Environment
- Authorization
- Problem state key 8, Supervisor state any key
- Dispatchable unit mode
- TCB
- Cross memory mode
- PASN = SASN = HASN
- Amode
- 24-bit, 31-bit, or 64-bit
- ASC mode
- Primary or AR
- Interrupt status
- Enabled for I/O and external interrupts
- Locks
- No locks held
- Control parameters
- Must be in the primary address space, key 8, and below the bar
- Error recovery
- The API does not provide error recovery