The Arithmetic Logic Unit - Let's Make a Redstone Computer! #2

[@mattbatwings]

To try everything Brilliant has to offer-free-for a full 30 days, visit brilliant.org/mattbatwings You’ll also get 20% off an annual premium subscription.

yeo

[@KayraBalcı-t2s]

Man I love your videos! I signed up to brilliant today. I hope I would meet with you one day! I started to redstone engineering with you.

[@Diamondsword85_RS]

dudes had the longest sponsorship I've ever seen

@@KayraBalcı-t2s same

[@dimydek6686]

become a teacher in your 40s

[@avarage-programmer]

This series would be great for actual computer architecture classes even if the people don’t play Minecraft

[@mitchratka3661]

Can confirm, am currently taking systems architecture at penn state, though I do play minecraft

[@diggoran]

I actually tried to help a classmate through a Digital Logic Design class by using Minecraft, and unfortunately because they didn't play Minecraft, it just added another layer of complexity. Turns out it's a lot easier to use standard logic gate pictures rather than having to explain how redstone dust interacts with blocks and blocks with torches, things you take for granted when you've already internalized it as "powering a torch turns it off".

[@gabriell.1437]

@@diggoran circuitJS is the GOAT for these sort of things in a pinch. Obv verilog/quartus are too, but that’s a larger commitment than making something in Minecraft, whereas circuitJS is very beginner friendly

[@diggoran]

@@gabriell.1437 in our class we already used logisim, so picking up Minecraft as another simulation engine was entirely unnecessary

[@catdisc5304]

Can also confirm. I'm studying IT/CS at the moment and I'm like "OH SHIT! I KNOW THAT FROM MY CLASSES AND IT ALL MAKES SO MUCH SENSE!" so yeah, there's that

[@RefreshingShamrock]

The way you turned an adder circuit into a complete ALU like that blows my mind. It's unbelieveably compact.

[@gancuber4204]

fr

[@cub3_rubik]

This serie is gonna be so cool

[@xx_petitchat_xx1073]

it is right !

fr

[@NieMamNicku]

yes

[@AcerArtsOfficial]

Bruh im just starting the multiplication portion of his calculator build.. just barely able to comprehend it and then he drops this on us!! Lawdy

[@quakxy_dukx]

Hey fyi, series is both singular and plural (serie is incorrect)

[@CatmanXvZ]

Really happy to see how this series is turning out. I've always been so inspired by matt but I've never really been motivated to fully finish a redstone oriented project. Maybe now I'll attempt to stop spaghetti wiring

[@NieMamNicku]

Good luck

[@LucasBucur]

just edit out the minecraft stuff

[@twistedtim1969]

@10:44 Your description of how logic gates are created by simply moving the inversion point(s) was the clearest explaination I've heard in my 30 year career. The order in which it was presented makes it so easy to remember.

[@tunahanbetin]

I saw your first computer video a year ago. After watching that video, my interest in computer science increased. I looked at computers not only in Minecraft but also in real life. I designed computers a few times and also developed my own assembly language. I am currently trying to build my own computer in real life. You could say that I have taken up computer science as a hobby. I would never have achieved this without that video. Thank you so much, I love your videos ❤

[@ToyFreaksArchive]

I just wanna say man, the way you explain things, and identify every problem, its amazing. Every time I have a question in my head, you answer it shortly after, like you can read my mind. Other people kinda just assume you know how 90% of something works already, which makes it hard to figure out. The way you do things is so introducing, yet still makes professionals not bored. Keep it up man. 🎉🎉🎉

[@leominecraft5031]

Memed explqnation is better than normal (he did it)

[@webing5]

I was taking Engineering 101 when the original Logical Redstone series was being released, and I followed along with your tutorials after class! They lined up with the lecture material surprisingly well! This video was uploaded the first day of my "Computer Organization" class, which will cover the parts of a computer and assembly languages. The first class was about ALUs... there is some sort of very helpful conspiracy afoot...

[@haxihoovis1]

This was made even better because the sponsor was in the end and not interrupting the middle of the video. Great job, Matt!

[@YoussefGamerYT]

So excited for this series, those 6 days felt like 6 weeks!

[@LucasBucur]

true

[@NOTreallyINFERNO]

Bro said let's make a computer like it's an everyday thing, bro was like "another day another computer 🤧"

[@S4ndedude]

Not funny

[@justsomebodyrandom5021]

@@S4ndedudeyou didn’t need to point that out

[@S4ndedude]

​@@justsomebodyrandom5021not my problem

[@raskolnikov3799]

​@@S4ndedude It has been democratically decided that you're wrong.

[@atom1kcreeper605]

... It is tho

[@YellowBunny]

Another important feature that ALUs often have is flags for branching logic, such as for example a 0 flag for comparisons and a carry (out) flag.

