h6. [[OS SWI Calls]] h6(. » [[OS_FSControl]] h6((. » OS_FSControl 18 h2. OS_ FSControl 18 h5. (SWI &29) |_<^{width:4em}. Entry | | |<^. R0 |<^. 18 (&12) | |<^. R2 |<^. Filetype (bits 0-11)| |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved | |<^. R2 |<^. First four chars | |<^. R3 |<^. Final four chars | h4. Use The purpose of this call is to decode a filetype into text. h4. Notes This SWI issues [[Service_LookupFileType]]. If unclaimed, it builds a default string. The string is 8 characters long, suffixed with spaces as necessary. h4. See also * [[OS_FSControl]] * [[Service_LookupFileType]]