Writing a Demoscene Intro for the ZX Spectrum

A DevOps architect and musician recreated a demoscene intro for the ZX Spectrum computer, a nostalgic project inspired by the Amiga "cracktros" he admired in the late 1980s. His finished 10KB production features classic demo scene effects including scrolling text, a three-channel AY soundtrack, VU meters, and a parallax starfield running on a stock 128KB Spectrum. The technical blog post details the assembly language tricks and Spectrum knowledge required to build this hand-coded retro demo over several months.