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:
Apr. 24, 1990
Filed:
Oct. 14, 1988
Gary N Hammond, San Jose, CA (US);
Michael D Taylor, San Jose, CA (US);
Nongnuch Taylor, San Jose, CA (US);
Amdahl Corporation, Sunnyvale, CA (US);
Abstract
In a data processing system in which a processor has a cache receiving data staged from at least two main memories. Performance is enhanced by providing an indicator identifying the main memory from which data is staged. When data in the cache is destaged, the indicator is used to direct the destaged data to the proper main memory. If an error occur in the indicator, the data will be destaged to each main memory where a check is made on the address of the data to determine whether the main memory is the source of the destaged data. The data is stored in a main memory only if the memory is the source thereof.