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:
May. 31, 1994
Filed:
Aug. 20, 1992
Applicant:
Inventors:
David N Cutler, Bellevue, WA (US);
David A Orbits, Redmond, WA (US);
Dileep Bhandarkar, Shrewsbury, MA (US);
Wayne Cardoza, Merrimack, NH (US);
Richard T Witek, Littleton, MA (US);
Assignee:
Digital Equipment Corp., Maynard, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395425 ; 364D / ;
Abstract
In a data processing system, apparatus and method for controlling the type of processing to which data signal groups can be subjected includes a page table entry format having a multiplicity of field positions for storing signals defining page access rights. In addition to the read/write access control, the signal group access rights can be determined by the current mode of operation of the data processing unit and the intended activity of the addressed instruction or data element (i.e., read, write or execute).