Re: Linus' laptop and Num lock status

[H. Peter Anvin]

Jean Delvare wrote:
> On Thu, 15 Feb 2007 06:34:35 -0800, H. Peter Anvin wrote:
> > Jean Delvare wrote:
> > > On x86, the BIOS led state can be read from byte 0x97 the BIOS RAM. The
> > > BIOS RAM is mapped at 0x400 so all we need to do is to one byte from
> > > RAM (offset 0x497). This is how Suse's hwinfo does.
> > Perhaps that's what Suse does, but the proper address is 0x417.
> >
> > 0x497 is the rarely-used LPT2 timeout counter.
>
> Still, the information printed by hwinfo is correct, I've tested it
> myself. Is there some publicly available documentation about the x86
> BIOS RAM mapping?

Google for Ralf Brown's Interrupt List.

	-hpa
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