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. 08, 1995
Filed:
Jul. 01, 1993
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395308 ; 3642384 ; 364240 ; 3642402 ; 3642405 ; 364239 ; 3642443 ; 364D / ; 395445 ;
Abstract
An internal address bus, which is connected between a bus control unit and a memory control unit, is formed by a bidirectional bus. The bidirectional internal address bus is connected to an external address transferring bus which is used to transfer a write address in a system bus to the memory control unit. The bidirectional internal address bus is commonly used for renewal and invalidation of first and second buffers for an instruction cache and operand cache. Therefore, in the present invention, the number of the internal bus lines can be reduced, a control constitution can be simplified, and a consistency of contents in a plurality of internal buffers and the main memory can be easily maintained.