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Service_PreModeChange
Programmer's Reference Manuals
» Part 16 – Service Calls
» Service_PreModeChange
Service_PreModeChange
(Service &4D)
| Entry | |
|---|---|
| R1 | 77 (&4D) |
| R2 | Mode number |
Case 1 – Module has not objection
| Exit | |
|---|---|
| R1 | Preserved to pass on |
| R2 | Preserved to pass on |
Case 2 – Module objects, and takes alternative action
| Exit | |
|---|---|
| R1 | 0 (claim service) |
| R2 | 0 |
Case 3 – Module objects, and returns an error
| Exit | |
|---|---|
| R0 | Pointer to error block) |
| R1 | 0 (claim service) |
Case 4 – Module wishes to substitute an alternative mode
| Exit | |
|---|---|
| R1 | Preserved to pass on |
| R2 | New mode number |
Use
This service allows a module to object to a mode change, or substitute a different mode.
Notes
Service_ModeTranslation offers a better method to support new monitor types.