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:
Apr. 20, 1982
Filed:
Feb. 22, 1979
Hitachi, Ltd., Tokyo, JP;
Abstract
A multiple virtual storage control system for a data processing system for handling a plurality of virtual spaces is disclosed. Virtual addresses indicative of addresses in the virtual spaces are translated to real addresses by a translation table. When a new virtual space is established by setting a first address or segment table origin address (STO address) of the translation table, a virtual space number is assigned to the established virtual space by an STO address stack, which comprises a definite number of registers. The number of virtual space numbers assigned is larger than the number of registers. The virtual addresses and the corresponding real addresses are stored in a high-speed address translator so that the virtual addresses are translated to the real addresses at a high speed. When an overflow of the virtual space number assigned in the STO address stack takes place, the plurality of virtual spaces registered in the high-speed address translator are simultaneously purged.