Retro Tag


Have some fun! Explore the 84 articles tagged with retro.
Super Simple ZX81 Scrolling Example
Although I've been busy working with the ZX81 this month, it has been with my Gem Quest game. Not much to share yet there, but I am working on it. To get in something for the month, I thought I'd share an old demo program instead…
Posted Jul 31 by Steven 1 min read

The Monster From the Deep Arrives on Your ZX81
This month’s program is a super simple graphic program I created in 1984 called The Monster. Probably developed as a title screen, the graphic looks like some swamp creature with seaweed hanging off it. I’m not positive what I was going for, but it does look rather imposing. # A tie to an older…
Posted Jun 30 by Steven 4 min read

Wandering Down the ZX81 Road
I had this idea on Sunday that led to today’s program—more about that in a minute. One of those sit down and do it programs, I banged this out pretty quick yesterday. Not wasting time, I decided today I’d share it. Road is a very simple program that I never intended to make…
Posted May 03 by Steven 7 min read

Adding More Movement to My Running Game
Well, hard to believe we are turning the corner on March and heading into April. Spring is edging its way in and it is time to get outside and work in the yard. This made me want to kick my ZX81 program to the curb, but it didn’t feel right. So, I bundled up my current progress on Run. # Pixel mo…
Posted Mar 30 by Steven 5 min read

Working on Bones for a Future ZX81 Game
For some time now, I’ve wanted to build a running type game. The kind where there is a single key to press and releasing it makes you take an action. There are lots of variations on this theme, and it seemed like something fun to try…
Posted Feb 19 by Steven 5 min read

Let’s Cook up a Faster Graphic Enlarger for the ZX81
I haven’t had much time for programming the last few months. To get back into things, I decided to take an old BASIC program of mine and rewrite it. Thinking about what to convert, my mind immediately went to Enlarger. It was a rather slow animation demo that could use an update. # Spoiled food …
Posted Jan 28 by Steven 7 min read

Digger Deeper Into My Water Bug II Game for the ZX81
Now, Water Bug II is an interesting game for me. I was so excited when completing the first version, that I wanted to build another version with ten more boards. The funny thing is, the games look a lot alike…
Posted Dec 25, 2021 by Steven 11 min read

Water Bug Was My Attempt at a ZX81 Action Game
For most of the day, I’ve 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…
Posted Nov 30, 2021 by Steven 17 min read

An Early and Bad Attempt at a Yars’ Revenge on the ZX81
Like many teenagers in the early eighties, I was playing video games on my Atari VCS. Yars’ Revenge was a popular purchase, and I spent many hours dodging that stupid missile and trying to take down the shields of the Qotile…
Posted Oct 31, 2021 by Steven 4 min read

Building a Better ZX81 Digital Rain using Z80 Assembler
My original plan was to create an z80 assembler version of Moon Lander. But with the trailer release for the next Matrix movie, I found myself revisiting another program. Built entirely in machine language, Z80 Digital Rain expands on my previous version with a splash of color…
Posted Sep 25, 2021 by Steven 8 min read

Amping up the Visuals and Gameplay in Moon Lander V2
Last month, I shared an old moon landing program I wrote back in the early 80s. Right after that, I decided to give it a bit of a face lift, updating the visuals without changing the game play. Moon Lander v2 is my updated game, yet still the same BASIC code under hood. A fun new look. As I noted…
Posted Aug 21, 2021 by Steven 8 min read

Try Not to Crash the Moon Lander in This ZX81 Game
When I first started programming, one of the games we would play on the old teletype machines was a simple moon lander game. The premise is you would use your thrusters to softly land on the moon. Moon Lander was my take of that program a few years later. A trip down memory lane. I actually enjoy…
Posted Jul 31, 2021 by Steven 6 min read

Your Imagination Is Required With Comp Control for the ZX81
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…
Posted Jun 24, 2021 by Steven 7 min read

Trying My Hand at Animation by Moving a Sailboat on My ZX81
I was hoping to have finished Gem Quest by now, but May didn’t 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…
Posted May 31, 2021 by Steven 5 min read

Having Fun Learning How to Draw Lines on My ZX81
When Simeon Dwyer shared his machine language line drawing routine, I immediately thought of redoing “The Picture.” 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…
Posted Apr 30, 2021 by Steven 6 min read

Not My Best Try at Programming an Ultima Clone
I’ve 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…
Posted Mar 31, 2021 by Steven 5 min read

A Developer Diary in Pictures for Gem Quest, a ZX81 RPG
If you’ve been following me the last couple of months, you know I’ve been revisiting Gem Quest. Intended to be an Ultima style game for the ZX81, outside of a few demo’s I really hadn’t gotten far. That isn’t the case now…
Posted Mar 07, 2021 by Steven 8 min read

How to Build a ZX81 Ultima Game Part 2: Gem Quest
After sharing Tiles, I started to dig into my previous attempts at building an adventure game. Digging through my past research, I thought about encoding the world differently. Sadly, my experiments using MCODER failed…
Posted Feb 25, 2021 by Steven 6 min read

How to Build a ZX81 Ultima Game
In 2012 I wanted to see if I could make an Ultima style game on the ZX81. I had an ambitious plan centered on the tile based graphics. After a few months of testing, I was able to create a working prototype called Tiles. Although the game isn’t done, the idea behind it shows promise…
Posted Jan 31, 2021 by Steven 10 min read

How I Used My ZX81 to Draw the Iconic OP Logo
As 2020 wound down, I had a couple of different ideas for new ZX81 programs. Most of them were graphic programs of various sorts. Themes ranged from dumpster fire pictures, an advent calendar, a virus action game, to a solo RPG…
Posted Dec 27, 2020 by Steven 4 min read

Creating Charts on Your ZX81 Couldn’t Be More Simple
As usual, I procrastinated a bit in finishing my ZX81 program for November. Between holidays, work, and NaNoWriMo, I didn’t get around to it until this last weekend. I decided to try something a little different for this month’s program…
Posted Nov 30, 2020 by Steven 7 min read

Entering a Program Shouldn't Be This Frustrating
Back in July, I made a mistake and entered in Star Probe again. I had forgotten that I’d already shared it. But, unlike my first attempt, I had taken a different approach which made it a much different game. Jumping ahead, I decided to finish what I started…
Posted Oct 25, 2020 by Steven 12 min read

Here Is a Silly Test Program for the ZX81
September proved to be a rather busy month, at work and home. It isn’t unusual for me, and I usually find time to throw a render or program together. As this month closed, I found myself in need of a program to share and not a lot of time…
Posted Sep 29, 2020 by Steven 3 min read

Here Is My Crazy Idea to Make a ZX81 Game with a Printer
Back in the day I learned to program on school PDP-11 with a 6 teletypes and a CRT attached. I was still in computer club at the time, thinking the 8" floppies were pretty cool. To my despair, the poor thing died that Summer and, when I took my programming class, it was on an Atari 800…
Posted Aug 29, 2020 by Steven 8 min read

Can You Win in This Easy Game of ZX81 Dice
Lately, I’ve been reflecting on my programming journey. It is hard to believe that it has been over nine years since I started writing my monthly articles. I’m nearing the end of my printouts, and thought I’d write about my ZX81 Dice Game. Walk down retro lane. Although I’d s…
Posted Jul 31, 2020 by Steven 5 min read