Patents by Inventor Yoshikatsu Seta

Yoshikatsu Seta 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).

  • Channel address control system for a virtual machine system
    Patent number: 4459661
    Abstract: A virtual machine system having a virtual storage function, wherein registers are provided for holding the heading and trailing addresses of the continuous area in the main storage area assigned respectively for each of the plural operating systems. When the main storage area is accessed by a channel or sub-channel, one of the registers is selected, and the heading address of the register selected is added to the main storage address sent from the channel or sub-channel. The added main storage address is compared with the trailing address in the selected register and if the former is smaller than the latter, the overhead for supporting the virtual storage area is reduced by accessing the main storage area in accordance with the added main storage address mentioned above.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: July 10, 1984
    Assignee: Fujitsu Limited
    Inventors: Saburo Kaneda, Masamichi Ishibashi, Yoshikatsu Seta, Fujio Ikegami