this post was submitted on 04 Aug 2024
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Memes

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Laittakaa meemejä tänne.

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[–] [email protected] 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

[–] [email protected] 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.

[–] [email protected] 49 points 3 months ago (1 children)

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

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

[–] [email protected] 7 points 3 months ago

Interesting I did not know that.

[–] [email protected] 3 points 3 months ago (1 children)

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

[–] [email protected] 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.

[–] [email protected] 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.

[–] [email protected] 18 points 3 months ago (1 children)

USB does not have that limitation.

[–] [email protected] 10 points 3 months ago (3 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.

[–] [email protected] 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

[–] [email protected] 3 points 3 months ago

Welcome to now!

[–] [email protected] 3 points 3 months ago (1 children)
[–] [email protected] 7 points 3 months ago (1 children)

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

[–] [email protected] 2 points 3 months ago

What's the use for that?

[–] [email protected] 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.

[–] [email protected] 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

[–] [email protected] 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...

[–] [email protected] 1 points 3 months ago

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

[–] [email protected] 26 points 3 months ago (2 children)

Dude just switch to vim already

[–] [email protected] 4 points 3 months ago

Dude, just switch to Webstorm already

[–] [email protected] 4 points 3 months ago (1 children)
[–] [email protected] 6 points 3 months ago

Idk but Doom runs pretty well

[–] [email protected] 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.

[–] [email protected] 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.

[–] [email protected] 2 points 3 months ago (1 children)

USB supports NKRO as well as the default 6KRO.

[–] [email protected] 1 points 3 months ago (1 children)

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

[–] [email protected] 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

[–] [email protected] 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.

[–] [email protected] 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.

[–] [email protected] 1 points 3 months ago

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

[–] [email protected] 8 points 3 months ago

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

[–] [email protected] 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.

[–] [email protected] 2 points 3 months ago* (last edited 3 months ago) (2 children)

Ok, but why would you ever? Genuinely curios.

[–] [email protected] 8 points 3 months ago (1 children)
[–] [email protected] 1 points 3 months ago

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

[–] [email protected] 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.