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:
Jun. 08, 1993
Filed:
Oct. 18, 1991
Yoshitaka Eguchi, Fukuoka, JP;
Junichi Yoshimura, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
In a current-spare switching control system provided for a data processing system having a current data processor, a spare data processor, a fault supervisor for supervising the fault of these processors, and switching units for switching from the current data processor to the spare data processor or vice versa, the current-spare switching control system includes: a storage unit for temporarily storing data bits from the fault supervisor; a discrimination unit operatively connected to the storage unit and for comparing the data bits with a reference signal and outputting a coincidence signal when the data bits coincides with the reference signal; an AND gate operatively connected to the discrimination unit for inputting the coincidence signal and a write command from the fault supervisor, and outputting a write signal when the coincidence signal coincides with the write command; a register unit operatively connected to the AND gate for inputting a data bit from the fault supervisor and outputting a switching signal to switch from the current data processor to the spare data processor or vice versa.