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:
May. 12, 1998
Filed:
Jul. 25, 1996
Applicant:
Inventors:
David K Cassetti, Tempe, AZ (US);
Philip Wszolek, Phoenix, AZ (US);
Assignee:
VLSI Technology, San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
711135 ; 711143 ;
Abstract
A cache memory system operates without requiring valid bits in the external cache tag RAM by employing a system controller as a writeback cache controller for control of the cache data/tag memory and the system main memory. The system controller receives signaling information from a CPU through a host bus to indicate when to pre-load the cache memory or to flush (disable) the cache memory while maintaining memory coherencey by causing the cache controller to write back all modified lines in the cache memory to the main memory.