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, 1993
Filed:
Sep. 26, 1989
Hitachi, Ltd., Tokyo, JP;
Hitachi Computer Engineering Co., Ltd., Tokyo, JP;
Abstract
An information processing apparatus having at least one processor and a main storage, accessed by the processor, and capable of providing a plurality of logical information processing apparatus by logically partitioning the information processing apparatus. The information processing apparatus includes a main storage partitioned into a plurality of memory areas, each of the memory areas corresponding to one of the plurality of logical information processing apparatus. The information processing apparatus further includes a first storage unit for storing identification information for each of the memory areas identifying the logical information processing apparatus allocated to each memory and a read unit for reading the identification information from the first storage unit when the main storage is to be accessed by one of the plurality of logical information processing apparatus. Each of the plurality of logical information processing apparatus possesses a unique identification information. The information processing apparatus further includes a comparison unit for comparing the identification information read by the read unit with the identification information of the one logical information processing apparatus which accesses the main storage and a unit for determining if the access to the main storage is allowed, in accordance with the comparison result of the comparison unit. Access by the one logical information processing apparatus is canceled if the determining unit determines the access is not allowable.