Video ram write control apparatus

Details Video ram write control apparatus Video ram write control apparatus

1986-09-29

1988-02-23

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340726, 340789, 340798, G09G 100

Patent

active

047273631

ABSTRACT:
A video RAM write control apparatus cmprises a video RAM of byte access for storing dot pattern data, and a write circuit for supplying write data of one byte and a write enable signal to the video RAM. The video RAM includes n (n being an arbitrary natural number) memory blocks, each consisting of 1 bit.times.N addresses, the same address being assigned to the n-bits word. The write circuit includes a bit mask register in which an n-bit bit mask pattern data having a flag in a specific bit is set, and NAND gates for supplying AND signals of an output of each bit of the bit mask register and a write enable signal to the write enable terminal of each memory block.

REFERENCES:
patent: 4016544 (1977-04-01), Morita et al.
patent: 4280186 (1981-07-01), Hidai et al.
patent: 4296475 (1981-10-01), Nederlof et al.
patent: 4386773 (1983-06-01), Bronstein
patent: 4424572 (1984-01-01), Lorig et al.
patent: 4462028 (1984-07-01), Ryan et al.
patent: 4491836 (1985-01-01), Collmeyer et al.

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