Patents by Inventor Mashahiro Murakami

Mashahiro Murakami 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).

  • System for suspending current bus cycle of microprocessor upon receiving external bus retry signal for executing other process and re-staring the suspended bus cycle thereafter
    Patent number: 6735713
    Abstract: The present invention is directed to a microprocessor (MPU) 10 comprising a bridge chip 12 including a bus retry output part (40) for outputting a bus retry (BRTY) signal; a bus retry detection part (30) for determining whether a bus retry signal is input from the bridge chip 12; and a bus cycle controller (38) for suspending a currently executed bus cycle in response to detection of the bus retry signal and for re-starting the suspended bus cycle. The bridge chip also preferably includes an interrupt detection part (32) for determining whether another process request is issued during suspension of the bus cycle; and an interrupt controller (38) for executing that other process before re-starting the suspended bus cycle.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: May 11, 2004
    Assignee: International Business Machines Corporation
    Inventors: Norio Fujita, Mashahiro Murakami, Yoshifumi Sakamoto