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. 03, 1988
Filed:
Aug. 30, 1983
Theodore S Robinson, Cupertino, CA (US);
Donald L Hanson, Los Altos Hills, CA (US);
Gary A Woffinden, Scotts Valley, CA (US);
Amdahl Corporation, Sunnyvale, CA (US);
Abstract
Access control to a high speed data buffer in a data processing machine is bypassed in order to enhance the speed of access of data which must be retrieved from a large capacity main storage facility without requiring additional circuitry in the data processing machine. Access control normally requires an entire line of data to be present in a cache before allowing a read to a portion of the line. When lines are moved in to the cache, only sub-line increments are loaded at a time. Thus, when a line is being moved in from a main store to the cache, the increment that satisfies a pending request for access is transferred first. The access control is overridden to allow access to the increment before the balance of the line is transferred.