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.

Date of Patent:
Apr. 11, 1995

Filed:

Jun. 30, 1993
Applicant:
Inventors:

John A Denisco, Malden, MA (US);

Arthur J Beaverson, Boxborough, MA (US);

Assignee:

Digital Equipment, Maynard, MA (US);

Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ; G06F / ;
U.S. Cl.
CPC ...
364580 ; 364578 ; 364400 ; 395375 ; 395400 ; 395425 ;
Abstract

An arrangement for a multiprocessor RISC system enables each CPU of the system to test the control logic of its cache by indirectly examining states of the caches and comparing those states to predetermined valid cache states of the system. The arrangement includes a plurality of processes configured to acquire information from selected block entries of the caches. The information is then compared with an array of predetermined valid cache states contained in a state table to detect invalid cache states. A cache examining protocol defines the operational procedures followed by the processes when acquiring and examining the information.


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Denisco, John. (1995). Multiprocessor cache examiner and coherency checker (U.S. Patent No. 5406504). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5406504

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