Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Compiler and Runtime Migration Guide


TGT (Task Global Table) and RSA (Register Save Area) conventions

The TGT and RSA conventions in Enterprise COBOL, COBOL for OS/390 & VM, and COBOL for MVS & VM are different than in VS COBOL II and COBOL/370. If you have COBOL applications that are coded to assume Register 9 or Register 13 values, you must change those programs so they do not have built-in assumptions about register values.

The following will allow you to find the TGT of an Enterprise COBOL, COBOL for OS/390 & VM, or COBOL for MVS & VM program:

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