The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1985
Filed:
Mar. 25, 1982
Lee E Gallaher, Glen Ellyn, IL (US);
Wing N Toy, Glen Ellyn, IL (US);
Benjamin Zee, Glen Ellyn, IL (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A cache memory system reduces cache interference during direct memory access block write operations to main memory. A control memory within cache contains in a single location validity bits for each word in a memory block. In response to the first word transferred at the beginning of a direct memory access block write operation to main memory, all validity bits for the block are reset in a single cache cycle. Cache is thereafter free to be read by the central processor during the time that the remaining words of the block are written without the need for additional cache invalidation memory cycles.