this post was submitted on 04 Aug 2024
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Memes

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[–] Xenny@lemmy.world 41 points 3 months ago (7 children)

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) (3 children)

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 48 points 3 months ago (1 children)

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.

[–] blarth@thelemmy.club 3 points 3 months ago (2 children)

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 (1 children)

USB does not have that limitation.

[–] blarth@thelemmy.club 9 points 3 months ago (2 children)

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

[–] JokeDeity@lemm.ee 3 points 3 months ago (1 children)
[–] DannyBoy@sh.itjust.works 7 points 3 months ago (1 children)

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 (3 children)

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.

[–] Xenny@lemmy.world 3 points 3 months ago (1 children)

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.

[–] intensely_human@lemm.ee 26 points 3 months ago (2 children)

Dude just switch to vim already

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

Dude, just switch to Webstorm already

[–] lud@lemm.ee 4 points 3 months ago (1 children)
[–] embed_me@programming.dev 6 points 3 months ago

Idk but Doom runs pretty well

[–] 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 (1 children)

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 (1 children)

USB supports NKRO as well as the default 6KRO.

[–] dan@upvote.au 1 points 3 months ago (1 children)

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

[–] JackbyDev@programming.dev 2 points 3 months ago (1 children)

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 (1 children)

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 (1 children)

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) (2 children)

Ok, but why would you ever? Genuinely curios.

[–] SkyeStarfall@lemmy.blahaj.zone 8 points 3 months ago (1 children)
[–] 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.