Patents by Inventor Mark A. Vasquez

Mark A. Vasquez 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).

  • Instruction processor control system using separate hardware and microcode control signals to control the pipelined execution of multiple classes of machine instructions
    Patent number: 5577259
    Abstract: A digital instruction processor control system for an instruction processor having a multiple stage instruction execution pipeline capable of executing binary instructions in fixed predetermined stages. The control system includes a hardware controller to generate control signals for execution of all pipeline stages of standard instructions and for the first stage of extended cycle instructions and provides a main microcode controller to provide programmed control signals for controlling all subsequent stages of execution of extended cycle instructions. The control system also utilizes a separate sequence microcode controller for execution of certain instructions of a predetermined type including decimal instruction execution, during which time the main microcode controller is under control of the separate sequence controller.
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: November 19, 1996
    Assignee: Unisys Corporation
    Inventors: Merwin H. Alferness, John S. Kuslak, Mark A. Vasquez, Joseph P. Kerzman, Eric S. Collins