This invention relates to the field of micro-circuits for video games and personal computers, especially those implemented in MOS (metal oxide semiconductor) technology where circuit implementation is provided with LSI chip size as a consideration. It further relates to the circuits used to control and interface peripheral devices in such a computer system where bus time is allocated and priority for bus accessing is a factor.
Dash, U.S. Pat. No. 4,034,983, shows a video game computer circuit with audio and pot interfacing. Dash's circuitry includes an analog mapping circuit for receiving input signals for a pair of paddle controls, an interface circuit, and a sound signal generator circuit for driving an audio speaker.
Best, U.S. Pat. No. 4,445,187, shows a video game circuit with an audio-dialog. A tape cartridge as opposed to a disk is interfaced to the circuit. Audio output circuits are implemented.
Sukonick, U.S. Pat. No. 4,070,710, shows a peripheral device (here a video display) control and interface circuit utilizing data bus and address bus architecture.
Other circuits have followed which have improved upon thses circuits to one degree or another.
USPTO Backgrounds
USPTO Backgrounds