no keyboard detected press any key to continue

@MirekHeikkila

6 жыл бұрын

never found the 'any key' :(

@DragonProtector

6 жыл бұрын

Ikr it funny cause it not there

@zatrox9438

6 жыл бұрын

or just click a mouse button? plot twist

@beaker-yt

6 жыл бұрын

It sounds like a joke nowadays, but in the days before PS/2 it was actually pretty useful. The predecessor of PS/2 was hot plug capable and many PCs did not use but some rather obscure key-presses to get into the BIOS setup. If the system did not show you the necessary key by default and you didn't know the correct key, you simply pulled the keyboard plug out and started the system. Then you got the infamous "No keyboard found. Press any key to continue." message, often followed by something like "Or press to enter setup." Then you just plug the keyboard back in and continue. We had some systems where provoking this error was the only way to get into the BIOS setup. Ah, those were the days...

@miksuko

6 жыл бұрын

Beaker those were the (bad) days

The virgin usb keyboard: > Has to wait his turn to get the cpu's attention > Politely asks the cpu to accept the new input > General purpose port, has to identify himself as a keyboard before the system know what to do with him > Gets blocked when a virus kills all access to usb devices > Hot sawappable and is okay with that > Gets confused when you hit too many keys The chad PS/2 keyboard: > Always works, doesn't stop until power goes down > Literally interrupts the cpu, tells it to work on its input before anything else > Has his own dedicated port, system know who he is before even the bios is loaded > Literally impossible to kill besides unplugging it > Not hot swappable, when unplugged it crashes the whole system like a true alpha peripheral > Couldn't care less how many keys you press, has full native n-key rollover

@theteddychannel8529

4 жыл бұрын

Yes

@AgentMCCityDE

4 жыл бұрын

alpha peripheral 😂

@RokeJulianLockhart.s4eb2q

4 жыл бұрын

I love this.

@argo117007

4 жыл бұрын

ThatLonelyFox you spent way too much time on this for just 100 or so likes

@pacmaxer8206

4 жыл бұрын

FUCK YEAH!

feel like its time for a new version of the PS/2 maybe PS/3?

@WHA_YT

4 жыл бұрын

da, gamers needs separate keyboard and mice ports like PS/#, that directly rule CPU.

@vedo94x82

4 жыл бұрын

A PS/3 would be perfect as a dedicated USB port with more features and backwards compatible. or Maybe special drivers that can make USB send System Interrupts.

@h6502

4 жыл бұрын

we'll put valve right on it.

@nerdyneedsalife8315

4 жыл бұрын

@@nacroni PS/2 was named after an IBM computer lineup. The PersonalSystem/2

@thekrispyprince7463

4 жыл бұрын

And then comes PS/4 and PS/4 pro.

Another advantage of PS/2 that seems nobody mentioned is the fact that dedicated ports also free up space for another USB devices you want to connect.

@azaria_phd

2 жыл бұрын

Tbh it's not like people constantly use the USBs at the back. Heck, most people cannot even use them without moving the case.

@UsmanSiddiq1

2 жыл бұрын

@@azaria_phd that takes away advantage of USB,its plug and play features

@da_pawz

2 жыл бұрын

@@UsmanSiddiq1 Yup, many people too lazy to use the USB port in the back, and only rely to use front panel USB or use USB hub in their desk lol

@VRNocturne

2 жыл бұрын

@@da_pawz Really? Just about all my back ports are used - I'd welcome freeing one from my keyboard. Almost seems like a waste of a slot, honestly.

@tormodhag6824

Жыл бұрын

Currently chilling with my Mac that must have a hub connected if i want USB type a. A bit too much of one type of you ask me, HDMI and USB a would be nice

PS/2 is obviously superior as you don't have to flip it 13 times to figure out which way it plugs in.

@narcoleptic8982

5 жыл бұрын

Zared Martorana proof that USBs exist in 4 dimensions.

@qwertydesigns2485

5 жыл бұрын

Zared Martorana 1 year 1 month 1 day ._.

@guilleratcon4357

5 жыл бұрын

lmao

@khrxmme5498

5 жыл бұрын

nice

@davidsavage8930

5 жыл бұрын

WHY DO PEOPLE STILL SAY THIS? THERES 2 FUCKING POSSIBLE WAYS AND ONLY 1 WORKS ON TOP OF THAT, IF YOU HAVE ENOUGH LIGHT TO SEE YOU CAN FUCKING SEE WHICH WAY IS CORRECT AND IF YOU CANT SEE YOUR OWN FUCKING HANDS WHAT THE FUCK ARE YOU DOING TRYING TO PLUG SOMETHING IN TURN A FUCKING LIGHT ON EVEN IF ITS YOUR PHONE SCREEN I CANT TELL IF THIS IS A JOKE FFFFFUUUUUUUUUUCK!!!!

"Having my D pushed down" - Linus 2017

@guigs4467

6 жыл бұрын

"...D key..." Sounds even better

@CGFUN829

6 жыл бұрын

Ash Ketchum LOLLLLL

@adriananzano2292

6 жыл бұрын

LinusSexTips 😂

@Andrew-ry9be

6 жыл бұрын

Lol

@crispybacon4240

6 жыл бұрын

+Specter Oh shut up...

Holy crap! That's my stock photo for the ps2 adapter in the video thumbnail!

@anuragrai612

3 жыл бұрын

Wow!

@SaqinNoor

3 жыл бұрын

Really!? Or are you joking?

@SaqinNoor

3 жыл бұрын

Your photo's link please

@wof8131

3 жыл бұрын

He is joking lmfao

@molw9954

3 жыл бұрын

@@wof8131 How do you know? I barely know anything about stockphotos but how do you know.

Hey, you should use that high speed camera to measure PS/2 vs USB latency.

@tommykarlberg

4 жыл бұрын

With and without Ps2 Rate running I presume ;) Kind of strange this about latency didn't came up in the video.

@dennisren5786

3 жыл бұрын

the difference wont be visually perceptible probably

@tormodhag6824

3 жыл бұрын

People who claim that PS/2 is superior speaks straight bullshit, especially if they bring up latency. The difference is so unsignificant that it doesnt bring an advantage. In compatibility, PS/2 is very superior tho

@MelroyvandenBerg

3 жыл бұрын

I agree!

@jjoonathan7178

3 жыл бұрын

Poll rate is 1ms for USB1 and 0.125ms for USB2. Hardware and drivers are free to do worse than that, of course.

