Setting AT Scancode ....

[alien]

hello all,

      i'm writing the keyboard interrupt. i've heard that scan code set 2 (AT) should be chosen, because it is the mostly supported scancode set. but, when i print the make code and break code of my keyboard when i press a key, i receive only the scan code set 1 (XT). i've tried to set the scan code to 2 by the following code :

xor ax, ax
waitt:
in al, 60h
bt ax, 1
jc wait

mov al, 0F0h
out 60h, al
mov al, 03h
out 60h, al

      but, still the interrupt prints only the scancode set 1(XT). any help will be appreciated.

thank you,

[gaffi]

Hi alien,
You have to disable the scancode-translation in the Command-Byte. If you don't do so your keyboard will send AT-codes, but the controller converts them back to XT.

call wait
mov al,0x60
out 64h,al
call wait
mov al,00000011b
out 60h,al

regards,
Daniel Raffler

[alien]

Thank you gaffi for ur help