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:
Jul. 05, 1988
Filed:
Jun. 27, 1985
Andrew W Wilson, Jr, Pittsburgh, PA (US);
Steven J Frank, Southboro, MA (US);
Encore Computer Corporation, Marlboro, MA (US);
Abstract
A caching system for a shared bus multiprocessor which includes several processors each having its own private cache memory. Each private cache is connected to a first bus to which a second, higher level cache memory is also connected. The second, higher level cache in turn is connected either to another bus and higher level cache memory or to main system memory through a global bus. Each higher level cache includes enough memory space so as to enable the higher level cache to have a copy of every memory location in the caches on the level immediately below it. In turn, main memory includes enough space for a copy of each memory location of the highest level of cache memories. The caching can be used with either write-through or write-deferred cache coherency management schemes.