Graphic processor suitable for graphic data transfer and convers

Details Graphic processor suitable for graphic data transfer and convers Graphic processor suitable for graphic data transfer and convers

1990-06-27

1993-04-13

Harkcom, Gary V.

Communications: electrical

Land vehicle alarms or indicators

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

395164, 395131, 340750, G06F 312

Patent

active

052029620

ABSTRACT:
A graphic processor which controls reading, writing and transfer of graphic data for a display memory that stores graphic data. The processor includes a first unit which stores first address information for addressing the display memory and first pixel address information which points a pixel position in a word specified by the first address information, a second unit which stores second address information for addressing the display memory and second pixel address information which points a pixel position in a word specified by the second address information, a third unit which shifts graphic data of multiple pixels included in two consecutive words to extract continuous 1-word graphic data, and a fourth unit which implements drawing computations pixel-wise concurrently for one word depending on the number of pixels included in a word. Even if transfer source graphic data lies across two consecutive words, the processor fetches the source data in single reading, processes the data word-wise at once, and stores the result in the display memory.

REFERENCES:
patent: 4639865 (1987-01-01), Martin
patent: 4796221 (1989-01-01), Tokumitsu
patent: 4908874 (1990-03-01), Gabriel
patent: 4912631 (1990-03-01), Lloyd
patent: 4937785 (1990-06-01), Deering
patent: 4941108 (1990-07-01), Aoyagi et al.
patent: 4941193 (1990-07-01), Barnsley et al.
patent: 5007102 (1991-04-01), Haskell

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