The only potentially relevant 'ARTOS' I found was here: http://en.wikipedia.org/wiki/Comparison_of_real-time_operating_systems http://en.wikipedia.org/wiki/Com

The only potentially relevant 'ARTOS' I found was here: http://en.wikipedia.org/wiki/Comparison_of_real-time_operating_systems http://en.wikipedia.org/wiki/Comparison_of_real-time_operati... Which lists an active X86 project and a defunct ARM project named ARTOS, both proprietary.