h6. [[SoundDMA]] h6(. » [[SoundDMA SWI Calls|SWI Calls]] h6((. » Sound_ReadSysInfo h2. Sound_ReadSysInfo h5. (SWI &40147) |_<^{width:4em}. Entry | | |<^. R0 |<^. [[Sound_ReadSysInfo Reason Codes|Reason code]] | |\2<^. All other registers are dependent on reason code| |_<^{width:4em}. Exit | | |<^. R0 |<^. 0 | |\2<^. All other registers dependent on reason code| h4. Use The purpose of this call is to allow you to read various parameters of the sound system. h4. Notes The action performed depends on the reason code value in R0. 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 SWI Calls]]