Is PS/2 or USB Better for Keyboards and Mice? 

never found the 'any key' :(

Ikr it funny cause it not there

or just click a mouse button? plot twist

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...

Beaker those were the (bad) days

Yes

alpha peripheral 😂

I love this.

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

FUCK YEAH!

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

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.

we'll put valve right on it.

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

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

Wow!

Really!? Or are you joking?

Your photo's link please

He is joking lmfao

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

Zared Martorana proof that USBs exist in 4 dimensions.

Zared Martorana 1 year 1 month 1 day ._.

lmao

nice

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!!!!

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

Ash Ketchum LOLLLLL

LinusSexTips 😂

Lol

+Specter Oh shut up...

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

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

@@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

@@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.

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

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

the difference wont be visually perceptible probably

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

I agree!

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

Thats some usefull info

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

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.

@@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.

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

Valid

i am with you man thats right

Amen.

USB expansion bays

But why not _both_ ?

on the keyboard

@@Deaft_shot i was looking at the monitor

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)

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

Nice Simpsons reference 🤣

stil waiting.....

But the CPU never wrote back...

"Right click" -Last online 69 years ago

Notice me CPU-senpai!!

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

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.

Also latency doesnt even exist on it

Oh good.

keep dat boi cool

That would be pb for 'petabyte'

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

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

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

Wouldnt that be amazing

Viral Dev a good idea from a very good boy

Pros and cons to everything in life really.

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.

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

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

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.

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

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.

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.

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.

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

Major oof Well at least LTT dumped tunnelbear

I use turbo vpn

@@Ultimateharen I really like ExpressVPN myself.

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

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

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

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

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

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

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.

i luled

Well, he _is_ a dad.

thats no excuse...

So puns are called dad jokes nowadays.

^Duck Only very bad puns.

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

Then I suppose you should get tunnelbear

Lol

Lmfaoooo

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

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

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.

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

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

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...

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

Do you still get nkey rollover this way?

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

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.

Tyler Dietz so what games do you have ?

Nothing lol

Hes too young

@@sukecchizu because its modern motherboard

Snag

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

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.

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

and how do u do that shit

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

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

@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.

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

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

@@kalijasin stfu

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

Broken Bucket Yeah same at my old school too.

Francisco Santos maybe.....😂

My ps2 keyboard uses all schools

My uses school all ps/2 keyboards.

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

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

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.

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"

@@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.

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

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

geo58impala Optical mice are even better

I only use optical mice if I can.

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

Creeper 34lol your keyboard should be worth a few hundred

Windows 7 4 life.

@@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.

Well you cannot use them no more as PS/2 don't exist anymore hence that is why all modern day devices use USB as USB is much more durable and robust

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Kpnd4OVf7oo.html

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

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

give it to lil pump that ugly keyboard

get it? hahah

*deep*

Lmao

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

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

Darian Mccants I see what you did there

Darian Mccants I don't. What

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.

Micky strange to find a Russian time here

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

I had an issue with an error log file somewhere, endlessly filling itself and creating new ones until the drive was full. CPU sat at 90%. Went for a total reinstall, drive died. New drive was perfect, but the mb didn't recognise USB devices. I had to raid the parts bin in the loft for a 20 year old PS/2 keyboard!!

Yes, on my 2014 Dell laptop. Keyboard and trackpad failed during that shitass Windows 8.1 install process. Had to use the touch screen, which functioned. Gee, I wonder what that OS was made for...

Private Custard Yes, by using a touch screen. Hee hee, hoho hahahahahahahaha *HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAA!*

You can't though with Linux you still have to option of SSH or connecting to the serial port.

All versions of windows have a addon that come with USB drivers so that doesn't happen

TheBodyOnPC USB C

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.

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

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

Coaxial

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.

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)

@@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.

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

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

@@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.

James Valentine how?

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

Same

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

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

Same here. The Model M is just awesome!

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.

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

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 )

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

FLEX TAPE!!!

How about a little more? BUCKET

Patrick Neary explain

what do you mean by "secure" ?

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.

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

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

David Summers damn

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

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.

Amen

A serial mouse? Sir, you make me proud!

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.

Xd

Same here

Those ps/2 port look badass and colorful

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

I was with you until "Vista." Why

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.

