h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » OS_Byte 19 h2. OS_Byte 19 h5. (SWI &06) |_<^{width:3em}. Entry | | |<^. R0|<^. 19 (&13) | |_<^{width:3em}. Exit|_<^. | |<^. R0|<^. Preserved | |<^. R1|<^. Corrupted | |<^. R2|<^. Corrupted | h4. Use The purpose of this call is to wait for the vertical sync. h4. Notes This call takes the control of the ARM until the electron beam of the monitor has reached its last position and jumps to the top left of the screen. h4. See also * [[OS_Byte]]