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:
Nov. 08, 1994
Filed:
Jun. 10, 1991
Hitachi, Ltd., Tokyo, JP;
Abstract
The computer system provides a processing unit and normal-use and stand-by main storage units, pre-loads an application program and a control program required for executing the application program in both of the main storage units, in a normal operating time, functions the normal-use main storage unit only as the main storage under the control of the processing unit, executes the control program and the application program stored in the normal-use main storage unit, in a software-fault occurring time, functions the stand-by main storage unit only as the main storage unit under the control of the processing unit, and executes the control program and the application program stored in the stand-by main storage unit. Then, a recovery program contained in the application program stored in the stand-by main storage unit serves to recover the state of the application program into the state before fault occurs. Next, the application program is kept being executed or re-started from the head of the application program.