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Scan-codes
https://forum.osdev.org/viewtopic.php?f=1&t=9648		 Page 1 of 1
Author:  Whodoo [ Wed Jun 30, 2004 3:35 pm ]
Post subject:  Scan-codes
After a long time and lots and lots of topics, I got the keyboard interrupt working ;D But how do I convert the scancode? Also I read that ESC has the scancode 1, but when I print the scancode of a key that I press, ESC shows 68..
Author:  Brendan [ Thu Jul 01, 2004 2:10 am ]
Post subject:  Re:Scan-codes
Hi,

There's 2 different sets of scan codes. The first one is normally used when the keyboard sends data to the keyboard controller chip. The keyboard controller chip usually converts this into a second (XT compatible) scan set before the keyboard driver reads it.

Therefore, you should be getting these scan codes (with XT compatible tanslation):
http://panda.cs.ndsu.nodak.edu/%7Eachap ... odes1.html

With these scan codes 68 (0x44) is the 'F10' key, and ESCAPE would be 1 (0x01).

If you turn the XT translation off you would get these scan codes instead:
http://panda.cs.ndsu.nodak.edu/%7Eachap ... odes2.html

With these scan codes 68 (0x44) is the letter 'O' key, and ESCAPE would be 118 (0x76).


Cheers,

Brendan
Author:  WhoDoo [ Thu Jul 01, 2004 7:39 am ]
Post subject:  Re:Scan-codes
Thanks you.. what is the Make and Break tables? The make I understand but the break?
Author:  Solar [ Thu Jul 01, 2004 8:11 am ]
Post subject:  Re:Scan-codes
You mean, you didn't understand the tables at
http://panda.cs.ndsu.nodak.edu/~achapwe ... odes1.html ?

Well, you could have tried
http://panda.cs.ndsu.nodak.edu/~achapwe ... board.html (which is conveniently linked at the bottom of the former page under "related information") to find this:

Quote:
There are two different types of scan codes: "make codes" and "break codes". A make code is sent when a key is pressed or held down. A break code is sent when a key is released.


:) <= meaning, no offense intended, try to take the morale for future web research. ;)
Author:  Whodoo [ Thu Jul 01, 2004 8:31 am ]
Post subject:  Re:Scan-codes
hee-hee thank you.. :)
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