Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!ukma!jayh
From: jayh@ms.uky.edu (Jay Hofacker)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: 2 Game Ports, how's it done?
Message-ID: <1991May22.024043.19254@ms.uky.edu>
Date: 22 May 91 02:40:43 GMT
References: <7604@rex.cs.tulane.edu>
Distribution: usa
Organization: University Of Kentucky, Dept. of Math Sciences
Lines: 12


   One 15 pin game port contains all the signals for 2 joysticks (4 positions
and 4 switches), so the Y adapters actually pass the signals straight through
to the first joystick and swap them for the second joystick.  The cards that
provide two ports simply do this splitting on the card, rather than in a Y 
cable.  The game port does not use an IRQ line, but it does have a standard
port address, so you can only have one game port on a system, unless you had
a specially configured card and specially written software.

-- 
Jay Hofacker, sysop of the Audio/Visual Exchange, (606)254-1751 3/12/24 MNP 5
Mail: jayh@ms.uky.edu / uk02779@ukpr.uky.edu -- Yes, my signature is only 2 lin