I Made a 32-bit Computer Inside Terraria 

Hey if you're interested in more engineering/Terraria projects like this please subscribe! I wasn't originally planning on making more but there clearly seems to be an audience. My current project is making a foosball playing robot, if that sounds cool then you're in the right place: twitter.com/from_scratch_yt/status/1734116135384363291

I'm a senior software engineer AND embedded electronics designer with 9 years of industry experience, as well as a relevant degree from university. I understood every single thing you did here, even the things you just mentioned in passing, and yet I am absolutely blown away by the fact that you did it. Like.... HOW OLD ARE YOU? And then you edited it all into an entertaining video as well.... My man, you will have ZERO problems finding a job. You can basically just point at where you'd like to work and they'd THROW money at you.

This is ultra impressive. Not only did you plan this whole project, made a very succinct video on it, made your own terraria optimisation mod, you stuck to it all and finished it! As somebody who is currently doing his master in computer science, your dedication and skills are top notch. I am trully mind blown

YES!!!! Hats off to you, All hats, right off. I am a Sr Electrical engineer, and I got here without a degree because I spent 15 years hyper-focused on projects like this while working construction to pay the bills; burning the midnight oil on what I really loved. Architectural engineering, mechanical engineering, computer science, and primarily electrical engineering, building every crazy invention that came into my head, never knowing I could turn my passion into a career. My biggest issue for years was building the courage to display my efforts (you have no problem there), but when I did, my career skyrocketed. Because of people like you sharing your work, I learned how to be confident in presenting and promoting myself. You have an extreme talent, but more than that, you can communicate and present engagingly and interestingly. You have no limitations man! I am humbled and inspired by what you have done here! Keep following your interests and passions, and keep sharing! Thank you.

Senior Devops Engineer here with 10 years working IT, definitively interested in seeing more detailed video essays like these. You remind me of myself at your age just must smarter :D Really impressive work you've done here, couldn't believe it when you went on saying you'd rewrote the entire wiring system lmfao. Keep it up kid

He's going to pull up to a job interview, and put "made a 32 bit computer in a block game" on his resume. What a legend.

Ok but two questions. 1: Can it run Bad Apple 2: Will you make it run Doom?

As a 4th Year Computer Engineer Student building a 16-bit computer using an FPGA to run a crude version of Doodle Jump I am speechless. This is one of the coolest projects I have ever seen and I can only imagine the difficulty especially when limited by the logic gates. I was impressed from the beginning but blown away when you casually mentioned rewriting the wiring engine. I will probably check out your project and see if I can maybe create something cool with it.

My god what a lot of work there, and you made me understand it perfectly. Subbed can't wait till I see your next endeavor

That initial zoom out from the screen to the wiring had my jaw on the floor. I’ve seen CPUs in Minecraft and they look pretty big, but that reveal was MASSIVE.

Professional Software Engineer here - holy sh** great work! Very impressive and fun to watch.

OMG, as a SW-Dev with 25 years of experience, I can't stress enough how insanely impressive this project is !

Dude, I am a Computer Engineer and I am totally blown out by your work. What you did here is worth a ressearch paper. Congratulations.

Hands down the greatest technical achievement ever done in the history of this game. Hats off to you sir, mad respect!

This is an amazing achievement! WOW! You are absolutely brilliant, I hope you post more in the future!

This is beautiful. I’m a Senior Software Developer like many of the other comments here, remember exploring things like this in Minecraft years ago but nowhere near this advanced. Great job! 😎

Kids these days are superhuman, I swear. Combining deep technical knowledge, perseverance and perfect presentation while concealing all the effort besides implementing the computer, all for your presumably first video (likely not, please tell us it's not) is an insane feat. Kudos!

Honestly the bit where you made an entire mod overhauling the game's entire wiring system is possibly the part I'm most impressed by. That's dedication right there.

I have assembled a 16-bit processor inside a modelling software once, so I understand what you are talking about, but this was so much more work to rewrite a part of the game and setup everything around this. Mad respect.

Superbe video! I’d be delighted if you made a video to explain more thoroughly how you used these states gates to make all the CPU parts, and even other things that you had to do to make it work. That’s really impressive, and I think I don’t even realise how much it is!

As a mechanical engineer I am blown away by the dedication you put into this. I don't understand half of it but I can clearly see the genius behind a project like this.

Make sure to add this to your resume. This is seriously impressive.

This video has been sitting in my Water Later for a while. It was definitely worth getting around to. Very good video.

So crazy, absolutely incredible! I don’t understand but I have so much respect for this. You’re a genius!

I already commented in the reddit thread, but I'll repeat myself here: This is _seriously_ impressive. I started PC programming in 1982, so on a 4.77 Mhz CPU capable of about 1 instruction/us. Your emulated CPU is only a few orders of magnitude slower than what we had then!

Back when I was designing video games (90s) we would interview programmers. Sometimes we would just tell them to go off and program pong. This would tell us a lot about the programmer, both in what they did, if they did it, their aesthetic sense, and a lot of other stuff about the applicant. We would have shaken our heads and probably hired you on the spot if you came back with that one.

Just from a single video, it's so clear you're gonna go on to do great things! This project is genuinely amazing, and the infodumps along the way were super interesting too!

I’d love to see follow up videos on more of the details. This is super cool

As someone who knows nothing about programming, but watches a lot of these types of videos, you did an excellent job at breaking the process down into an interesting and easy to understand step by step, far better than any other video ive seen like this

If you read this, please share this video! Such nerdy work must not go unnoticed. Somebody make this guy an engineer!

Seeing shit like this made by geniuses like you is why I quit software engineering to become a lawyer. I can't even begin to express how impressive this is.

As a college student taking computer architecture this semester, this was super cool to watch! Great job man

This is amazing, man, nicely done, truly

This is incredible. 15 minutes of unique phd level content. Please continue posting naturally and organically

not only did you create a whole computer, you also created a revolutionary mod to help your project. wow

Mindblowing ! Great concept and great video !

this is crazy! You are actually insane! This is one of the most impressive things I have ever seen anyone do in a video game

I'm a senior software engineer with 12 years of industry experience and a degree in compsci. Still watching this video was incredibly humbling and impressive. I bet the journey was as incredible as the final result.

I’ve never even seen or heard of anything close to this in Terraria. The amount of dedication this stuff seems to take is absolutely insane.

My god man this might be one of the most impressive things I have ever seen in my 34 years. Absolutely mind blowing how smart you are man. Like, commented, subbed and shared.

Everything this young man has done is the same kind of ambition I've had for the past 20-25 years. I started off in C++ for building a 3D Game Engine from scratch. After a few iterations of that, I then got into trying my hand at Hardware Emulation. I worked on an NES 6502 CPU/PPU/APU hardware emulator in C/C++. While doing my research into this I came across Ben Eater's RU-vid series on building an 8-Bit Breadboard CPU. While following his series I searched for a circuit simulator program to build his design and I came across Logisim. I then implemented Ben Eater's CPU within Logisim. When I did this project, I refrained from using many of the built ins. I didn't use their built in registers to make a register file, no. I used my own registers built with the programs basic logic gates. I didn't go as far as building it from discrete transistors, but I did do it using only basic logic gates and muxes. I even showed the entire bus and used LED lights in the same fashion as Ben did. I also didn't use the built in 7 Segments, I implemented his logic. When it came to writing the binary microcode for the control logic that he programmed or flashed his EPROM with, I had to write a similar program to his within C++ instead of the C like language - library for an Arduino that he used. I mention this because of two main reasons: 1. I understand all that this young man has done as it's in line with the very same thing that I'm intrigued by. Watching a video that he produced of what he's done to build his architecture within an actual game is very impressive to say the least; especially when that's not the primary goal of the game. Yet to see that it can be done and to prove that the game itself is Turing Complete is truly an amazing accomplishment. I've built a working CPU in a game where the game itself is about making one. I built one in a Steam Game called Turing Complete. I know what it takes. It takes a lot of time and dedication. The amount of work is not insignificant. Impressive! 2. The fact that he even built his own mod for the game that changes the game's internal mechanics to improve its efficiency in order to remove the main bottleneck to make his CPU run at a decent rate is impressive in of itself. And his ability to go and do just that: "Make Your Own Tools" to get done what needs to be done shows great ambition and integrity. This is a testament of his determination. Outstanding! If I was to ever put a team together I wouldn't hesitate to have this young man on that team. I'd have him alongside with Ben Eater, 3 Blue One Brown, javidx9, The Cherno, Jason Turner, Bisqwit, Jonathan Blow, the person who built the music video Sandstorm in Factorio, and a few others. This would be the kind of talent I'd be looking for.

