Andrew (LinuxJedi) Hutchings
@linuxjedi.co.uk
https://linuxjedi.co.uk
Embedded Software Engineer at @wolfssl.bsky.social. Open source software advocate. Restores and designs vintage/retro Acorn & Amiga hardware (https://retrosupplies.co.uk).
Married to @appleyardcandles.bsky.social.
Embedded Software Engineer at @wolfssl.bsky.social. Open source software advocate. Restores and designs vintage/retro Acorn & Amiga hardware (https://retrosupplies.co.uk).
Married to @appleyardcandles.bsky.social.
Floppy-based MIDI playback, no computer required.
Bringing a faulty Roland SoundBrush SB-55 back into use alongside my SC-55.
linuxjedi.co.uk/reviving-a-r...
Bringing a faulty Roland SoundBrush SB-55 back into use alongside my SC-55.
linuxjedi.co.uk/reviving-a-r...
Reviving a Roland SoundBrush: Floppy MIDI Playback Without the Computer
Back in the 80s and early 90s, when games often came on floppy disks, the music came in MIDI format. If you have never heard of MIDI, this is a standard way for electronic instruments to communicate…
linuxjedi.co.uk
December 31, 2025 at 6:02 PM
Floppy-based MIDI playback, no computer required.
Bringing a faulty Roland SoundBrush SB-55 back into use alongside my SC-55.
linuxjedi.co.uk/reviving-a-r...
Bringing a faulty Roland SoundBrush SB-55 back into use alongside my SC-55.
linuxjedi.co.uk/reviving-a-r...
It seems that some people paid an average of over £80 for the ebook version of my 15 year old book this quarter 😂
December 31, 2025 at 8:45 AM
It seems that some people paid an average of over £80 for the ebook version of my 15 year old book this quarter 😂
A Socket 7 Upgrade: Moving Beyond the 486
From a well-loved 486 DOS build to a K6-2 Socket 7 upgrade, chasing better Quake performance and seeing where the limits really are.
linuxjedi.co.uk/a-socket-7-u...
#RetroComputing #DOS #Quake
From a well-loved 486 DOS build to a K6-2 Socket 7 upgrade, chasing better Quake performance and seeing where the limits really are.
linuxjedi.co.uk/a-socket-7-u...
#RetroComputing #DOS #Quake
A Socket 7 Upgrade: Moving Beyond the 486
A while back I built a 486-based machine to play with some late 80s / early 90s games, as well as try out hardware of the era. I blogged about the process here, with an update here.
linuxjedi.co.uk
December 28, 2025 at 6:28 PM
A Socket 7 Upgrade: Moving Beyond the 486
From a well-loved 486 DOS build to a K6-2 Socket 7 upgrade, chasing better Quake performance and seeing where the limits really are.
linuxjedi.co.uk/a-socket-7-u...
#RetroComputing #DOS #Quake
From a well-loved 486 DOS build to a K6-2 Socket 7 upgrade, chasing better Quake performance and seeing where the limits really are.
linuxjedi.co.uk/a-socket-7-u...
#RetroComputing #DOS #Quake
Preview image from the next blog post I’ve been writing…
December 28, 2025 at 5:37 PM
Preview image from the next blog post I’ve been writing…
The ChatGPT year in review is kinda cute.
December 26, 2025 at 7:51 AM
The ChatGPT year in review is kinda cute.
Hackaday covered one of my blog posts! 🙂
Chip Swap Fixes a Dead Amiga 600
Chip Swap Fixes a Dead Amiga 600
Hackaday Article
hackaday.com
December 19, 2025 at 7:05 AM
Hackaday covered one of my blog posts! 🙂
Sometimes I'm proud of the small things I've done in the past. This is a glowing lightsaber for my LinuxJedi logo I designed into a PCB 4 years ago. It is brighter at the bottom than top (intentionally) and it worked first time. My theory worked perfectly.
December 15, 2025 at 2:06 PM
Sometimes I'm proud of the small things I've done in the past. This is a glowing lightsaber for my LinuxJedi logo I designed into a PCB 4 years ago. It is brighter at the bottom than top (intentionally) and it worked first time. My theory worked perfectly.
