Cezary Dubnicki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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.
February 2, 1996
Date of Patent:
August 19, 1997
Matthias Augustin Blumrich, Cezary Dubnicki, Edward William Felten, Kai Li