Totally stunned that the Pico MZ-80K won the "general" category in last year's #RetroChallenge! Thank you to everyone who voted for me, followed the project, etc. etc. etc. #RetroComputing
www.retrochallenge.org/2025/10/rc20...
www.retrochallenge.org/2025/10/rc20...
RC2024/10 Results...Less than a Year Late!
With so many entries for RC2024/10 (a record, i'm sure!), and having already put in so much work during the month, I really let things slide...
www.retrochallenge.org
October 29, 2025 at 8:37 PM
Totally stunned that the Pico MZ-80K won the "general" category in last year's #RetroChallenge! Thank you to everyone who voted for me, followed the project, etc. etc. etc. #RetroComputing
www.retrochallenge.org/2025/10/rc20...
www.retrochallenge.org/2025/10/rc20...
Ever wondered how an electro-mechanical noughts and crosses (Tic-tac-toe) machine from the 1940/50s works? Follow our volunteer, Ian, as he reverse engineers one of our artefacts, The Drof Computox, and blogs his journey.
drof-computox.blogspot.com
#retrochallenge #swindon #museum
drof-computox.blogspot.com
#retrochallenge #swindon #museum
October 20, 2025 at 5:17 PM
Ever wondered how an electro-mechanical noughts and crosses (Tic-tac-toe) machine from the 1940/50s works? Follow our volunteer, Ian, as he reverse engineers one of our artefacts, The Drof Computox, and blogs his journey.
drof-computox.blogspot.com
#retrochallenge #swindon #museum
drof-computox.blogspot.com
#retrochallenge #swindon #museum
I've been working a bit more on my #RetroChallenge, getting an #RC2014 to talk to a NES controller.
In my latest post, I explain how I've used Z80 assembly language to work out which buttons are being pressed and to print this back over the serial terminal.
www.robertprice.co.uk/robblog/rc20...
In my latest post, I explain how I've used Z80 assembly language to work out which buttons are being pressed and to print this back over the serial terminal.
www.robertprice.co.uk/robblog/rc20...
RC2025 - Part 4 - Bit-banging a NES controller using Z80 assembly language - Robert Price
In this article I bit-bang an NES controller from my RC2014 using Z80 assembly language. The results are then sent to the serial terminal.
www.robertprice.co.uk
October 17, 2025 at 2:14 PM
I've been working a bit more on my #RetroChallenge, getting an #RC2014 to talk to a NES controller.
In my latest post, I explain how I've used Z80 assembly language to work out which buttons are being pressed and to print this back over the serial terminal.
www.robertprice.co.uk/robblog/rc20...
In my latest post, I explain how I've used Z80 assembly language to work out which buttons are being pressed and to print this back over the serial terminal.
www.robertprice.co.uk/robblog/rc20...
More work on the #RC2014 NES controller #RetroChallenge this evening.
I have designed a circuit and PCB that should allow me to bit-bang the NES controller from my RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
I have designed a circuit and PCB that should allow me to bit-bang the NES controller from my RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
RC2025 - Part 2 - Designing a PCB for bit-banging a NES controller - Robert Price
Designing a PCB to allow me to bit-bang an NES controller on my RC2014 computer.
www.robertprice.co.uk
October 9, 2025 at 9:27 PM
More work on the #RC2014 NES controller #RetroChallenge this evening.
I have designed a circuit and PCB that should allow me to bit-bang the NES controller from my RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
I have designed a circuit and PCB that should allow me to bit-bang the NES controller from my RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
It's official, I'm taking part in this year's #RetroChallenge
I'm planning on getting an NES controller working with my #RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
I'm planning on getting an NES controller working with my #RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
RC2025 - Part 1 - How does the NES controller send data? - Robert Price
For this year’s RetroChallenge, I am hoping to interface an NES / Famicon controller to my RC2014 computer. The NES controller has 8 buttons: Up, Down, Left, Right, Select, Start, A, and B. The cable ...
www.robertprice.co.uk
October 8, 2025 at 7:30 PM
It's official, I'm taking part in this year's #RetroChallenge
I'm planning on getting an NES controller working with my #RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
I'm planning on getting an NES controller working with my #RC2014 computer.
www.robertprice.co.uk/robblog/rc20...
