100 thoughts on “How Computer Memory Works – Computerphile

  • January 28, 2017 at 6:17 am
    Permalink

    wut

    Reply
  • February 23, 2017 at 8:33 pm
    Permalink

    Hard to follow on the last truth table… what does ' q prime' mean?

    Reply
  • February 26, 2017 at 2:40 am
    Permalink

    my sd card corrupted and all the videos delete so it is possible the video is on memory of computer ? even I don't save I just only play in computer.

    Reply
  • March 5, 2017 at 6:55 pm
    Permalink

    3:07 ….. AND Gate 7402???? it's 7408 and look at his finger, he's pointing at NOR gates…….

    Reply
  • March 11, 2017 at 2:04 am
    Permalink

    What is that board thing he's plugging stuff into called?

    Reply
  • March 21, 2017 at 4:38 am
    Permalink

    it is a flip flop!

    Reply
  • March 22, 2017 at 6:24 pm
    Permalink

    I haven't seen yet a english speaker to say LED not ealidy 😀

    Reply
  • March 26, 2017 at 9:04 pm
    Permalink

    You made an RS flip flop.

    Reply
  • April 9, 2017 at 12:06 pm
    Permalink

    I always feel like I know less after watching these videos

    Reply
  • April 15, 2017 at 7:44 pm
    Permalink

    Does the NAND have a power supply pin?

    Reply
  • April 27, 2017 at 5:49 pm
    Permalink

    I already knew that this is how latches work. It's part of the curriculum for me, but seeing it for real at 8:35 was really cool for me. It's not like I didn't believe it before I saw it but this makes it "more" real. This video didn't exist back when I learned this stuff.

    Reply
  • May 17, 2017 at 10:05 pm
    Permalink

    Uchihas called it IZANAMI

    Reply
  • May 21, 2017 at 4:10 pm
    Permalink

    Thats so clever

    Reply
  • May 29, 2017 at 2:25 am
    Permalink

    Give me all of your Atari computers please. :p lol dang you have so many different kinds of the Atari computer models… I just want to be there!

    Reply
  • June 2, 2017 at 11:13 am
    Permalink

    thank you so much Mr. Steve,
    and this is one of the best demonstration i have ever seen on youtube :)!!!!!!!!!!!!!!!!!!!!!!
    just perfect !!!!!

    Reply
  • June 4, 2017 at 1:52 am
    Permalink

    sorry to say it but whatever device you're using to read this comment is most likely using capacitors as RAM. welcome to the real world

    Reply
  • June 10, 2017 at 6:08 pm
    Permalink

    show me cMOS circuit cmon! 🙂

    Reply
  • June 13, 2017 at 3:55 am
    Permalink

    Can you please tell which book you referred in this video?

    Reply
  • June 22, 2017 at 11:10 am
    Permalink

    CMOS logic is naturally inverting, so don't you mean to say that a NAND gate and NOR gate are implemented directly, whilst the AND gate and the OR gate have an inverter at the end?

    Reply
  • June 23, 2017 at 4:30 am
    Permalink

    This could have been done so much clearer and btw. you explain how static memory works and the ram chip you show at the start use dynamic memory which is working with refreshing charge or no charge on capacitors rather than logical circuits.

    Reply
  • July 5, 2017 at 9:29 pm
    Permalink

    Why creators have forgotten forbidden status when S = 1 and R = 1 ?

    Reply
  • July 12, 2017 at 4:59 pm
    Permalink

    does anybody know which book he uses as a reference to the IC chips?

    Reply
  • July 21, 2017 at 12:48 am
    Permalink

    This video was hard to understand as someone who has no electronics experience…

    Reply
  • July 30, 2017 at 1:06 pm
    Permalink

    "Refresh our memory" pun intended?

    Reply
  • August 12, 2017 at 9:33 pm
    Permalink

    That is so awesome!!

    Reply
  • August 25, 2017 at 2:46 am
    Permalink

    But how do you save when the computer turns off?

