Static information storage and retrieval – Read/write circuit – Having particular data buffer or latch
Patent
1983-05-24
1987-02-03
Popek, Joseph A.
Static information storage and retrieval
Read/write circuit
Having particular data buffer or latch
365230, 340703, G11C 700, G09B 128
Patent
active
046412824
ABSTRACT:
A memory system is used in a display or printing system for displaying or printing a picture pattern by processing picture data obtained by a function generator. The memory system has memory planes for storing picture data, registers provided in one-to-one relationship with the memory planes for latching the picture data read from the memory planes, and arithmetic logic units provided in one-to-one relationship with the memory planes for performing logical operations on the picture data latched in the registers and obtained by the function generator. The memory system also has an operation mode register storing operation mode data. The arithmetic logic units perform logical operations according to the operation mode data supplied from the operation mode register. The results of the operations are simultaneously written into the respective memory planes.
REFERENCES:
patent: 3473160 (1969-10-01), Wahlstrom
patent: 4016544 (1977-04-01), Morita et al.
patent: 4149184 (1979-04-01), Giddings et al.
patent: 4150364 (1979-04-01), Baltzer
"Dedicated VLSI Chip Lightens Graphics Display Design Load", by Gary DePalma et al, Computer Graphics, Article Reprint, AR-255, Jan. 1983.
Data Sheet GDC uPD 7220, Mar. 26, 1982, Nippon Electronics Co., Ltd., IEM-734C.
Popek Joseph A.
Tokyo Shbaura Denki Kabushiki Kaisha
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