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:
Feb. 16, 1999
Filed:
Feb. 06, 1997
Applicant:
Inventor:
Richard P Draves, Seattle, WA (US);
Assignee:
Microsoft Corporation, Redmond, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
711202 ; 711203 ;
Abstract
A computer system includes physical memory, a virtual memory system, and a protected operating system kernel. The kernel has kernel functions that accept and use virtual memory addresses from user processes. When an invalid virtual memory address is used by a kernel function, the memory address is automatically mapped to a scratch location in physical memory, so that the kernel function accesses the scratch location rather than generating an exception.