Display controlling apparatus

Details Display controlling apparatus Display controlling apparatus

1984-04-12

1985-01-01

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340723, 340750, G09G 116

Patent

active

044918348

ABSTRACT:
A display control system has a memory for storing display information and a memory access circuit for reading display information out of this memory. This memory access circuit includes a first circuit in which a memory address is set, a second circuit for sequentially varying the memory address by a predetermined value, and a third circuit for adding to the memory address a preset value, which is different from the predetermined value. A control circuit gives a designation of the addresses to the memory, as a result of the cooperation of the second circuit and the third circuit. The control circuit can be achieved so that display information is read while a memory address may be varied by at least two different means (the second and third circuits above). Thus, it becomes possible to selectively designate a part of a memory region and to display the information of the selected memory region.

REFERENCES:
patent: 3242470 (1966-03-01), Hagelbarger et al.
patent: 3614766 (1971-10-01), Kievit
patent: 3742482 (1973-06-01), Albrecht et al.
patent: 4320395 (1982-03-01), Meissen
patent: 4375638 (1983-03-01), O'Keefe
patent: 4386410 (1983-05-01), Pandya et al.

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