Reposted by Andrew (LinuxJedi) Hutchings
I bought it a few years ago, in a broken state - and it was still stupidly expensive, but not obscenely stupidly expensive! 😂
@linuxjedi.co.uk then fixed it for me, and it's now an amazing machine, complete with ZZ9000, which also allows proper HDMI output - which is so cool.
@linuxjedi.co.uk then fixed it for me, and it's now an amazing machine, complete with ZZ9000, which also allows proper HDMI output - which is so cool.
December 11, 2025 at 10:32 AM
I bought it a few years ago, in a broken state - and it was still stupidly expensive, but not obscenely stupidly expensive! 😂
@linuxjedi.co.uk then fixed it for me, and it's now an amazing machine, complete with ZZ9000, which also allows proper HDMI output - which is so cool.
@linuxjedi.co.uk then fixed it for me, and it's now an amazing machine, complete with ZZ9000, which also allows proper HDMI output - which is so cool.
Picked up a faulty #Amiga 600 motherboard for £41 and turned it into a fully working board. Reset issues, bad caps, dead composite output, all fixed.
linuxjedi.co.uk/reviving-an-...
linuxjedi.co.uk/reviving-an-...
Reviving an Amiga 600: From Dead Video to a Clean Boot
I managed to score an Amiga 600 motherboard which was faulty for £41. This weekend I attempted to fix it. Here is my progress. This is what the motherboard looked like when it arrived.
linuxjedi.co.uk
December 7, 2025 at 8:35 AM
Picked up a faulty #Amiga 600 motherboard for £41 and turned it into a fully working board. Reset issues, bad caps, dead composite output, all fixed.
linuxjedi.co.uk/reviving-an-...
linuxjedi.co.uk/reviving-an-...
I recently repaired an A1200 with a tricky hidden fault, only for it to return with even stranger ones.
Broken HSYNC trace, collapsing ceramics, PS/2 mouse weirdness, audio clipping… this board had everything.
linuxjedi.co.uk/the-amiga-12...
Broken HSYNC trace, collapsing ceramics, PS/2 mouse weirdness, audio clipping… this board had everything.
linuxjedi.co.uk/the-amiga-12...
The Amiga 1200 That Fought Back: The Faults I Missed the First Time
I recently repaired an Amiga 1200 with a difficult to find fault. Unfortunately, it came back to me with more unusual faults that I didn’t discover the first time. So, here are the things I missed.
linuxjedi.co.uk
November 28, 2025 at 8:20 PM
I recently repaired an A1200 with a tricky hidden fault, only for it to return with even stranger ones.
Broken HSYNC trace, collapsing ceramics, PS/2 mouse weirdness, audio clipping… this board had everything.
linuxjedi.co.uk/the-amiga-12...
Broken HSYNC trace, collapsing ceramics, PS/2 mouse weirdness, audio clipping… this board had everything.
linuxjedi.co.uk/the-amiga-12...
Posted mostly because @kari.bsky.social said it would be cool to see it, my current soldering setup. JBC T210, T245, PA120 tweezers, DR560 desoldering gun, JT 6040 hot air / tripod vacuum system.
Also, watch Kari's videos if you are into retro stuff and on a soldering journey.
Also, watch Kari's videos if you are into retro stuff and on a soldering journey.
November 20, 2025 at 1:54 PM
Posted mostly because @kari.bsky.social said it would be cool to see it, my current soldering setup. JBC T210, T245, PA120 tweezers, DR560 desoldering gun, JT 6040 hot air / tripod vacuum system.
Also, watch Kari's videos if you are into retro stuff and on a soldering journey.
Also, watch Kari's videos if you are into retro stuff and on a soldering journey.
It seems JBC used my nickname on a package. I can't see it on my account anywhere, but it put a smile on my face 🙂
November 20, 2025 at 1:45 PM
It seems JBC used my nickname on a package. I can't see it on my account anywhere, but it put a smile on my face 🙂
17 years ago I was at MySQL and hacking in useful small UX features in my spare time. Today I’m still doing it for projects I work on.