Yo, I have a decent reason for using a PS/2 port: saving USB ports if you're low on them.

@Cyba_IT

5 жыл бұрын

Valid

@thelanke

5 жыл бұрын

i am with you man thats right

@darlingimscared

5 жыл бұрын

Amen.

@ItsRezzo

5 жыл бұрын

USB expansion bays

@rafaelbogdan9307

5 жыл бұрын

But why not _both_ ?

2:13 The legend says that the mouse is still waiting for a response from the CPU

@KimboKG14

4 жыл бұрын

stil waiting.....

@DessertMonkey

4 жыл бұрын

But the CPU never wrote back...

@kexasen4137

4 жыл бұрын

"Right click" -Last online 69 years ago

@eliaswilliamsson8553

4 жыл бұрын

Notice me CPU-senpai!!

@01100101011100100111

4 жыл бұрын

The mouse said it was moving left. It didn't know that it was also left behind.

For extreme overclockers, the USB controller will stop working at very low temperatures which is inconvenient for liquid nitrogen or helium overclocking. PS/2 on the other hand will work nonetheless allowing you to change the overclocking settings. This is why many high end overclocking motherboard still includes PS/2 ports.

Where is the any key?

@Haitch_1_

3 жыл бұрын

on the keyboard

@frenchmangocider

3 жыл бұрын

@@Deaft_shot i was looking at the monitor

@iXenox

3 жыл бұрын

on the pc front, but you can also open your pc and mash a piece of metal around the motherboard to turn it off (permanent change)

@TheBloxxedSanarcati

3 жыл бұрын

@@Haitch_1_ idiot, it was on my table not the keyboard.

@KyranSparda

2 жыл бұрын

Nice Simpsons reference 🤣

PS/2 connections are also BAE for troubleshooting. Like Linus stated, PS/2 can be recognized as soon as the computer is powered on unlike USB where the USB-Controller has to be loaded. But yes, it is also annoying not being able to hot swap...

@sparkplug1018

6 жыл бұрын

Pros and cons to everything in life really.

@vwestlife

6 жыл бұрын

PS/2 devices can be hot-swapped, just not all the time. I've experienced times when doing so causes the keyboard or mouse to not be recognized until you reboot, but instances of it causing damage are very rare. And a lot of times you can get away with it with no problems.

@InvidiousIgnoramus

6 жыл бұрын

VWestlife careful, VW, saying that kind of thing is liable the get a $user to break something.

@deddddddd9948

6 жыл бұрын

usually you can buy PS/2 splitters, but sometimes said splitters are unreliable.

@moczikgabor

6 жыл бұрын

Officially not hot swappable, but rarely causes any problems if you do. If it was plugged in and already recognized at boot time, then most of the time you can unplug and replug without reboot.

The PS/2 ports also have higher interrupt priority than the USB ports. This means it is possible for the PC to become so braindead that it will not accept any input from the USB device,. This means that even though the ctrl+alt+delete key combo would normally generate an unmaskable interrupt and crash the system, in certain cases of bad brain death the computer will refuse to respond to the keyboard and not do as told. With a PS/2 keyboard, you don't have this problem and ctrl+alt+delete will reliably crash the system as intended.

@bigdoggo5827

5 жыл бұрын

Thats some usefull info

@bastiaan0741

5 жыл бұрын

Had this happen last week, at startup, with an old computer. Good thing I have a spare ps/2.

@PescaitoFrito

5 жыл бұрын

sadly my G15 logitech doesnt work with the USB adapter to PS/2 Nor my mouse m100 normaly usb or the g9 mouse none of them :( i waste my money.

@Commander_ZiN

5 жыл бұрын

@@PescaitoFrito usb adapters aren't always wired the same and are only supported by specific keyboard. They were a transition technology and the keyboard would need to be able to run in either ps2 or usb mode, I doubt you'll find modern keyboards that support this. If it doesn't come in the box it's not supported. PS2 isn't any better than a quality USB keyboard. Back when keyboard first went USB they were all crap you could clearly see the difference, it was a few years before you started getting 8+ key rollover and 1000hz polling rates. These days you can't tell the difference and the benefits of USB outway PS2. However I'm still glad I have a PS2 port, I haven't used it for years but I like having the option. Also who cares if ctrl+alt+del doesn't work, your restarting your pc anyway at that point or you could just replug the usb keyboard.

@anonimnotbad3410

4 жыл бұрын

@@Commander_ZiN So for games specifically requiring speed and key combinations of more than 1, is it better to use PS / 2 or USB?

Me: so my pc has 3 usb ports and 1 ps2 por- My Friend: So it can play ps2 games? Me: Well yes, but actually kind of

@dhm-2920

4 жыл бұрын

Tyler Dietz so what games do you have ?

@abscbnph1148

4 жыл бұрын

Nothing lol

@sethadkins546

4 жыл бұрын

Hes too young

@TECHNDJ

4 жыл бұрын

@@sukecchizu because its modern motherboard

@ravin6771

4 жыл бұрын

Snag

This Linus guy is awesome,he should make a channel named Linus tech tips

@abdallahhesham87

4 жыл бұрын

Yeah, i feel he could make an entire business outta that.

@blacknightgaming8987

4 жыл бұрын

Yeah! And maybe like... hire some other guys, help others KZreadrs make like cool JARVIS type systems in their companies

@bajablastbong2939

4 жыл бұрын

he does it’s called linus drops every fucking thing and breaks it on youtube!!

@snorke4548

4 жыл бұрын

Wouldnt that be amazing

@reganbond61

4 жыл бұрын

Viral Dev a good idea from a very good boy

Most of those downsides wouldn't affect me as i never unplug my mouse or keyboard unless they are having an issue.

Ps2 mice and keyboards have saved my butt many times when Windows 10 decided it didn't want to recognize their USB counterparts anymore.

@Apollo2001

6 жыл бұрын

Lawrence Lentini fr ? WTH were you using bc that sounds damn near impossible

@larrylentini5688

6 жыл бұрын

31337 Clan Certain emulators, dual booting and other stuff I do can cause you to have driver glitches with Windows 10 and when that happens you can't use USB mice or keyboards that require drivers.

@largol33t1

6 жыл бұрын

What are you talking about? I've used Windows 10 since its release and it has never rejected my keyboard or mouse or had problems with connectivity or response. I hate Microsuck as much as anyone but ironically, the connectivity has never been an issue for me.

