Static information storage and retrieval – Read/write circuit – Sipo/piso
Patent
1983-12-30
1988-05-24
Moffitt, James W.
Static information storage and retrieval
Read/write circuit
Sipo/piso
365240, 340799, G11C 800
Patent
active
047470810
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 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, column address to the RAM unit is also used to instruct and actuate a suitable decoder circuit to select the tap appropriate to unload the portion of the shift register containing only the data bits of interest.
REFERENCES:
patent: 3930239 (1975-12-01), Salters et al.
patent: 4412313 (1983-10-01), Ackland et al.
patent: 4498155 (1985-02-01), Rao
patent: 4541075 (1985-09-01), Dill et al.
patent: 4562435 (1985-12-01), McDonough et al.
Guttag Karl M.
Heilveil Andrew
Novak Mark F.
Pinkham Raymond
Redwine Donald J.
Anderson Rodney M.
Comfort James T.
Moffitt James W.
Sharp Melvin
Texas Instruments Incorporated
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