Patents by Inventor Hugh W. McDevitt

Hugh W. McDevitt 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).

  • Patent number: 7562265
    Abstract: A method, apparatus and program storage device for providing self-quiesced logic for handling an error recovery instruction such as a reset or self-test instruction. For example, during a reset or self test procedure, the logic is isolated without adversely affecting the local processor. Self-quiesced logic processes an error recovery instruction by monitoring the processor interface for an idle condition and withholding access to the local processor. Once the local processor interface has been quiesced and the internal logic paths are idle, the logic will proceed with the reset or self-test.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: July 14, 2009
    Assignee: International Business Machines Corporation
    Inventors: Michael J. Azevedo, Hugh W. McDevitt, Carol Spanel, Andrew D. Walls
  • Publication number: 20080239942
    Abstract: Systems and methods for verifying recovery from intermittent hardware faults. Exemplary embodiments include a method for verifying recovery from intermittent hardware faults, the method including generating an error in a computer interface by forcing a hardware fault after setting an error injection enable control bit in a register coupled to the computer interface, detecting an error in a hardware checker coupled to the computer interface which asserts an error interrupt signal resetting the error injection enable control bit when the error interrupt signal and a hardware reset control bit coupled to the computer interface are both active, disabling error forcing when the error injection enable control bit is reset, and executing an error recovery and logging procedure in the computer interface.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Joe S. Hsu, Mark C. Johnson, Hugh W. McDevitt
  • Patent number: 7171576
    Abstract: A method, apparatus, and program storage device for providing clocks to multiple frequency domains using a single input clock of variable frequency. Independent clock signals are generated at predetermined clock frequency targets in response to control signals that are based on a determined bus clock frequency.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: January 30, 2007
    Assignee: International Business Machines Corporation
    Inventors: Hugh W. McDevitt, Carol Spanel, Andrew D. Walls
  • Publication number: 20040205370
    Abstract: A method, apparatus and program storage device for providing clocks to multiple frequency domains using a single input clock of variable frequency. Independent clock signals are generated at predetermined clock frequency targets in response to control signals that are based on a determined bus clock frequency.
    Type: Application
    Filed: April 9, 2003
    Publication date: October 14, 2004
    Applicant: International Business Machines Corporation
    Inventors: Hugh W. McDevitt, Carol Spanel, Andrew D. Walls