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:
Jan. 05, 2010
Filed:
May. 21, 2004
Gilman K. Wong, Redmond, WA (US);
Lingyun Wang, Redmond, WA (US);
Hock S. Lee, Redmond, WA (US);
Kirk O. Olynyk, Redmond, WA (US);
David Liping Xu, Redmond, WA (US);
James Andrew Alan Goossen, Redmond, WA (US);
Gilman K. Wong, Redmond, WA (US);
Lingyun Wang, Redmond, WA (US);
Hock S. Lee, Redmond, WA (US);
Kirk O. Olynyk, Redmond, WA (US);
David Liping Xu, Redmond, WA (US);
James Andrew Alan Goossen, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A user mode device driver interface (UMDDI) is disclosed. The UMDDI is preferably implemented in Windows® NT® version 5.0 and similar systems. The UMDDI allows a device driver to execute in user-mode while the graphics engine (GRE) remains in kernel-mode. The UMDDI exists as a layer between the user-mode driver and GRE; from the perspective of GRE, it encapsulates the user-mode driver and makes it appear to be a normal kernel-mode driver. The UMDDI layer handles the kernel-to-user and user-to-kernel transitions, parameter validation, and management of the kernel-mode and user-mode data and objects.