I tried to expand on my #RetroChallenge and build an #RC2014 module that could decode the 8 bits returned from a NES controller using just 74 series logic and a 555 timer.
It didn’t work. I think I have the timing slightly out so some of the logic is triggering too early. I need a dual scope!
It didn’t work. I think I have the timing slightly out so some of the logic is triggering too early. I need a dual scope!
November 6, 2025 at 1:35 PM
I tried to expand on my #RetroChallenge and build an #RC2014 module that could decode the 8 bits returned from a NES controller using just 74 series logic and a 555 timer.
It didn’t work. I think I have the timing slightly out so some of the logic is triggering too early. I need a dual scope!
It didn’t work. I think I have the timing slightly out so some of the logic is triggering too early. I need a dual scope!
I'm not able to take part in #RetroChallenge this year, but I've just spent a few minutes enjoying last year's writeup of my #Sharp #MZ80K emulator for the #RaspberryPiPico . The plan for winter is to have a bash at #MZ700 emulation - faster clock & colour too!
z80.timholyoake.uk/retrochallen...
z80.timholyoake.uk/retrochallen...
RetroChallenge 2024/10 – retrocomputing ephemera
z80.timholyoake.uk
October 11, 2025 at 11:52 AM
I'm not able to take part in #RetroChallenge this year, but I've just spent a few minutes enjoying last year's writeup of my #Sharp #MZ80K emulator for the #RaspberryPiPico . The plan for winter is to have a bash at #MZ700 emulation - faster clock & colour too!
z80.timholyoake.uk/retrochallen...
z80.timholyoake.uk/retrochallen...
📼 Game 145 is Back in the Day!
Did you cruise through today’s puzzle like a retro rewind, or did it leave you stuck in the past? 🎶📺
👉 llamagrama.com
#Llamagrama #WordPuzzle #BackInTheDay #Game145 #LlamaNation #LlamaHerd #WQuers #RetroChallenge
Did you cruise through today’s puzzle like a retro rewind, or did it leave you stuck in the past? 🎶📺
👉 llamagrama.com
#Llamagrama #WordPuzzle #BackInTheDay #Game145 #LlamaNation #LlamaHerd #WQuers #RetroChallenge
September 7, 2025 at 12:08 AM
📼 Game 145 is Back in the Day!
Did you cruise through today’s puzzle like a retro rewind, or did it leave you stuck in the past? 🎶📺
👉 llamagrama.com
#Llamagrama #WordPuzzle #BackInTheDay #Game145 #LlamaNation #LlamaHerd #WQuers #RetroChallenge
Did you cruise through today’s puzzle like a retro rewind, or did it leave you stuck in the past? 🎶📺
👉 llamagrama.com
#Llamagrama #WordPuzzle #BackInTheDay #Game145 #LlamaNation #LlamaHerd #WQuers #RetroChallenge
#RetroChallenge 2022/10 - I'm in again this year and ready to GeoCities again... but better! https://t.co/eQLWBtb5PJ We're a third of the way through the month already! 🙃🥳 https://t.co/FdT07wxlzb
October 10, 2022 at 9:44 AM
#RetroChallenge 2022/10 - I'm in again this year and ready to GeoCities again... but better! https://t.co/eQLWBtb5PJ We're a third of the way through the month already! 🙃🥳 https://t.co/FdT07wxlzb
Today in #RetroChallenge #PERQ : pull socketed chips out of EIO board to see what's dragging down the data bus! (Spoiler: it is none of the socketed chips.)
September 3, 2024 at 12:12 AM
Today in #RetroChallenge #PERQ : pull socketed chips out of EIO board to see what's dragging down the data bus! (Spoiler: it is none of the socketed chips.)
A small update to my Rotary Encoder for the #RC2014 #RetroChallenge
I have refined the Z80 Assembly Language program I was using so it is less sensitive and more usable.
www.robertprice.co.uk/robblog/rc20...
I have refined the Z80 Assembly Language program I was using so it is less sensitive and more usable.
www.robertprice.co.uk/robblog/rc20...
