h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » OS_Byte 9 h2. OS_Byte 9 h5. (SWI &06) |_<^{width:3em}. Entry | | |<^. R0|<^. 9 | |<^. R1|<^. New duration (in video frames, or 0 for 'forever')| |_<^{width:3em}. Exit|_<^. | |<^. R0|<^. Preserved | |<^. R1|<^. Previous duration | |<^. R2|<^. Corrupted | h4. Use The purpose of this call is to set the duration of the first flash colour in frames-per-second. h4. Notes A duration of 0 means display the first colour constantly. The current duration may be read with [[OS_Byte 195]], and may also be set with [[VDU 23,9]]. The second flash colour duration can be set using [[OS_Byte 10]]. h4. See also * [[OS_Byte]] * [[OS_Byte 10]] * [[OS_Byte 195]] * [[VDU 23,9]]