Making an OS (x86) Chapter 1 - CPU, Assembly, Booting

[@BeepDerpify]

Knowing nothing about OSes, that boot concept made total sense. Always wondered about that. Unfortunately doesn't seem to work when using WSL2 with Ubuntu... Get the error: "Unable to init server: Connection refused"

[@DaedalusCommunity]

I'll look into that; if you find a solution before I do, tell me here :)

[@BeepDerpify]

@@DaedalusCommunity Found it! First, you need to run the commands in the terminal that enable GUI here: wiki.ubuntu.com/WSL#Running_Graphical_Applications Then you need an application that acts as a display server (whatever that is). I used X410 (paid, has a free trial) but was just click and run. Though you have to enable "allow public access" in the settings. Then run the qemu command and a window pops up! Running an OS, inside an OS, inside an OS 😍 I think VcXsrv Windows X Server is free and would also work. I just tried X410 because it was easy.

[@DaedalusCommunity]

@@BeepDerpify great! Happy you found that, pinning your comment :)

[@xrafter]

Don't edit your comment or you will lose the pin

[@yktv_edotty]

@@xrafter ok

[@nightjolt]

Since he called C a high-level language I knew it was a no-joke channel

[@justicer14]

it's the lowest high level language

[@adennis200]

What is a high level language ?

[@monad_tcp]

@@JordanPlayz158 no, that's not vital for the purpose of level of abstraction of the operating system / machine, there's two levels, direct machine code and high level of abstraction code (programming languages).

[@monad_tcp]

@@JordanPlayz158 yes, but there's no formal definition, having GC doesn't make Java more or high or low level, nor does having Virtual Memory (we all take that for granted)

[@gwentarinokripperinolkjdsf683]

@@monad_tcp personally. I consider any language wich does not have an obvious 1 to 1 conversion to machine code to be high level. For instance assembly is basically just machine code macros and could easily be compiled by hand, essentially assembly doesn't describe logic, it describes what bytes to put where. In C the compiler can really do whatever it wants as long as it gets the logic right, so C is high level. Just my 2 cents

[@mihnea-adriantoma4506]

I have been waiting for a series like this for a while.

[@geekume5539]

Wyoos: am I a joke to you?

[@shrirangjoshi6981]

@@geekume5539 Thanks bro

[@oxycada9272]

Awesome, my college was going to teach us assembly language in microprocessor and microcontroller subject, which seemed a bit boring. But after watching your tutorial, now it seems interesting enough to dig deeper.

[@DaedalusCommunity]

This comment makes me feel useful: thanks, you made my day :)

[@pranavdurai]

@@DaedalusCommunity You deserve it! Please keep the ball rolling on this series. Thanks and all the best.

[@cupcook7Live]

@@DaedalusCommunity what did you use to do the commands?

[@tanishislam4953]

Dude hell yes this is the right content we need

[@AbhishekBM]

That moment he calls C a high level language Me: My whole life has been a lie

[@dces4212]

yeah, C is indeed a high level language :D

[@ngogercin]

Well, it is a high level language compared to ASM lol and also it was advertised like that too, when it first came out

[@user-kg5jh2ct4r]

It's high level compared to Assembly

[@TheCzarcastic]

*Screams in JavaScript*

[@firetner3267]

*Screams in Java*

[@monad_tcp]

ax is 'A' e"x"tended, the register A, but extended (with more bits, by having two parts). registers were named just like that, with letters, because naming them with numbers would be confusing, and they were made by engineers, if they were made by mathematicians, you would have greek letters.

[@mystwalker479]

I'm a visual learner and I'm glad this exists

[@r-prime]

kzbin.info/www/bejne/qJnKqHyed5prhqM

[@environmentNow]

I used to write boot sector programs in class when I was bored, I wrote them in Hexadeimal, and counted 510 bytes, and at the end added 55AA, It is really hard, but was really satisfying to get home and see that the looking random numbers to any other person, actually run as an operating system in a Virtual Machine.

