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. 06, 1993
Filed:
Jun. 17, 1992
Applicant:
Inventor:
Toshiharu Ohshima, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395725 ; 364D / ; 3642864 ; 364285 ; 3642466 ; 364247 ; 3642412 ; 395425 ; 395375 ;
Abstract
A microprocessor provides a CPU to execute a program and a register to store a program status word indicative of a status of the program being executed by the CPU. The program status word includes ring information on the program being executed. A store buffer is provided with write data to be written into an external memory and a corresponding address when the CPU executes a write instruction. The store buffer has a specific area in which ring information on the write instruction is stored. A control part reads out the write data and address from the store buffer and writes the same into the external memory independent of execution of the program by the CPU.