Thrustmaster F22 Joystick to control servos

Hi there, I'm thinking about trying to use a microcontroller (AVRMega128) to read from an old Thrustmaster F22 port and then move some servos to eventually make some small "rocket turrer" for the office, like those that u can buy at thinkgeek. The fact is that I've searched for the specifications of a 15 pin joystick port and it says they were originally made to support two two-buttons joysticks, that means, two pins to control X and Y axis and other two for buttons, and the same for the eventual second joystick...funny, because mine is only one and it has 8 buttons, 4 ordinary and 4 to control the views...Do u know were to get the specifications of thrustmaster F22 joystick port? thanx