OS_ScreenMode 4 (changes)
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OS SWI Calls
» OS_ScreenMode
» OS_ScreenMode 4
OS_ScreenMode 4
(SWI &65)
| Entry | |
|---|---|
| R0 | 4 |
| R1 | flags. , or -1 to read current value |
| bit 0 = set to suspend cached screen until mode change | |
| bit 1 = set to suspend screen cleaning | |
| bit 2 = set to disable hardware acceleration | |
| Other = reserved, must be 0 | |
| R2 | number of VSyncs between automatic screen cleaning (1-3), or -1 to read current value |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | new flag state (value actually invoked given any restrictions for current platform), or current flag state if R1 = -1 on entry |
| R2 | new number of VSyncs between automatic screen cleaning, or current number of VSyncs if R2 = -1 on entry |
Use
This SWI is used to configure the acceleration in use by the current display driver.
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