Entry | |
---|---|
R0 | Suggested mode number or Mode Selector Block |
R4 | Bits 0-15: 16 (reason code) |
Bits 16-23: Head number | |
Bits 24-31: Display number |
Exit | |
---|---|
R0 | Mode number/selector to use |
R4 | 0 |
- | All other registers preserved |
This call is issued by the kernel when it is deciding which screen mode to select when a driver is first activated. It allows the driver to override the supplied mode with one which is more appropriate, e.g. a device with a fixed size LCD may want to select a mode which fills the display.