@larrylentini5688

6 жыл бұрын

I do weird things with Linux and emulators that Windows 10 doesn't like, it really isn't a big deal though because it's easily fixed with a Ps2 keyboard. My main problem with windows 10 is the constant forced updates that change my settings and always seem to make something stop working.

@GraciaClara

6 жыл бұрын

Same here, the forced update made my bios got glitch regarding USB ports

you can even use the PS/2 keyboard to power on the computer when it's off, by pressing a certain key or key combination, depending on the motherboard BIOS settings, which saves me from having to reach to my desktop to press the power key, when I can just simply press Right Alt + Print Screen key to power it on

5:37 Linus: *winks* Me: He knows!

@ZaHandle

4 жыл бұрын

Idrees Ahmad 34 zettabyte of 8k 480fps 2048 bit audio hentai with 200+ backup servers around the world all transferring file via the tor network plus alien grade encryption

@rhyhood9328

4 жыл бұрын

Then I suppose you should get tunnelbear

@matthewfarnsworth5524

4 жыл бұрын

Lol

@RedWolfGameryt

3 жыл бұрын

Lmfaoooo

I play old games on a nuclear reactor so i don't need to worry about latency

@wader0073

6 жыл бұрын

Jj BB i have a 1 core 2 ghz and 512 mb ram with 400 clock speed with a asus something gpu with 256 mb vram. I play gta vii, witcher 5, fallout 13 old vegas and half life 3 with extra high settings. I think im going to sell it to nasa they said it was a super computer and they want to pay 10000billion bitcoins.

@wader0073

6 жыл бұрын

Also latency doesnt even exist on it

@AnthonyN05

6 жыл бұрын

Oh good.

@1ch190

6 жыл бұрын

keep dat boi cool

@slayerofthebad9265

6 жыл бұрын

That would be pb for 'petabyte'

Linus wants to kill his audience with dad jokes.

@YoKaze

6 жыл бұрын

i luled

@HIHIQY1

6 жыл бұрын

Well, he _is_ a dad.

@360xxx_swagluvunohomosapie9

6 жыл бұрын

thats no excuse...

@DuckTheFinn

6 жыл бұрын

So puns are called dad jokes nowadays.

@Aelfraed26

6 жыл бұрын

^Duck Only very bad puns.

Some older motherboards (5-8 years old) won't let you into the bios because the USB keyboard input isn't recognized initially. PS/2 is then the only way to get the computer into the BIOS setup. Always good to have a PS/2 keyboard available for that if you service older machines.

1:53 My ears… 😂😂

The good about PS/2 is that you don't use the USB, so if you have not so much USB Ports, you use the PS/2 the problem is: Don't have in Laptop's. And laptops, are where the USB problem starts.

@3ountyhunter

5 жыл бұрын

If you really are that desperate, a small USB hub would work.

@kisspeteristvan

5 жыл бұрын

This is legit , especially lately , when every mobile device moves to less and less ports .

@bibuserafim4670

5 жыл бұрын

Get a laptop with 3 USB ports. 3 aren't enough for you ??? Get a gadget that makes more USB portes from 1.

@dawgcuesorodrigoaguirrecod2705

5 жыл бұрын

I have a usb hub so it isnt a problem ;)

@NottJoeyOfficial

5 жыл бұрын

3 is just enough ports for me, but if I ever wanted to connect another thing to a port I'll need to swap something out. I usually don't need more than three but if I do it's an annoyance.

It used to make a difference, when processors were slower, and so many things used USB & competed for its bandwidth. I gave up on PS\2, when it stopped offering a performance advantage & actually seemed to hinder performance. The baud rate is limited on PS\2.

1:52 didn't see that coming haha

I had an old PS/2 KVM switch so that I could access all my PCs (servers) from a single console. It became increasingly more difficult to find motherboards with PS2 ports and so I turned to USB to PS/2 adapters. That was a nightmare - you never knew when the system would stop recognizing the devices. So I broke down and bought a USB KVM switch and, except for a slight bit of latency between switching from one computer to another, it works well. Also, Tunnelbear does not support Torrent software, making it almost worthless.

Violet = Keyboard Green = Mouse

@MegamanNova

6 жыл бұрын

tris Do you have a PS/2 port where I can plug my tool? If not, I think we are incompatible.

@tomf3150

6 жыл бұрын

PM Salvo: Or not, this was true on especially old devices, but "recent" (2000+) motherboard are fine if you switch them.

@MegamanNova

6 жыл бұрын

Tom F Wow, I didn't had that when I had a PC back in 2003. Do you know if the ports are still colored green and purple? Because it would be weird if they still color coded the ports if they are interchangeable.

@ZNemerald

6 жыл бұрын

Mine only has one port and the it is colored half green and half purple.

@England91

6 жыл бұрын

ZNemerald on most modern boards its just a solid colour and can be used for the keyboard or mice

So USB is the computer equivalent of Isabella from Phineas & Ferb?

@usernamenotavailable

6 жыл бұрын

Darian Mccants I see what you did there

@AdelAlqadi1

6 жыл бұрын

Darian Mccants I don't. What

@MickyVideo

6 жыл бұрын

Explaining the joke makes it not funny anymore: Isabella is one of the main characters from Phineas & Ferb. Most episodes have her ask the protagonist the question "What are you doing?" and the answer is usually something unusual.

@yourlocalneckbeard5182

6 жыл бұрын

Micky strange to find a Russian time here

@aidenfgc2855

6 жыл бұрын

actually usb stands for usabella 2.0 or usabella 3.0 which is a lot more annoying

“VPNs are hard to use” Uhhhh. I was overseas for 4 years, used countless VPNs, including tunnelbear, which was complete shit, and none of them were more complicated than simply pressing the “on” button.

@WyvernApalis

4 жыл бұрын

Major oof Well at least LTT dumped tunnelbear

@Ultimateharen

4 жыл бұрын

I use turbo vpn

@danielhebard1865

4 жыл бұрын

@@Ultimateharen I really like ExpressVPN myself.

@backlogbuddies

4 жыл бұрын

They used to be. Before you had to type in the ip and manual connect. But that hasn't been true since like 2012?

