Color palette having multiplexed color look up table loading

Details Color palette having multiplexed color look up table loading Color palette having multiplexed color look up table loading

1986-04-28

1989-01-17

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340734, 340799, G09G 116

Patent

active

047990538

ABSTRACT:
The present invention loads color registers of a color look up table in a color palette and recalls color data words from the color registers using only a single set of address and data channels. The color palette operates in two modes. In a normal mode one color code from a stream of pixel color codes received from a pixel map memory is employed to select one of the color registers. These color registers store color data words which define colors. A color data word stored in a selected color register is recalled and employed to control the color of a pixel on a raster scan video display. In a color look up table load mode, a predetermined number of the pixel color codes are loaded into the color look up table in a predetermined sequence, thereby defining a new set of colors. This technique multiplexes the existing data and control lines from the memory to the color palette for the two modes.

REFERENCES:
patent: 4258361 (1981-03-01), Hydes et al.
patent: 4481594 (1984-11-01), Staggs et al.
patent: 4580134 (1986-04-01), Campbell et al.

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