Program call method and call instruction execution apparatus
Patent 4454580 Issued on June 12, 1984. Estimated Expiration Date: 
September 16, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 16, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesData processing system featuring subroutine linkage operations using hardware controlled stacks System of controlling procedure execution using process control blocks System for excuting a program-call instruction in a computer Calling instructions for a data processing system Patent #: 4338663 InventorsApplicationNo. 06/302932 filed on 09/16/1981US Classes:712/242To macro-instruction routineExaminersPrimary: Zache, Raulfe B.Attorney, Agent or FirmInternational ClassesG06F 9/50 (20060101)G06F 12/02 (20060101) G06F 9/46 (20060101) AbstractA computer architecture is disclosed which permits intersegment program calls with associated selective allocation of data segments of varying lengths. The calling program controls selective allocation of segments to the called program but the called program controls the lengths of the segments being allocated. In this way, recursive calls to the same program cannot affect the function or data of other programs or of the same program in a previous call. Also allocation of data segments can be postponed until execution resulting in more flexible execution of programs written without knowledge of the details of other co-executing programs.Other References
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