@backlogbuddies

4 жыл бұрын

@@danielhebard1865 me too. It worked in China. That's all that matters to me

I did actually bend one of those pins on one of my PS/2 keyboards

@badware2266

4 жыл бұрын

I did that too and it still works fine without the pin only thing i cannot press more then 4 keys at once

Im using a USB to PS/2 adapter just to save a USB port because I only have 2 ._.

@Krytern

6 жыл бұрын

Wouldn't it of been better to use a USB hub and get more ports rather then save just one by paying money for a adapter? No sense...

@jawr1215

6 жыл бұрын

Krytern UK decent powered usb hub = $20. Usb to ps2 adapter = $0.5 (or free since most have one somewhere).

@TheDevil259

6 жыл бұрын

Do you still get nkey rollover this way?

@qwertyuiopzxcfgh

6 жыл бұрын

Damian Anlauf Using an adapter means that you get the worst of both worlds, so I'd guess not.

@TheDevil259

6 жыл бұрын

qwertyuiopzxcfgh I'm not so sure because considering how PS/2 works, a USB to PS/2 adapter should not work at all, at least not a passive one.

"Having my D key pushed down".... dang dude, thats deep

@Peng_Pong

5 жыл бұрын

*deep*

@aaryanramourti3081

5 жыл бұрын

Lmao

Ps/2 will always be useful for PC repair because sometimes the BIOS only wants to respond to a PS/2 keyboard

Also interesting to know: Extreme Overclockers prefer the PS/2 Interface, because USB tends to stop working at very low temperatures

my school uses all ps2 keyboards

@RussT147

6 жыл бұрын

The students at my old middle school use to unplug the keyboards and mice. The IT guys were always in alcoves

@genericusername6644

6 жыл бұрын

Broken Bucket Yeah same at my old school too.

@PuggPoo

6 жыл бұрын

Francisco Santos maybe.....😂

@WeeTinyGamer

6 жыл бұрын

My ps2 keyboard uses all schools

@olgierdvoneverec4135

6 жыл бұрын

My uses school all ps/2 keyboards.

From what I've read, since USB 3.0 has full-duplex, that allows hardware interrupts again as well if it's implemented correctly in the keyboard

Thank you, Techquickie!!! I just saw this video and it explains a recent phenomenon with my PC--my USB keyboard has been shutting down (and not waking up) after inactivity during the day (my USB mouse connection seems immune to this issue). After much Internet searching I discovered that USB connections are subject to Win 10 power settings. But this video went further by highlighting what is actually happening when the PC turns off inactive USB peripherals. I am going back to PS/2 connections!!

I'm actually glad that 6 years later - they are still putting a combined keyb/mouse ps/2 port on motherboards because I like old tech and I like to use new old stock input devices on my modern computer. It's especially useful for vintage mechanical keyboard enjoyers but I like a few different membrane boards from back in the day as well as my mechanicals. You can get some good quality serial/ps/2 to USB adapters these days but it's just satisfying to use it the way it was intended 15-30 years after it was made.

He doesn't even mention the biggest reason that i use a PS2 keyboard: i can boot up my PC from being shut down (not sleeping) by pressing a key (PS2 BIOS option).

@amshermansen

6 жыл бұрын

Yeah.... USB can do that too though.

@raptor15sc

6 жыл бұрын

No. I'm not talking about any kind of sleep or hibernation, I'm talking about Shut Down (fast startup can also be turned off). I've never seen an option for USB to do this.

@geepersoilyrag1884

6 жыл бұрын

I have a always on option for USB in my BIOS. I can turn on pc by a keyboard press from a shut down state

@LeBeautiful

6 жыл бұрын

and how do u do that shit

@dondonini

6 жыл бұрын

USB Can do that too from shutdown. It's an option in BIOS as long as your computer detects that the USB device is a keyboard

We only have an old NEC Windows 95 keyboard and an old Compaq mouse that came from a 5100 or something. The funny thing is this is all being used on a Windows 7 computer. I still like it though.

@TheSpiritOfTheWest

5 жыл бұрын

Creeper 34lol your keyboard should be worth a few hundred

@kairon156

5 жыл бұрын

Windows 7 4 life.

@bradsmith1934

4 жыл бұрын

@@TheSpiritOfTheWest I was given a Win 95 NEC "complete system" than was used for 4 hours & put away. I recycled the Keyboard/Mouse/CPU but kept his acc. 'bullet proof" HP Deskjet932C Printer & 14" CRT Monitor. I also had a German built Keyboard but it took too much Desk space.

Your reference to the advantages that PS/2 can give you when you are having boot problems -- this is SPOT ON. I realized this the first time I upgraded my Linux OpenSUSE Tumbleweed and it didn't want to recognize any USB keyboards I plugged in. It was time to return to PS/2. And yes, I am also an IT guy. :-) Sometimes, simpler is better.

I've been using the same IBM keyboard for 20+years via ps/2 connection. It's just a good keyboard. It's comfortable and I can rest my hand on it without accidentally pressing and unwanted keys. Idk, it just feels right.

I had the a Microsoft Sidewinder Dual Strike controller when it launched in 1999 as one of the first USB only controllers. I was amazed of the nature of USB at the time and how you could attach your device without shutting the computer down. It was such amazing deal!

Worth noting that interrupts have significantly more 'initial' overhead than starting a polling window. Polling is generally bad practice for events that do NOT happen often, since the system will spend a lot of time waiting around for nothing, which is even worse than the interrupt overhead. However, in the case of a mouse which moves around constantly, there's arguably an advantage to polling over firing 100s of interrupts a second to the OS and waiting for the interrupt handler. If you know that the mouse is always going to be moving (example: FPS game) you may as well check it for yourself frequently instead of waiting to be interrupted over and over again.

@robertvandeneijk1284

5 жыл бұрын

This holds even more truth on todays multithreaded systems. However, as a coder, I find polling aesthetically ugly. But that's a problem in my head, not the pc.

@alfredomartinezcaceres3936

5 жыл бұрын

Yeah, sure, fps, but that's just only one particular use. For most uses the interrupt system should be better than polling system. However, we are (sadly) driven by industrial efficiency, rather than user focused. So the predominant idea is to produce more computers with the simpler factory lines, which includes less different ports, if possible only one (some computers are so useless that don't even have an ethernet port)

@someguy4915

Жыл бұрын

@@alfredomartinezcaceres3936 None of this is true though, as USB's polling (even USB1.1 with its 12Mbit/s) is still faster than PS/2's interupts. The total time USB takes to poll and process a scancode from a USB keyboard vs the time it takes a PS/2 keyboard to send its scancode using an interupt is in the range of 15-100 times faster than PS/2 (depending on USB version). Besides that, most PS/2 ports on computers the last decade or so are just connected to the USB controller on your pc, which has a backwards compatible mode for PS/2. This means for most people that have used PS/2 keyboards the last decade or so, they do not have interupts.