    Reply
  • August 27, 2017 at 9:18 pm
    Permalink

    It's genius!

    Reply
  • September 1, 2017 at 2:35 am
    Permalink

    Thanks for great video, can you please tell me name of the book you were holding?

    Reply
  • October 11, 2017 at 5:14 pm
    Permalink

    8:31 why does LED turn on ? if it's hasn't been connected to voltage source?

    Reply
  • November 11, 2017 at 9:17 pm
    Permalink

    I like it

    Reply
  • November 15, 2017 at 5:59 am
    Permalink

    Could you do a video that explains how that binary information gets translated to pixel coordination? I know it is constantly updating pixels on a screen, so surely the time delay you mentioned is actually taken advantage of to loop power cycles to the pixel component.. or is it something else? Very well explained! Thank you greatly.

    Reply
  • November 19, 2017 at 9:07 am
    Permalink

    Really, 14 minutes? haha

    Reply
  • November 20, 2017 at 7:39 pm
    Permalink

    "…or not."

    Reply
  • November 23, 2017 at 2:36 am
    Permalink

    what book was that he was using

    Reply
  • December 7, 2017 at 6:04 pm
    Permalink

    It´s explained quite simply by proof. It´s quite simple really, I was having some trouble understanding how a cpu could store a number and I could really think of one way but had no idea how that would work. This video demonstrates this. As said in video: Memory function unit works with 2 parameters: R and S where S is the value true and the value itself at the same time. When a cpu is done storing the value it breaks off the connection from the memory unit but the memory unit preserves the value. This happens because if you notice, the value is stuck in an infinite loop being constantly evaluated by S = 0 and R = 0. Which means it will never change.

    Reply
  • December 11, 2017 at 4:15 am
    Permalink

    So does a nand ssd work on the same principle?

    Reply
  • January 8, 2018 at 8:55 pm
    Permalink

    This is a nice video to explain how logic gates work. Didn't clearly explain
    how data is stored on devices like Hard Disks or Optical Disks.

    Reply
  • February 3, 2018 at 11:10 am
    Permalink

    Watching this, something clicked in my head. It all makes perfect sense now, thank you for the video.

    Reply
  • March 13, 2018 at 4:00 pm
    Permalink

    Because of you, I made a computer! Check out the video on my page. I made it control servers, leds, sounds and more! I just had to say thank you.

    Reply
  • April 2, 2018 at 10:47 pm
    Permalink

    What book is that??

    Reply
  • April 14, 2018 at 11:08 pm
    Permalink

    Dude clip ur nails ….

    Reply
  • May 31, 2018 at 1:23 am
    Permalink

    4:13

    Reply
  • June 8, 2018 at 1:51 am
    Permalink

    I lost it some time after 10:50 XD

    Reply
  • June 19, 2018 at 3:15 am
    Permalink

    So this is how SRAM works, but how does DRAM work

    Reply
  • June 25, 2018 at 1:49 pm
    Permalink

    WTF, did you actually refer to an LED as 'Led'? Rhyming with 'Bread'?

    Wow

    Reply
  • July 5, 2018 at 8:11 pm
    Permalink

    Who needs a integraded circuit? I made it with 4 transistors, a protobord, and 7 resistors. But it was realy hard. Why I didn't used a integraded circuit?!

    Reply
  • July 31, 2018 at 10:02 pm
    Permalink

    How can I erase a stored memories in an ic that's in a auto motive module ..

    Reply
  • August 4, 2018 at 12:08 pm
    Permalink

    13:40 "and all the values go to zero" um NO they don't. all the values do the OPPOSITE, the circuit is symmetrical.

    Reply
  • August 27, 2018 at 2:18 pm
    Permalink

    Hey what's the book you're using?

    Reply
  • September 18, 2018 at 4:58 am
    Permalink

    Anyone else been reading “but how do it know”?

    Reply
  • October 9, 2018 at 4:02 pm
    Permalink

    This is a example not a "how it works". Also your speech is incomprehensible.

