lkml.org 
[lkml]   [2008]   [Jan]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Default keyboard LEDs
H. Peter Anvin, le Sun 13 Jan 2008 19:50:34 -0800, a écrit :
> >Actually, what would be perfect would be to use the configuration that
> >the BIOS sets at boot by default. That is device-dependent, however.
> >
>
> It is, but it can be read out either by INT calls at initialization
> time, or by reading out the byte at physical address 0x417:

I should have said "arch-dependent".
I didn't mean it wasn't possible, but just it'd probably be better that
driver experts do it, not me :)

> --------K-M00400017--------------------------
> MEM 0040h:0017h - KEYBOARD - STATUS FLAGS 1
> Size: BYTE
> SeeAlso: MEM 0040h:0018h,INT 16/AH=02h,MEM 0040h:0096h
>
> Bitfields for keyboard status flags 1:
> Bit(s) Description (Table M0010)
> 7 INSert active
> 6 Caps Lock active
> 5 Num Lock active
> 4 Scroll Lock active
> 3 either Alt pressed
> 2 either Ctrl pressed
> 1 Left Shift pressed
> 0 Right Shift pressed
> SeeAlso: #M0011,#00587
>
> The same information is available through INT 16h, AH=02h.

Samuel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2008-01-14 11:37    [W:0.029 / U:3.644 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site