[@angeldude101]

Often, but not always. You can absolutely make a CPU that has separate a dedicated comparator separate from the ALU. It's hard to get away with this though when you have limited instruction space.

[@_marshP]

@@angeldude101 I always just lumped in the comparator as a part of the ALU.

[@hyper_lynx]

The block diagram of this machine has a flags register so I'm confident it will come up at some point.

[@PheonixWrong0]

IT'S FINALLY HERE!

[@zombiechameleon614]

This man is an absolute legend, he needs to show up when i search up minecraft redstone, youre the best redstone youtuber, you deserve a million, yet youre somehow only a 5th of the way there

[@benndude2554]

I though LRR was the best redstone series on KZbin, but then you started this one LOL thanks for your invaluable service to the redstone community

[@Kilming]

The best thing is that this will inspire a lot of people to study computer science.

[@vifgaming]

Brilliant! ... get it because the What can you do to add 3 numbers together without re-feeding the inputs on that CCA/RCA?

[@dinosaric4862]

Wow I never thought I could use an adder for bitwise logic. Thanks I will be using this in my logic world cpu!! 💪

[@FriedMonkey362]

Man i was disappointed When the video ended, cant wait for the next episode

[@Gabriel-rg7cy]

Can we just take a minute to appreciate just how amazing mattbatt is?

[@undersunbit]

very exciting for the next video! i wanna build my own computer and code my own emulator . please don't die or give up this series

[@BrightC1d3]

I hope he doesn’t it has been 9 days and it is starting to feel like he quit but I’m sure he won’t

[@undersunbit]

@@BrightC1d3 dont worry, the next video is coming out next Saturday and he plans to post 2 videos per month of the series and some another stuff between them

[@SubatomicPlanets]

YES! I waited all week for this!

[@holophs]

Its been few years since I've completed computer architecture in university and I still look at his videos because its that much interesting

[@xPlay5r]

And just like that, he described how to do a full functioning calculator with 10 minutes! What a legend

[@kaiperdaens7670]

YEEEY I waited so unpatiently for the next video in the series.

[@Katokoda]

That's so good! I really appreciate the nice explaination with only two (three) bits implementing all the operations which allows to easliy understand how you have done it for the whole byte

[@aradziv89]

man... I already know that this series will not get a lot of views. Which is a shame, considering how well done it is. Do you plan to continue the series regardless of the views? Edit: If the series keeps getting sponsored, that's great! I don't know brilliant's criteria for sponsoring a video though.

[@trCore]

Definitely, not everything has to be about views.

[@aradziv89]

@@trCore I wish I could agree but views = money and if he can't monetize his channel, he'd be forced to stop the series

[@Conofive]

@@aradziv89 he is sponsored by brilliant for every video though

[@NieMamNicku]

brilliant sponsors him so he makes this series regardless of views

[@mattboemer4549]

@@Conofivebrilliant sponsors him BECAUSE he gets views. If you have no/little audience, advertisers don’t like you as much, and might stop sponsoring you. Additionally, the algorithm is going to see that people aren’t liking his videos, except for a small proportion of users, and so when he starts trying to make more interesting content, he might get overlooked by the algorithm. Not saying he’ll stop with the series, but I don’t think having one sponsor is good enough

[@imna2712]

I've been waiting for this mate!!

[@greenguydubstep]

stooop!!! now i need to finish my computer before you release the cu tutorial aaaaaaa

[@codyblayney1354]

Awesome series! can't wait for the next videos!!

[@quickplayzRok]

i cant explain how hyped i am for this

[@spacenoodle8207]

This is way more entertaining and useful than lectures on the same stuff in my uni I actually understand things... Amazing! I'm gonna use this knowledge during exams

[@Byron_Hill]

So excited for this!!!

[@Neko_Necromancer]

Ooh, that's a different CCA design than the one I copied from your video It's super cool how easily you can modify an adder into an ALU

[@simplifyitofficial]

I was Waiting Sooo Much For this VIDEO 😢😢❤❤

[@Daxis1]

Bro literally started cooking with the intro.

[@BranB-e4y]

Loving the series!!

[@mrBrod._.]

I saw Matt, I clicked! I'm so excited for this series!!

[@davejwalker92027]

Another excellent video... you do an great job explaining things in a straightforward and clear manner. Kudos! I've been playing around with your computer off and on for a couple of weeks. Last night, I decided to implement a CORDIC function to calculate sine and cosine (for sh*ts and grins). For those unfamiliar, CORDICs are used in digital logic to calculate sine and cosine (and other things) iteratively with simple adds and shifts vs. using large and expensive look up tables. While writing the code, I came across an ALU limitation regarding the RSH instruction; specifically, it doesn't support arithmetic shifts. This presents a problem for negative values where the sign bit should get shifted into the leftmost position. It would actually be quite easy to add to the ALU I think. The RSH instruction has spare bits that could be used to distinguish between logical and arithmetic shifts and that bit would be used to simply feed the sign bit into the shifter. You might consider adding it. (I might do it myself for fun... only problem is that the emulator doesn't support it and the source code isn't available.) Once again... awesome job. Looking forward to the rest of the series.

