[Gabriel Gambetta] knows a few things about ray tracers, being the author of Tiny Raytracer, a raytracer written in just 912 bytes of JavaScript. As a long-time fellow sufferer of the UK-designed Z… ...

This is rather essential on the Spectrum, since each key is also used to generate symbols and BASIC keywords: for instance, the “K” key also functions as LIST, +, LEN and SCREEN$.

Via the BASIC programming language on the ZX machines, homebrew development boomed, leading to the formation of many of the most popular developers of the ‘80s.