z/OS V1R7.0-V1R12.0 MVS Device Validation Support
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Entry to an HCD UIM
z/OS V1R7.0-V1R12.0 MVS Device Validation Support
SA22-7586-01
Upon entry, the UIM must:
Save the contents of the input registers.
Set the UIM base register.
Chain the save areas.
Set register 13 to point to the save area contained within the UIM.
Establish addressability to the UCA and IODV.
Issue the CBDIPPDS macro with parameter PUSH to put an entry on the diagnostic stack.
Copyright IBM Corporation 1990, 2014