Patents Represented by Attorney D. Kendall Copper

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  • Data processing system featuring subroutine linkage operations using hardware controlled stacks
    Patent number: 4041462
    Abstract: A data processing system is described wherein, during linkage to a subroutine, by a single machine instruction, a complete status save and the assignment of a dynamic work area are effected. By another single machine instruction the process is reversed. The elements of the complete machine status and the dynamic work area are retained in a hardware controlled stack, thus permitting nesting of the subroutine calls.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: August 9, 1977
    Assignee: International Business Machines Corporation
    Inventors: Michael Ian Davis, Gary Wayne Mayes, Thomas Stephen McDermott, Larry Edward Wise