Patents by Inventor Kenshiro Ando

Kenshiro Ando 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 operating text mode software in a graphics mode environment
    Patent number: 5404438
    Abstract: A method and apparatus which allows U.S. software applications which write directly to the video text RAM area to run in a purely graphics mode operating system environment such as Japanese mode of DOS/V. Memory management software includes an option which reserves main memory at system initialization for receiving the text RAM area in IBM PC compatible systems. A software driver periodically checks to determine if anything has changed in the text RAM area using the "dirty" bits associated with the page table entries in the 386 paging mechanism. If new data has been written to this area, the driver converts the ASCII data written to this area to graphics based characters which are then displayed onto the computer screen.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: April 4, 1995
    Assignee: Compaq Computer Corporation
    Inventors: John R. Kennedy, Kenshiro Ando