Patents by Inventor Shuichi Mukohyama

Shuichi Mukohyama 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 switching address generation modes in CPU having plural address generation modes
    Patent number: 5404471
    Abstract: A data processing system has a microprocessor that is operable in real and protected address generation modes. Transition from the real mode to the protected mode is done by initializing system tables and pointer registers, switching from the real mode to the protected mode, and flushing a prefetch queue before executing further instructions in the protected mode. The transition also includes flushing instructions from the prefetch queue, immediately after the initializing, and executing at least one instruction while prefetching additional instructions that are executed to complete the transition.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: April 4, 1995
    Assignee: International Business Machines Corp.
    Inventors: Seiichi Kawano, Hirohide Komiyama, Shuichi Mukohyama