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post #11 of 22
Basically, key "ghosting" is when multiple keys are pressed. The proper term would be "rollover". USB keyboards are usually pretty limited to how many keys can be pressed at once. PS/2 has n-key rollover which lets you press all keys at once. I'm not sure if every PS/2 keyboard has n-key rollover but I know that many do, and no USB keyboards can do this.
post #12 of 22
Quote:
Originally Posted by -Allen- View Post
thanks! +1 time to buy this keyboard
No problem

Just in case you're interested, here is a good explanation of PS/2 vs USB from the guys over at steelseries

Quote:
We absolutely recommend using the PS/2 connector when possible. First,it will give you total freedom with no limit to the amount of simultaneous key presses. And, equally as important, using the PS/2 may just improve your overall gaming experience. The reason is that when you use a USB keyboard your computer is actually using CPU time polling your keyboard. The higher the polling rate the more CPU time is used to perform the polling. And because of the built-in debounce rate found on any quality keyboard, any polling rate above 200Hz is simply a waste of CPU time and really just a result of pointless marketing hype. Unlike USB keyboards a PS/2 keyboard isn’t polled at all. The keyboard simply sends a signal to the computer as key presses are made, which causes a hardware interrupt, forcing the CPU to register the signal.
    
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post #13 of 22
Check out the i-rocks keyboards to.
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post #14 of 22
I honestly don't know why USB keyboards are so popular, interrupt is a much better input method for a keyboard.
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post #15 of 22
Im sure it technically is but I doubt you'd ever notice.
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post #16 of 22
True so I'm assuming they decided that the hotswapability of USB mattered more. I like being able to start my computer from my keyboard though
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post #17 of 22
PS/2 sucks but I also recommend the RK-800G.

All the AntiGhosting of a Logitech G series at less than 10% the cost.
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post #18 of 22
Most PS/2 keyboards do not have N-key rollover. The majority of PS/2 boards are limited to 2-key rollover since they're membrane designs. (when describing rollover or the number of keys you can simultaneously press and register, you generally use the lowest possible rollover.)

However, N-key rollover is possible on PS/2 if your keyboard supports it, which generally requires either capacitive switches or mechanical switches with diodes under every key. If you have a board that supports N-key rollover, you can hold down all 104 keys and have them all register.

USB by comparison is limited to 6 keys at once plus a few modifiers (Shift, Ctrl, Alt, etc.) Most USB keyboards again are 2-key rollover due to matrix limitations.
http://www.microsoft.com/appliedsciences/AntiGhostingExplained.mspx
post #19 of 22
That's nice but my point is both the $100 Logitech G series and $10 Newegg Rosewill Ghetto Series have gaming optimized clusters.

It doesn't cost much to implement.

From the Nkey Wiki entry under Gaming Optimized Keyboards for Rosewill RK800G:
Quote:
Quote:
These can all be pressed at once
Quote:
Q, W, E, A, S, D, space, up, left arrow, right arrow, down
Think of it like buying a $15 Topre WASD set and getting the keyboard for free.


Edited by ripster - 5/24/11 at 2:27pm
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post #20 of 22
lol hilarious. everyone on ocn basicly things ps2 is far superior to usb. where at geekhack its just the opposite
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