linux-kernel - Re: [PATCH] Use BIOS Keyboard variable to set Numlock

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Message-ID: <Pine.LNX.4.58.0707132017190.3034@be1.lrz>
Date:	Fri, 13 Jul 2007 20:25:47 +0200 (CEST)
From:	Bodo Eggert <7eggert@....de>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Bodo Eggert <7eggert@....de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] Use BIOS Keyboard variable to set Numlock

On Wed, 11 Jul 2007, H. Peter Anvin wrote:
> Bodo Eggert wrote:

> >> That being said, one could argue that since this is a BIOS interface it
> >> should be queried via INT 16h, AH=02h and stuffed in the zeropage
> >> structure.  This would also solve the issue of it not being supported by
> >> non-BIOS firmware.
> > 
> > This is an interesting option, but it's more invasive. I'd rather like a 
> > feedback saying we can depend on that data area to be there.
> 
> I don't think we can.  You might find garbage there.

I asked you not to say that ...


Can somebody using LinuxBIOS or OpenFirmware please do

dd if=/dev/mem bs=1 count=1 skip=$((0x417)) | hexdump
 - and -
dd if=/dev/mem bs=1 count=14 skip=$((0x400)) | hexdump

You should get
 - one byte for the keyboard status, 0x20 == Numlock

 - seven words for the legacy serial and parallel ports, port address only
   (e.g. 03f8 02f8 0000 0000 0378 0000 0000)

-- 
C program run. C program crash. C programmer quit. 
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