RC2024 – Part 8 – Refining The Rotary Encoder Z80 Assembly Language Program - Robert Price
A small update to the RC2014 Z80 Assembly Language program that reads from the Rotary Encoder Module and displays on the Digital I/O module.
www.robertprice.co.uk
October 12, 2024 at 11:29 AM
A small update to my Rotary Encoder for the #RC2014 #RetroChallenge
I have refined the Z80 Assembly Language program I was using so it is less sensitive and more usable.
www.robertprice.co.uk/robblog/rc20...
I have refined the Z80 Assembly Language program I was using so it is less sensitive and more usable.
www.robertprice.co.uk/robblog/rc20...
The #RetroChallenge has drawn to an end. I look back at what I learnt and achieved with my Rotary Encoder for the #RC2014 project.
www.robertprice.co.uk/robblog/rc20...
www.robertprice.co.uk/robblog/rc20...
RC2024 – Part 16 – Retro Challenge Completed - Robert Price
The Retro Challenge 2024 has come to an end. I look back at how my month progressed and at the finished Rotary Encoder module for the RC2014.
www.robertprice.co.uk
October 31, 2024 at 9:37 PM
The #RetroChallenge has drawn to an end. I look back at what I learnt and achieved with my Rotary Encoder for the #RC2014 project.
www.robertprice.co.uk/robblog/rc20...
www.robertprice.co.uk/robblog/rc20...
The two new versions of the Rotary Encoder Module for the #RC2014 that I have designed for this year's #RetroChallenge have arrived.
I've soldered them up and tested them, and they work perfectly.
www.robertprice.co.uk/robblog/rc20...
I've soldered them up and tested them, and they work perfectly.
www.robertprice.co.uk/robblog/rc20...
RC2024 – Part 14 – New Rotary Encoder PCBs - Robert Price
Versions 1.2 and 1.3 of the Rotary Encoder Module for the RC2014 have arrived. I've soldered them up and have now been tested.
www.robertprice.co.uk
October 30, 2024 at 4:48 PM
The two new versions of the Rotary Encoder Module for the #RC2014 that I have designed for this year's #RetroChallenge have arrived.
I've soldered them up and tested them, and they work perfectly.
www.robertprice.co.uk/robblog/rc20...
I've soldered them up and tested them, and they work perfectly.
www.robertprice.co.uk/robblog/rc20...
Folks, the #RetroChallenge #PERQ's video corruption is so weird: besides odd letterforms, it's invented new ligatures (en.wikipedia.org/wiki/Ligatur... ).`i` looks like `i|` and blanks part of the next letter. `y` or `y¦` does less blanking but NOT for the letter `o`, or `ϕ`. There are others!
October 27, 2024 at 11:01 PM
Folks, the #RetroChallenge #PERQ's video corruption is so weird: besides odd letterforms, it's invented new ligatures (en.wikipedia.org/wiki/Ligatur... ).`i` looks like `i|` and blanks part of the next letter. `y` or `y¦` does less blanking but NOT for the letter `o`, or `ϕ`. There are others!
I decided to dress up for the show. And since I received so many compliments on my retro outfit, I am doing this piece to show you just how affordably I put it together. @ArianaSavalas @PMJofficial #retro
#RetroChallenge #RetroStyle
#RetroChallenge #RetroStyle
November 19, 2024 at 1:41 PM
I decided to dress up for the show. And since I received so many compliments on my retro outfit, I am doing this piece to show you just how affordably I put it together. @ArianaSavalas @PMJofficial #retro
#RetroChallenge #RetroStyle
#RetroChallenge #RetroStyle
> Une petite photo noir et blanc pour l'art ? Allez hop on passe en mode vintage alors ! 📸🖤 #RetroChallengeag/RetroChallenge" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#RetroChallenge
February 3, 2025 at 8:09 AM
> Une petite photo noir et blanc pour l'art ? Allez hop on passe en mode vintage alors ! 📸🖤 #RetroChallengeag/RetroChallenge" class="hover:underline text-blue-600 dark:text-sky-400 no-card-link">#RetroChallenge
I've soldered up the PCB for my RC2014 NES Controller #RetroChallenge
Thankfully, it all seems to work, so I've written about how to use this from MS-BASIC.
www.robertprice.co.uk/robblog/rc20...
