Video sound and system control circuit
First Claim
1. A programmable audio and video display driver circuit, as connected to a video game/home computer, is capable of driving a color television type audio/video display, independently of the video game/home computer main circuitry, comprising:
- a bus architecture for transfering data and instructions;
a microprocessor connected to said bus architecture;
at least one read-only memory (ROM) connected to said bus architecture and able to receive address instructions and supply data thereto;
at least one dynamic random access memory (RAM) connected to said bus architecture and able to receive and supply data and instructions thereto;
at least one Schottky-type driver circuit connected to drive said random access memory under address instructions from said microprocessor through said bus architecture connection;
keyboard means;
a joy stick input connected to said microprocessor;
a source of software instructions connected to input a program to said microprocessor; and
an interface circuit connected to said bus architecture to receive and send data and instructions from said microprocessor and connected to said keyboard means, said interface circuit being connected to supply signals to each said Schottky driver and to each said RAM and to receive signals from each said RAM, said interface circuit providing audio and video display signals usuable by said color television type display and wherein interface circuit contains therein a two-speed clock and a three oscillator voice generator.
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Accused Products
Abstract
Programmable I/O (input/output) interface circuitry provides video and audio signals, needed for a video computer/game, to a commercial color television type display/monitor and may be implemented in HMOS, (H type metal oxide semiconductor) large-scale-integrated circuitry. The system architecture allows for reduced chip count, and improved reliability while providing adequate synchronization pulses, luminance level signals, chrominance phase shift signals, raster control and cursor control video and three independently controlled audio voices. A software selectable keyboard latch input, plural speed processing for faster operation when outside the active display area or during blanking, all system control signals necessary for system operation and 3 independently controlled interrupt generating timers are also provided.
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Citations
7 Claims
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1. A programmable audio and video display driver circuit, as connected to a video game/home computer, is capable of driving a color television type audio/video display, independently of the video game/home computer main circuitry, comprising:
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a bus architecture for transfering data and instructions; a microprocessor connected to said bus architecture; at least one read-only memory (ROM) connected to said bus architecture and able to receive address instructions and supply data thereto; at least one dynamic random access memory (RAM) connected to said bus architecture and able to receive and supply data and instructions thereto; at least one Schottky-type driver circuit connected to drive said random access memory under address instructions from said microprocessor through said bus architecture connection; keyboard means; a joy stick input connected to said microprocessor; a source of software instructions connected to input a program to said microprocessor; and an interface circuit connected to said bus architecture to receive and send data and instructions from said microprocessor and connected to said keyboard means, said interface circuit being connected to supply signals to each said Schottky driver and to each said RAM and to receive signals from each said RAM, said interface circuit providing audio and video display signals usuable by said color television type display and wherein interface circuit contains therein a two-speed clock and a three oscillator voice generator. - View Dependent Claims (2, 3, 4)
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5. A programmable interface controller circuit for an audio and video display driver circuit, which is to provide audio and video information to a commercial television type display, to display video game/home computer information, said driver circuit being connected as part of a video game/home computer and having as a portion thereof, apart from said computer'"'"'s arithmetic microprocessor and other circuitry, its own microprocessor, memory, information buses, user input and software input, comprising:
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means, connected to said driver circuit microprocessor and memory, for programmably setting a voice, said voice being a mix of three different frequency generators as a part thereof, two of which providing square wave signals and the third being selectable between a square wave and white noise; means, connected to said voice setting means, for generating video color character and high resolution color graphics display signals according to program instructions received; means, connected to said driver cirucit information buses and memory, for providing control if said information buses and said memory; and input/output connections means for connecting said voice setting means and said video color character and graphics generating means to a commercial television type display. - View Dependent Claims (6, 7)
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Specification