Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1990-03-02
1994-01-18
Lee, Thomas C.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
345275, 365203, 36523003, 365233, 3652385, 36518902, 3642383, 3642384, 36492797, 364DIG1, 371 48, G06F 1312, G06F 1206
Patent
active
052806014
ABSTRACT:
A method for temporarily storing and retrieving 8-bit character information data for a magnetic disk information storage system in a number of 4.times.n DRAM buffer memory configurations. A virtual memory address for each of said 8-bit information characters is provided and each of the characters are organized into a 16-byte block. The virtual memory addresses are translated to corresponding addresses of memory locations in said 4.times.n buffer memory unit for storage of 4-bit groups of said 16-byte block in said 4.times.n DRAM buffer memory by selecting a row address for storage of said 16-byte block, by selecting a base column address for said 16-byte block, and by successively incrementing said base column address by 4 to provide additional column address for successive 4-bit groups of said 16-byte blocks. Each of said 4-bit groups of said 16-byte block are transferred through a 4-bit data bus to the various predetermined address locations in one of said 4.times.n DRAM buffer memory configurations as determined by the translating step. An 8-bit parity word for the 16-byte block is stored in a separate part of the 4.times.n memory.
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Desai Dhiru N.
Lewis David M.
Lee Thomas C.
Lintz Paul
Seagate Technology Inc.
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