System for operating a plurality of graphics displays from a sin

Details System for operating a plurality of graphics displays from a sin System for operating a plurality of graphics displays from a sin

1991-06-04

1994-12-20

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural display systems

Tiling or modular adjacent displays

345200, G09G 500

Patent

active

053749405

ABSTRACT:
Multiple video boards of the general purpose type (e.g. EGA or VGA boards) and their associated monitors are operated by a single computer of the personal computer type, without modification of the computer hardware and while the video boards reside in their usual expansion slots which are provided by connectors on the mother board of the personal computer by a system which utilizes a flexible printed circuit board containing circuits which allows the processor (CPU) of the computer to present address and data signals which operate circuitry on the flexible boards to selectively enable or inhibit the communication of control signals (on the I/O and memory read and write control lines) to the video boards thereby enabling them to generate graphical images for their associated monitors. The signals on the address control and data lines are tapped and relayed either directly or after processing to the associated video board thereby enabling multiple video boards of the same or different types to be used concurrently by appropriate programming of the computer without the need to interchange hardware to switch between displays thereby reducing the inconvenience and potential hardware damage necessarily incident to such a hardware interchange procedure.

REFERENCES:
patent: 4015422 (1977-04-01), Van Haaften
patent: 4217646 (1980-08-01), Caltagirone et al.
patent: 4800376 (1989-01-01), Luga et al.
patent: 4922448 (1990-05-01), Kurieda et al.
patent: 5012229 (1991-04-01), Lennon et al.
patent: 5021770 (1991-06-01), Aisaka et al.
patent: 5039937 (1991-08-01), Mandt et al.

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