Patents by Inventor Rakesh K. Agarwal

Rakesh K. Agarwal 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).

  • I/O control system having a plurality of access enabling bits for controlling access to selective parts of an I/O device
    Patent number: 5257353
    Abstract: In an I/O port protection device, is described wherein accessing an I/O device is selectively controlled by a value of a bit stored in a bit map. A CPU instruction accessing a port is allowed direct access when the bit value for that port is a zero, but is trapped when the value is a one. A trapped instruction is either prohibited from any accessing or is rerouted for accessing a different I/O port.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: October 26, 1993
    Assignee: Intel Corporation
    Inventors: Greg J. Blanck, Rakesh K. Agarwal
  • I/O Control system having a plurality of access enabling bits for controlling access to selective ports of an I/O device
    Patent number: 5146565
    Abstract: In an I/O port protection device, accessing an I/O device is selectively controlled by a value of a bit stored in a bit map. A CPU instruction accessing a port is allowed direct acceess when the bit value for that port is a zero, but is trapped when the value is a one. A trapped instruction is either prohibited from any accessing or is rerouted for accessing a different I/O port.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: September 8, 1992
    Assignee: Intel Corporation
    Inventors: Greg J. Blanck, Rakesh K. Agarwal