@lopwidth7343

Жыл бұрын

For keyboards it makes sense, as it was designed for, for mice it might make less sense sending 100 or even up to 200 interrupts. I'm not knowledgeable enough to judge. Early ps/2 mice, like the microsoft scroll wheel mouse, did only send 31 interrupts and you could change to a max of 62. Later mice did 100 by default, with easy changeable to 200 in the mouse properties

Long time ago, my friend had usb to ps2 converter. His old pc none any usb port. He tried thumbdrive with that connverter. Never heard of him since.

@fauzan.k.arifin

3 жыл бұрын

So he plugged a USB drive through a PS/2 port??

@KyranSparda

2 жыл бұрын

@large monke No he transcended time and space and gets transferred into the cyber land.

@4:50 I wish I still had mine... That's what I played wc3 on love those older keyboards

Still today, if the computer has a PS2 port. It is more reliable with keyboards when there are problems. It is still my first choice and is my tech keyboard when I'm working on other people's computers. Also leaves more USB ports to be free and open for other devices. The other reason why it's nicer, is trouble shooting and trying to get into BIOS. PS/2 seems to work better. Personally, my primary keyboard was made in 1995. They don't make it like that anymore. Only two or three keyboards in the world has its much better layout. Really, it is not difficult to make a keyboard with a big backspace key and a big L shape enter key. BenQ makes one... Finally.

@desumoyo

5 жыл бұрын

4 Month late: But what you describe is any ISO keyboard (instead of ANSI)? en.wikipedia.org/wiki/Keyboard_layout#/media/File:Physical_keyboard_layouts_comparison_ANSI_ISO_KS_ABNT_JIS.png

@bradsmith1934

4 жыл бұрын

@Toby Henderson The Adapter I use is not just a "Plug-Plug" thing the size of a Thimble but a KVM Switch. Does both Keyboard & Mouse. I do not think a simple Non-Electronic Adapter will work.

@kalijasin

4 жыл бұрын

@TexasCat99, its Ps/2 NOT Ps2. Ps2 is a gaming console NOT a computer port.

@elsasslotharingen7507

4 жыл бұрын

@@kalijasin Oh for christ's sake shut the fuck up

@harshitmalav8354

3 жыл бұрын

@@kalijasin stfu

0:35 thats some ugly keyboard u got there

@maxwellulous820

5 жыл бұрын

kzread.info/dash/bejne/faSixpaIhsmdn9I.html

@garrettk7166

5 жыл бұрын

It's like Lil Jon had grillz installed on the keyboard, and then somebody vomited on it.

@venturoes1912

5 жыл бұрын

I mean to me it looks pretty nice its probs just the camera that made it look worse like the flickering lights

@pain-gaminghub5169

5 жыл бұрын

give it to lil pump that ugly keyboard

@dre.s52

4 жыл бұрын

get it? hahah

3:28 now thats a lot of damage

@sunwolf87

4 жыл бұрын

FLEX TAPE!!!

@oliwier000b

4 жыл бұрын

How about a little more? BUCKET

When linus said “Well hold on” the video started buffering and still is XD

Psh ps/2 is cool... but only if you have a mouse with balls!

@Jake0997

6 жыл бұрын

my mouse is neutered, more cyborg, lazers, ect, but soon ill reinstall his balls, with logitech brand trackballs, 100% ready to take on the track and field sports

@geo58impala

6 жыл бұрын

Ball mice suck. You have to keep cleaning them and they keep on dying on me. laser mice are much more reliable.

@master4gameplays

6 жыл бұрын

geo58impala Optical mice are even better

@geo58impala

6 жыл бұрын

I only use optical mice if I can.

@geo58impala

6 жыл бұрын

Isn't laser mice the same thing as optical mice?

4:10 he still has the tag on the hat lol

Another downside to PS/2 interfaces is that they talk at around 10kbps, so you're going to get delay from the data transfer instead of the polling delay.

@ZaHandle

2 жыл бұрын

to be fair you don’t need that much bandwidth for a keyboard

@JackPorter

Жыл бұрын

10000 bytes per second, just to send a single byte signal. that's 10k operations per second. if we convert that to milliseconds, that's 10 operations a millisecond (aka 0,1 milliseconds per operation). my monitor refreshes every 2.4 milliseconds. I think I can handle a 0,1 millisecond operation, by the time my screen has refreshed i could have pressed 24 keys, at least if i was from X-Men.

@intron9

Жыл бұрын

PS2 isn't superior at all. It is the same than usb 1.0 only if you push one key at a time, but if there are more more keys pressed, it's always worse. This is because one USB 1.0 packet takes equal time to transmit as one PS2 packet, but the ps2 packets only hold one key on/off command, and the USB ones hold up to 6 key states plus the ALT/SHIFT/CTRL/WINDOWS states (left and right ones), totalling 12 keys. (and that's just usb 1.0, it gets faster on the later versions.) Also, on PS2 , the message of a key release , takes twice the time than the message of pressing a key. The lack of speed is by far more important than any other usb latency problem. I used as reference Ben Eater's video "The USB Protocol"

@someguy4915

Жыл бұрын

@@JackPorter 10Kbps is 10,000 Bytes per second now? No, 10KBps would be 10,000 Bytes per second (notice the b vs B, bit vs Byte, seems like a small difference but it matters here :P) PS/2 doesn't just send a keystroke, it sends a scancode. Each key press generates a scancode, each key release also generates a scancode. Most keys have a 1 Byte scancode generating around 10 bits of data, some keys have a 2 Byte scancode. So in reality the bandwidth isn't 10,000 keys per second but more like 600-700, which still seems higher than a human would type but isn't anything special in terms of speed. Btw, your monitor doesn't refresh every 2.4 milliseconds, or it would have a 461.7Hz refreshrate, many times higher than even the best HDMI standard can handle.

USB is for modern systems and with USB legacy enable in the mainboard bios it works for older operating systems with DOS mouse driver like the Cutemouse-driver too.

