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. 11, 1999
Filed:
Oct. 22, 1997
Hajime Takahashi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method of recovering an exclusive control instruction in a computer system having a plurality of processor modules and a plurality of shared memory modules which are coupled via a system bus. At least a part of the shared memory modules forms a dual construction. The exclusive control instruction makes access from an arbitrary one of the processor modules to the shared memory modules. First, a read access is performed to a master shared memory module from the arbitrary processor module in response to the exclusive control instruction. Thereafter, a write access is performed to a slave shared memory module, which forms a pair with the master shared memory module from the arbitrary processor module, so as to rewrite data in the slave shared memory module. Finally, a write access is performed to the master shared memory module from the arbitrary processor module, so as to rewrite data in the master shared memory module.