h6. [[OS SWI Calls]] h6(. » [[OS_Byte]] h6((. » [[OS_Byte 129]] h6(((. » OS_Byte 129 (read OS version) h2. OS_Byte 129 (read OS version) h5. (SWI &06) |_<^{width:3em}. Entry | | |<^. R0|<^. 129 (&81) | |<^. R1|<^. 0| |<^. R2|<^. &FF | |_<^{width:3em}. Exit | | |<^. R0|<^. Preserved | |<^. R1|<^. [[OS Codes|OS Version]]| |<^. R2|<^. 0 | h4. Use The purpose of this call is to return a value that specifies the version of the Operating System. h4. See also * [[OS_Byte]] * [[OS_Byte 4]] * [[OS_Byte 124]] * [[OS_Byte 126]] * [[OS_Byte 129 (time)|OS_Byte 129 (read a key within time limit)]] * [[OS_Byte 129 (scan range)|OS_Byte 129 (scan keyboard for range of keys)]] * [[OS_Byte 129 (scan single)|OS_Byte 129 (scan keyboard for single key)]] * [[OS Codes]] [linkx2]OS_Byte+129+(OS)