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:
Dec. 01, 1998
Filed:
Oct. 15, 1996
Motohisa Ito, Machida, JP;
Eiki Kamada, Hadano, JP;
Toshiko Isobe, Hadano, JP;
Kei Yamamoto, Zama, JP;
Katsutoshi Uehara, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Information Technology Co, Ltd., Hadano, JP;
Abstract
A store buffer apparatus connected to a CPU and a main storage unit includes a first buffer for holding a pair of store address and store data in the main storage unit supplied from an operation execution unit of the CPU, a first latch connected to the first buffer means for holding the store address, a second latch connected to the first latch for holding an output of the first latch, a judgment device for comparing an output read out from the address array with an output of the second latch to thereby judge whether the cache hit check for the store address is successful or not and a second buffer for holding the pair of store data and store address having successful cache hit check judged by the judgment device. Occurrence of the state that the store buffer is full is reduced. Two data stored in the second buffer can possess a format into which the two data can be merged.