Huihong,
Maybe you can use EFI then? It is modularized (while not very well
engineered, IMO), and have some USB support.
Nikolay
Huihong Luo пишет:
thanks for the pointer.
We also have some usb code from our boot loader can be used.
The problem with current vbox bios code, all code is in the single
huge file (rombios.c). In order to support usb, we need some modulized
clock and pci code. Clock timers are needed for scheduling usb frames.
--- On *Tue, 6/22/10, Alexey Eremenko /<[email protected]>/* wrote:
From: Alexey Eremenko <[email protected]>
Subject: Re: [vbox-dev] What prevents from using a different BIOS ?
To: [email protected]
Date: Tuesday, June 22, 2010, 3:30 PM
On Wed, Jun 23, 2010 at 12:17 AM, Huihong Luo <[email protected]
<http://us.mc343.mail.yahoo.com/mc/[email protected]>>
wrote:
>
> I am trying to extend the vbox BIOS module to support USB
devices, and flash drive boot.
>
> The current BIOS is 64k in size, what is the consequency if we
increase the size to 128K? the usb code is rather large, 64k won't
hold it.
>
> Or, perhaps a better way, is to replace the whole bios code. Is
there anything specific to vbox that makes this not to work? if
not, is it going to be really difficult to port another BIOS to
use with vbox?
>
> The current bios code is monolithic, not easy to extend.
>
Before you write any such thing, please take a look at SeaBIOS here:
http://www.coreboot.org/SeaBIOS
It seems this BIOS supports USB disk boot, and it was ported to
run on Qemu.
NOTE: I have not tried it, so I don't know about any potential
problems.
The big problem of changing BIOS, is that we must ensure *everything*
works with all guest OSes, which is not easy.
--
-Alexey Eromenko "Technologov"
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