Method and apparatus for performing a read-write-modify operatio

Details Method and apparatus for performing a read-write-modify operatio Method and apparatus for performing a read-write-modify operatio

1993-04-21

1994-03-22

Ray, Gopal C.

Static information storage and retrieval

Magnetic bubbles

Guide structure

395164, 36518901, 3642372, 3642373, 3642383, 3642624, 3642842, 364DIG1, 345133, G06F 1562, G06F 1200

Patent

active

052972712

ABSTRACT:
A VGA controller with a read-modify-write cycle implemented therein is provided. By implementing the read-modify-write cycle in hardware, and by reducing the data for such operations to a single address source, read-modify-write operations can be performed in a single cycle, as opposed to separate read and write cycles, with a consequent improvement in overall operating speed.

REFERENCES:
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patent: 4695967 (1987-09-01), Kodama et al.
patent: 4941107 (1990-07-01), Haseke
patent: 5043918 (1991-08-01), Murahashi
patent: 5109520 (1992-04-01), Knierim
patent: 5115510 (1992-05-01), Okamoto et al.
patent: 5175838 (1992-12-01), Kimura et al.

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