https://en.wikipedia.org/wiki/ZX81
origin - http://www.pipiscrew.com/?p=7026 5-march-1981-the-zx81-home-computer-launches-with-1kb-memory
https://en.wikipedia.org/wiki/ZX81
origin - http://www.pipiscrew.com/?p=7026 5-march-1981-the-zx81-home-computer-launches-with-1kb-memory