Path: utzoo!utgpu!cs.utexas.edu!sdd.hp.com!caen!uwm.edu!rutgers!phoenix.princeton.edu!subbarao
From: subbarao@PHOENIX.PRINCETON.EDU (Kartik Subbarao)
Newsgroups: alt.hackers
Subject: Keyboard hack
Message-ID: <7579@idunno.Princeton.EDU>
Date: 27 Mar 91 15:26:22 GMT
Sender: nobody@rutgers.rutgers.edu
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Approved: nobody@rutgers.rutgers.edu


We're writing a small operating system as part of our OS course, and so far
we've had to read keys from the keyboard, write to the screen, etc...

I decided it'd be neat-o-kool to have the keyboard LEDs working, so I
started playing around with blasting various values into the keyboard data
port. If anyone has a Sun 4 keyboard that uses a z8530 chip, you have to
blast the value 14 into the port, then blast a masked value corresponding to 
which LED lit.

People should write better manuals that document this stuff.

				-Kartik
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