Apparatus for angularly scanning memory addresses

Details Apparatus for angularly scanning memory addresses Apparatus for angularly scanning memory addresses

1980-12-18

1983-06-07

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340725, 340750, G09G 116

Patent

active

043873707

ABSTRACT:
A memory with a plurality of memory planes parallelly addressed by row and by column is used to store digitally generated graphic information for constructing a video display--e.g., on the screen of a kinescope or other cathode ray tube. Angular scanning of the memory addresses is provided by accumulating in tangent or cotangent of the scanning angle and using its integer part as one of the row and column addresses and by counting the cycles of accumulation to provide the other of the row and column addresses.

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patent: 3944997 (1976-03-01), Swallow
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patent: 4127850 (1978-11-01), Vallins
patent: 4222048 (1980-09-01), Johnson
patent: 4228432 (1980-10-01), Osborne
patent: 4241412 (1980-12-01), Swain
patent: 4245321 (1981-01-01), Gennetten
patent: 4271476 (1981-06-01), Lotspeich

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