Abstract: A common game controller is compatible with multiple platforms including game devices and general purpose processors. The common controller can be utilized by both developers and users. Game software can easily be implemented on multiple platforms. Common source code can be developed and compiled to run on multiple systems, for example XBOX 360®, WINDOWS XP®, and WINDOWS® VISTA. Users only have to learn and get familiar with a single game controller. The common controller includes a Universal Serial Bus (USB) compatible interface allowing the controller to be coupled to multiple types of platforms. The common controller can also include a wireless interface.

Abstract: A force feedback joystick unit connected to the serial port of a personal computer applies a variety of force effects to the joystick handle in response to commands from the executing personal computer program. Forces are applied to the joystick, which is mounted on a gimbal support for movement in two degrees of freedom, by a pair of drive motors which operate under the control of a digital signal processor (DSP). The DSP is programmed to respond to predetermined commands issued by a program executing on the personal computer to produce basic force effects including a constant force, a spring force proportional to the displacement of the joystick handle from a reference, a damping force proportional to the velocity of the joystick, and a time varying force effect having a selectable waveform, magnitude and period. More complex forces effects are produced by combining the basic effects.