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:
Aug. 10, 1993
Filed:
Jun. 04, 1990
Applicant:
Inventors:
Toshihisa Taniguchi, Hadano, JP;
Tsutomu Sumimoto, Hadano, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395425 ; 364D / ; 36424341 ; 36493146 ;
Abstract
When an IOP is transferring data at the maximal throughput because of the fact that the input-output processor (IOP) has issued a next request under a state when the request buffers are full of requests from the IOP at least a part of the requests from the instruction processor (IP) is inhibited. Inhibition of the requests from the IP is released when the pitch of the requests from the IOP reaches a predetermined period or more. When the IOP is transferring data at the maximal throughput in a system having a cache memory, access to the main memory by the IP is inhibited in case requested data does not exist in the cache memory.