The display trace exit routine receives control in the following environment:
| Environmental factor | Requirement |
|---|---|
| Authorization: | Supervisor state and PSW key 0 |
| Dispatchable unit mode: | Task |
| Cross memory mode: | PASN = HASN = SASN |
| AMODE: | 31-bit. All passed areas can be above 16 megabytes in virtual storage. |
| ASC mode: | Primary |
| Interrupt status: | Enabled for I/O and external interrupts |
| Locks: | No locks held |
| Serialization: | Component trace prevents multiple conflicting commands from being processed simultaneously. |
| Location: | The display routine must be in LPA
or the LNKLST concatenation. If the display routine is in LPA, the system passes control to the module at that location, and the module is not page-fixed. Otherwise, the system places the display routine into the fixed common service area (CSA). |
Exit recovery: The display routine must supply its own ESTAE-type recovery routine or functional recovery routine (FRR) for any needed recovery or cleanup of resources.