Path: utzoo!attcan!uunet!mcvax!hafro!krafla!rispa2!orn
From: orn@rsp.is (Orn E. Hansen)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Enhanced Keyboard Scan Codes
Summary: further on Enhanced keyboards
Message-ID: <109@.rsp.is>
Date: 25 Jan 89 09:56:50 GMT
References: <67172BP3@PSUVM> <3421@arcturus> <108@.rsp.is>
Organization: National Hospital of Iceland
Lines: 33

Some machines have a BIOS that can support Enhanced keyboards while others
don't.  Some keys need a little further translation than just the scan
codes,  there is a magic scan code 0x??e0 that is to identify these
keycodes that are not on the PC-Kbd.

There is also a specific way to find out weather the computer has BIOS,
DOS etc., that supports the E-Kbd.  The BIOS date on the XT is supposed
to be after 01-01-86 and for the AT 11-01-86 (mm-dd-yy).

Ok, heres some info on the magic codes 0x??e0.  You take the high byte
subtract it with 0x47 and add 0xb3 to get the actual (correct codes).
Also, the following codes need some special handling:

0x372a -> 0xad00
0x4a2d -> 0xae00
0x4e2b -> 0xaf00
0xe00d -> 0xb000
0xe00a -> 0xb100
0xe02f -> 0xb200

You'll need to re-program the int16 routine (the 0 and 1 functions)
to translate these codes and beware DOS throw's away scan codes it
doesn't recognise!

The keyboard types are stored at location 0x40:0x96, the info on
bits are stored in the header file.  The date of the BIOS is stored
at location 0xFFFF:5 in the format "mm/dd/yy" absolutely.


==========================================================================
Orn Hansen
System analyst.
--------------------------------------------------------------------------