| On entry: | - | ||
| On exit: |
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| Interrupts: | Interrupt status is unaltered Fast interrupts are enabled |
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| Processor Mode: | Processor is in SVC mode | ||
| Re-entrancy: | SWI is reentrant | ||
| Use: | The value returned is an unsigned
32 bit number which either rises or falls according to which way the mouse
wheel is turned. To calculate the delta use: delta=(old R0)-R0 This method permits multiple users of the wheel. |
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| Related SWIs: | - |