    Reply
  • October 15, 2018 at 9:53 am
    Permalink

    This guy is very good at explaining things.
    He’s my second favourite dude here.

    Reply
  • October 15, 2018 at 9:55 am
    Permalink

    They should have been teaching us this stuff when I was in school in the 80s. We didn’t even learn dos. We were totally ripped off. It really bothers me to this day how our school board was so incredibly ignorant and yet stoic in that.

    Reply
  • October 31, 2018 at 8:56 am
    Permalink

    That's an awesome video but i'm curious about one thing; in the inverse of the AND gate, when both inputs are "0" or "off" the result comes back as "1" or "on". how is this possible on a physical level? doesn't 0 mean no electricity? so how come providing no electricity to the gate gives electricity on its own? am I missing something?

    Reply
  • November 13, 2018 at 2:32 pm
    Permalink

    sir could you tell me which is best book for computer organization

    Reply
  • November 24, 2018 at 6:12 pm
    Permalink

    I wrote two Tests about this in College Never understood what was going on. A whole year. Watched this Video and its so Freaking easy I am ashamed of failing the test

    Reply
  • December 1, 2018 at 3:24 pm
    Permalink

    Rs nor latch

    Reply
  • December 2, 2018 at 3:53 am
    Permalink

    No current limiting? Shame on you sir……

    Reply
  • December 2, 2018 at 6:37 pm
    Permalink

    beautiful video
    I really wanted to know what is the working of the sr latch
    thanks
    once again great video…

    Reply
  • December 3, 2018 at 12:41 pm
    Permalink

    This made me sleep

    Reply
  • December 15, 2018 at 10:25 am
    Permalink

    his face looks like a oblivion character

    Reply
  • December 20, 2018 at 1:53 pm
    Permalink

    Lots of types of memory, there is bubble memory and core memory now there is digital memory.

    Reply
  • December 23, 2018 at 8:19 am
    Permalink

    great

    Reply
  • December 25, 2018 at 12:20 pm
    Permalink

    Woow..you make it very simple thnx but you were using a boock what his title please…..

    Reply
  • December 28, 2018 at 8:58 am
    Permalink

    He looks kinda like Larry Page!!!

    Reply
  • December 30, 2018 at 8:53 pm
    Permalink

    Ah, the classic latch RS.

    Reply
  • January 1, 2019 at 11:16 am
    Permalink

    Q and not Q are mixed up but…..

    Reply
  • January 2, 2019 at 1:50 pm
    Permalink

    As a software type, I wouldn’t understand a thing from the video if I did not know Boolean algebra

    Reply
  • January 4, 2019 at 1:40 pm
    Permalink

    This was by far the worst Coputerphile video i have watched. Horrible explanation at the end.

    Reply
  • January 13, 2019 at 6:24 am
    Permalink

    Which animation soft is used in the videos of this channel?

    Reply
  • January 20, 2019 at 11:39 pm
    Permalink

    Why didn't he show what happens when both inputs are 1? That's the only non trivial part.

    Reply
  • February 7, 2019 at 8:52 am
    Permalink

    What is that white thing where he using the pins? Thanks 😅

    Reply
  • February 10, 2019 at 3:56 am
    Permalink

    what is the name of that book he was reading with the different logic gates on those chips?

    Reply
  • February 10, 2019 at 10:03 am
    Permalink

    I severely dislike that explanation.
    While logically, a NAND gate is taking an AND gate and then putting a NOT gate on the output, electrically it typically isn't. Electrically it is very easy to make a NAND gate directly, and for CMOS, PMOS or NMOS, NAND gates are made directly and an AND gate is actually a NOT gate fed by a NAND gate; likewise the NOR gate is done directly and an OR gate is a NOT gate fed by a NOR gate.

