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Block oriented random access memory able to perform a data read, a data write and a data refresh operation in one block-access time

Image Number 2 for United States Patent #4823302.

A video memory system which uses dynamic digital data storage elements allows random access to blocks of 32 pixel values. The pixel values to be stored in a block are applied sequentially to the memory system and the pixel values provided by the memory system are provided sequentially. The block oriented random access memory which stores and provides the blocks of 32 pixel values is configured to be able to perform a block read, a block write and a refresh operation in the time required to provide one 32 pixel block to or from the video memory system.

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