Patents by Inventor Myron H. MacDougall

Myron H. MacDougall 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).

  • Interprocessor communications includes second CPU designating memory locations assigned to first CPU and writing their addresses into registers
    Patent number: 5123094
    Abstract: A method for performing inter-processor communications in a multiprocessor system combines the sending of a message with the sending of a message interrupt. Messages are exchanged through a shared memory organized into pages, each of which may be "owned" by a processor. When a sending processor executes a store instruction that stores its operand to a memory area owned by a destination processor, a message interrupt is presented to the destination processor. If the destination processor is interrupt enabled, the operand of the store instruction is stored at the address specified by the store instruction and that address is stored in a register of the destination processor. Execution of the store instruction by the sending processor then completes.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: June 16, 1992
    Assignee: Apple Computer, Inc.
    Inventor: Myron H. MacDougall