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:
Aug. 16, 1977
Filed:
Apr. 30, 1976
Donall Garraid Bourke, Boca Raton, FL (US);
Frederic John Puttlitz, Boca Raton, FL (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Extending the size of the main memory of a data processing system having a synchronous inner storage unit by attaching a relocation translator having special connection interfaces and translated addressing for attaching a synchronous outer storage unit and an asynchronous storage unit which may be remotely located from the processor. A differnt form of storage cycle is generated by the translator for interfacing each of the three storage units being accessed. The translator performs address translation which expands the number of bits in the physical address to support the extended main memory. The extended address uses a concatenation of a program-derived address and a machine-derived address key. The maximum extendable size of the memory can substantially exceed the maximum addressing capability of any program, which is determined by the relocatable addressability obtained through any stack of segmentation registers. The maximum extendable size of the main memory is determined by the number of bit positions in the physical block address field in a segmentation register (for addressing a physical block in any of the storage units) concatenated with the number of bit positions needed to address a location in any selected storage block.