Developed in Elstroj and produced by Tesla Liberec and later Tesla Blatna, the Ondra was a low-cost system intended for computing initiation at home and school.
It was build around the U880 processor (East-German version of the Z80). It featured 64 KB RAM, 4 KB ROM and had 320 x 255 graphic capabilities. Three peripherals could be connected, a tape recorder, a Parallel printer and a joystick.
Only 1000 units were ever made. Then Tesla wanted to give the manufacturing to other firm. Unfortunately that never happened.
Picture and information from Jan Krupka
BUILT IN LANGUAGE
None. BASIC language must be loaded from the tape.