h6. [[OS SWI Calls]] h6(. » [[OS_FSControl]] h6((. » OS_FSControl 40 h2. OS_ FSControl 40 h5. (SWI &29) |_<^{width:4em}. Entry | | |<^. R0 |<^. 40 (&28) | |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved| h4. Use The purpose of this call is to set to exchange the current and previous directories. h4. Notes It is the equivalent of [[*Back|*Back]] command. i.e. swaps the previous directory with the current directory. h4. See also * [[OS_FSControl]] * [[*Back|*Back]]