Next: "I went mining in a cave and collected resources to make my own hardware"

I’m genuinely impressed. This has to be the most exciting “building an OS” video I’ve ever seen since Terry Davis.

My C programming class in 7th grade had me doing something a lot like the second half of this for our final group project. We just had a pointer to the start of video memory and a few very basic support structures like that, and the rest was up to us. I ended up writing most of the core layer, while the rest of the team implemented game features and made sprites and all that other stuff. I walked out of that class really knowing what programming was about, even if it took me a few more years to get a practical coding environment going for myself. Looking back, that teacher was one of the best I've ever had, in any subject. He was a huge follower of the socratic method, never handing us answers, but getting us to come up with them ourselves, or find them in documentation, while never letting us get mired in a dead end.

This video inspired me to start writing my own OS. As I’ve been writing I’ve been rewatching this and understanding more and more. I *just* started having this weird behavior and was like, “I bet I didn’t read enough sectors in.” Yup, that was it! Thank you for saving me a LOT of pain!!! 😁

"Bro, your computer is so slow, what OS is it using? Vista?" "Tetris." "...Huh?" "My computer is running on Tetris."

Fun fact: GIMP can export images as C code for situations like these.

Me: - Let me check the code. Github: - Repository unavailable due to DMCA takedown.

Idea: You _can_ run applications, but to launch them you have to clear lines that correspond to positions on the taskbar

"Hey bro can I borrow your laptop really quick?" "Yeah sure it's on the couch" "Thanks" tetris theme starts playing from the living room

When he said: "So the cool thing is that it works for now and will only break when I’m about 20 more hours into this project and have completely forgotten about this code." I felt that....

This video never gets old! 2 days ago I finally got my bootloader to load and run my 32-bit C kernel and today, I got it printing to the screen properly. I have a long way to go and hopefully, I'll have my own version of Tetris running as well in the future!

I am truly impressed by this. I'm currently learning more and more code as the days go by (at least it feels that way). And seeing something like this really does make me motivated to keep pushing. I guess I gotta start doing some leetcode first though, to at least get those concepts in. (Mainly been doing webdev until now, so backend is kind of a new field for me)

Just imagine the Tetris bootloader where you have to beat level 100 levels of Tetris to boot into your main OS.

Teach me your ways. You built everything from scratch, even the Tetris soundtrack lol. Next you'll be writing your own BIOS on custom made hardware.

You are a brilliant and consistent man, I thought of creating a simple OS myself back in days when I was obsessed with writing things from scratch but couldn't do it because it is so much work and requires you to understand a whole lot than a normal programmer understands about computers. Your video gives the gist of what it needs to even write a very simple bootable software. Love your work man and thanks for sharing the Github code as it may help someone who is as cool as you.

From my very limited experience from writing memory manager for Nova (had to do it for uni) and some assembly (also for.uni) I admire how persistent you had to be to one man this. Had to take so much effort. Very cool

Next Video: "I realized that using an operating system to make tetris is sort of cheating, so I made my own computer without buying any of those cheaty parts and hardcoded tetris into it."

Code Bullet : Makes the game and then makes the AI jdh : Makes the OS and then makes the Game

Holly man... Outstanding skills! Respect for the effort and also result!!!

I really appreciate the way you kept spacing the code when it was a bunch of variables

"yeah i was bored so I made tetris" "oh that's nice" "yeah, but writing the filesystem was a pain in the ass"

I'm sad that you didn't take the genius opportunity to name it "TetrOS"

I am so mind blown by your videos. I have been watching them all day at work. How did you even manage to get to this point? I am about a year into my programming career and this just feels beyond my lifetime

This video earned you a sub from me. I have been playing with the idea of building an OS that runs only one piece of software (I have my reasons), and your Github may just provide me with the inspiration to go through with it.

OS: "what is my purpose?" jdh: "you load Tetris" OS: "Oh my god!" jdh: "Yes!"

jdh: _Builds an entire OS from scratch just to play tetris_ Me: _opens Stackoverflow:_ *How to center a div in CSS*

20:49 "It was at this moment that he knew He fucked up" Seriously that's a huge pain for tetris enthusiast 😂

I binge you’re youtube videos while coding, i love you’re content man keep up the good work 👍

“Some people use cheats like a prebuilt universe but I don’t need any of that stuff”-Jdh 40567

Well, can we just appreciate, that you did such a good job that Tetris Holding, LLC issued a DMCA takedown, good job

Beautiful. I wrote an OS for fun too (back in the early 2000s). It had a bootloader, never left Real Mode, and could display a command prompt, and that was it! I was incredibly happy when I put the image onto a 3.5" floppy and it actually booted on my machine (modern machines with UEFI instead of a BIOS would have been much harder). Then I proceeded to never look at it again and question my life choices.

Awesome nostalgic video! It reminded me what I build in my ~13-15, my own OS just not with Tetris but simple shell.

Not only did he make the os and tetris, but he busted out the keyboard and figured out the harmony and melody instead of just checking musescore

I like how he figures out the music to tetris by playing and listening instead of just looking it up

This is similar to what we did for my 400-level computer architecture class. Only the system we were writing it for was based on a Motorola 68K chip. We had to write all the low-level hardware drivers and a simple OS kernel that tied it all together. The final involved booting it up and loading a program from a floppy disc that the professor gave us (yeah, we implemented a floppy controller driver). The program utilized every feature we had implemented to date to run a very simple (ascii) version of Tetris.

"Repository unavailable due to DMCA takedown."

i didn't understand a word he said in this entire 20 minutes but i loved every second of it

Next up: A collaboration with Ben Eater, because you two are basically going the same path just in opposite directions.

