This line of computers is really a testament to the ingenuity of people from the Soviet Bloc at a time when resources were few. There's so many stories of them harnessing the limited computing/calculator power they had to play games, run simulations, and more. This era minted a generation of techies that formed the foundation of the tech industry there today. Here's some examples of the clever tricks these hackers did to push their machines to the limit:
https://hackaday.com/2014/12/15/home-computers-behind-the-ir...
https://mitpress.mit.edu/books/gaming-iron-curtain
https://spectrum.ieee.org/tech-history/silicon-revolution/ho...