This SVC displays a message on the screen (WTO and WTOR)).
The WTO buffer must be in the following format:
| Bytes | Description |
|---|---|
| 0 | Binary zero. |
| 1 | Length of display message plus 4 |
| 2-3 | Multiple console routing flags (not used) |
| 4-nn | The text to be displayed on the screen. |
The WTOR buffer must be in the following format:
| Bytes | Description |
|---|---|
| 0 | x'80'. |
| 1-3 | Address of reply buffer. |
| 5-7 | Address of reply event control block (not used) |
| 8 | Binary zero |
| 9 | Length of reply in bytes |
| 10 | Length of display message plus 4 |
| 11-12 | Multiple console routing flags (not used) |
| 13-nn | The text to be displayed on the screen. |