0:24 looks like a group of sperrm

@DopeAgario

6 жыл бұрын

69

@toontownlegomaster

6 жыл бұрын

Dope ha

@LagiohX3

6 жыл бұрын

Are u saying connecting cables is just a massive orgy of electronics

'90s throwback? More like '80s throwback -- PS/2 (as well as VGA) has been around since 1987.

@neehgurg2111

6 жыл бұрын

VWestlife PS/2 as been around from 1987 to 1996, and that's almost entirely in the 90's.

@vwestlife

6 жыл бұрын

Linus is a '90s throwback.

@jeffreyaaron1512

6 жыл бұрын

So by 1989 you are saying it had proliferated to a common household name? I was born in 85 and was using AT keyboard connectors and Serial mice for several years in the 90's as not everyone could afford the latest shit. By the time USB came around I was probably using all 4 standards depending on whose stuff I was working on (playing with too lol).

@jeffreyaaron1512

6 жыл бұрын

Most businesses and government are dual monitor these days so it's a huge amount of VGA & DVI together. But DisplayPort is making a huge presence. Most Dell mini desktops have DP and ship with DP to DVI adapters. Even their older docks are dual DVI/DP. The newer Lenovo & HP docks are often Dual DP with 1 VGA but it varies a lot.

@accountclosed9935

6 жыл бұрын

VWestlife It's brilliant always seeing you around KZread.

Wow-brought back some memories talking about IRQ and showing those ports. the old days of manual configuration on some of them. good info and may look at the VPN soliton

In my experience, in a data center environment, PS2 style keyboards and mice work more reliably with KVM switches than USB ones do.

@stephensnell5707

Жыл бұрын

That's false USB devices are 100% better than the outdated PS/2 DEVICES

@someguy4915

Жыл бұрын

@@stephensnell5707 And yet, switching USB keyboard and mouse over a KVM switch is usually unreliable. We're not even talking about the cheap KVM switches people have at home, we're talking >$3500 KVM switches with RJ45 (not ethernet) cabling and they still often drop the mouse or keyboard connection when switching... PS/2 has never had that issue so in most deployments we still use PS/2, even though technically it is inferior, switching USB between computers was never intended and as such, rarely works stable.

3:30 when Linus gets too excited and smiles a lot you know he's gonna change his mind and say hold on

And then there's me, still having some computers who haves a serial mouse, DIN keyboard, and LPT1 printer xD

@BlackDragon-tf6rv

5 жыл бұрын

Amen

@Elenrai

5 жыл бұрын

A serial mouse? Sir, you make me proud!

@magnusnilsson9792

4 жыл бұрын

Have you tried using the COM-port for LAN? I tried once, it took 5 minutes to send an "end turn" of Heroes of might and magic.

@ajbalbastro

4 жыл бұрын

Xd

@elfedorausado

4 жыл бұрын

Same here

Yes. Recently, I was working on creating my own USB drivers for homemade USB devices but we can't imagine the quantity of data sent over USB ports especially for keyboards and mice! Btw, by looking at the PS/2 connector pinout, it seems that we have the same signals as I2C or unidirectionnal SPI buses! It should be interesting to make a few experiments with it. There is this interrupt controller 8259A that allows the CPU to do its own business and switch to keyboard/mouse activity whenever a PS/2 signal triggers an IRQ. My motherboard has only one PS/2 port (half green half purple) which is strange. So someone has to choose between using it for keyboard or for mouse. As far as I know, I have never seen PS/2 wireless devices like keyb and mouse so for comfort I guess it would be easier to choose USB. Lately, the USB mice I had, demonstrated erratic behaviours (no response to moves as well as to buttons pressed) and I guess (but have no proof) that a PS/2 mouse would work better. Regarding the other ports, I am perfectly happy with no LPT DB 25 port at all but having so electronic stuff to do every now and again, I miss the serial port DB9 a lot!

There is a timer interrupt, which I think is what makes system to query usb keyboard and mouse current state, so ints that are sent to the cpu might in fact be more efficient, let alone no latency.

Happy 30th Birthday PS/2 Port!

@Isaax

6 жыл бұрын

David Summers damn

@BlackSmokeDMax

6 жыл бұрын

David Summers damn, is that it, only 30? Honestly I would have guessed 35ish.

Model-M user here. You will pry the beige clicky keys from my cold dead hands.

@UnicornStorm

6 жыл бұрын

Same here. The Model M is just awesome!

@coffeepot3123

6 жыл бұрын

Sgt Moose, Dam near governmental intervention up on old fabulous tech!. I would rather drop dead than be forced to throw away my rubber ball mouse.

@tylerjohnson3070

6 жыл бұрын

I wish I had a model M but I do have an old gateway clone that's awesome

@PhilippeCarphin

6 жыл бұрын

I have an active PS2 to USB converter since half of my hardware doesn't have PS2 ports. (this thing : www.amazon.com/Sewell-Active-Adapter-Keyboard-Mouse/dp/B008J56RVY )

@christophero1969

6 жыл бұрын

A company called Unicomp, Inc., still produces the model M from IBM's original tooling. They also make a USB version.

I'm currently using a DIN to PS/2 converter :) gotta love those old school clicky keys

Sounded like 1:44 was a terrible missed chance to start singing the Cupid Shuffle

Can one port to rule them all ever exist?

@cpufreak101

6 жыл бұрын

TheBodyOnPC USB C

@romanbukins6527

6 жыл бұрын

Justin Noker Nope...,That would be either USB or the Antenna socket on the back of any TV. Good luck using type c to watch tv or finding type c sticks. Plus a type A would fit on most phones had they made them half a centemeter thicker.

@sasuke2910

6 жыл бұрын

Doesn't offer the security and compatibility of PS/2.

@obviousstar4041

6 жыл бұрын

Roman Bukins ... It's not yet but usb c will be the next thing unless something else comes out

@RPRKNG

6 жыл бұрын

Coaxial

USB is a bus! The more USB devices on it, the slower it gets. You can't get into some BIOS's with a USB keyboard. PS/2 rules!

@nasc1333

5 жыл бұрын

Kev G sir what year do you think it is

@Elenrai

5 жыл бұрын

@@nasc1333 2019, and I am still rocking my old PS/2 compaq keyboard! (Its like 19-21 years old) PS/2 masterrace represent! o/ All your ports are belong to us!

