0xFF

Орешкин, кажется. https://yandex.ru/search/?text=%D0%BF%D1%80%D0%BE%D0%B5%D0%BA%D1%82%20%D0%BC%D0%B5%D1%80%D0%B8%D0%B4%D0%B8%D0%B0%D0%BD%20%D0%B0%D0%B2%D1%82%D0%BE%D0%B4%D0%BE%D1%80%D0%BE%D0%B3%D0%B0&clid=2332044-225&lr=213