Christopher J Duguay

US Patent:

6681244, Jan 20, 2004

Filed:

Jun 9, 2000

Appl. No.:

09/591579

Inventors:

Patricia C. Cross - Westborough MA
Glenn W. Connery - Petaluma CA
Christopher J. Duguay - Winchendon MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F 1516

US Classification:

709203

Abstract:

A system for operating a network interface adapter when an associated network computing system is in a low-power state. The system includes a host executing an operating system (OS) and having a host OS absent state while operating in the low-power state and a host OS present state while operating in a full-power state. When a message is received at the network interface adapter, the network adapter determines whether the host is in the OS present state or the OS absent state. The network adapter forwards the message to the host if it is in the OS present state, and determines the message type if the host is in the OS absent state. The network adapter may generate and transmit a response to the message based on the message type without unnecessarily transitioning the host to the OS present state.

US Patent:

6694360, Feb 17, 2004

Filed:

Jun 9, 2000

Appl. No.:

09/591568

Inventors:

Christopher J. Duguay - Winchendon MA
Heidi R. Pickreign - Harvard MA
Patricia C. Cross - Westborough MA
Laxminarayan Krishnamurthy - Acton MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F 15177

US Classification:

709220, 709317

Abstract:

A multi-mode network interface adapter includes a diagnostic mode, a sleep mode and a run-time mode. The network adapter enters the diagnostic mode at least in response to a power-up signal and validates the operation of predetermined network adapter functions. In the sleep mode, the network adapter transmits messages onto the network and responds to messages received from the network that would otherwise be handled by a host computer operating system. In this mode, the network adapter creates the appearance to other devices that the host computer is operational even if the host computer has entered a reduced power state in which the host computer operating system is not operational. In the run-time mode, the network adapter passes messages received from the network to the host computer and transmits messages received from the host computer over the network.

US Patent:

6874047, Mar 29, 2005

Filed:

Jun 9, 2000

Appl. No.:

09/591044

Inventors:

Christopher J. Duguay - Winchendon MA, US
Robert Reissfelder - Westwood MA, US
Robert F. Turnbull - Watertown MA, US
Michael K. Brown - Salem NH, US

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F013/00

US Classification:

710100, 713600

Abstract:

A system and method for implementing an SMBus/IC interface in a computer connectable to a network. The system includes a plurality of devices communicably coupled to an SMBus. The system operates at a first clock rate when the system is awake, and at a second clock rate less than the first clock rate when the system is sleeping. At least when the system is sleeping, a first device stores data transferred via the SMBus in a register, and a second device drives the clock line of the SMBus to a low logic level while the data is stored in the register of the first device. Upon completion of the data transfer operation, the first device clears the data from the register, and the second device releases the clock line to allow it to be pulled-up by pull-up circuitry connected to the SMBus.

US Patent:

6539338, Mar 25, 2003

Filed:

Jun 9, 2000

Appl. No.:

09/591045

Inventors:

Heidi R. Pickreign - Harvard MA
Laxminarayan Krishnamurthy - Acton MA
Christopher J. Duguay - Winchendon MA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F 1127

US Classification:

702185, 455115

Abstract:

A method and apparatus for implementing a self-diagnostic capability in a network interface adapter in which failure data is provided to a host processor. The host processor may report the failure data to a user or additionally the host processor may attempt to correct predetermined faults in code images by writing a valid code image to a memory on the network interface adapter.