It is now much easier to see how much of an impact different compiler options have on memory usage as well as performance.
www.wolfssl.com/benchmarking...
It is now much easier to see how much of an impact different compiler options have on memory usage as well as performance.
www.wolfssl.com/benchmarking...
Benchmarking Memory Usage in wolfCrypt Bench: New Heap and Stack Tracking Support - wolfSSL
During a recent industry expo, the wolfSSL team demonstrated the wolfCrypt benchmark and received frequent questions about memory usage, particularly for
www.wolfssl.com
November 19, 2025 at 8:02 PM
17 years ago I was at MySQL and hacking in useful small UX features in my spare time. Today I’m still doing it for projects I work on.
It is now much easier to see how much of an impact different compiler options have on memory usage as well as performance.
www.wolfssl.com/benchmarking...
It is now much easier to see how much of an impact different compiler options have on memory usage as well as performance.
www.wolfssl.com/benchmarking...
Medical Professional: "We usually only see this condition once or twice a year. Typically caused by stress. Are you going through some stress now?"
Me: "Only all the time"
MP: "Yea, you look tired"
Erm... Thanks? 🙂
Me: "Only all the time"
MP: "Yea, you look tired"
Erm... Thanks? 🙂
November 19, 2025 at 3:21 PM
Medical Professional: "We usually only see this condition once or twice a year. Typically caused by stress. Are you going through some stress now?"
Me: "Only all the time"
MP: "Yea, you look tired"
Erm... Thanks? 🙂
Me: "Only all the time"
MP: "Yea, you look tired"
Erm... Thanks? 🙂
“Recap it!” isn’t always the cure.
A badly recapped Amiga 1200 came across my bench, and what I found might surprise you.
Full story: linuxjedi.co.uk/why-recappin...
#Amiga1200 #RetroRepair #Commodore #RetroComputing
A badly recapped Amiga 1200 came across my bench, and what I found might surprise you.
Full story: linuxjedi.co.uk/why-recappin...
#Amiga1200 #RetroRepair #Commodore #RetroComputing
Why Recapping Isn’t Always the Cure: And Amiga 1200 Repair Story
I often see on places such as Facebook that an Amiga owner will show a fault they have with their machine, and the immediate response you’ll see is “recap it”. Now, I’m not saying that recapping isn’t...
linuxjedi.co.uk
November 11, 2025 at 6:45 AM
“Recap it!” isn’t always the cure.
A badly recapped Amiga 1200 came across my bench, and what I found might surprise you.
Full story: linuxjedi.co.uk/why-recappin...
#Amiga1200 #RetroRepair #Commodore #RetroComputing
A badly recapped Amiga 1200 came across my bench, and what I found might surprise you.
Full story: linuxjedi.co.uk/why-recappin...
#Amiga1200 #RetroRepair #Commodore #RetroComputing
I travel with my laptop a lot, and one KDE Plasma feature I’ve always missed is auto-changing time zones.
Turns out it’s already there, just hidden! Here’s how to enable it...
linuxjedi.co.uk/kde-plasma-a...
#KDE #Plasma #LinuxTips #FOSS
Turns out it’s already there, just hidden! Here’s how to enable it...
linuxjedi.co.uk/kde-plasma-a...
#KDE #Plasma #LinuxTips #FOSS
KDE Plasma Automatic Time Zone
I have been a full time KDE Plasma user for quite a while now. Whilst I do not miss much from GNOME, and love the way I can make Plasma my own, there is one niggle that has been missing for a while.
linuxjedi.co.uk
November 8, 2025 at 4:28 PM
I travel with my laptop a lot, and one KDE Plasma feature I’ve always missed is auto-changing time zones.
Turns out it’s already there, just hidden! Here’s how to enable it...
linuxjedi.co.uk/kde-plasma-a...
#KDE #Plasma #LinuxTips #FOSS
Turns out it’s already there, just hidden! Here’s how to enable it...
linuxjedi.co.uk/kde-plasma-a...
