Stephen L Chan

US Patent:

6574682, Jun 3, 2003

Filed:

Nov 23, 1999

Appl. No.:

09/448359

Inventors:

Stephen H. Chan - Los Altos Hills CA

Assignee:

ZiLOG, Inc. - San Jose CA

International Classification:

G06F 1300

US Classification:

710 22, 710 35, 710 52, 711113, 711118

Abstract:

The present invention provides for data flow enhancement in processor architectures having one or more caches by allowing DMA-type transfers to and from these caches. Specific examples allow such direct transfers between a peripheral logic device and the cache memory, or between either the main memory or a special memory and the cache memory. This is done by the processor reserving a portion of cache for the direct transfer, which is then carried out by a DMA-type controller. While this transfer is occurring, the processor is able to carry out other tasks and access the unreserved portion of cache in the normal manner. In the preferred embodiment, the transfer is performed by a cycle stealing technique. Once the transfer is complete, the reserved portion of the cache may be accessed by the processor. The size of the reservable portion may either be fixed or dynamically determined by the operating system based on factors such as task flow management and data transfer rates.

US Patent:

6933108, Aug 23, 2005

Filed:

Dec 8, 2000

Appl. No.:

09/733395

Inventors:

Mark A. Goldsmith - San Francisco CA, US
Stephen Chan - San Francisco CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

C12Q001/70
C12Q001/68
C12P021/00
C12P019/34

US Classification:

435 5, 435 6, 435 691, 4353201, 435 721, 435 912, 4352351, 536 231, 536 234, 530300, 530350

Abstract:

Methods and compositions are provided for at least slowing the progression of a filovirus mediated disease condition in a host. In the subject methods, an effective amount of an agent that at least reduces the amount of folate receptor mediated filovirus cell entry is administered to the host. The subject methods find use in both the prevention and treatment of filovirus associated disease conditions, including Marburg and Ebola-Zaire virus mediated disease conditions.

US Patent:

7509478, Mar 24, 2009

Filed:

Sep 10, 2007

Appl. No.:

11/900100

Inventors:

Stephen H. Chan - Los Altos Hills CA, US

Assignee:

ZiLOG, Inc. - San Jose CA

International Classification:

G06F 12/12

US Classification:

711219

Abstract:

A system efficiently expands program memory without extensively modifying the remaining microcontroller architecture. An address bus of N+M bits addresses 2memory locations in a regular portion of program memory and additional memory locations in an expanded portion. An N-bit program counter increments through instructions stored only in the regular portion. Constants are stored in both the regular and expanded portions. An M-bit page-designator is prepended to an N-bit operand to generate a memory address of N+M bits. Program memory is expanded only when a load instruction retrieves constants from program memory. The page-designator is toggled when an N-bit operand rolls over upon incrementing by the load instruction. A block of constants straddling the boundary between the regular and expanded portions can be retrieved from program memory by executing only the load instruction. When program instructions are executed that do not retrieve constants, a fixed page-designator designates the regular portion.

US Patent:

7803555, Sep 28, 2010

Filed:

Apr 11, 2005

Appl. No.:

11/104211

Inventors:

Mark A. Goldsmith - San Francisco CA, US
Stephen Chan - San Francisco CA, US

Assignee:

The J. David Gladstone Institutes - San Francisco CA

International Classification:

G01N 33/00
G01N 33/50
G01N 33/53

US Classification:

435 71, 435 72, 435 721

Abstract:

Methods and compositions are provided for at least slowing the progression of a filovirus mediated disease condition in a host. In the subject methods, an effective amount of an agent that at least reduces the amount of folate receptor mediated filovirus cell entry is administered to the host. The subject methods find use in both the prevention and treatment of filovirus associated disease conditions, including Marburg and Ebola-Zaire virus mediated disease conditions.

US Patent:

7853773, Dec 14, 2010

Filed:

Mar 24, 2009

Appl. No.:

12/383593

Inventors:

Stephen H. Chan - Los Altos Hills CA, US

Assignee:

Maxim Integrated Products, Inc. - Sunnyvale CA

International Classification:

G06F 12/00

US Classification:

711219, 711E1207

Abstract:

A system efficiently expands program memory without extensively modifying the remaining microcontroller architecture. An address bus of N+M bits addresses 2memory locations in a regular portion of program memory and additional memory locations in an expanded portion. An N-bit program counter increments through instructions stored only in the regular portion. Constants are stored in both the regular and expanded portions. An M-bit page-designator is prepended to an N-bit operand to generate a memory address of N+M bits. Program memory is expanded only when a load instruction retrieves constants from program memory. The page-designator is toggled when an N-bit operand rolls over upon incrementing by the load instruction. A block of constants straddling the boundary between the regular and expanded portions can be retrieved from program memory by executing only the load instruction. When program instructions are executed that do not retrieve constants, a fixed page-designator designates the regular portion.

US Patent:

8387073, Feb 26, 2013

Filed:

Apr 30, 2007

Appl. No.:

11/742282

Inventors:

Charles Micalizzi - Capistrano Beach CA, US
Stephen J. Chan - Roseville CA, US

Assignee:

QLOGIC, Corporation - Aliso Viejo CA

International Classification:

G06F 9/44
G06F 15/16

US Classification:

719326, 709227

Abstract:

Method and system for transferring information from a host system is provided. The method includes sending a SCSI read command and a scatter/gather (“S/G”) list from an application executed by a processor for the host system to a iSCSI software layer executed by the processor for the host system; generating an iSCSI protocol data unit (“PDU”) header for a iSCSI PDU for the SCSI read command; sending the iSCSI PDU to a data mover layer executed by the processor for the host system; and sending the iSCSI PDU to an iSCSI offload module in a network adapter operationally coupled to the host system; wherein the iSCSI offload module appends a PDU header digest to the iSCSI PDU header; and transmits the PDU to a PDU destination.

US Patent:

7269710, Sep 11, 2007

Filed:

Jul 23, 2004

Appl. No.:

10/898704

Inventors:

Stephen H. Chan - Los Altos Hills CA, US

Assignee:

ZiLOG, Inc. - San Jose CA

International Classification:

G06F 9/26

US Classification:

711219, 711203, 711206, 711208, 711209, 711220

Abstract:

A system efficiently expands program memory without extensively modifying the remaining microcontroller architecture. An address bus of N+M bits addresses 2memory locations in a regular portion of program memory and additional memory locations in an expanded portion. An N-bit program counter increments through instructions stored only in the regular portion. Constants are stored in both the regular and expanded portions. An M-bit page-designator is prepended to an N-bit operand to generate a memory address of N+M bits. Program memory is expanded only when a load instruction retrieves constants from program memory. The page-designator is toggled when an N-bit operand rolls over upon incrementing by the load instruction. A block of constants straddling the boundary between the regular and expanded portions can be retrieved from program memory by executing only the load instruction. When program instructions are executed that do not retrieve constants, a fixed page-designator designates the regular portion.

US Patent:

20130318098, Nov 28, 2013

Filed:

May 24, 2012

Appl. No.:

13/480217

Inventors:

Stephen Chan - Los Altos Hills CA, US
Edbert Chan - Los Altos Hills CA, US

International Classification:

G06F 17/30

US Classification:

707748, 707E17039

Abstract:

Website and newsletter operators may only have users' email addresses but not their person names. It can be beneficial for such operators to derive additional information about the email address owners so they can improve their services. However, there is no easy way to retrieve owners' information based on only email addresses. The present disclosure provides information such as the owners' names, professional profiles and aggregated statistics with only a list of email addresses as the input.