@nicolaspinto2927

5 жыл бұрын

@Tiny Metal Tube USB is for more than just HID, imagine what happens to the shared bus when you're cruising through an external drive (as an example, doing routine backups) or a webcam for streaming. Those high bandwidth devices running full steam will choke out nearly all other devices or more likely be throttled by the hub and suffer loss in performance. It's a /universal/ serial bus, not just a slot to stick overpriced flashing RGB keyboards into. It's bad to tell people there really isn't a need to consider PS/2 over USB when there are very clear and important advantages to reviving the work-horse protocol, and as someone who has had to work with USB hardware I absolutely despise how cluttered and bloated the whole thing is from the chips all the way to the kernel USB stack; dealing with it makes everything slower and particularly affects mobile and embedded devices badly (don't forget the use case of USB isn't limited to desktops with enough cycles to make it imperceptible under normal loads). PS/2 certainly had issues, but USB took it all and made it suck then suck faster, and now it sucks fast at much higher amperage for extra fun. I can't wait to see how many OEM PSUs fail when the charging ports proliferate on prebuilts and laptops that should never have them and some cheap device actually tries to pull 2.5 or 5A out of a common Dell or HP. (For even more fun, imagine what all that rippling on the USB power rails is and/or can do to all the devices on the bus!)

@bradsmith1934

5 жыл бұрын

@@ElenraiSame here only HP PS2 Keyboard & Tracking Ball Mouse, & 1995/96 HP Pavilion Monitor w/ built-in Amplified Loudspeakers. Used everyday, no issues. I also have a Gen 2 Microsoft Mouse. It's kinda slow, but still works without issue.

@Elenrai

5 жыл бұрын

@@bradsmith1934 man you made me remember my old Logitech mouse, I wonder if modern trackballs exist...

some programs, like Acronis True Image boot disk (depending on the version) will not detect a USB mouse/keyboard but works fine with a PS/2 mouse and keyboard. Also, some motherboards, for whatever reason, will not allow you to gain access to the BIOS without a PS/2 mouse. Those are the reasons I still have a PS/2 keyboard and mouse.

Yeah, I'm not turning back to times when I couldn't use up-down-left arrow keys at the same time. It work for up-down-right though. So I was only able to start drifting to right easily in Trackmania.

PS/2 ports are also more secure than usb ports

@James-qd3mw

6 жыл бұрын

Patrick Neary explain

@jemand771

6 жыл бұрын

what do you mean by "secure" ?

@BigHeadClan

6 жыл бұрын

James TheGamer usb devices need to have signed drivers associated with them when connected. You can inject malware or tell a system to get fake drivers which can then grab viruses and such. Which is why you should never use a USB key that you found on the ground.

@patrickneary6960

6 жыл бұрын

Usb ports can be used for other things such as flash drives so things that have a USB port can put unwanted files onto your computer. Ps/2 ports will not allow files to be transferred. This is why IT workers and government buildings will use ps/2

@jemand771

6 жыл бұрын

There always is a workaround. You could just emulate a PS2 keyboard, and your done. This is like BasUSB but with ps2 edit: so if you're afraid of USB ports, then better not use computers at all :b

This comment was typed on my IBM PS2 Model M mechanical keyboard on Windows Vista Ultimate SP2, and a TinyTech PS2 mouse.

@thefrench8847

5 жыл бұрын

Those ps/2 port look badass and colorful

@robintst

5 жыл бұрын

This reply was typed on my IBM PS/2 Model M mechanical keyboard. We are more numerous than people think. :D

@jumbo_mumbo1441

5 жыл бұрын

I was with you until "Vista." Why

@xheralt

5 жыл бұрын

I still have a M$ bus mouse card and mouse, worked last time I tried it years ago, I just can't find a mobo with an ISA slot any more to plug it into.

One thing that I love about PS/2 is that you don’t have to use up any of your USB ports and having to buy adapters for more of them to get more extensions or accessories.

1:52 I love it when Linus does those things 😂

I like how he tries to cover the connector of the Mouse thinking we wouldn't notice that it was a USB Mouse with a PS/2 adaptor.... >_>

*Pretty much, yeah.*

@potatonite2340

6 жыл бұрын

ye stfu

@Horizon-jq6bf

6 жыл бұрын

yup, even with a solid 240 fps, 1ms polling is roughly 4 times faster than the monitor refresh rate

@yes-zs3yw

6 жыл бұрын

i cant tell 40 fps from 60 fps

@Yamama288

5 жыл бұрын

Potatonitep

4:45 This is an AT Model M 1390131 keyboard. Didn't come with a PS/2 cable, but rather the older big black 5 pin plug. Those plugs used to be standard on motherboards before PS/2 ones up until the mid '90s, like up until the Pentiums took over. Many a classic 486 these days for retro rigs. But I digress. Since it's an AT at least and not an XT, you could probably just swap out the cable for a PS/2, if you wanted.

@someguy4915

Жыл бұрын

The big 5 pin connector 'DIN' is the normal variant, PS/2 uses a 6 pin 'mini DIN' connector. They use the same PS/2 protocol, the only reason the smaller mini-DIN has 6 pins is to (optionally) combine both the mouse and keyboard signals into a single connector with some motherboards. By default both DIN and Mini-DIN PS/2 connectors only use 4 of their pins.

By god this is the best techquickie episode so far

Turn on your volume at 1:53 it's very hard to hear it.

Watching this years after it was produced and wow Linus you have improved so much with your company

3:59 I seem to have had this prob. All I did was disconnect all the peripherals (with pc powered off) so I could take my tower over to my air compressor for a dust cleaning. Reconnected everything and the ps2 keyboard is the only thing it won't recognize now. I get one momentary flash of the keyboard lights when I plug it in, then nothing. Tried plugging in when computer was shut down first of course

3:14 I have had the opposite issue. I am trying to use an old ps2 keyboard on my system which is an older system but not too old, and my ps/2 keyboard will work in the bios but will not show up in the bios. And the keyboard doesn’t work in windows. I am very confused by this and am looking for answers.

This comment was typed on a PS/2 keyboard

@kaelevi7701

6 жыл бұрын

Jorno this comment was typed on an iPhone touch screen

@marxk4rl

6 жыл бұрын

This comment was typed on a toilet seat.

@amagiccarpetgaming5352

6 жыл бұрын

i used a ps/2 keyboard for years that was made for windows 2000, it was warped, and years later the top row of numbers stopped working but it was definitely "ole faithful" for anything that needed repaired

@qwertyuiopzxcfgh

6 жыл бұрын

Jorno This comment wasn't typed, I used voice to text.