Thankfully, it all seems to work, so I've written about how to use this from MS-BASIC.
www.robertprice.co.uk/robblog/rc20...
RC2025 – Part 3 – Bit-banging a NES controller from BASIC - Robert Price
In this article I use MS-BASIC on an RC2014 computer to talk to an NES controller using bit-banging.
www.robertprice.co.uk
October 14, 2025 at 3:48 PM
I've soldered up the PCB for my RC2014 NES Controller #RetroChallenge
Thankfully, it all seems to work, so I've written about how to use this from MS-BASIC.
www.robertprice.co.uk/robblog/rc20...
Thankfully, it all seems to work, so I've written about how to use this from MS-BASIC.
www.robertprice.co.uk/robblog/rc20...
For this year's #RetroChallenge, I have built a rotary encoder module for the #RC2014 computer.
I have been able to use this in BASIC, now it's time to use Z80 Assembly Language.
This is how to build Z80 assembly language programs for the RC2014 Classic 2.
www.robertprice.co.uk/robblog/rc20...
I have been able to use this in BASIC, now it's time to use Z80 Assembly Language.
This is how to build Z80 assembly language programs for the RC2014 Classic 2.
www.robertprice.co.uk/robblog/rc20...
RC2024 – Part 6 – Getting Z80 Assembly Language Programs On To The RC2014 Classic 2 - Robert Price
As part of this year's Retro Challenge, I am building a rotary encoder module for the RC2014 computer. I have built a custom PCB, and I can use it from BASIC. However, I would also like to be able to ...
www.robertprice.co.uk
October 9, 2024 at 12:07 PM
For this year's #RetroChallenge, I have built a rotary encoder module for the #RC2014 computer.
I have been able to use this in BASIC, now it's time to use Z80 Assembly Language.
This is how to build Z80 assembly language programs for the RC2014 Classic 2.
www.robertprice.co.uk/robblog/rc20...
I have been able to use this in BASIC, now it's time to use Z80 Assembly Language.
This is how to build Z80 assembly language programs for the RC2014 Classic 2.
www.robertprice.co.uk/robblog/rc20...
The PCBs have arrived for my #RetroChallenge, so I have soldered one up and plugged it into my #RC2014.
I now have a working Rotary Encoder module on my RC2014 computer!
www.robertprice.co.uk/robblog/rc20...
I now have a working Rotary Encoder module on my RC2014 computer!
www.robertprice.co.uk/robblog/rc20...
RC2024 - Part 5 - Building And Testing The PCB - Robert Price
The PCB for my RC2014 Rotary Encoder module has arrived so I solder it up and give it a test. I can successfully use it to control LEDs.
www.robertprice.co.uk
October 8, 2024 at 3:19 PM
The PCBs have arrived for my #RetroChallenge, so I have soldered one up and plugged it into my #RC2014.
I now have a working Rotary Encoder module on my RC2014 computer!
www.robertprice.co.uk/robblog/rc20...
I now have a working Rotary Encoder module on my RC2014 computer!
www.robertprice.co.uk/robblog/rc20...
Modern Games?
Nah, Let's Keep It Brutally Retro! 🎮🕹️
#retrochallenge #gamerlife #indiegames #gamingfrustration #metroidvania #bossfight #doublejump #hardgames #retrostyle #ps5gaming #keymailer #littledroid #StaminaZero
youtube.com/shorts/ZC82O...
Nah, Let's Keep It Brutally Retro! 🎮🕹️
#retrochallenge #gamerlife #indiegames #gamingfrustration #metroidvania #bossfight #doublejump #hardgames #retrostyle #ps5gaming #keymailer #littledroid #StaminaZero
youtube.com/shorts/ZC82O...
Modern Games? Nah, Let's Keep It Brutally Retro! 🎮🕹️
YouTube video by FenderXT
youtube.com
April 29, 2025 at 9:52 PM
Modern Games?
Nah, Let's Keep It Brutally Retro! 🎮🕹️
#retrochallenge #gamerlife #indiegames #gamingfrustration #metroidvania #bossfight #doublejump #hardgames #retrostyle #ps5gaming #keymailer #littledroid #StaminaZero
youtube.com/shorts/ZC82O...
