Video graphics display memory swizzle logic circuit and method

Details Video graphics display memory swizzle logic circuit and method Video graphics display memory swizzle logic circuit and method

1992-06-11

1993-12-07

Harkcom, Gary V.

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

395164, 345202, G06F 1202, G09G 102

Patent

active

052690016

ABSTRACT:
A circuit and method of operation which controls the reordering of data as it is transferred from one memory to another. The data to be reordered is stored in a memory such that the ordinate bit position within a data word is uniquely associated with a particular input to a data bus. The bus inputs, however, are connected to the VRAM in an arrangement contrary to the desired ordinate association with the compressed data word. A swizzle logic circuit operates to allow graphic compressed data to be reordered for presentation to the block-write inputs of a VRAM.

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K. Takuji, "Picture Enlarging Device", Matsushita Electric Ind. Co., Ltd., Patent Abstract of Japan, Sep. 5, 1988, Application No. JP860251124.

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