Looking at the Pinout of a Gameport we directly see the pins used to power the Gameport: 1, 8, 9 for VCC (5V) and 4, 5 for GND. I found them to not 100% match the reality but backed with all that Information I was able to reverse engeneer the Protocol used to talk to the "Precision Pro"-Joystick, analyze and use the received data. The explanations in that Patent were the Basis of my Experiments with the Device I have. Reading through Google and Wikipedia I stumbled across US Patent 5628686 which is titled as "Apparatus and Method for bidirectional Data Communication in a Game Port" and explains a Method used to communicate digitally through a traditional analog-style Gameport. I plan on building a Quadrocopter soon and it seemed like the perfect device to control such a flying vehicle. Since the old days of gaming with a joystick (they have all vanished, do they?) I have an Microsoft Sidewinder Precision Pro lying around here. AVR Interface to Microsoft SideWinder Gamecontrollers
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