Videologic Limited

Accelerix Limited

Dennis A Fielder

Peter B Gillingham

Cormac Michael O'Connell

Trevor R Stockill

James H Derbyshire

Anthony P Marlton

Randy R Torrance

Victor G Halsted

Victor G Halstead, Deceased

Randall R Torrance

Memory devices

A single chip display processor comprised of a dynamic random access memory (DRAM) for storing at least one of graphics and video pixel data, a pixel data unit (PDU) for processing the pixel data, integrated in the same integrated circuit (IC) chip as the DRAM, the IC chip further comprising a massively parallel bus for transferring blocks of pixel data at the same time from the DRAM to the PDU, whereby the PDU can process the blocks of pixel data for subsequent display of processed pixel data.

Single chip frame buffer and graphics accelerator

A computer based video/graphics display system includes a computer system having a graphics generator. A video signal from a video source is fed through an input stage to an asynchronous converter. The converter synchronizes the video signal to the graphics generator. The output from the asynchronous converter and the output from the graphics generator are fed to a fading/mixing matrix. The combined signal output from the fading/mixing matrix is fed to a computer display monitor. The display monitor is synchronized to the graphics generator, and the video signal is input asynchronously. Circuitry is provided for displaying at least a portion of the video image together with the graphics image on the display. One or more video images can be manipulated, stored, and displayed in window areas on the display monitor. A picture can be built-up by combining several still images. The system allows the mixing and windowing of computer graphics and one or more video images together on the screen.

Computer based display system allowing mixing and windowing of graphics

A base board 10 carries four daughter cards 12a, 12b, 12c and 12d. Three of the daughter boards 12a, 12b, 12c are stacked on the front side of the base board 10, and the fourth daughter board 12d is carried on the rear side of the base board 10. Modifying means are provided on the daughter cards for modifying addresses sent from the base card to the daughter cards. This allows the daughter cards 12 to be identical, and still enables individual addressing of the daughter boards according to their position in the stack.

Address bus for stackable computer board connectors

A computer based video/graphics display system includes a computer system (22) having a graphics generator (24). A video signal from a video source (28) is fed through an input stage (26) to an asynchronous converter (30). The converter (30) synchronises the video signal to the graphics generator (24). The output from the asynchronous converter (30) and the output from the graphics generator (24) are fed to a fading/mixing matrix (34). The combined signal output from the fading/mixing matrix is fed to a computer display monitor (14). The system allows the mixing or windowing of computer graphics and a video image on a common display.

Computer based video/graphics display system

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Linton, United Kingdom

Dennis A Fielder