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:
Dec. 18, 1990
Filed:
Jun. 08, 1990
Richard I Baum, Poughkeepsie, NY (US);
Terry L Borden, Poughkeepsie, NY (US);
Justin R Butwell, Milton, NY (US);
Carl E Clark, Poughkeepsie, NY (US);
Alan G Ganek, Chappaqua, NY (US);
James Lum, Redwood City, CA (US);
Michael G Mall, Lagrangeville, NY (US);
Kenneth E Plambeck, Poughkeepsie, NY (US);
Casper A Scalzi, Poughkeepsie, NY (US);
Richard J Schmalz, Wappingers Falls, NY (US);
Ronald M Smith, Wappingers Falls, NY (US);
Julian Thomas, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus is provided to translate the contents of access registers into information for use in performing addressing functions for multiple virtual address spaces. The access registers represent the full addressing capability of the system but do not directly contain the addressing information. The system has a plurality of general purpose registers, a plurality of access registers associated with the general registers, an access list having access list entries which is addressed by the contents of the access register, memory storage for holding address space number second table entries (ASTE), where the contents of the access list entry locate the ASTE and where the ASTE contains the addressing information needed to translate a virtual address when combined with the contents of a general purpose register. Access register translation (ART) consists of the process of determining addressing information by using the access list entry and the ASTE. The results of the ART process are stored in an ART lookaside buffer (ALB) which stores the results of ART while valid for later use.