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. 01, 1987
Filed:
Mar. 02, 1984
Michael Danilenko, West St. Paul, MN (US);
John T Rusterholz, Roseville, MN (US);
Archie E Lahti, Fridley, MN (US);
Unisys Corporation, New York, NY (US);
Abstract
A method and a means of increasing the performance of an instruction buffer in a digital data processing system is disclosed. The improvement is accomplished by by-passing the content addressable memory operation which has heretofore been utilized to access page addresses in the instruction buffer. As each word included on the same page was accessed, the CAM was repetitiously activated even though it was accessing the same page. In the present system, word accesses made to the same page are handled in a much improved manner. In the present system, a comparator is implemented in the system which compares the presently reference page with the previously referenced word, so that when a match is noted, i.e., the same page is indicated, the CAM is bypassed and successive requests made to the same page are satisfied from the instruction buffer by a validity designator which designates that the presently referenced word is the correct one.