Direct mapped cache memory

Explanation of how a direct mapped cache memory works.

[@pallavhkust2298]

You explained it in the best possible way. Thank You so much! I read this topic from the book "Computer Organization and Design" but that was too confusing. We really appreciate the amount of work that you put in to make this video. Thank you...

[@FrederikHaaning]

Crisp, clear explanation. Thank you for aiding my understanding.

[@victoriacarneiro2807]

Best explanation I found online

[@AnasAlharbi04]

thank you so much i have an exam tommorow and you have just made my day i had a problem with understanding this lecture .. thanks again

[@Tayybayasir-g4c]

NoNononononono😮😮😮😮😮😮😮

[@JohnOConner1]

Excellent tutorial. Used this to refresh my memory of direct mapped cache.

[@ismail_]

WHAT A GENIUS, I FINALLY UNDERSTAND AFTER HOURS AND HOURS THANK YOU SO MUCH

[@QuranUrdu4k]

Great Explanation.Please continue with related topics.

[@AshisKumarSahoo1]

1 page explanation. Really nice and clear.

[@tiantuoyou2891]

Finally I found someone can explain this clearly.

[@shanfangzhao]

thanks, I got really confused during the class today but you helped me out.

[@Gman2486]

I need to pass my final.

[@jasoncessna]

hey, I have a final tomorrow as well! I ALSO need to pass. Good luck, friend

[@cuongphong95]

did you guy pass?

[@sathyaramesh6978]

Gibran C who knows

[@ahmetbayrak6045]

same

[@grab2win982]

same

[@jliu6735]

Thank you, especially for the explanation of "block number in cache".

[@rahulcoolify]

one of the best explanation. Great job.

[@Zerpentile93]

Such a simple and nice way to explain this. Thanks!

[@shashanksingh6991]

well explained.. was banging my head for hours before i found this video really very helpful thanks a lot!!

[@sohamparikh9315]

Thanks a lot! That was very precise and to the point and explains all the concepts properly. Do keep your videos coming :)

[@addictedtomusic7522]

Finally an easily understandable accent. Thank you for the detailed explanation!

[@EvilKingMacrocranios]

Thanks for helping me understand a big part of my homework!

[@ShadyDoorags]

This was very helpful, thank you.

[@faiyazelahimullick8964]

Mr. Pardo you the real MVP

[@akashchakraborty83]

Thank you very much! This is very help full..am solving a problem but i had some confusion ..now it is clear to me.

[@manfree503]

thank you very much, you have saved my brain for a quiz coming up next week!

[@FooBarWidget]

Excellently explained!

[@Mankind5490]

Just absolutely amazing explanation thank you so much

[@siddharthsharmaBelieve]

Thanks from India !!

[@hasithaeye]

Thanks from Sri Lanka.

[@karmen522]

Thanks for the video. It was very useful for me. :) Regards, University of Mataram, Lombok - Indonesia

[@BiranchiNarayanNayak]

Excellent tutorial... nicely explained.

[@darthattano]

Very nice video . . I needed to learn this topic for my report . thanks so much!!!

[@libraneverlasting]

Very nicely explained. Thanks

[@ronylev-ari3219]

Now, that was AMAZING! :) Thank you so much!

[@franciscovilla828]

Thanks for your help, but I am a little confused. In the minute 5:25 you said that d-b bits is the "block number" and the b bits the "offset", could you please clarify me why?, because I think should be b the size of block number and b-d the offset. Thanks! PS: I tried with 4 blocks (b = 2 bits) and d=3 bits address.

[@NehaJain1704]

very nice explanation.! Thank you very much sir!!

[@abhinavverma595]

Thank you! Your video is very helpful

[@HeroEngineering]

outstanding, outstanding video! Thanks so much!

[@RTmuscle_]

Awesome.Very well explained.

[@04Bovo]

Thank you soo much! ive been struggling to understand this

[@iloveyourmum00]

Thank you sir. It helps clear concepts.

[@AntoniaIvanovaStorm]

Thank you so much sir :) Keep up the amazing work

[@utkarshbhatnagar39]

Really useful video, thanks!

[@MsBourne47]

very very good lesson,thanks.

[@rappergenerico]

This was really helpful, thank you!

[@MayLava]

Thanks so much. It helps me a lot.

[@dao-lam]

This is very helpful! Thank you!

[@MatthewDaddario]

Thank you ! Very helpful.

[@jonweinstock9015]

wonderful explanation! thanks!

[@md.abdullahal-alamin8059]

Thanx! This is very helpful

[@MeqdadDarweesh]

Very Helpful :) Thanks.

[@abdelrahmanghreebmatar5445]

thanks, very well explained. Would you please clarify more the rule of the validity bit? I mean, if I am understanding right, the TAG field in the cache block tells whether or not the block really corresponds to the memory block required or not, so what is the importance of the validity bit?

[@AbelardoPardo]

It is simply to tell you if the block stored in the cache contains valid data. In certain circumstances, the content in main memory changes so much that you need to void some blocks in the cache. The valid bit allows you to do something like that very quickly. Or, you can think of the content of the cache when the system powers up. All the blocks are "invalid" and must be detected as so.

[@abdelrahmanghreebmatar5445]

Aha, thanks

[@1993bhanuka]

This is GREAT!!! thank you.

[@satadhi]

best explaination !

[@utf8redactedcharacters]

I was hoping that you'd do an example. But Thanks!

[@learnwithsounak]

this is very good thank u very much

[@DominoDay4Live]

What a hero

[@adityasinha8089]

Well explained. Thank you so much. ^_^

[@FRITTY12348546]

great video thanks

[@namanrawal5849]

Hmm..so how would I do a problem such as this one? A computer employs a 16Mbyte 32-bit word main memory and a cache of 8 Kbytes. Determine the number of bits in each field of the address in the following organizations: 1. Direct mapping with a line size of one word. 2. Direct mapping with a line size of eight words. Thanks..!

[@dominikwagner5539]

Why does the Tag contain c? It is allways the same for a specific block.

[@jcasaubon]

Awesome thank you!

[@Csartreweghhgf]

This is gold

[@nadiiachepurko6736]

Good job

[@crelloc]

How does direct mapped cache work with multiword blocks per line? We will have multiple blocks from memory refer to a single line in cache. But what if there is a cache miss, do we clear all of the data ( which contains more than one word) in the line and change the tag? I ask this because multiple blocks can refer to one cache line but some block will have a different tag.

[@MrRocksW]

Thanks so much!

[@nguyentanhai]

Thank you.

[@suryasikharej8116]

Sir this means that d-b-c = c bits? I am confused i think that the number of tag bits should be equal to cache line bits. Please clarify sir thanks a lot in advance.

[@massakrienene]

So sir, if I have a 32-bit micro-controller, can I say d=32?

[@elimarpineda6496]

thank you so much !

[@rahuldas2225]

then the offset bits are totally waste??

[@infiniteunconditionallove1620]

thank you so much

[@xingshenFe]

谢谢，thanks

[@-_hevisop8756]

thanks!

[@KaiyuZheng]

Great

[@chenxiyuan5184]

Thanks

[@EAZYDOGZ]

instead of using d b c use fuxking numbers?

[@dakanke]

he sounds like gus fring

[@karun537]

k-way associated mapping..pls upload sir

[@JosephSassoon]

Hey alex!

[@alizanda]

Howdy Joseph!

[@NoajmIsMyName]

Talking is very easy...

[@jianxiongji2578]

THANK YOU!!