A fast and easily customised operating system
for ARM devices
OS_ReadModeVariable
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_ReadModeVariable
OS_ReadModeVariable
(SWI &35)
| Entry | |
|---|---|
| R0 | Screen mode, or -1 for current |
| R1 | Variable number |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
| R2 | Value of variable |
| C flag is set if variable or mode were invalid | |
Use
The purpose of this call is to read information about a particular screen mode without having to change into that mode.