    Reply
  • February 16, 2019 at 11:06 am
    Permalink

    Those connections on breadboard hertz

    Reply
  • February 23, 2019 at 1:41 am
    Permalink

    I just figure out why minecraft players call this an 'rs nor latch' I had no idea the name was based on actual terminology

    Reply
  • March 2, 2019 at 11:03 am
    Permalink

    If you are interested in this stuff, go watch Ben Eater's breadboard computer series

    Reply
  • March 3, 2019 at 7:40 pm
    Permalink

    Great!!

    Reply
  • March 4, 2019 at 2:52 pm
    Permalink

    KitKat a lot of fun ! #Epitech

    Reply
  • March 19, 2019 at 5:41 pm
    Permalink

    They should have mentioned the S-R flip-flop's inherent flaw, which is: if both R and S are 1, on the output Q and /Q will be equal to each other, which is obviously not how boolean algebra should work.
    Of course there is an easy way around this, just don't let R and S be equal to 1 simultaneously. And the J-K flip-flop fixes this issue, but that requires a clock signal to work.
    Just thought this should be mentioned when talking about S-R filp-flops..

    Reply
  • March 23, 2019 at 11:08 pm
    Permalink

    What

    Reply
  • April 16, 2019 at 4:57 am
    Permalink

    Assumes you have an understanding

    Reply
  • April 18, 2019 at 6:17 am
    Permalink

    What is that book. I always have to Google the the data sheet.

    Reply
  • April 24, 2019 at 4:12 pm
    Permalink

    i love the smell of burning electronics in the morning

    Reply
  • May 6, 2019 at 12:59 pm
    Permalink

    I hope that your next videos are more direct to the point..its so time wasting

    Reply
  • May 15, 2019 at 10:06 am
    Permalink

    You should do a video on ternary cumputers such as Setun

    Reply
  • June 13, 2019 at 10:18 am
    Permalink

    Is all human are fool

    Reply
  • June 27, 2019 at 6:41 am
    Permalink

    Wtf i am doing here
    I was looking for kim kardasian brains

    Reply
  • June 27, 2019 at 5:55 pm
    Permalink

    Ok @computerphile. I cannot find the answer to my query…maybe you could help? I got your vid by asking "how can you put information in a computer chip?". I understand the whole 1 on, 0 off deal, that's not my question though. How in the world does those chips, made out of metal and stuff you could tell me I hope, hold numbers? How does a machine become capable of being able to put binary code into it in the first place? How did they figure that out too? What is so special about those chip, silicone right, that makes them able to put a language created by man, I hope or who if not, to have the ability to turn inputs off or on? I find it rather difficult to ask the correct question here. Lol. For I wanna know how it all began. How did they find out how to make the chips, how did they figure out that they could also turn those chips on or off? You getting where I coming from here? I hope so. If not I can put more detail I suppose. Just lemme know

    Reply
  • July 14, 2019 at 4:56 am
    Permalink

    7:10 diagram in s really nice!

    Reply
  • July 16, 2019 at 3:29 am
    Permalink

    It’s called a latch

    Reply
  • July 20, 2019 at 7:21 am
    Permalink

    Name of the "Gate's almanac" book?

    Reply
  • July 25, 2019 at 10:50 am
    Permalink

    Practical Electronics Handbook

    2nd Edition THAT HE USE

    Reply
  • August 4, 2019 at 8:55 am
    Permalink

    How come every single computer guy looks like this? lol

    Reply
  • August 5, 2019 at 6:36 pm
    Permalink

    Wish they put this kinds of videos into Television instead of regular empty content show they put on TV's nowadays which teaches you nothing. I understand it's entertainment business but everyone has their own definition of entertainment and I was entertained by this.

    Reply
  • September 16, 2019 at 7:08 am
    Permalink

    the office: electronics

    Reply
  • September 27, 2019 at 10:49 pm
    Permalink

    Please, could you say the name of that book? Thanks

    Reply
  • September 30, 2019 at 6:26 pm
    Permalink

    Memory is a rs nor latch, at least that's how it's called between redstoners… Anyone here?

    Reply
  • October 6, 2019 at 2:52 pm
    Permalink

    what book was that on 3:00?

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *