Patents by Inventor Dhruvkumar M. Desai

Dhruvkumar M. Desai 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).

  • Data processing system including corrupt flash ROM recovery
    Patent number: 5327531
    Abstract: A personal computer is provided with primary and secondary non-volatile storage devices for initializing the system when power is turned on. The primary device is a flash RAM. A flash ROM memory controller include means to detect when the flash ROM becomes corrupted and to switch over to the secondary device for initialization allowing the flash ROM to be later reprogrammed.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: July 5, 1994
    Assignee: International Business Machines Corp.
    Inventors: Richard Bealkowski, Dhruvkumar M. Desai, Robert B. Haig, Dennis L. Moeller, Essy Tashakori
  • Command delivery for a computing system for transferring data between a host and subsystems with busy and reset indication
    Patent number: 5170471
    Abstract: A Command interface includes ports for transferring information between a host processor and at least one intelligent subsystem which may have attached devices. A Command Interface port receives either a direct command or an indirect command from the host processor, which commands are indicative of a type of operation to be performed by the one subsystem or an attached device. An Attention port receives a code from the host processor which is indicative of which one of the direct command or the indirect command is received at the Command Interface port, and which is also indicative of which of the one intelligent subsystem or a device is to execute the command. A command busy/status port receives a code from the one intelligent subsystem which is indicative of whether or not the Command Interface port and the Attention port are busy, and whether or not the one intelligent subsystem is accepting or rejecting commands. The host processor can read this port without altering or updating the code.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: December 8, 1992
    Assignee: International Business Machines Corporation
    Inventors: Francis M. Bonevento, Douglas R. Chrisholm, Sammy D. Dodds, Dhruvkumar M. Desai, Ernest N. Mandese, Andrew B. McNeill, Richard N. Mendelson
  • Command delivery for a computing system for transfers between a host and subsystem including providing direct commands or indirect commands indicating the address of the subsystem control block
    Patent number: 5131082
    Abstract: A command interface includes ports for transferring information between a host processor and at least one intelligent subsystem which may have attached devices. A Command Interface port receives either a direct command or an indirect command from the host processor, which commands are indicative of a type of operation to be performed by the one subsystem or an attached device. An Attention port receives a code from the host processor which is indicative of which one of the direct command or the indirect command is received at the Command Interface port, and which is also indicative of which of the one intelligent subsystem or a device is to execute the command. A command busy/status port receives a code from the one intelligent subsystem which is indicative of whether or not the Command Interface port and the Attention port are busy, and whether or not the one intelligent subsystem is accepting or rejecting commands. The host processor can read this port without altering or updating the code.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: July 14, 1992
    Assignee: International Business Machines Corporation
    Inventors: Francis M. Bonevento, Douglas R. Chisholm, Sammy D. Dodds, Dhruvkumar M. Desai, Ernest N. Mandese, Andrew B. McNeill, Richard N. Mendelson