Patents by Inventor James S. Flannigan

James S. Flannigan 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).

  • Software emulation of bank-switched memory using a virtual DOS monitor and paged memory management
    Patent number: 4926322
    Abstract: A virtual DOS monitor uses the paging hardware of a processor such as the Intel 80386 microprocessor in conjunction with its Virtual-8086 mode of operation to emulate expanded memory using extended memory. Support for application programs which access expanded memory is thereby provided without the need for additional memory boards or other hardware.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: May 15, 1990
    Assignee: Compag Computer Corporation
    Inventors: Gary A. Stimac, William C. Crosswy, Stephen B. Preston, James S. Flannigan