[@proxy1035]

on one hand i kinda want to get into OSDev, on the other i know how damn hard it is to make a fully functional OS (not even graphical) that can deal with Files, and load and run programs. but it's just one of those projects i really want to achieve at some point, and even though my target platform is more likely RISC-V or 65CE02/65816 based instead of x86, this series is hopefully still gonna be a great help in understanding the basic concepts of various tasks an OS does.

[@oscwavcommentaccount]

At first line 3 didn't make sense to me, but then I realised what it does and now it makes sense.

[@alenpaul2523]

Instant subscribed . I was searching the web on how to make OS . Please continue making these tutorials.This is pure gold.

[@roxferesr]

Wow, I loved this! Your pace is on point, not too fast that is confusing, not too slow that it gets boring. Looking forward to the next one!

[@jeckWade4]

The quality of this video is really good! It's really easy to understand and the "animation" helps a lot! I have been waiting for a series like this for a while. Keep up the amazing work!

[@26ilhaanfodkar47]

This have been cost losts of time and such a quality explanation. Thank you.

[@dirhi]

This for a when. And a explanation of the quality. You are thank. Yes.

[@thefoundation1052]

I have been wanted to create an os for about 3 years this has helped me out a lot!

[@MohamedRafi-hq1fj]

Found this on reddit on r/programming I wanted to learn something like this for a long time now. Can't wait for the next video!!

[@DaedalusCommunity]

Next video coming next Sunday!

[@vornamenachname6300]

I saw this video on reddit and am glad that I did. really cool series please continue!

[@chrismackay9268]

I’m keen to follow this series, it sounds like an awesome idea. I’m a software engineer too but work on big enterprise systems, and I am not great with low level hardware.

[@nico_qwer1732]

YES! Finally after an hour of trying, I finally was able to install nasm and qemu! I was able to get that booting from hard disk message!!

[@vitalheart9841]

That was the best i just saw about assembly intro and making OS of your own. I was watching these kind of vdos back to back, though they were also good, but as i picked this vdo from recommended list, Awesome !. Simply nailed it. Not only short but to the point and simplified explanation. Well done!

[@peppapigsbasement5530]

I like your words, magic man

[@ahsanahmedbhaila]

I know somewhat about low level systems and this video is the best explanation I've seen

[@12Tsurugi]

Keep this up, will definitely watch the entire serie ^^

[@snxw69420]

I just found a hidden gem of a channel. Incredible videos dude!

[@DaedalusCommunity]

Glad you like them!

[@Satharus]

Thanks for the great video and your effort! A small note that TIMES and DB are not actual x86 processor instructions, but are rather referred to as pseudo-instructions in the NASM documentation. As they are just directives for the NASM assembler, meaning they aren't actual CPU instructions. Other assemblers have different directives too.

[@DaedalusCommunity]

Yep, I said "instructions" for short, although it's definitely not correct. Times simply makes the "action" code appear n times in the binary

[@Satharus]

@@DaedalusCommunity Awesome! Just thought it may be worth noting for anyone unfamiliar with assembly. Anyway, thanks a lot for the video and I am very much looking forward for this series!

[@ls167]

@@Satharus Just to check I am understanding correctly, this means that they only have an effect when the .bin file is being created?

[@Satharus]

@@ls167 It means that they aren't actual computer instructions. The CPU doesn't have an operation code (opcode) for TIMES or DB. These are for developers to tell the assembler that they need, for example, x amount of memory for this "variable" or memory location. It will, in turn, affect the .bin file created.

[@ls167]

@@Satharus thank you, that make sense.

[@nipunparadkar9458]

Didn't even watch the whole video and I'm already interested by the teaching style. Good job mate.

[@edwardbanner1117]

Amazing! This is exactly what I'm looking for. Starting with the absolute basics

[@alamjim6117]

Okay here I am, after watching similar OS making videos, this video is the most clearly explained... WOW!

[@Lucas00Lucas1]

This is awesome, i'll recommend this video to all my fellow CS undergrads.

[@victordelgadodavalos2314]

Awesome video and awesome topic. Looking forward to the next parts!!

