Patents by Inventor Andris Padegs

Andris Padegs 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).

  • Means for coordinating asynchronous main store accesses in a multiprocessing system using virtual storage
    Patent number: 3947823
    Abstract: A unique control circuit that maintains the addressability to an invalidated page frame until execution is completed for all current instructions in all CPUs of a multiprocessing system which uses demand-paging and virtual addressing.A support method is also disclosed which provides an asynchronous sequence of operations for each CPU in the multiprocessing system to maintain the page in the invalidated page frame available to all CPUs and until their current instruction execution is completed. The last CPU to complete its execution moves the page, if modified, out of the page frame.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: March 30, 1976
    Assignee: International Business Machines Corp.
    Inventors: Andris Padegs, Ronald Morton Smith