Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1995-07-31
1998-08-11
Lao, Lun-Yi
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345157, 463 38, G09G 508
Patent
active
057933561
ABSTRACT:
A digital joystick operates in a digital mode or an analog emulation mode. In the digital mode, the joystick generates digital data indicating the position of a control stick and the status of buttons and transmits the digital data to the computer. The joystick may be coupled to the computer through a game port or a conventional interface port. Computer software operating within the computer can receive digital data directly from the joystick if it is operating in the digital mode. When in the analog emulation modes the joystick emulates resistances related to the position of the control stick. The emulated resistance data emulates the value of corresponding resistances in a conventional joystick. The resistance values may be derived from a programmable resistor, a programmable impedance, or a programmable current source. Multiplexers may also be used to couple the appropriate resistance value to the conventional game port input.
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Adan Manolito E.
Kash Richard B.
Pierce John G.
Suzuki Hajime
Svancarek Mark K.
Lao Lun-Yi
Microsoft Corporation
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