Discussion on question by Алексей Григорьев: Как работать с символоми регистра в коде ASCII?

Imported from a comment discussion on http://ru.stackoverflow.com/questions/649236/%d0%9a%d0%b0%d0%ba-%d1%80%d0%b0%d0%b1%d0%be%d1%82%d0%b0%d1%82%d1%8c-%d1%81-%d1%81%d0%b8%d0%bc%d0%b2%d0%be%d0%bb%d0%be%d0%bc%d0%b8-%d1%80%d0%b5%d0%b3%d0%b8%d1%81%d1%82%d1%80%d0%b0-%d0%b2-%d0%ba%d0%be%d0%b4%d0%b5-ascii