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[-] dashydash@lemmy.world 234 points 3 months ago
[-] Toes@ani.social 70 points 3 months ago

A bunch of those points about ps2 are no longer accurate, it's emulated on modern computers.

[-] Wizard_Pope@lemmy.world 74 points 3 months ago

Don't tell me they nerfed ps2

[-] dashydash@lemmy.world 22 points 3 months ago
[-] Wizard_Pope@lemmy.world 7 points 3 months ago

Sad days tp ahve a PS2 keyboard ot mouse

[-] JokeDeity@lemm.ee 8 points 3 months ago

Jesus, proofread before hitting send.

[-] x4740N@lemm.ee 4 points 3 months ago

Didn't know jesus was on lemmy

[-] Xenny@lemmy.world 41 points 3 months ago

Yeah but try pressing more than 4 keys at once on the PS2 keyboard and get back to me

[-] e8d79@discuss.tchncs.de 36 points 3 months ago* (last edited 3 months ago)

That is a limitation of the keyboard not PS/2. Unlike USB which is limited to 10 simultaneous key presses, PS/2 supports full n-key rollover.

[-] frezik@midwest.social 49 points 3 months ago

USB is not limited to 10, or 6 as is sometimes stated.

https://www.devever.net/~hl/usbnkro

[-] e8d79@discuss.tchncs.de 7 points 3 months ago

Interesting I did not know that.

[-] Xenny@lemmy.world 3 points 3 months ago

Well I never had a fancy gaming keyboard back in the PS2 days lol

[-] e8d79@discuss.tchncs.de 4 points 3 months ago

How about a fancy IBM keyboard? The Model F from 1981 features n-key rollover. Don't ask me why they needed it at the time though. It probably wasn't important as the Model M from a couple of years later dropped that feature.

[-] blarth@thelemmy.club 3 points 3 months ago

This, it’s why I still use the PS2 interface. Full n-key rollover is impossible for me to do without.

[-] frezik@midwest.social 18 points 3 months ago

USB does not have that limitation.

[-] blarth@thelemmy.club 10 points 3 months ago

Ah, had to dig into it. There was a long period of time during which you couldn’t find a USB NKRO keyboard. Seems that has been fixed.

[-] lud@lemm.ee 5 points 3 months ago

Yeah, pretty much every single keyboard meant for gaming supports NKRO or at least a lot of multi key roll over

[-] Mango@lemmy.world 3 points 3 months ago

Welcome to now!

[-] JokeDeity@lemm.ee 3 points 3 months ago
[-] DannyBoy@sh.itjust.works 7 points 3 months ago

You can press all keys at once and they all register.

[-] JokeDeity@lemm.ee 2 points 3 months ago

What's the use for that?

[-] Theharpyeagle@lemmy.world 7 points 3 months ago

Out of curiosity, what is the practical use of full N-key rollover? I can't think of many things that require me to press more than maybe five keys at a time.

[-] dashydash@lemmy.world 5 points 3 months ago

Used to have these problems when we were children and playing fighting games with my brother with one keyboard or guitar hero clones that need you to press multiple buttons at the same time, that's the only use case I could think of. I don't know if there's any modern software that requires you to mash more than 2 or 3 buttons at the same time

[-] Ephera@lemmy.ml 2 points 3 months ago

Bit of a niche use-case, but I'd like to have it for using my laptop keyboard as a piano keyboard, for basically MIDI input (via VMPK or one of the DAWs with this feature built-in).

There's even certain combinations of just 4 keys, which I simply cannot play...

[-] blarth@thelemmy.club 1 points 3 months ago

If you type really fast, you’ll find it.

[-] intensely_human@lemm.ee 26 points 3 months ago

Dude just switch to vim already

[-] lud@lemm.ee 4 points 3 months ago
[-] embed_me@programming.dev 6 points 3 months ago

Idk but Doom runs pretty well

[-] dashydash@lemmy.world 4 points 3 months ago

Dude, just switch to Webstorm already

[-] drathvedro@lemm.ee 13 points 3 months ago

Nothing to do with the interface. If your keyboard can only do 4 it means that the manufacturer has cheaped out on diodes and couldn't even be bothered to stagger the matrix enough to make you not notice.