Dude I about fell out of my chair when you dropped the containerized CI pipeline. There are so many impressive things about this project, but that attention to detail (and respect for maintenance and tooling) is absolutely next level. Well done!

I've been programming professionally for 6 years and this is cooler than anything I've ever made. I LOVE that you made a whole-ass mod just to facilitate development of the main project. Now that's committent!

Fantastic work mate, bravo.

Amazing! You have a very bright future ahead of you and you are very bright in the here and now. enjoy it.

For validity; I'm a full time developer for more then 20 year. Your computer skills, dedication and presentation skills are suuuuuper impressive! This project alone will surely land you a job at any tech company you want. Personally I hope you choose your own path and write your own projects because you seem really good at it. Best of luck, well done!

There are few people that can actually do this. There are even fewer people who would do this. And only one person who actually did this. This touches skills on so many levels of difficulty and perseverance... This is nerd transcendence that requires Kardashev scaling to appreciate and understand. I salute you!

You are a legend. I’m 35, have been in the industry for 13 years and I’ve never seen such a diverse set of expertise, understanding and knowledge applied so creatively and brilliantly from someone so young. And to top it all off, your communication and verbal skills haven’t been sacrificed. Well done man

Such an amazing video. Great work.

This is by far the best terraria video I have ever watched, insane accomplishment, I knew people could make games inside of other games but the work that you put into this is unreal. Congrats and good luck making mini-terraria!

Hey man. I'm a software dev, and this is hella impressive. I would love to see a more technical video. Keep it up man, you're pretty incredible!

incredible - go on! you might reach the next level of technical development in your lifetime =) Hats off

It is an understatement to say well done! I understand computer system architecture and digital logic. It's a big thing just to undertstand all of that. Not to mention at a level you can use it to create a virtual computer. But to do it in a game, is a wondeful application of all that knowledge. Great video! Good luck with everything. You will find it easy getting a job! If you dont have one already!

Comp sci student here, this is absolutely incredible! Relogic is missing out if they dont pay you to bring your wiring optimisations to the base game

I don't even play Terraria, but as a novice programmer, this is impressive.

Thats marvelous! Thanks for an educating and ispiring content!

This is fascinating and I'm glad the world has people like you in it.

as a terraria vet with 2900 hours, this is the most glorious thing i have ever seen

This is so insanely impressive, wtf. Would definitely love to watch a detailed breakdown of the more technical side of things!

Hey, I liked the video a lot. Also I really appreciate your choice of music in this video. The classical music sounds very fresh compared to the endless lofi hip-hop tracks or game soundtracks other videos use.

Seeing the world blueprint at the beginning of the video sent me into shock honestly. I’m currently an engineering student and I’m just starting to grasp how monumental of a task this was. Insanely good job!

This project is beyond impressive! The fact you made your own mod to improve the games performance just so you could create this is insane!

1:20 You just pissed us off but we're too amazed by this computer to do anything about it

This video was an instant sub for me. There are very few youtube videos that I watch that make me say, out loud, "this guy is a genius"

Sensacional mano, simplesmente incrível, você tem um futuro brilhante pela frente ❤

I study Computer Engineering in college and I'm impressed. It killed me (in a good way) when you showed that you even made a CI pipeline for the project. Also the fact that you had so much dedication towards the project is really cool! Great work, man. This is plain awesome.

