Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Migration Guide

Assessing storage requirements

Enterprise PL/I object programs may execute in 31-bit addressing mode and can reside above the 16-MB line, which frees storage below the 16-MB line. You can use the freed storage for programs or data that must reside below the 16-MB line.

During the compiler migration, you will need DASD storage for your current PL/I compilers as well as for the Enterprise PL/I compiler. When you have completed the compiler migration, and if you have moved all of your OS PL/I, PL/I for MVS & VM, or VisualAge PL/I programs to Enterprise PL/I, you will be able to free the storage reserved for your current PL/I compiler.

The load module produced from the same source code when compiled with Enterprise PL/I may be larger than when compiled with OS PL/I or PL/I for MVS & VM.


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