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Date: Tue, 4 May 2004 13:38:40 -0700
From: Jesse Allen <the3dfxdude@hotmail.com>
To: linux-kernel@vger.kernel.org
Subject: RE: IO-APIC on nforce2 [PATCH] + [PATCH] for nmi_debug=1 + [PATCH] for idle=C1halt, 2.6.5
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Allen Martin wrote:
> This will require changing the value for register at bus:0 dev:0 func:0
> offset 6c.
>
> Chip   Current Value   New Value
> C17       1F0FFF01     1F01FF01
> C18D      9F0FFF01     9F01FF01
>
> Northbridge chip version may be determined by reading the PCI revision
> ID (offset 8) of the host bridge at bus:0 dev:0 func:0.  C1 or greater
> is C18D.

I believe I have confirmed that the Shuttle AN35N BIOS indeed has this fix as
of Dec 5th 03 version.

lspci -xxx -vvv
00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?) 
(rev c1)
...
60: 08 00 01 20 20 00 88 80 10 00 00 00 01 ff 01 9f

Jesse