A fast and easily customised operating system
for ARM devices
Service_ModeExtension
Programmer's Reference Manuals
» Part 16 – Service Calls
» Service_ModeExtension
Service_ModeExtension
(Service &50)
| Entry | |
|---|---|
| R1 | 80 (&50) |
| R2 | Mode number |
| R3 | Monitor type, or -1 for ‘unspecified’ |
| Exit | |
|---|---|
| R1-R4 | Preserved to pass on, else: |
| R1 | 0 to claim service |
| R2 | Preserved |
| R3 | Pointer to VIDC list |
| R4 | Pointer to VIDC workspace list |
Use
This service is issued when a mode number that RISC OS does not provide is requested.
Notes
Mode numbers are categorised as per the information on the Screen Modes page.
VIDC parameters may differ for the same mode depending on monitor type, but workspace parameters must be constant.
See also
- Monitor Types
- Screen Modes
- Service Calls
- Service_FilerStarted?
- VIDC List
- VIDC Workspace List