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

Linus is a '90s throwback.

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).

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.

VWestlife It's brilliant always seeing you around RU-vid.

REDCOW34 dam son....

REDCOW34 You're forgetting Parallel ports xD

Ohh Shitee :/

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

REDCOW34 shadilay brother! praise kek!

Rourke Hikari Wow. Score.

They are too expensive for my liking, good find!

Kev G sir what year do you think it is

@@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!

@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!)

@@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.

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

savage

sure you are XD

i think you're new catface

They call you Macgyver

There are free vpns that work just as well as TunnelBear

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

but that's digital audio, gross!

Thays primerly for TV equpment use as, your monitor wont need internet connection and ethernet cables are a lot cheaper

USB always "has" (Well, not 100% sure on some early 1 versions.) It's not really an interrupt though as in having the CPU jump to the interrupt handler. More of a reduce the latency thing. Basically what an interrupt does in USB land is to make the host request data from the client in one of the frames. Which are 1 millisecond (1000 us). USB 2 introduced and 3 keeps microframes which are 125 microseconds (125us). So a USB "interrupt" will cause it to issue a request to the client, which will then send it, when it schedules it. Ideally this should be the first packet, but there can be other interrupts, and I think isochronous (which is reserved blocks) can also bump that, ignoring that for the moment (as I can't 100% recall what the spec says). I don't think it has to be scheduled first either. It can request anything from 1*125us to 15*125us. (Note: Host not required to give it to them.) If the data is particularly small it might fit into the interrupt packet, in which case it doesn't need to be scheduled, but still has to wait for the next (micro)frame. (Up to 1000/125 us) It's also why for any sort of real time, in the us range, something like a microcontroller or fpga is highly preferred. Even the old fashioned ECP port's latency is several orders of magnitude better, the port's latency is .4us (400ns) for a byte. Which is why for things like CNC it can be used but USB can't directly be. (At least not fast or without a smart device like a microcontroller or fpga on the other end.) For a keyboard? Frankly Millisecond is fine for pretty much anyone. Same thing for a mouse. Maybe Data would have an issue with that. How fast can people process and react? It kinda depends, but given that (very simplified) visual perception seems to be limited in even the edge cases to ~250 Hz or 4 milliseconds, 4000us, or 4-32x longer than USB would generally take.) For the cited example of CNC. It matters. You are giving it steps and if it hit something it shouldn't (ideally a limit switch) you want it to shut down *now*. Unless you like bad things happening, like ruining things which cost from tens to tens of thousands of dollars (or more) to fix, and possibly sending (also expensive) shards of metal flying out at very high speed. (Mind you, that'd likely have at least a microcontroller on the other side of the USB connection.) (Note that there's additional overhead for processing, and transfers be they ancient 8-bit ISA, PCI, PCI-Express, USB setup, or other processing. Which if you care that much about things, you probably have a reason to. Same for the note on visual, ignores, the brain processing (which per an MIT study I ran across it had people only processing the image if it was persistent for more than 13ms which is ~75 Hz (but there's edge cases there, where in a dark image, a flash of something for a very short period can be seen.))

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

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.

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

@@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.

@@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.

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.

Years ago our office IT people swapped out our department's IBM Model M keyboards for the newer "better" DELL PS/2 keyboards during an upgrade. I asked IT if I could have the "old" keyboards and they said "sure take them we are just going to throw them out"-I took five Model Ms home that night. I still have them 20 years later and working fine.

+ExWEIMan-- Check out the price on Ebay...you shoulda taken all of them!

Unicomp, Inc. bought the IBM molds and tooling for model M keyboards and still makes the! They sell both USB and PS/2 versions.

The best keyboard ever made, without a doubt.

Model M keyboards are lovely, I have one of the USB ones from Unicomp. However, unless they've changed their trackball tech in the past few years, the atrocious inbuilt trackball on the version I have _really_ isn't worth the extra money. It's some outdated analogue roller design. Still a great keyboard, even if part of it is essentially useless!

ye stfu

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

i cant tell 40 fps from 60 fps

Potatonitep

Jorno this comment was typed on an iPhone touch screen

This comment was typed on a toilet seat.

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

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

This comment was typed on a touchscreen