Title: Data processing system featuring subroutine linkage operations using hardware controlled stacks

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.

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Inventors: Davis, Michael Ian (Boca Raton, FL, US)
Mayes, Gary Wayne (Boca Raton, FL, US)
McDermott, Thomas Stephen (Boca Raton, FL, US)
Wise, Larry Edward (Boca Raton, FL, US)

Application Number: 682002
Filing Date: 1976-04-30
Publication_date: 1977-08-09
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Class(es): 712/228 712/242
Other Classes:
US Patent Ref:

3548384	Dec, 1970	Barton et al.	340/172.
3639912	Jan, 1972	Campbell	340/172.
3771146	Nov, 1973	Cotton et al.	340/172.
3868644	Feb, 1975	Healey et al.	340/172.
3909797	Sep, 1975	Gross et al.	340/172.

Other Refs:
Primary Examiner: Springborn, Harvey E.
Assistant Examiner:
Attorney: Copper; D. Kendall