Patents by Inventor Joseph M. McGraw

Joseph M. McGraw 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).

  • Method and apparatus for determining microprocessor kernal faults
    Patent number: 4993027
    Abstract: Method and apparatus for testing the address/data paths between the ROM and CPU of a computer where the computer includes a first connector adapted to connect the ROM to the address/data paths so that data can be transferred between the CPU and the ROM via the data paths of the address/data paths and a second connector adapted to connect the CPU to the address/data paths so that addresses can be applied to an address decoder for the ROM via the address lines of the address/data paths. A memory is connected to the address decoder and the data lines via the first connector, the memory storing predetermined data at a plurality of memory locations. A kernel debugging module connected to the address/data paths via the second connector includes circuitry for successively applying read signals which emulate those provided by the CPU to successively read the predetermined data stored at the memory locations.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: February 12, 1991
    Assignee: Pace, Incorporated
    Inventors: Joseph M. McGraw, David E. Campbell