Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1997-01-06
1997-12-09
Tung, Kee M.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
39549704, 395405, 395501, 395521, 345189, G06T 160
Patent
active
056969457
ABSTRACT:
A video subsystem of a computer processor is shown to include a graphics controller coupled to a video memory. A method for improving graphics performance for applications which use fewer bits per pixel than provided in the graphics subsystem includes the steps of rearranging the pixel and byte data in video memory such that corresponding bytes of different pixels are stored in different, simultaneously accessible locations of the video memory. With such an arrangement, accesses to video memory may be provided which utilize all of the available bytes of the video memory bus, thereby increasing the performance of the graphics operation. In addition, a graphics system having a plurality of independently operating memory controllers is shown to further improve graphics performance by ensuring that the video memory bus operates at full capacity.
REFERENCES:
patent: 4005389 (1977-01-01), Penzel
patent: 4745407 (1988-05-01), Costello
patent: 5303200 (1994-04-01), Elrod et al.
IBM Microelectronics Catalog, RGB561, Workstation Graphics, Preliminary Rev. 1.0, Mar. 23, 1994, pp. i-66.
Gianos Christopher C.
McCormack Joel J.
McNamara Robert S.
Seiler Larry D.
Digital Equipment Corporation
Fisher Arthur W.
Pappas Joanne N.
Ross Gary E.
Tung Kee M.
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