Video memory with write mask from vector or direct input

Details Video memory with write mask from vector or direct input Video memory with write mask from vector or direct input

1990-06-29

1993-03-30

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

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

340750, G09G 102

Patent

active

051988046

ABSTRACT:
A video memory includes a data storage section having a predetermined bit width of data writing and reading. A data input terminal has a predetermined bit width and is subjected to input data which represents at least a write start position and a write end position. Mask data are generated on the basis of the write start position and the write end position represented by input data. The mask data are fed to the data storage section. Write data are generated. The write data are fed to the data storage section. The bit width of data writing and reading of the data storage section is greater than the bit width of the data input terminal.

REFERENCES:
patent: 4689741 (1987-08-01), Redwine et al.
patent: 4757473 (1988-07-01), Kurihara et al.
patent: 4773026 (1988-09-01), Takahara et al.
patent: 4802118 (1989-01-01), Honda et al.
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patent: 4876663 (1989-10-01), McCord
patent: 4920504 (1990-04-01), Sawada et al.
patent: 4943801 (1990-07-01), Oguchi
Pinkham et al., "A 128K.times.8 70MHz Video RAM with Auto Register Reload", IEEE Solid-State Circuits Conference, Feb. 17-19, 1988, New York, U.S.A., pp. 236, 237, and 384.

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