[-] dan@upvote.au 11 points 3 months ago

I think you're confusing USB and PS/2. USB has (or used to have?) a limit on the number of keys you could press, whereas PS/2 supports n-key rollover.

[-] JackbyDev@programming.dev 2 points 3 months ago

USB supports NKRO as well as the default 6KRO.

[-] dan@upvote.au 1 points 3 months ago

Historically it didn't support it though, whereas PS/2 always did.

[-] JackbyDev@programming.dev 2 points 3 months ago

Historically computers only supported punch cards, it feels weird to only focus on past capabilities. https://www.devever.net/~hl/usbnkro

[-] dan@upvote.au 1 points 3 months ago

I mean... the post is about PS/2, which is a past capability too.

The site you linked to just shows a blank page for me in Firefox. Works in Chrome though.

[-] JackbyDev@programming.dev 1 points 3 months ago

Works fine for me in Firefox for Android. Weird. Everyday I remind myself how happy I am that I'm not a frontend dev lol.

[-] dan@upvote.au 1 points 3 months ago

Huh yeah, it works on my phone but not on my PC. Not sure why.

[-] AnUnusualRelic@lemmy.world 8 points 3 months ago

Preposterous, I've used emacs on a ps2 keyboard without issues.

[-] morbidcactus@lemmy.ca 4 points 3 months ago

I recall NKRO was the selling point on some of those keyboards, my old steel series mechanical will absolutely let you mash all the keys with a ps2 adapter.

[-] Anarki_@lemmy.blahaj.zone 2 points 3 months ago* (last edited 3 months ago)

Ok, but why would you ever? Genuinely curios.

[-] SkyeStarfall@lemmy.blahaj.zone 8 points 3 months ago
[-] Anarki_@lemmy.blahaj.zone 1 points 3 months ago

Never had issues with it, but fair. Different strokes.

[-] Xenny@lemmy.world 3 points 3 months ago* (last edited 3 months ago)

Try playing a rhythm game on a most PS2 keyboards 😟

Also with certain button combinations it was less than 4. You could only hold 2 arrow keys down at a time.

[-] trainden@lemmy.blahaj.zone 17 points 3 months ago* (last edited 3 months ago)

USB: Many designs and revisions, none of them perfect

Nah, USB 3.2 Gen 2x2 SuperSpeed is the best! And it took me only 30 minutes of reading articles and wiki pages to get that information! ^although^ ^I’m^ ^not^ ^sure^ ^what^ ^USB4^ ^Gen^ ^3×1^ ^is,^ ^but^ ^it’s^ ^only^ ^x1^ ^so^ ^can’t^ ^be^ ^that^ ^good,^ ^right?^

[-] The_Decryptor@aussie.zone 4 points 3 months ago

although I’m not sure what USB4 Gen 3×1 is, but it’s only x1 so can’t be that good, right?

It's the initialisation mode of USB 40Gbps, luckily not something users will have to deal with

[-] JackbyDev@programming.dev 13 points 3 months ago

I know this is a shitpost, but what's interesting is that even though USB doesn't directly interrupt the CPU it's still faster. USB is able to get the entire packet sent before PS2 even sends one. It's very interesting. So if you ever see anyone unironically saying there is less latency call them out!

[-] dejected_warp_core@lemmy.world 9 points 3 months ago

Are PS/2 ports still operating on hardware interrupts these days? I would expect these to be emulated as USB devices at this point, depending on whatever I/O chipset is in play.

The bit about USB asking the CPU is kinda true? My understanding is that it's a packet protocol of sorts, so it's really just writing post-it notes for each button press and leaves them on the CPU's whiteboard for later.

[-] JackbyDev@programming.dev 8 points 3 months ago

Yes, it's true the the USB protocol has to "wait" but it gets the message sent so much faster that it doesn't matter. Still interesting stuff though!

this post was submitted on 04 Aug 2024
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