Static information storage and retrieval – Read/write circuit – Sipo/piso
Patent
1990-05-09
1992-11-10
Popek, Joseph A.
Static information storage and retrieval
Read/write circuit
Sipo/piso
36523009, 365240, 340799, G11C 700
Patent
active
051630249
ABSTRACT:
In a video-type computer system and the like, an improved memory circuit is provided for adapting the system to CRT screens having different resolutions. The memory circuit includes a bit-mapped RAM unit or chip having sufficient cells to accommodate any CRT screen sought to be used, and also a serial shift register having taps at a plurality of different locations corresponding to different columns of cells in the RAM unit. When the RAM unit is in serial mode, a row of data is transferred into the serial shift register. Then the column address applied to the RAM unit is used to instruct and actuate a suitable decoder circuit to select the tap appropriate to unload the portion of the serial shift register containing the data bits of interest.
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Electronic Design, Novak et al., pp. 183-188, Jul. 21, 1983, "Inside Graphic Systems, From Top to Bottom".
Electronic Design, Pinkham et al., pp. 161-171, Aug. 18, 19, 1983, "Video RAM Excels at Fast Graphics".
Guttag Karl M.
Heilveil Andrew L.
Novak Mark F.
Pinkham Raymond
Redwine Donald J.
Bassuk Lawrence J.
Donaldson Richard L.
Havill Richard B.
Popek Joseph A.
Texas Instruments Incorporated
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