h6. [[CDFSDriver]] h6(. » [[CDFSDriver SWI Calls|SWI Calls]] h6((. » CD_IsDrawerLocked h2. CD_IsDrawerLocked h5. (SWI &4125C) |_<^{width:4em}. Entry | | |<^. R7 |<^. Pointer to [[CDFS Control Block]] | |_<^{width:4em}. Exit | | |<^. R0 |<^. 0 if not locked, 1 if locked, or an error if not supported | h4. Use The purpose of this call is to check whether the CD drawer is locked. h4. Notes None. h4. See also * [[CDFS Technical Details]]