New software, I'v just built, based on Terminal-BASIC 2.1-b1. It uses russian lexems, because the computer is used by my 5 years old daughter, who don't understand English and still can't read latin alphabet. Also I use my new ps/2 keyboard Arduino library, from https://bitbucket.org/starling13/libps2 . This library supports locales switching and controls the keyboard LEDs, as can be seen on the photo.