Released in 1990, the Didaktik M was a redesigned and more reliable alternative to the original Sinclair ZX Spectrum. It featured 48KB RAM, 16KB ROM, improved ergonomics, and a separate arrow key cluster.

A custom chip from Russian firm Angstrem replaced the original ULA, giving the display a square aspect ratio. Though it offered separate joystick ports (Sinclair and Kempston) and an expansion connector, these used non-standard formats. As a result, users across the former Czechoslovakia often built their own quirky, home-made peripherals, adding to the machine’s lasting charm among Eastern European computer enthusiasts.