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.
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.
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…
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
Yeah but try pressing more than 4 keys at once on the PS2 keyboard and get back to me
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.
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.
This, it’s why I still use the PS2 interface. Full n-key rollover is impossible for me to do without.
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.
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…
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
USB is not limited to 10, or 6 as is sometimes stated.
https://www.devever.net/~hl/usbnkro
Interesting I did not know that.
Dude just switch to vim already
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.
USB supports NKRO as well as the default 6KRO.
Historically it didn’t support it though, whereas PS/2 always did.
Historically computers only supported punch cards, it feels weird to only focus on past capabilities. https://www.devever.net/~hl/usbnkro
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.
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.