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Re: QEMU and ElTorito and EDD 3

From: Alex Roman
Subject: Re: QEMU and ElTorito and EDD 3
Date: Wed, 13 Jun 2007 14:50:06 -0400

On 13/06/07, Vesa Jääskeläinen <address@hidden> wrote:
Alex Roman wrote:

El Torito part of the EDD3 spec might not be accessible if you have not
booted with such media that needs that support. At least this seems to
be case with VMWare which uses Phoenix BIOS. I once tested out those
CD-ROM access API's, but problem is that those devices are not exposed
by BIOS when booted from floppy or from HDD. Eg. when you enumerate all
devices, CD-ROM drives are not listed at all thus cannot be accessed.

That may be a problem...

But then again... I noticed that your device id was 0xe0 which I think I
may have not tried out. I had much better success with directly using ATA :)

I got that through random probing... I probed for all drives which
presented EDD 3 extensions, and 0xe0 was the only one.. It turned out
it was actually the CD-ROM :) Is there any standard device numbering
algorithm used by BIOSes?

If you have floppy image, I can try it out in VMWare and tell results
what happens.

Sure, I'll send it tonight, when I get home... Thanks!

Alex Roman <address@hidden>

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