MVS protection key for CICS

CICS® can run only in MVS™ protection key 8 (the default). You must not define any other protection keys for CICS.

If you want to use the storage protection facility of CICS, you must specify the system initialization parameter STGPROT=YES, and must have the required hardware and software. If you operate CICS with storage protection, CICS observes the storage keys and execution keys that you specify in various system and resource definitions. For information about the CICS storage protection facility, and how it affects the storage allocation for the dynamic storage areas, see the CICS System Definition Guide. For information about hardware and software that is required by the CICS storage protection facility, see the CICS Transaction Server for z/OS® Program Directory.

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