Every once in a while, a small, silly idea turns into a surprisingly fun little project. That’s exactly what happened with my latest ZX81 experiment, a reaction-based game inspired by the old nursery rhyme: Duck, Duck, Goose.
My Retro Computing Binge, Falling Back in Love With Hardware
Lately I’ve been on a binge — a retro computing hardware binge. It started last year when I went searching for a working Timex Sinclair 1000. The idea was simple. Set it up and run my own programs on real hardware again. What began as a hunt for one machine quickly turned into something bigger.
Building a Flip-Style Digital Clock on the ZX81
I’d been thinking about writing a better clock program for the ZX81 for some time but never acted on it. That is, until yesterday when I saw a flip-style digital clock program on the C64. The result is a sort of digital flip clock program for the ZX81 that ended up being quite a fun journey.
Experimenting with Binary Space Partitioning on the ZX81
I thought I’d try something a bit different this month. I’d been looking at different ways to build maps for years but never really did much with them. After watching a video on binary partitioning, I decided to see if I could build a simple map builder on the ZX81.
This is the result.
Drawing a Twisted Cylinder on the ZX81
I wrote this back in August and I’m finally getting around to publishing it. It was first shared in my BASIC group, but the ZX81 lacks a lot of the functionality needed for it to run well. Undeterred, I hacked at the program to not only display the twisted cylinder, but also add a bit of randomness to the demo.
Fun with DATA — Building a Blocky World Map on the ZX81
I’d seen a few different BASIC programs that print out a map of the world. Generally blocky, they still looked decent, but much of the data was too big for the ZX81—until I ran across a C64 version based on a Spectrum program. Examples in hand, I built a version for the ZX81.
Speeding Up Truchet Tiles on My ZX81 with Machine Code
Having finished my last Truchet tiles program in BASIC, I wondered how fast it would run in machine code. Soon afterward, I gave it a try, writing a version that runs significantly faster than the BASIC one. Let’s dive in and see how it works.
Exploring Truchet Tiles on the ZX81 with BASIC
Sometimes ideas drop right into your lap. In the case of this month’s program, it was a mix of a post and a video that led me to this Truchet animation. A simple concept, but it worked way better on the ZX81 than I expected.
Recreating Font Art on the ZX81—With Some Limits
It’s funny how a random video can spark an idea. One moment I’m watching someone play around with ASCII art, and the next I’m thinking, “Hey, I could make something like that on the ZX81.” That little spark turned into a weekend project: a simple banner program using different fonts. How fun!
A ZX81 Puzzle Makeover: No More INPUT Drama
This month’s program is a bit of a departure. It is a take on the classic "Wolf, Goat, Cabbage" puzzle. The twist is, I didn’t write this one. Instead, I decided to update it to make the interface a bit easier to use. Let’s dive into the code.