Re: Linus' laptop and Num lock status
From: Jean Delvare
Date: Sun Feb 18 2007 - 11:04:15 EST
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?
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