h6. [[OS SWI Calls]] h6(. » [[OS_UpCall]] h6((. » OS_UpCall 19 h2. OS_UpCall 19 h5. (SWI &33) |_<^{width:4em}. Entry | | |<^. R0 |<^. 19 (&13)| |<^. R1 |pointer to message string| |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved | h4. Use The purpose of this call is to inform your application that a missing filing medium has been supplied, or that an operation involving one has been cancelled. h4. Notes This call is identical to [[OS_UpCall 4]] except that the message pointed to by R1 is displayed. This is useful where there may be some time before another screen update, for example during printing. h4. See also * [[OS_UpCall]] * [[OS_UpCall 4]]