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:
Oct. 12, 1999
Filed:
Apr. 25, 1996
Applicant:
Inventors:
Craig G Eisler, Kirkland, WA (US);
G Eric Engstrom, Kirkland, WA (US);
Assignee:
Microsoft Corporation, Redmond, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
709300 ;
Abstract
A system that supports enhancement of device drivers written in distinct code sets, such as a 32-bit enhancement to a 16-bit existing driver is disclosed. The system defines a mechanism for the two device driver components to share information about their functioning, and for a device interface component to use that information so as to route calls to the device drivers based on their functional capabilities. The system can be implemented in a display device interface to support interaction between applications and video hardware components, which include enhanced device drivers.