h6. [[OS SWI Calls]] h6(. » [[OS_FSControl]] h6((. » OS_FSControl 57 h2. OS_ FSControl 57 h5. (SWI &29) |_<^{width:4em}. Entry | | |<^. R0 |<^. 57 (&39) | |<^. R1 |<^. Pointer to name of object | |<^. R2 |<^. Least significant word of defect address | |<^. R3 |<^. Most significant word of defect address | |_<^{width:4em}. Exit | | |<^. R0|<^. Preserved| |<^. R1|<^. Preserved| |<^. R2|<^. Preserved| h4. Use The purpose of this call is to map out a defect from a large disc or image. h4. Notes This call uses 64 bit values, and thus can support large discs. If an error is returned try [[OS_FSControl 42]] which is used for smaller discs or images. h4. See also * [[OS_FSControl]] * [[OS_FSControl 42]]