Gary Nichols

US Patent:

8495301, Jul 23, 2013

Filed:

Nov 3, 2010

Appl. No.:

12/939128

Inventors:

Praveen Alexander - Royersford PA, US
Cheng Yi - Vancouver CA, US
Tao Zhong - Coquitlam CA, US
David J. Clinton - Coopersburg PA, US
Gary Nichols - Auburn CA, US

Assignee:

PMC-Sierra US, Inc. - Santa Clara CA

International Classification:

G06F 13/00

US Classification:

711118, 711154, 710 22, 710 23, 710 26

Abstract:

A scatter gather cache system and method are provided, which increase performance of scatter-gather DMA operations by reducing the time taken by the DMA engine to perform a logical to physical address translation. This is done primarily by two-dimensional caching of scatter-gather elements of selected scatter-gather lists using a novel indexing, line swapping and replacement methodology. The cache can also include a context victim table (CVT) for storing scatter-gather list contexts from evicted cache entries and also allows for pre-fetching of SGL elements from Scatter-Gather Lists (SGL). It also provides coherency support when there are multiple instances of the cache accessing the same memory space.

US Patent:

48870110, Dec 12, 1989

Filed:

Feb 23, 1989

Appl. No.:

7/314601

Inventors:

Carl R. Haynie - Carmichael CA
Kirk P. Gipson - Roseville CA
Gary H. Nichols - Auburn CA

International Classification:

H01J 2970
H01J 2976

US Classification:

315403

Abstract:

A signal generator which generates an amplified yoke signal for application to a vertical yoke of a cathode ray tube monitor is presented. The signal generator includes a linear ramp generator and a correction generator. The linear ramp generator has an output on which is placed a ramp signal. The linear ramp generator also has a first input which receives a clock signal. The frequency of oscillation of the clock signal determines the frequency of oscillation of the ramp signal. The linear ramp generator additionally has a second input for receiving a height adjustment signal. The linear ramp generator varies the maximum voltage range of the ramp signal responsive to the height adjustment signal. The maximum voltage range is varied independent of the frequency of oscillation of the ramp signal. The correction generator receives the ramp signal from the linear ramp generator and generates an "S" correction signal.