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[-] 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

[-] 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?

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

Welcome to now!

[-] 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.

this post was submitted on 04 Aug 2024
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