The Fetch-Execute Cycle: What's Your Computer Actually Doing?

Life would be so much easier and simplier without computers

Thank you sir..i am GATE aspirant used for entrance into the reputed IITs ...this helped me a lot love from India

Always the British explain it the best. They are like parents of the world. <3 God bless them for eternity!

Good explanation but I am not convinced with the way clock cycle is explain. A clock cycle deals with a single instruction

Hmmm the word 'Fetch' appears to have unleashed a wave of dog treat adverts \m/

Excellent video. A billion thanks

The clock

This video makes it impossible for me to not hear Tom snapping fingers everytime I run the debugger on my programs

My computer 🖥️ is ignoring Tom Scott

As a RM who works closely in highly technical environments, I can't thank Tom enough for making me understand these very basic logical concepts when it comes to CSE. I'm not an engineer and I will likely never need to implement anything like this but knowledge is good and sometimes I can't sleep haha.

Thanks Tom!

Thank you so much!

Easy to read accuracy

No assembly, no construct.

thank you

Did anyone else notice "programme counter" in the thumbnail. The long version of PC always is Program Counter. I cannot let this British spelling go unnoticed.









(joke btw)

I don't know why I'm watching these, my Computer Science GCSEs finished in June

Question: Does the CPU execute each step per clock tick, or the 3 steps at once per 1 tick?

How do I snap my fingers like tom to run my computer?

Having programmed a little in assembly, I'd rather do the 4chan sandpaper room than program a game in that godforsaken language

Ohhhh!! I understand it now!! well, the underlying concepts, at least. Off to learn more about processing units :)

Incredible video

Hypno ASMR listeners watching this video are gonna have a fun time

This explanation is too complex and fast

I wish if Tom was my teacher...
This is amazing!

A computer is just a glorified calculator

I'm more impressed by Roller coaster Tycoon being made in Assembly.

Why can’t programmers just convert their code back into binary after they are done and make that the running language so that it can be easier on hardware.

that's how things should be explained..many thanks to you

Damn u are so good. U made it easy. Thanks 🔥🙌

thanks, is this why when a computers have a hard faults and have to fetch from memory fragmented HDDs can cause the cpu core to wait until it is able to read from the platter some times an audiable thrashing of the head can be heard? what we cant hear is the ram being flushed if it is read fault and cpu core waiting at max freq? or is this statement incorrect?

This way of explaining didn't satisfy me enough. You left me dangling at a position that says: Any problem, no matter how hard it is can be solved by just an "accumulator", he just needs to be fast enough :D

what's that background LEDs?

Some one give him a medal. This explanation was great

Why you looks like Linus Torvalds... ?

It's 2023 and this is still very helpful

THANK YOUU!!

I can't take my eyes off you.

isnt program supposed to be in secondary memory(hard disk) and and instructions should loaded from hard disk to Ram(primary memory)?

please god make tom scott my cs teacher

This snapping is horrendously annoying.

Brilliant video. A truly understandable one, interesting and inspiring to continue.
Bravo 👏

Everytime someone clicks their fingers I say either fetch, decode or execute

Tom's finger snaps are oddly satisfying

Does the instruction register stores only the operator OR both operand and operator OR operator and address of operand?
Like for example, 1+2
Does the instruction register store only the
+ sign
OR
store 1,2, +
OR
address of 1, address of 2, + ?

Roller Coaster Tycoon was built in assembly code! By one guy!

Tom is really a great explainer.

I think there are other registers working like ADDRESS REGISTER, DATA REGISTER and also CONTROL UNIT and ALU, working of these are missing.

👌🏻Flick and you're good to go