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. 15, 2012
Filed:
Mar. 24, 2010
Takeshi Owaki, Kawasaki, JP;
Takaharu Ishizuka, Kawasaki, JP;
Toshikazu Ueki, Kawasaki, JP;
Makoto Hataida, Kawasaki, JP;
Yuka Hosokawa, Kawasaki, JP;
Atsushi Morosawa, Kawasaki, JP;
Takashi Yamamoto, Kawasaki, JP;
Daisuke Itou, Kawasaki, JP;
Takeshi Owaki, Kawasaki, JP;
Takaharu Ishizuka, Kawasaki, JP;
Toshikazu Ueki, Kawasaki, JP;
Makoto Hataida, Kawasaki, JP;
Yuka Hosokawa, Kawasaki, JP;
Atsushi Morosawa, Kawasaki, JP;
Takashi Yamamoto, Kawasaki, JP;
Daisuke Itou, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A northbridge, when detecting a synchronization break of a redundant CPU, stops the operation of an abnormal CPU bus where an error has occurred and the firmware in a firmware hub instructs the northbridge to inhibit an external instruction. In addition, the firmware saves the inside information of a normal CPU connected to a normal CPU bus and cache data on a memory and the northbridge issues reset to all CPUs in the home system board. The firmware then restores the inside information of the CPU saved on the memory to all CPUs and instructs the northbridge to cancel the inhibition of the external instruction.