h6. [[SoundDMA]] h6(. » [[SoundDMA SWI Calls|SWI Calls]] h6((. » [[Sound_ReadSysInfo]] h6(((. » Sound_ReadSysInfo 1 h2. Sound_ReadSysInfo 1 |_<^{width:4em}. Entry | | |<^. R0 |<^. 1 (reason code) | |_<^{width:4em}. Exit | | |<^. R0 |<^. 0 | |/4<^. R1 |<^. Flags: | |<^. Bit 0: Generates service calls [[Service_Sound 8|Sound rate changing]], [[Service_Sound 9|Sound starting]], [[Service_Sound 10|Sound stopping]] | |<^. Bit 1: SWIs [[Sound_SelectDefaultController]], [[Sound_EnumerateControllers]], [[Sound_ControllerInfo]] supported | |<^. Bits 2-31: Reserved | h4. Use The purpose of this call is to read the features of the version of SoundDMA installed on the system. h4. Notes Many versions of SoundDMA do not return errors when unknown SWIs are called. Therefore, to detect if this SWI is supported, check if R0 has been set to 0 on exit (Valid reason codes start at 1). h4. See also * [[Sound_ReadSysInfo]]