1994-04-28
1995-09-05
Nguyen, Phu K.
G06F 1562
Patent
active
054486890
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: 4549172 (1985-10-01), Welk
patent: 4667295 (1987-05-01), Preston, Jr.
patent: 4680720 (1987-07-01), Yoshii et al.
patent: 4720871 (1988-01-01), Chambers
patent: 4769632 (1988-09-01), Work et al.
patent: 4965750 (1990-10-01), Matsuo et al.
patent: 5319750 (1994-07-01), Matsuo et al.
Motorola M68000 Programmer's Reference Manual, 5th Edition 1986, pp. 2-1, B58-B59.
"Performance Evaluation of Various Enlargement/Reduction Methods" Information Processing Society of Japan, vol. 26, No. 5, Sep. 1985.
Katsura Koyo
Matsuo Shigeru
Sato Jun
Sone Takashi
Yokoyama Masakatu
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
Nguyen Phu K.
LandOfFree
Graphic data processing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Graphic data processing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graphic data processing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-480036