h6. [[OS SWI Calls]] h6(. » [[OS_Args]] h6((. » OS_Args 9 h2. OS_Args 9 h5. (SWI &09) |_<^{width:3em}. Entry | | |<^. R0|<^. 9 (reason code) | |<^. R1|<^. File handle | |<^. R2|<^. [[IOCtl Parameter Block]]| |_<^{width:3em}. Exit || |<^. R0|<^. Preserved | |<^. R1|<^. Preserved | |<^. R2|<^. Preserved | h4. Use The purpose of this call is to perform an IOCtl function. h4. See also * [[IOCtl Parameter Block]] * [[OS_Args]]