Steven Reid·Sep 28, 2025Fun with DATA — Building a Blocky World Map on the ZX81I adapted a blocky world map program to the ZX81, working around its missing DATA command. The result is a fun, compressed map that runs.
Steven Reid·Aug 31, 2025Speeding Up Truchet Tiles on My ZX81 with Machine CodeTaking my ZX81 Truchet tiles program from BASIC to machine code for a big speed boost. Faster, smoother, and fun to watch in action.
InsantiagobustelobySantiago Bustelo·Aug 15, 2025Mis primeros 40 años en tecnología :)Este mes se cumplen 40 años de mi primer hito destacable en esta industria: cuando la revista K-64 publicó el pequeño programa que envié a…A response icon1A response icon1
Steven Reid·Jun 29, 2025Recreating Font Art on the ZX81-With Some LimitsA chance video inspired me to recreate font art on the ZX81 using character graphics. It worked — mostly. Here’s how it went (and where it…
Steven Reid·May 30, 2025A ZX81 Puzzle Makeover: No More INPUT DramaI revisited a classic logic puzzle on the ZX81 — this time with smoother controls and a better user experience. No INPUT prompts, just…
Steven Reid·May 1, 2025Castle Quest Was My Late-Night ZX81 Adventure with AIWith little time lately, I decided to explore some Generative AI ideas to flesh out new concepts. I’ve dabbled in vibe coding for some time…
Steven Reid·Oct 28, 2024Print Like a Pro on the ZX81 with This Updated Smooth Scroll RoutineThis updated print scroll routine mimics the ZX81’s PRINT command, offering smoother, more flexible output.
Steven Reid·Sep 10, 2024Living Dangerously With Math by Running the Collatz Conjecture on the ZX81Running random numbers against the 3x+1 math problem can be fun.
Steven Reid·Aug 9, 2024Writing a Utility Program for the ZX81 Was Such FunHere’s a quick program I wrote to turn Sinclair BASIC into assembly code.
Steven Reid·Jul 27, 2024Infinite Scrolling on the ZX81 with Machine Code MagicTaking a different approach to scrolling by combining ZX81 BASIc with machine code.
