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amp_man
New visitors - please read the rules.
Joined: 26 Sep 2006
Posts: 6
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 Posted: Tue Mar 20, 2007 10:14 am
Post subject: Monitoring BIOS register programming |
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Is it possible to modify/inject some code into the bios of, say, an asus p2-99 (440zx-based, award bios) to make it send out either to vga or a serial port the registers that it programs on the northbridge, as it's doing it? Or can this info be obtained through reverse engineering? And as far as bricking the motherboard goes, if anyone may be concerned with that, I have a BIOS savior.
Or, could I somehow do this through QEMU or VMWare, since both of these emulate 440bx chipsets, use the p2-99's BIOS along with some userspace tool?
edit: Probably should have mentioned, I'm only interested in up until and including sdram initialization
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cp
BIOS Guru
Joined: 21 Oct 2002
Posts: 1516
Location: Germany
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| Posted: Tue Mar 20, 2007 5:08 pm
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| just disassemble the bios and look for writes to pci config space...bus 0 and device 0
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maman
Master Flasher
Joined: 31 Mar 2002
Posts: 161
Location: Taka Bonerate National Park, Indonesia
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amp_man
New visitors - please read the rules.
Joined: 26 Sep 2006
Posts: 6
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| Posted: Sun Mar 25, 2007 7:13 am
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| Yeah...assembly isn't exactly my cup of tea. I think I'm just giving up on this. Thanks for the links though, I'd already found Pinczakko's site, but not the other one.
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maman
Master Flasher
Joined: 31 Mar 2002
Posts: 161
Location: Taka Bonerate National Park, Indonesia
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edwin
The Hardware Archivist
Joined: 20 Mar 2002
Posts: 4410
Location: Netherlands
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| Posted: Sun Mar 25, 2007 12:12 pm
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| maman wrote: | I am Pinczakko  |
 wow. that's explains a bit or two.
_________________
edwin/evasive
Do not assume anything
System error, strike any user to continue... |
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amp_man
New visitors - please read the rules.
Joined: 26 Sep 2006
Posts: 6
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| Posted: Sun Mar 25, 2007 8:52 pm
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| Quote: | | copyright © 2004, 2005, 2006 Darmawan M S a.k.a Pinczakko |
5 years and you never figured that out But I was just as surprised as you were. Thanks for all the help and info!
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