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Randomizer module interface
The randomizer module interface environment conforms to the published interface, with the following exceptions:
When a randomizer is invoked by IMS, register 10 contains the address of the EPST and register 11 contains the address of the ESCD. Some user-written or user-customized randomizers have been designed to use these addresses to gain access to IMS/VS control blocks other than those that are passed as part of the published interface.
When a Fast Path Online Suite product issues a call to a randomizing module, register 10 is set to -1 and register 11 is set to 0 to indicate that the call is not being issued in a live IMS environment.