Nah, Let's Keep It Brutally Retro! 🎮🕹️
#retrochallenge #gamerlife #indiegames #gamingfrustration #metroidvania #bossfight #doublejump #hardgames #retrostyle #ps5gaming #keymailer #littledroid #StaminaZero
youtube.com/shorts/ZC82O...
I've written about creating a reusable Z80 subroutine to read the NES controller on my #RC2014 computer as part of this year's #RetroChallenge
To test it out, I output the returned value to LEDs.
www.robertprice.co.uk/robblog/rc20...
To test it out, I output the returned value to LEDs.
www.robertprice.co.uk/robblog/rc20...
RC2025 - Part 5 - Writing a reusable Z80 subroutine to read the NES controller - Robert Price
Creating a reusable Z80 assembly language subroutine to read an NES controller. The subroutine is tested by outputing the received byte to LEDs.
www.robertprice.co.uk
October 20, 2025 at 10:20 PM
I've written about creating a reusable Z80 subroutine to read the NES controller on my #RC2014 computer as part of this year's #RetroChallenge
To test it out, I output the returned value to LEDs.
www.robertprice.co.uk/robblog/rc20...
To test it out, I output the returned value to LEDs.
www.robertprice.co.uk/robblog/rc20...
📺 YouTube: youtube.com/@LunisCantina
📱 TikTok: tiktok.com/@twinchanter
🔵 Discord: discord.gg/ukDbURgH
#Pokemon #Nuzlocke #FireRed #GamingCommunity #RetroChallenge
📱 TikTok: tiktok.com/@twinchanter
🔵 Discord: discord.gg/ukDbURgH
#Pokemon #Nuzlocke #FireRed #GamingCommunity #RetroChallenge
Lunis Cantina
youtube.com
June 13, 2025 at 1:46 AM
📺 YouTube: youtube.com/@LunisCantina
📱 TikTok: tiktok.com/@twinchanter
🔵 Discord: discord.gg/ukDbURgH
#Pokemon #Nuzlocke #FireRed #GamingCommunity #RetroChallenge
📱 TikTok: tiktok.com/@twinchanter
🔵 Discord: discord.gg/ukDbURgH
#Pokemon #Nuzlocke #FireRed #GamingCommunity #RetroChallenge
#RetroChallenge #PERQ Confirmed with a snip: my savvy friend was right and the RAM chip for bit 7 for the Z80 was broken. I have a replacement in stock, but it's too late to fire up the noisy desoldering gun. Tomorrow...
September 9, 2024 at 11:29 PM
#RetroChallenge #PERQ Confirmed with a snip: my savvy friend was right and the RAM chip for bit 7 for the Z80 was broken. I have a replacement in stock, but it's too late to fire up the noisy desoldering gun. Tomorrow...
We're kicking off our first Long Play with the intense GBC homebrew, Mount Crymore by Pigeonaut! Watch us climb, risk, and maybe fall trying to conquer the world's deadliest summits.⛰️
youtu.be/z4B2sge2dtw?...
#BrewOtaku #LongPlay #MountCrymore #GBC #Homebrew #ClimbingGame #RetroChallenge
youtu.be/z4B2sge2dtw?...
#BrewOtaku #LongPlay #MountCrymore #GBC #Homebrew #ClimbingGame #RetroChallenge
Mount Crymore (Game Boy Color) (2025) BrewOtaku Longplay
YouTube video by BrewOtaku - The homebrew gaming magazine
youtu.be
November 3, 2025 at 5:44 PM
We're kicking off our first Long Play with the intense GBC homebrew, Mount Crymore by Pigeonaut! Watch us climb, risk, and maybe fall trying to conquer the world's deadliest summits.⛰️
youtu.be/z4B2sge2dtw?...
#BrewOtaku #LongPlay #MountCrymore #GBC #Homebrew #ClimbingGame #RetroChallenge
youtu.be/z4B2sge2dtw?...
#BrewOtaku #LongPlay #MountCrymore #GBC #Homebrew #ClimbingGame #RetroChallenge