From: Ben Pfaff <blp@cs.stanford.edu>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: BIOS behaves different as real BIOS
Date: Fri, 16 Jul 2004 23:40:17 -0700 [thread overview]
Message-ID: <87brifm90u.fsf@benpfaff.org> (raw)
In-Reply-To: E1BliIR-0003a4-Ey@lists.gnu.org
"Natalia Portillo" <claunia@claunia.com> writes:
> I think that this is because the BIOS searches for the 0x55AA signature on
> last two bytes of first sector of disk.
> As far as I remember, this signature was introduced very lately and as far
> as I tested on my real systems, this signature is not really searched at
> boot time, and every DOS before 3.0 doesn't have it (it is used also by
> later DOSes and Windows to identify a FAT filesystem), at least on floppies
You can disable the signature check by setting byte 0x38 in the
CMOS RAM to a nonzero value.
--
"...In the UNIX world, people tend to interpret `non-technical user'
as meaning someone who's only ever written one device driver."
--Daniel Pead
next prev parent reply other threads:[~2004-07-17 6:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-17 6:01 [Qemu-devel] BIOS behaves different as real BIOS Natalia Portillo
2004-07-17 6:40 ` Ben Pfaff [this message]
2004-07-17 6:45 ` [Qemu-devel] " Natalia Portillo
2004-07-17 6:51 ` Ben Pfaff
2004-07-17 7:04 ` Natalia Portillo
2004-07-17 15:47 ` Ben Pfaff
2004-07-17 7:12 ` [Qemu-devel] " Antony T Curtis
2004-07-17 8:20 ` Natalia Portillo
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