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:
Aug. 19, 1997
Filed:
Feb. 02, 1996
Matthias Augustin Blumrich, Princeton, NJ (US);
Cezary Dubnicki, Princeton, NJ (US);
Edward William Felten, Princeton, NJ (US);
Kai Li, Princeton, NJ (US);
Other;
Abstract
In a computer system the typically high overhead requirement for CPU instructions to operate a conventional direct memory access (DMA) controller are reduced to two user-level memory references via User-level Direct Memory Access (UDMA). The UDMA apparatus is located between the CPU and a DMA Controller, whereby the UDMA is programmed to use existing virtual memory translation hardware of the associated computer system to perform permission checking and address translation without Kernel involvement, and otherwise use minimal Kernel involvement for other operations.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile