 19:21 ` John Bradford
2003-04-30 21:18 ` H. Peter Anvin [this message]
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