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:
Jun. 23, 1992
Filed:
Sep. 01, 1989
Forrest M Phillips, Chelmsford, MA (US);
Bull HN Information Systems Inc., Billerica, MA (US);
Abstract
A virtual memory management cache memory system has a plurality of directory and buffer store levels for storing page descriptor information. The cache memory directories and a least recently used (LRU) apparatus for replacing information within the buffer store on a least recently used basis are constructed from the same type of standard cache address directory part. Programmable control circuits generate the required input data and control signals which are applied to the LRU apparatus for obtaining signals which indicate a next level to be replaced on a least recently used basis and for updating the contents of the LRU apparatus on a most recently used basis.