@mhammadalloush5104

6 жыл бұрын

This comment was typed on a touchscreen

PIFFFF PS/2.. SERIAL PORT, MASTER RACE!

@jeffqueen9999

6 жыл бұрын

REDCOW34 dam son....

@Ghgore_

6 жыл бұрын

REDCOW34 You're forgetting Parallel ports xD

@34REDCOW34

6 жыл бұрын

Ohh Shitee :/

@MrHack4never

6 жыл бұрын

*_SERIAL NEVER DIES_* On a serious note: Most digital interfaces are serial nowadays

@5frogfrenzy

6 жыл бұрын

REDCOW34 shadilay brother! praise kek!

I got a Fanatec CSR racing wheel in 2012, that thing still used ps/2 to connect the pedals and shifter to the wheel rather than Ethernet style cables that my newer thrustmaster uses Both still connect to the system via usb though...

@Beybladeawsomeness

4 жыл бұрын

Although the thrust master does have a breakaway before the usb that utilizes ps/2

For GPS devices with USB connectors used today (March 24 2020) I have to use a special driver that handles the USB connection as a serial one so that my GPS receiver used for timing purposes works well.

I recently got my hands on an old Model M keyboard for free... It was gonna get thrown away at my University... So I snatched it :P

@jeffsabados8075

4 жыл бұрын

Rourke Hikari Wow. Score.

@someguystudios23

4 жыл бұрын

They are too expensive for my liking, good find!

PS/2 pins are plenty durable. In my 5 years of plugging and replugging connectors when swapping computer towers, I've never damaged the connecter pins. Well all I typically use are 15 years and older keyboards anyway. So they are of course built better than modern keyboards.

@tacosatlarge

7 ай бұрын

Never had a problem too, provided you aren’t too rough with plugging it in. My keyboard is from 2003.

wow! it's the best ever comparison of 2 ports! maaan, please go on! I did not know they are so different.

I once had a box that would convert IDE to LPT, very useful back in the day.

I can Turn On my PC using PS/2 Keyboard...

@ehsan74827

6 жыл бұрын

James Valentine how?

@agoiagoi9356

6 жыл бұрын

Great for you, I can do the same with an USB keyboard using my UEFI mainboard. It's nothing special

@MkwRa

6 жыл бұрын

Same

@keithbrown7685

5 жыл бұрын

I can turn on my pc just by opening my trench coat.

@carazy123_

5 жыл бұрын

I can turn on my PC just by looking at it ...and then pushing the power button

Make a gasoline powered PC build! Motor must be in case.

@Biker_Gremling

6 жыл бұрын

David Summers Yeah, but make it V8. Because everything is better with a V8.

@Oi-wz2dq

6 жыл бұрын

Do you know how computers work?

@anshul9856

6 жыл бұрын

Oliver Kavanagh on electricity?

@qwertyuiopzxcfgh

6 жыл бұрын

I once powered a pc with a diesel generator to play some music on a beach party. Is that close enough, or does it really have to be gasoline?

@boonies4u

6 жыл бұрын

Oliver Kavanagh do you know how alternators work?

Direct memory mapped IO is the new standard from what I understand. Polling died with interrupts and from what I understand it is certainly possible for a USB mouse to send an interrupt in a modern OS if the OS can understand it and the USB device has well written and current drivers. Memory Mapped IO works by simply giving the USB device direct access to say an 8 byte chunk of memory. Whenever the mouse needs do do anything it writes data to this memory segment and then places an interrupt in the CPU interrupt queue to tell the CPU to act on it. The CPU then picks from the work list in the queue. Works much faster and better depending on system load and doesnt waste CPU cycles.

@someguy4915

Жыл бұрын

USB does not have a way for a device to send an interrupt, ever. It physically does not support that so even if the OS supports it, the hardware cannot. The only way for USB to cause an interrupt would be for the CPU to poll the keyboard/mouse, process the data and then have the CPU throw an interrupt for no reason. Memory mapped IO is a general term in hardware, as of USB4 this is not supported nor has it been. The functionality you describe is basically how USB works, a device is polled, the response is stored in memory and the CPU processes it. I have not ever seen a USB controller that has an interrupt signal output, so this is purely timed by the CPU.

Good wit and presentation of information

I have desktops with hot swappable PS/2 ports. Pins don't bend by themselves ;) I'd rather use PS/2 to leave more USB ports open

@silvio.zambon

5 жыл бұрын

I have never heard of hot swapping ps2 and you can use usb hubs to increase your usb ports, they don't slow down the USB transfer speed

@Humaricslastcall

5 жыл бұрын

It's actually been a thing for a while, if a given bios is compatable with it. Plug in PS/2, hear a beep, and it's ready to go. No hassle, no waiting.

@Nobody-eg4bi

5 жыл бұрын

usb hubs may damage your mobo by extra heating or sometimes by static

@SpeedDaemon3

5 жыл бұрын

@@Nobody-eg4bi decent mobos have static protection on all ports, there are usb expansion cards, you can put like 4x usb 3.0 in a pci-e slot.

@Crystan

5 жыл бұрын

@@Humaricslastcall There are very few BIOS's which actually support this though. Mostly because USB has become so prevalent that there's simply no need to even include a PS/2 port, much less provide additional functions for it. Systems often come with more USB ports than most people will ever need to use. I have USB ports on the front, on the back and on the top of the machine. Of which I use about 6 at most, and that's if I'm using the Occulus Rift (3x USB 3.0 for Occulus, 1x Mouse, 1x KB, 1xGamepad). I still have another 6 unused ports in total. Mileage will differ for everyone, I guess, but for most people USB is more than sufficient.

The fact that ps/2 is not hot swappable is a major pain. Many people are caught by this. The number of times that I've had to tell people to turn off their computer, unplug the mouse/keyboard, plug it back in again, then turn the computer back on. If I had a nickel... Also, with the lovely Windows 10 fast startup feature, ps/2 peripherals are often not detected. Grrr

A couple years back all the USB ports on my mobo and case stopped working but the ps2 still worked. This video finally explained it for me lol. I shorted my my mobo by bending back a usb3 pin which made my machine unable to request data, whereas the ps2 just passively sent data which let it still work.

I do have a problem with rollover. I can out type my keyboard on a regular basis. The latency on the keyboard causes missed key-presses and sometimes duplicate key-presses.