#KDE #Plasma #LinuxTips #FOSS
From an idea at Embedded World to a glowing STM32U585 demo board — the story of building the wolfDemo Board for @wolfssl.com 🐺
linuxjedi.co.uk/the-wolfdemo...
linuxjedi.co.uk/the-wolfdemo...
The wolfDemo Board Story: From Idea to Reality
I work building open-source cybersecurity solutions for wolfSSL. These solutions often involve embedded environments, which is why we attended Embedded World in Nuremberg this March.
linuxjedi.co.uk
November 3, 2025 at 7:36 AM
From an idea at Embedded World to a glowing STM32U585 demo board — the story of building the wolfDemo Board for @wolfssl.com 🐺
linuxjedi.co.uk/the-wolfdemo...
linuxjedi.co.uk/the-wolfdemo...
I’ve wanted an original copy of the CDTV version of Xenon II since I got my CDTV. It is extremely rare. I now finally have it!
November 2, 2025 at 9:31 PM
I’ve wanted an original copy of the CDTV version of Xenon II since I got my CDTV. It is extremely rare. I now finally have it!
Something I've been working on in the background this year 🙂
🚀 Introducing wolfDemo — our passion-built board designed to showcase wolfSSL tech at events!
Built with #STM32U585, mikroBUS support, glowing wolfSSL branding, and powerful wolfCrypt demos 🔐✨
Coming soon to a tradeshow near you — come see it in action!
Learn more: www.wolfssl.com/wolf...
Built with #STM32U585, mikroBUS support, glowing wolfSSL branding, and powerful wolfCrypt demos 🔐✨
Coming soon to a tradeshow near you — come see it in action!
Learn more: www.wolfssl.com/wolf...
October 31, 2025 at 10:42 AM
Something I've been working on in the background this year 🙂
An #Amiga 1200 landed on my repair bench that was stuck in a boot loop. DiagROM showed Paula behaving weird. Found the Paula capacitor loose. Can you then see what I spotted was wrong with it afterwards?
So obvious that I wasn’t even looking for it 🤦
So obvious that I wasn’t even looking for it 🤦
October 26, 2025 at 8:00 AM
An #Amiga 1200 landed on my repair bench that was stuck in a boot loop. DiagROM showed Paula behaving weird. Found the Paula capacitor loose. Can you then see what I spotted was wrong with it afterwards?
So obvious that I wasn’t even looking for it 🤦
So obvious that I wasn’t even looking for it 🤦
Over a decade ago, a bunch of us inside OpenStack were teaching people about cloud resilience engineering. Glad to see that today's outages show many didn't listen...
October 20, 2025 at 9:36 AM
Over a decade ago, a bunch of us inside OpenStack were teaching people about cloud resilience engineering. Glad to see that today's outages show many didn't listen...
I guess my bag was ejected 😂
October 6, 2025 at 9:26 AM
I guess my bag was ejected 😂
I have been working on the new version of DoohicKEY for #Amiga 500 computers. Here is a quick (low quality) video demonstrating some of the new features:
www.youtube.com/watch?v=iIqO...
www.youtube.com/watch?v=iIqO...
DoohicKEY v2 Prototype Demo in an Amiga 500 Plus
YouTube video by Andrew Hutchings
www.youtube.com
September 13, 2025 at 11:12 AM
I have been working on the new version of DoohicKEY for #Amiga 500 computers. Here is a quick (low quality) video demonstrating some of the new features:
www.youtube.com/watch?v=iIqO...
www.youtube.com/watch?v=iIqO...
DoohicKEY v2 prototype. Might not look like it, but it has about a dozen new features. It will require a second revision before it is released and there is more firmware still to write for it. But the basics are working.
September 9, 2025 at 1:14 PM
DoohicKEY v2 prototype. Might not look like it, but it has about a dozen new features. It will require a second revision before it is released and there is more firmware still to write for it. But the basics are working.
I built the prototypes for DinKEY 600 and DinKEY 1200 yesterday. Cotton bud for scale.
September 9, 2025 at 12:59 PM
I built the prototypes for DinKEY 600 and DinKEY 1200 yesterday. Cotton bud for scale.