A fast and easily customised operating system
for ARM devices
GraphicsV 2
GraphicsV
» GraphicsV 2
Graphics Vector (42)
| Entry | |
|---|---|
| R0 | VIDC List Type 3 |
| R4 | Bits 0-23: 2 (reason code) |
| Bits 24-31: Driver number |
| Exit | |
|---|---|
| R4 | 0 |
| - | All other registers preserved |
Use
The kernel issues this call in order to instruct the display driver to change the display mode. The appropriate driver should respond by changing to the requested mode and setting R4 to 0 to claim the call.
Notes
Prior to changing the mode, the OS will always call GraphicsV 7 to check that the driver supports the mode. Drivers must implement the vet mode call to allow them to object to unsupported modes, as there is currently no way for a driver to refuse a mode change when GraphicsV 2 is called.
See also
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