Computer graphics processing and selective visual display system – Display peripheral interface input device – Including keyboard
Patent
1995-12-27
1998-03-31
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Including keyboard
345184, 463 37, 463 29, G09G 500
Patent
active
057343764
ABSTRACT:
A joypad circuit for playing PC games includes a switching circuit connected between a PC and a keyboard, a microprocessor connected to the switching circuit for blocking signals from the keyboard and controlling the operation of the PC, a memory connected to the microprocessor for storing data from the keyboard during a setting mode, a plurality of switches for a user to select a desired function, a button processing circuit connected to the microprocessor for selecting a plurality of data stored in the memory in response to the user's selection to the switches, a special control circuit for performing special control of the PC when the number of the switches is not enough to control the PC, and a mode selecting circuit connecting with the microprocessor for selecting a desired operation mode.
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patent: 5184830 (1993-02-01), Okada et al.
patent: 5317505 (1994-05-01), Karabed et al.
patent: 5531443 (1996-07-01), Cruz
patent: 5557299 (1996-09-01), Maynard et al.
patent: 5645277 (1997-07-01), Cheng
Hjerpe Richard
Tran Vui T.
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