h6. [[Hardware Abstraction Layer]] h6(. [[HAL entry points from RISC OS]] h6((. » HAL_IRQMax h2. HAL_IRQMax h5. (HAL entry #107) <pre> int HAL_IRQMax(void) </pre> |_<. Entry | | |- | | |_<. Exit | | |- |Returns the highest valid IRQ device number, plus one | h4. Use This call is used by the OS to determine the highest IRQ device number supported by the HAL/hardware. For example, if the IRQ controller in the device has 32 interrupt sources, and the HAL numbers them sequentially starting from zero, then HAL_IRQMax should return 32. h4. See also * [[HAL interrupt handling API]]