Heidi R. Pickreign - Harvard MA Laxminarayan Krishnamurthy - Acton MA Robert Reissfelder - Westwood MA
Assignee:
3Com Corporation - Santa Clara CA
International Classification:
G06F 1206
US Classification:
711202, 711170, 713 2
Abstract:
The present application is directed to a method and system for mapping a host computer address space into a network interface adapter (NIA) address space. A network interface processor contained within the NIA requests a memory allocation from the host computer. The host computer responds with an assigned base address in the host computer address space and a length defining the contiguous addresses within the host computer address space equal to the allocation requested by the NIA processor. A hardware trap is set, such that, an interrupt to the NIA processor is generated when the host computer attempts to access data at an address within the allocated address range of host computer contiguous addresses. The network interface processor translates the received host address to a physical address within the NIA address space, reads the data at the respective NIA physical address and transfers the data to the host computer.
Host Computer Virtual Memory Within A Network Interface Adapter
Heidi R. Pickreign - Harvard MA, US Laxminarayan Krishnamurthy - Acton MA, US Robert Reissfelder - Westwood MA, US
Assignee:
3Com Corporation - Santa Clara CA
International Classification:
G06F 1314
US Classification:
709245, 711202, 710 52, 709212
Abstract:
A system and method of mapping a host computer address space into a network interface adapter (NIA) address space. A network interface processor within the NIA requests a memory allocation from the host computer. The host computer responds with an assigned base address in the host computer address space, and a length defining the contiguous addresses within the host computer address space equal to the allocation requested by the NIA processor. A hardware trap is set such that an interrupt to the NIA processor is generated when the host computer attempts to access data at an address within the allocated address range of host computer contiguous addresses. The network interface processor translates the received host address to a physical address within the NIA address space, reads the data at the respective NIA physical address, and transfers the data to the host computer.
System And Method For Implementing An Smbus/I2C Interface On A Network Interface Card
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.
Name / Title
Company / Classification
Phones & Addresses
Robert Reissfelder Manager
VBO REALTY LLC
4161 Washington St, Roslindale, MA 02131 52 Grayfield Rd, West Roxbury, MA 02132
Robert Reissfelder President
B & A CONTRACTING, INC Trade Contractor
52 Grayfield Ave, West Roxbury, MA 02132 West Roxbury, MA 02132