Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1988-10-14
1990-09-18
Brier, Jeffery A.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340701, 340798, 340799, G09G 540
Patent
active
049581465
ABSTRACT:
A mulitplexor implementation of circuitry for performing Boolean raster operation in a workstation whose functions include the display of graphics images using multiple planes and having foreground and background colors. The invented circuitry includes a plane raster-op select circuit and Boolean raster-op circuit. The plane raster-op select circuit selects a Boolean raster operation to be performed for each plane of graphics information as a function of foreground and background color control signals. The selected Boolean raster operation for each plane is then input to set of mulitplexors and the selected Boolean raster operation is performed on the control inputs to the multiplexors which combines source and destination data for each plane according to the selected Boolean operation for that plane.
REFERENCES:
patent: 4509043 (1985-04-01), Mossaides
patent: 4641282 (1987-02-01), Ounuma
patent: 4689613 (1987-08-01), Ikeda
patent: 4742474 (1988-05-01), Knierim
patent: 4766431 (1988-08-01), Kobayashi et al.
Malachowsky Chris
Priem Curtis
Webber Thomas
Brier Jeffery A.
Sun Microsystems Inc.
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