[@css2165]

this is the best series i ever wached and is one i most needed

[@ollo4272]

wow, this is amazing! I've been interested in OSDev but I didn't know where to get started. tysm

[@Victor-vc9br]

I remember using your unity orbit tutorials way back, even messaged you on insta bout it. Holy fuck how have your videos improved. Good on you man, keep making vids and you’ll blow up in no time.

[@dces4212]

looking forward for the upcoming parts of the series! thanks for sharing these stuff.

[@crptc5707]

Thank you so much for this excellent tutorial! Been scratching my head for quite a while as I tried to run qemu in vs code's embedded terminal but vga window not popping up, tried on mac terminal and it's working perfectly.

[@Hhvvjy]

Thank you. This has been needed for years.

[@sgt-Badger]

Love you man, searching this tutorial for years....... ♥♥♥

[@DeadSpecimen]

Just randomly found you! Just subscribed for this series. Exited to see more!!!

[@xrafter]

It isn't random it's called youtube algrothim.

[@theoryofbang6886]

Thank. You. This is a video that I have needed for a while

[@guidlin3400]

i learnt more from this than the past year of me trying to figure out whatever the hell assembly does

[@MASSKA]

1:03 incredible, OMG, INSANE

[@DaedalusCommunity]

Mind = Blown.

[@m4xdev]

For those of you on MacOS you can use HomeBrew to install the required utilities: brew install nasm brew install qemu The same commands in the video can be used for the compiling and executing of the assembly. Also very excited for more of these videos!

[@xrafter]

How to install brew ??

[@m4xdev]

@@xrafter this should help you brew.sh/

[@xrafter]

@@m4xdev I have a linux laptop . But i asked because i have also an old macbook . Edit : .i forget to thank you so... Thank you.

[@m4xdev]

@@xrafter No problem I'm glad to help!

[@potatoman1951]

Please don't be one of those youtube guides which die 6 episodes in

[@DaedalusCommunity]

I'll do my very best not to die :) On a serious note, new episodes every Sunday from now on

[@DaedalusCommunity]

(you happened to be more than prophetic.. I'm very sorry. I should have planned better. Meanwhile you should all watch the series I mentioned in the pinned comment, it's a good one. I'll be back as soon as I'll have some free time, which won't be the case for some time I'm afraid.)

[@nasonaso8356]

@@DaedalusCommunity Any hope yet?

[@DaedalusCommunity]

@@nasonaso8356 I'm afraid not, uni courses are taking all my time, and they're making me realize more and more that I need to make some more research about this subject before ever talking about it. I'll take some time to research after the exams in December, and will eventually record something before the second semester begins. Maybe I'll release some other video in the meanwhile, about the theory of programming languages, how to make one, and things I'm more comfortable with. I might as well try and merge the two, making a programming language and using it to program an OS, idk it's just an idea I had right now. Hope you'll be patient, I'll be back stronger than ever P.S. I'll also make sure to record ALL episodes before releasing them.

[@nasonaso8356]

@@DaedalusCommunity Of course! Take your time! Sounds super interesting. I'll be happy to wait

[@joshuahall3622]

I thought I was gonna have to google 100 questions to figure out how to make something out of nothing. But then there is this emerging from the heavens!

[@Waad3n]

Amazing video, amazing content. Can't wait for the next sunday

[@jvankooo]

Finally !! This is amazing !!

[@MrpHDanny]

Finally an opportunity to put my assembly and C knowledge from University to some interesting practical use. Keep it up

[@pcgamingmasterrace1360]

This is such an amazing video!

[@f0gpie]

ive been learning a lot lately about OSs for college. This was a great vido about booting. thanks

[@monxp]

Really good basic assembly tutorial as well!

[@ellie-g9o]

omg this is incredible. amazing work, I'm learning so much already

[@VirusFusion]

A couple months later and this is very great explanation!

[@camelCase-ie5vt]

Thank you for posting this on Reddit, I was looking for a series like this

[@JamesAbela]

This is a fantastic idea! Like everyone else we all hope you follow through!

[@SkyenNovaA]

I'm so thankful for this series, thank you.

