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:
Sep. 06, 1994
Filed:
Jun. 10, 1991
Clifford O Hayden, Jamaica Plain, MA (US);
David R Snyder, Poughkeepsie, NY (US);
Susan B Stillman, Poughkeepsie, NY (US);
Charles F Webb, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method for modifying program status words (PSW) with overlap enabled. According to the present invention, an instruction which modifies a PSW system mask, access key, or address space code is executed with overlap enabled. This instruction generates a new PSW. The new PSW is pushed into a queue. Once the instruction is complete, the new PSW becomes an architected PSW. If the instruction does not complete, then the new PSW is discarded. Once the new PSW is pushed into the queue, subsequent instructions may execute using the new PSW. Thus, instructions which modify the PSW system mask, access key, and address space code may execute with overlap enabled.