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Redragon

Joined: 27 Nov 2004
Posts: 101
Location: U.S.

Redragon 13 Mar 2005, 17:50

I was wondering how you would activate the LED on the keyboard for "CAPS LOCK"... (peferably in fasm) thanks!

13 Mar 2005, 17:50

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 13 Mar 2005, 22:45

i have been doing it through keyboard ports (somewhere around 60h i think). Check ralf brown. You also have to check PPI port before setting LEDs or there will be only about 50% success in setting. Sorry, i don't have the code anymore

13 Mar 2005, 22:45

Redragon

Joined: 27 Nov 2004
Posts: 101
Location: U.S.

Redragon 14 Mar 2005, 00:16

heres the code ive come up with so far, but it dosent work..if anyone can tell me why, it would be greatly appreciated

Code:

caps:
        cmp   al,0x3A    ;if user presses "caps"
        in    al,64h        
        and   al,02h

        mov   al,0001b  ;caps byte code
        out   60h,al

[/code]

14 Mar 2005, 00:16

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8353
Location: Kraków, Poland

Tomasz Grysztar 14 Mar 2005, 00:25

This piece of code is from my "kelvar" example (you can get it from the Examples section of this website):

Code:

set_keyboard_LEDs:
; bl = keyboard LEDs status
        mov     ah,0ADh
        call    write_8042
        mov     ah,0EDh
        call    write_keyboard
        mov     ah,bl
        and     ah,111b
        call    write_keyboard
        mov     ah,0AEh
        call    write_8042
        ret
      write_8042:
        in      al,64h
        test    al,10b
        jnz     write_8042
        mov     al,ah
        out     64h,al
        ret
      write_keyboard:
        mov     al,ah
        out     60h,al
        in      al,60h
        cmp     al,0FAh
        jne     write_keyboard
        ret

Check Ralf Brown's Port list for the details on command codes it uses.

14 Mar 2005, 00:25

bubach

Joined: 17 Sep 2004
Posts: 341
Location: Trollhättan, Sweden

bubach 15 Mar 2005, 14:35

My code:
http://www.mega-tokyo.com/forum/index.php?board=1;action=display;threadid=7009

15 Mar 2005, 14:35

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