Re: question: i/o port 0x61 on x86 archs

From: Randy.Dunlap (
Date: Sat Jun 08 2002 - 17:01:13 EST

On Sat, 8 Jun 2002, Ravikiran G Thirumalai wrote:

| I have a question regdg do_nmi routine in x86; what does location 0x61
| from inb(0x61) do? Is it something very well known in intel archs?

Yes, see any Intel PIIX or ICH chipset spec.
I'm looking at the 82801BA I/O Controller Hub 2 (ICH2)
spec., section 9.7.1.

Port 0x61 is the NMI status and control register.


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