Okay we need an item in the game to celebrate this video and this man. This is freaking incredible!

As soon as you mentioned pipeline compliance checks I immediately made sure I was liked and subbed

amazing stuff dude, literally amazing.

In real-world digital logic, these gates exist! They're called transmission gates. They have applications (mainly multiplexers iirc), but since they don't amplify their output like inverters do, they aren't found on their own.

This guy uploads a first video to his channel, designs a gate for the CPU, engineers and optimizes the algorithm for the CPU, develops a mod to massively speed up the wire mechanics for Terraria, and, most importantly, uses Rust. Your work is marvelous, please keep up the good work!

What an absolute legend! I’m a principal engineer with 15 years of experience, worked on a bunch of low level stuff and I got to say that I loved everything about this. Well done dude! This is on par with the crazy stuff tom7 does! Absolutely incredible!

I am so impressed by this. Not only did you make a computer which can only execute a single task, you made a PROGRAMMABLE computer. As someone who is nearly done with getting their degree in computer science I can say that this was such a cool project. And that is without even mentioning everything surrounding that like mod making, video editing and more. My hat is off to you!

A technical video would be interesting. You may be alone in the centre of that Venn diagram (I don't care much about devops) but embedded rust and computing in games is always interesting. I did some smaller scale stuff in Minecraft back in the days.

I used to think Terraria was solely a 2D building and fighting game. It's incredibly exciting to witness the remarkable creativity you've poured into crafting something this extraordinary! Please continue your fantastic work.

You are a absolute beast. I just subscribed for more quality content

This is the craziest project i've ever seen, and i've seen some really crazy projects!

🤯 Not only the project is really impressive! That alone is already enough, but you also did all the polishing and even modified the game it self to get it running faster. And you drove it home with a really good product video. The way you explained the cpu is understandable for everyone! Just 🤯

But can it run doom?

great achivement bro nice job

I am so thankful there are people as smart and talented as you in the world! Best of luck with all your future inventions.

I got my bachelors of science in computer and system’s engineering, and I don’t think I could pull this off. Truly impressive!

i would love to see the technical breakdown!

this is amazing, congrats!

This is incredible. Please become one of those people that creates incredible things the benefit the world. You've got the sheer brilliance to do it and all the time in the world to make it happen. I hope I see your face on something world changing in the future.

i remember being blown away by this project when you first showcased it but the quality of this video is equally as impressive, excited for more stuff and or things to be built

This is SOME motivation right there. Wish everyone was motivated like that.

I learnt a lot from this vid. Cheers man.

Bro this is so awesome. People making computers inside of games might be my favorite thing in gaming tbh.

I'm seriously starting to tear up about how wonderful and beautiful this is. You are incredible

One of my favorite games, being used in one of my favorite tech / science fields, to simulate one of my favorite things, with some of my favorite production quality. Amazing.

So cool. You have an insanely bright future ahead of you.

As a factorio player, and a programmer, I absolutely loved this video. You have an extreme amount of dedication and determination. You earned yourself a new subscriber for sure!!

What impresses me the most is the dedication you have to make it a truly complete project, not just a hobby one. RISC-V compliance, the whole dev ops pipeline, regression testing, just simply amazing

Are you planning on making a really in-depth video on how you designed the different components and how everything works? I'd love to learn more!

I would love to see a video going over how your computer works!

This is hands down one of the best videos I've ever seen. The amount of work and detail is just unmatched.

This is incredible. Most people watching this may not recognize how significant this achievement actually is. You have absolutely cemented your place in the programming hall of fame. It’s truly beautiful. And to top it off, your video production is top tier quality. I’ll be following you closely because you are clearly destined for great things.

You r genius ❤ , it is like looking through a mirror repeating itself ;). Plz make detailed vid.

I'm programmer and have so much love about everything about software engineering I can say clearly that this is masterpiece and you'll someone very talent and give the world something very impressive in the future...just keep going bro❤