h6. [[OS SWI Calls]] h6(. » OS_UnusedSWI h2. OS_UnusedSWI h5. (SWI &19) |_<^{width:4em}. Entry | | |<^. R0 |<^. Address of the [[Unused SWI Handler|Unused SWI handler]], or 0 to read | |_<^{width:4em}. Exit | | |<^. R0 |<^. Address of previous [[Unused SWI Handler|Unused SWI handler]] | h4. Use The purpose of this call is to set up the handler for unused SWIs. h4. Notes This call is deprecated. Please use [[OS_ChangeEnvironment]] instead. h4. See also * [[OS_ChangeEnvironment]] * [[Unused SWI Handler]]