Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!samsung!sol.ctr.columbia.edu!emory!athena.cs.uga.edu!mcovingt
From: mcovingt@athena.cs.uga.edu (Michael A. Covington)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: What can you do with a PC game port?
Message-ID: <1991Mar30.065039.27920@athena.cs.uga.edu>
Date: 30 Mar 91 06:50:39 GMT
References: <40093@netnews.upenn.edu>
Distribution: na
Organization: University of Georgia, Athens
Lines: 16

You can measure resistance from about 0 to 200K (which is what a joystick
is), or current from 0 to some few mA, or various other things. Also,
you *can* output through a game port, in an odd way: when the joystick
positions are sensed, a pulse appears.

I did an article about game ports for PC Tech Journal around 1985.
This should be in your library. It's just the beginning, but it does give
some nice temperature- and voltage-measuring circuits.

Oh, by the way, you have +5V and ground at the game port connector.
You could power all sorts of peripherals with it.
-- 
-------------------------------------------------------
Michael A. Covington | Artificial Intelligence Programs
The University of Georgia  |  Athens, GA 30602   U.S.A.
-------------------------------------------------------