gtpm6m08 | Main Supervisor Reference |
System initialization consists of 4 functions:
- Initial program load (IPL). The initial program loader
loads the control program from auxiliary direct access storage devices (DASD)
into main storage.
- Main storage initialization. The initializer, CCCTIN,
allocates and initializes all of the main storage areas the control program
needs to operate.
- System restart. The system restart program activates a
series of ECB-controlled system programs, which place the system in a
condition to process real-time input.
- State change. The system state change program activates
and deactivates system resources and functions.