[@Realduokidsfan]

YES FINALLY!

[@origami6]

This series is gonna be so amazing and It's nice to know how this stuff works.

[@choonyongtan5671]

Thanks for always making quality videos!

[@rainbowbro3186]

Did a better job explaining this than my professor

[@kylebowles9820]

This is sick, you should totally continue this

[@jossepililugo9476]

NEW MATT DROP 🔥🔥🔥

[@TheCloneAcc]

This series contain a comprehensive computer architecture course which is way better than most that i can find 😂

[@TurkeyBoy2010]

13:38 I reverse engineered this cca and it is so impressive. I think its the simplest and easiest to understand cca i've ever seen

[@MechaDino51]

I also looked at it and tried to rebuild it but there are some problems can you explain some details on the CCA that I might not have on my recreation?

[@TurkeyBoy2010]

@MechaDino51 there's a world download if you want to troubleshoot it, but I'd look for a missing column of torches somewhere and make sure all the comparators are set to subtract mode so that the xor gates work

[@undersunbit]

yeaaaaa, i was very excited to see the next video

[@devanburke4808]

This is an incredible project to undertake and an incredible series!

[@rodrigoqteixeira]

Oh damn, I really was never gonna expect flood carry.

[@hoanphung8511]

Finally i waited soo long for this episode

[@kriz9960]

This dude is tricking us into learning assembly and computer architecture

[@tomiivaswort6921]

finally. the continuation. I'm really excited for this

[@FinnFaherty-st3ds]

Love the series keep it up

[@prabhanjana1139]

Thank you very much for this series

[@TylerAkerboom]

Best vid so far very helpful I can feel success near

[@J-Playz1234]

What i would like is a tutorial on how to build this as well as an explanation for how it works

[@entityredstoneonyt]

thanks. this is much better than my last alu, where i just wrap the operations around my adder/subtractor

[@godsepicgamer3825]

ok so there is a vr game i play called yeeps hide and seek and it just got its "Redstone" kind of update, so ive been watching your videos again to be the first one to make a computer XD it uses blocks too but its also alot different

[@haileywright04]

Been waiting for episode two!

[@alsama198]

Right when i am working on branching on my own cpu. Thank you for the video

[@javierchust1618]

Now @RubikYT has started a technical redstone series partialy because of you, so thank you very much.

[@mendelberrebi]

yay more mattbatwing video pls do hex tutorial

[@Damien-d9f]

10:57 is honestly a great representation of De Morgan's law

[@JudeHogue-rq1gc]

Excited for the series🙃😁

[@thomasmeslin8399]

Very cool and well explained

[@ImOnFish]

5:50 i noticed that u turn off the ouput of the towers not the Input. this results in every tower computing the operation evn tho it isn't used which can lead to performance issues ^^

[@TirzaBoi]

Now i made an ALU by myself! Tho i had to split it in two parts, where the other does + - XOR XNOR, and the other does OR NOR AND NAND due to the way i did it.

[@codemeepmew7029]

Awesome !!! I want more and in detail !! :0

[@NK-61]

YESSSSS MATBAT ALU VIDEO

[@Sand.]

amazing video as always

[@andre_601]

Random question for 7:40: Wouldn't it be a bit simpler (Especially visually) to utilize comparitors for the XOR functionality here? Because in case people don't know: Placing two comparitors next to each other in subtract mode and then have inputs A and be to to left+bottom-left and right+bottom-right respectively would create an XOR. Here's a sort of schema to represent it visually: _OO_ RCCR ARRB _ = nothing O = Output R = Redstone dust C = Comparitor (Subtract mode) A/B = Inputs

[@ThatOneCodeGuy_MC]

yo new series omg im gona watch it 4 quatripleobillion tmes before i re-learn redstone

[@xenny5435]

Изучил всю механику редстоуна по твои гайдам

[@cornwithbutter]

make a machine that takes two binary numbers as input and outputs a MattBatWings face reveal

[@BrightC1d3]

He already showed his face

[@JunxiSalamander]

I camped the night for this!

[@novantha1]

I don't know if this is up your alley or not, but would you at all be interested in producing a block floating point computation of some description? It's recently become a pretty relevant idea (a lot of fast fourier transformrs use it, as do many modern AI accelerators like NPUs and ASICs have native support for the format), but there's not really a ton of documentation about how it actually works as industry applications are still relatively new.