[@abhisekashirbad5649]

Thanks a lot, bro. Can't wait for the nxt episode in this series

[@BrettStriker]

I'll gladly subscribe to a patreon to support this series.

[@nicolaszunker4938]

This looks awesome, had fun following the instructions so far!

[@legominimovieproductions]

Its 1:19 in the night, I should sleep but instead I am watching a video about how to write an os... XD

[@hachikothemaster4643]

that is exactly what i do i mean i stayed up till like 3am one night watching Laundry mat videos.... LAUNDRY MAT VIDEOS.... what is wrong with me

[@imismailhan]

Best video ever i see in my entire life.

[@ArcticProxy]

This wouldve been useful for my computer organization lab. Good video!

[@legendguard3888]

Very nice explanation, keep it up! It'll be useful to study about how to develop an OS :D

[@jarredallen3228]

Great content! I'm looking forward to seeing where this goes.

[@StarDoesntUpload]

What a great video dang, you deserve more subs

[@laurenswissels8480]

Very high quality content, keep it up!!!

[@huntabadday2663]

Finally I understand how a disk is bootable

[@jimoshellen]

You just earned a new sub

[@Pickyricky69420]

I liked and subscribed b/c of this video. Good job!

[@ivaldirbatalha5436]

please keep these amazing content, subscribed

[@alexanderk8109]

Bootloader. It is the key of this video, i think. Thanks a lot.

[@TheBuzoTechie]

Late to the party, but I’m excited for the series :)

[@koshyalex8009]

perfect place to start

[@jullyanolino]

Thank you for sharing such useful content!

[@Epic-so3ek]

HOLY SHIT THANK YOU. AFTER ALL THIS FUCKING TIME IT FINALLY FUCKING WORKS. THANK YOUUUUUUUU.

[@salvadorjohndeniel]

High quality content right here

[@AlexeiDimitri]

Well my friend, IBM DOS-Style boot is old and very educational but We use UEFI today, and apart for UEFI function call conventions, is much simpler than the former.

[@mKumaranVeera]

Eagerly waiting for next video 😉

[@jram8961]

Good job man.. keep going 💥💥

[@YukuriuddoHerusaizu]

This seems intresting! I will follow along!

[@philipsynowiec1557]

Great! Exactly what I needed.

[@oShinobu]

I always wanted to make a toy OS but most tutorials are so complicated, this is perfect

[@lowlevelcodingch]

Asm was a high level language too when it replaced writing 0 and 1 into memory, which was high level compared to punch cards, which again was high level to flipping switches. everything is relative

[@lion6135]

awesome !! waiting for the next video

[@shobhitupadhyay4711]

I like is so much I always wanted to create one thanks for a walkthrough

[@brucetungsten5714]

Very informative - THX!

[@nikhilsajwan7411]

Subscribed you explain well I like it

[@DaedalusCommunity]

Thanks! Glad to hear that :)

[@ameusahkmud-dabii7932]

Thank you for your content 🙏

[@evolagenda]

That this series is 7 eps long, has broken my heart.

[@someone-rm8tc]

Simple and great.... Love it ❤️

[@AKASHSOVIS]

Thank you. Keep it going!

[@alosreal]

My brain got fried, destroyed and bluescreened at the same time

[@Andruhass]

Damn good tutorial 👍👍. Make more!

[@youssefizikitn]

MOAR! I need more!

[@DaedalusCommunity]

MoaR content every Sunday :)

[@a_r_u_n7595]

Immediately subscribed!!

[@hamadaag5659]

This is amazing

[@prashanthkumar0]

really well explained!!

[@baronhelmut2701]

I would explain the move operation of the x86nasm differently. mov ax, 10 is the same as "number n = 10" which is actually the reason why x86 does it this way. So you can translate it into math without mental gymnastics. But eventhough math is my forte I vibe much more with the source->destination syntax.

[@paulblinder5729]

my 7th failure this week Haha. So spot on.😄

[@mukeshjain7514]

My qemu say vnc server running on ::1:5900 and I have no idea what to do