Reid's For Fun


My personal blog for what interests this computer guy. Web development, LEGO ray tracing, ZX81 retro computing, writing and photography.

Water Bug Was My Attempt at a zx81 Action Game

Water Bug, Board 1 ZX81 Screenshot, 1984 by Steven Reid

For most of the day, Iíve been thinking about my Water Bug game as I never really gave it a proper write-up. Finally got around to playing it again, I was surprised to find elements in that I thought were unique to Water Bug II are actually in this version. That made me want to walk through each board, understanding better what I had done, what worked, and what didnít. Letís dive right in.


An Early and Bad Attempt at a Yarsí Revenge on the ZX81

Yarsí Revenge, a ZX81 Screenshot, 1983 by Steven Reid

Like many teenagers in the early eighties, I was playing video games on my Atari VCS. Yarsí Revenge was a popular purchase, and I spent many hours dodging that stupid missile and trying to take down the shields of the Qotile. It then should come at no surprise that I tried to recreate that game at 13. My attempt on the ZX81 didnít look horrible, but it sure played bad. Letís see how much.





Your Imagination Is Required With Comp Control for the ZX81

Comp Control,  Commands Screenshot, 1984 by Steven Reid.

As a young teenager, I often wrote programs that I would integrate into other play. In this case, I had probably watched War Games again. The idea of a computer talking to you made for some fun fantasy play. Comp Control a little pretend play where my lowly ZX81 mimicked a much more sophisticated world. Iím sure I was running around my room thinking up some crazy way to save the world.


Revisiting Running Blender in Apple Silicon Using a MacBook Pro M1

Spring Fall v2 by Steven Reid, on Flickr

While watching a review for the new M1 iMac, they ran the typical Blender test as a benchmark. That wasnít overly surprising, but the reviewer did say something that peaked my interest. Apparently, the latest version of Blender now supported Apple Silicon. Tucking that tidbit away at the time, I got around to downloading LTS 2.93 today and giving it a whirl.


Trying My Hand at Animation by Moving a Sailboat on My ZX81

Picture In Motion, 2021 by Steven Reid

I was hoping to have finished Gem Quest by now, but May didnít afford much time. With Summer arriving and the pandemic seeming to be winding down, at least in Boise, my attention is elsewhere. With a short list of ideas, I decided to play off last month's theme. Picture in Motion isnít new, but it is more interesting to watch.


Having Fun Learning How to Draw Lines on My ZX81

Picture Asm, by Steven Reid, 2021

When Simeon Dwyer shared his machine language line drawing routine, I immediately thought of redoing ďThe Picture.Ē Most of my z80 assembly has been with my Gem Quest game. I decided it would be a nice diversion to work on something else, even if a quick one. Picture Asm is the result of that diversion.


Not My Best Try at Programming an Ultima Clone

ZX-Ultima, by Steven Reid, 2012

Iíve talked about ZX-Ultima before. It was first attempt at building an Ultima like game on the ZX81 using BASIC. Written in 2012, it was a pretty ambitious project for me. I really enjoyed playing Ultima III on my C64 as a teenager. I always wondered what it would look like on my ZX81. It was bad. Yet, at the same time you could see the seeds of what would come later.