[@Xa31er]

Thank you for this series🙏🙏. i would have liked it to be a von neumman architecture but... I mean I understand that it is more complex and maybe not a good place to start. TL;DR : Love the vids, keep it up!

[@octopuszombie8744]

I'd be happy to see the part with the stack pointer and how it works - because I have no clue about why it is added with a stack base pointer and an offset and what the purpose of adding 3 numbers to generate an address

[@calebdouglas3262]

keep doing what you do! youre awesome!

[@Diamondsword85_RS]

2:40 in actual assembly, it would say add r3, r1, r2

[@mage3690]

That's Intel syntax, AT&T syntax would be "add %r1, %r2, %r3". Since he's literally creating his own computer, it can be whatever he wants, in whatever order he wants. In modern x86 ASM (Intel syntax) it would likely be "add eax, edx" where the contents of eax are overwritten with the result. This is done because it leads to a more compact instruction for one of the most common instructions that the CPU will ever perform and therefore saves memory, but mattbatwings is going to go with the three argument add instruction because it's much easier to debug the literal hardware if/when he puts a component in the wrong spot/facing the wrong way, and it's easier to reason about the timings when you don't have to worry about overwriting your input data. Now, I happen to prefer Intel syntax myself, all those percent symbols in AT&T syntax give me anxiety, but that's a whole other thing.

[@oxygen2623]

Assembly/assembler is somewhat customizable. And it's different for each programming language

[@mage3690]

@@oxygen2623 oh yeah, if you're writing your own assembler, you can basically do whatever you want to the argument order, can't forget about that. It's really easy to forget that assembly is more of an abstraction over the actual bits than it's often explained as.

[@Faresfris]

Cool video mattbatwings

[@andersonalexsandrosoaresda557]

please dont die or give it up. I really want to learn everything and build my own

[@ThatGuyNamedBender]

I have experience in low level computing as well as extensive knowledge in binary and binary operations but my brain can hardly follow its redstone implementation 😂 love the video still, great job man I will continue to follow the series as it's very interesting

[@BlueWithaFruit]

There’s a great Roblox game called circuit maker 2 and its an amazing circuit playground using logic gates

[@suryakamalnd9888]

Ye finally!!

[@RinnoaMika1]

Following along and trying to make my own. Wish me luck :)

[@ChessGame-g5y]

Thanks for this video. You really helped too many people, and one of them is I. Thanks, Matt, for your good content and good luck! You are strong, we know it. Sorry for you lose 😔

[@ThatJay283]

for the alu registers (my alu has 16 bytes of dual read memory) one thing i did (because dealing with 3 bus lines with 2 blocks height per bit is hard) was i cheated abit and gave it 32 bytes of regular memory in a 16x2 grid but with the write lines tied for each row

[@etwasahnung]

i was waiting for this!!!!!!!!!!!!!!!!!

[@PieceOfMulch]

Yo, could someone help me out. I made the adder correctly and it was synced, but once I turned it into an ALU it wasn’t synced anymore.

[@theotimeyt]

Researching this to try and make a DesMos CPU

[@PyroAxolotlDragon]

I always thought that an ALU was some mysterious thing with a very fancy name that was hard to understand, but no it is just a single thing that does many operations on inputs

[@The5DimensionalTesseract]

Hey Matt, even though you’re gonna make a block by block tutorial, I’m still gonna try to make this! Wish me good luck!

[@martinplayzrob_lox]

13:50 that cca looks fairly new… can you make a video on that?

[@VARZ-EDITZ]

He should

[@ThatJay283]

ive built 2 minecraft computers before, first one was horizontal bit layout and no microcode (just one area that was a mess of control lines everywhere and a massive line of repeaters. my 2nd was a vertical bit layout, with a height of 7 blocks per bit, and use of walls with observers and copper bulbs to send signals instantly down. now im challenging myself to build it but 2 tall per bit, and using pure redstone components only (basically whatever is supported by MCHPRS, which is very limited, and is also consistent with the redstone components you use). also dealing with 3 bus lines for the ALU is difficult, but im considering another option that involves locking repeaters for each section and doing things with comparators so i can send the output through the input line without messing up the input data.

[@swotiix3993]

niceee i need more bro

[@RobRed1011]

After such a long time i finally made My Own ALU it's a bit big but its acceptably fast not 3 ticks like 8 or 9 ticks but it was on my own the only thibg that helped me was mattbatwings and some guy who made a tutorial on how to make the cca

[@Ospree]

What happens when you do 8+8 on the 4 bit adder? Doesn’t it just break and display 0 because there is no redstone lamp connected to the final carry?

[@sssamson1768]

Yes! That is what we call an ‘overflow error’ and is actually how the subtractor works!