Boots – shoes – and leggings
Patent
1993-07-06
1995-11-21
Chan, Eddie P.
Boots, shoes, and leggings
364DIG1, 36424691, 3642384, 365222, G06F 1202
Patent
active
054695597
ABSTRACT:
A system for refreshing selected portions of a dynamic access memory (DRAM) subsystem of a computer. A memory controller of the present invention includes a RAM device for storing a plurality of region descriptors used to inhibit the refresh of address ranges of the DRAM that do not contain valid data, thereby conserving energy required to refresh the entire DRAM. The controller includes logic circuitry connected between a refresh period timer and the RAM device for inhibiting receipt by a RAS generator of a refresh pulse when a generated refresh address falls within the refresh address range defined by the region descriptor. A refresh address output by a refresh address counter compared to the region descriptors in the RAM device, and if the region descriptors indicate that the row addressed by the refresh address does not contain valid data, the RAS generator is inhibited from producing a RAS pulse. Logic instructions are inserted into memory allocation and memory deallocation subroutines of the computer's operating system for writing the region descriptors to the RAM device.
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Parks Terry J.
Register David S.
Chan Eddie P.
Dell USA L.P.
Huffman James
McCombs David
Nguyen Hiep T.
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