The world needs more of this guy, who still can write assembly

Thank you for the video, This actually gave me lot of an Inspiration to make my old laptop old game machine ! Love u dude !!! ...

your channel is so underappreciated, I have been watching since your first video and don't understand why your channel hasn't blown up yet. great video production quality, informative and just the right amount of humour. wait until the algorithm gods decide it's your time and your channel will blow up in no time.

Dammn man, your github repository got actually DMCA'ed, this is insane

Github code repo is gone, just checked and thanks for the video. I can't draw with a pencil, let alone with the code. Your dedication and passion can't be matched. I never ever thought that I'd see an OS, from scratch, running an enterprise workload called "Tetris"

You fixing the rotation table made me actually happy to see

As a hobby OSdev I can say this is highly based, good job.

Can't believe there's someone out there who's still paying for a domain hosting niche documentation on 90's hardware.

17:54 nice music i love it

I don’t deserve a video this good, thanks. Great job.

This man is the kind of person who can flex on us but using the entertaining way

I struggle to wrap my mind around how this is even humanly possible, man I'd spend months trying to create Tetris in Unity and this guy casually writes it in ANSI C while casually making a working bootloader, graphics driver, sound driver and all the rest of it

This is the most inspiring video I have ever watch in KZfaq…….thnks for the effort…

Its a good thing you did not release this 18 days earlier :) - thanks for making the source available

"Look ma, no errors!" That is literally me showing my code to anyone

The Github repository got a DMCA takedown

I learnt Java at uni last year as part of a softdev conversion course but have never looked at C before. I'm amazed how much I understand without ever having written or studied lower level languages. Thanks jdh.

I wish I had your knowledge, so many ideas in my head!

This is the most satisfying programming/game dev/vim/neovim video on youtube, i could watch this all day

"This repository is currently disabled due to a DMCA takedown notice. We have disabled public access to the repository. The notice has been publicly posted. " WHY

That is totally sick you're a good programmer man I really like your videos. 👏👏👍👍

“I’m not trapped in a sub” oh boy that did not age well

When I started coding I thought using libaries was some sort of cheating, as I basically just ran someone else's program which I couldn't write myself. This guy took that thought to a whole nother level

“I don’t think Tim Apple would like me booting this on his hardware.” That’s code for, “I have no idea how to get a Mac to boot something other than MacOS.”

Wow, in awe. Watching and listening to a genius at work.

I just can't believe the fact that the repo got DMCA'd 😑😑

next: "I reprogramed the BIOS of my computer to only run tetris"

As someone with no assembly knowledge, this whole video was a bizarre combination of surreal, confusing and inspiring. I kinda wanna learn assembly now.

I am really impressed but you destroyed my eyes ! I was watching your video at 00:26 and while i was watching i came up to the minute 8:30 in the video and the white bright screen blinded me 😂

9:29 - Aww, tsundere PIT 🥺👉👈

I completely forgot I even subscribed, what a surprise.

This is the person who's going to make those computers you see in Fallout.

You can use group theory to rotate the tetraminos. A rotation is a combination of orthogonal and diagonal reflections.

Damn, this man just says my thoughts out loud and I appreciate it

i only understand Java and C# but this was still extremely interesting, seeing a genius create an operating system

This is literally everything I've ever wanted! 😍

You seem way too smart to be spending your time making this... Good job!

I wish I was this capable! Impressive work!

Dude this guy made an operating system in a month and I can't even figure out data-orineted design in that time. Where did you learn to program? I'm mega jelly about your skills at all things programming.

ah yes, building an OS. i did this for my raspberry pi, wrote a custom OS so that I could make a robot run easier with it, forgot to backup the ISO, and the sd card broke causing me to lose 4 months of work. good times.

This is the pinnacle of KZfaq right there! Aspiring to say the least

This sounds like it could be a fun project for learning the basics of bare metal programming. Time to do this in Rust!

Bro. I'm over here with a case of depression caused by c++ and a project that's taken about 8 hours so far. I could never do what this man just did.

The Next box isn't just for "fancy new versions." It was literally present in the original Electronika 60 version in 1984. That's before the game had sound, color, or even a price tag.

21:06 OMG JDH PREDICTED THE OCEAN GATE SUBMARINE

20:55 nah man literally predicted the future here

One more thing you can add is the Tetris bag randomizer where the seven unique pieces are shuffled and outputted as a group repeatedly. Three T pieces coming out of the first four was surprising. awesome video

As someone who has only really used high level languages this is incredibly fascinating, all your videos are great and I hope the KZfaq algorithm would favour your channel more. Awesome content

Now you gotta put it on a raspberry Pi and put that in a Tiger Handheld from the early 90’s and you’ll be set.

This is so cool! dream to have this knowledge

This project is so needlessly hard and complicated but at the same time so beautiful to watch. Must have felt _so_ satisfying to see through this project after all the pain that went into making it. This I aspire to become as a junior dev.

Ok, so, given the way this goes, the next video he's gonna say "I'm just too good for computers, so I made my own computer and OS, just to run pong"

Put it on a Raspberry Pi, get a custom case and controller, and boom, top notch homemade Tetris machine.

Well it was actually worth the DMCA. Great work dude!

once Ben Eater finish building his bread board computer, you'll need to port this over =D

Where do you even start learning how to do this, this is incredibly impressive.

This man has the dedication to do anything, Nice

damn, your learning so much!

This got you a subscribe from me. I've never seen anyone just write assembly like other people write "normal" code. I used to write assembly on my old BBC and I was constantly having to look everything up all the time.

really impresive. I feel like I only saw a fraction of the hard work, that went into this. great job

I did a few assembly based graphic demos back in the day on the SoundBlaster and vga, but i wasn't that big of a mosaicist to create a basic OS to go with it!

1:33 And not even that will let us start tetris or anything that complex. Never have I emagind to hear tetris is complex. Amazing video LMAO