Characteristics of the Open, Close and EOV Exits
These exits run under the following conditions:
Supervisor state
Protection key five
TCB mode
31-bit addressing mode
You must save and restore registers other than register 15.
Registers on Entry to the Open, Close and EOV Exits
Open, Close, and EOV Main Parameter List
Passing Information Between Exits
Open, Close, and EOV Return Codes
Parent topic:
Open, Close, End-of-Volume Tape Management Exits