h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » OS_Byte 243 h2. OS_Byte 243 h5. (SWI &06) |_<^{width:4em}. Entry | | |<^. R0|<^. 243 (&F3) | |<^. R1|<^. 0 | |<^. R2|<^. 255 | |_<^{width:4em}. Exit|_<^. | |<^. R0|<^. Preserved | |<^. R1|<^. Switch state | |<^. R2|<^. Corrupted | h4. Use The purpose of this call is to read the timer switch state. h4. Notes This call is deprecated. This call is obsolete - it reads which of the two copies of the centisecond clock is read/written to by [[OS_Word 3]] and [[OS_Word 4]], and which is updated on the 100Hz interrupt. In effect it provides a location that changes 100 times per second. h4. See also * [[OS_Byte]] * [[OS_Word 3]] * [[OS_Word 4]]