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[Official] Mechanical Keyboard Guide - Page 789

post #7881 of 14566
let me get my 486dx out.
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post #7882 of 14566

From the OCN Guide

Quote:
PS/2 or USB?
PS/2 wins on three fronts: First, it supports full n-key rollover. Second, PS/2 keyboards aren't polled, but are completely interrupt based. And third, it is impossible for it to be delayed by the USB bus being used by other devices. There are two types of USB transfer modes - the interrupt transfer mode (USB polls keyboard, when key is sensed the USB controller sends the interrupt to the CPU), and the isochronous transfer mode, which reserves a certain amount of bandwidth for the keyboard with a guaranteed latency on the bus. Unfortunately, there are absolutely no keyboards made that use the latter, because special controllers would have to be used, thus making it cost prohibitive.
From the HardForum Mechanical Keyboard Guide

Quote:
When purchasing a mechanical keyboard always choose the PS/2 version over the USB version. PS/2 offers infinite N-Key rollover while USB only offers 6 key rollover with 4 modifiers. If you need a USB connector for your PC, purchase an "Active" PS/2 to USB converter. Non-active PS/2 converters do not properly transmit all data from mechanical keyboards. You can find one here (Used with the IBM Model M Keyboards):
http://www.clickykeyboards.com/index...id/0/id/124184
I would never get a PS/2 keyboard if given the choice of USB or PS/2. It's 2010 people!!!

I don't get the whole polling/interrupt argument when it's the OS/Application/Internet doing 99.99% of the latency damage. 6KRO is fine unless you are into Asian two handed music games And that theoretical Isochronous Transfer mode was fascinating but irrelevant.
Edited by ripster - 9/20/10 at 8:43am
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post #7883 of 14566
Stepmania is awesome. I should try it again now that I have a mechanical keyboard
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post #7884 of 14566
Quote:
Originally Posted by ripster View Post
From the OCN Guide



From the HardForum Mechanical Keyboard Guide


I would never get a PS/2 keyboard if given the choice of USB or PS/2. It's 2010 people!!!

I don't get the whole polling/interrupt argument when it's the OS/Application/Internet doing 99.99% of the latency damage. 6KRO is fine unless you are into Asian two handed music games cue up StepMania Caramelldansen!!!
And that theoretical Isochronous Transfer mode was fascinating but irrelevant.
Yea I mean my current board has a PS/2 connection on it, but I have no idea if my next one, two, five etc will...
Is it really THAT much better on PS/2? I've used USB for a long time now so I can't imagine I'd be too upset by continuing to use it.
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post #7885 of 14566

I think I finally found a game that would benefit from >6KRO (although it would be trivial to remap that 7th key).

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post #7886 of 14566
I think I am going to try some of these games to see if they can increase my speed.
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post #7887 of 14566
Quote:
Originally Posted by candy_van View Post
Yea I mean my current board has a PS/2 connection on it, but I have no idea if my next one, two, five etc will...
Is it really THAT much better on PS/2? I've used USB for a long time now so I can't imagine I'd be too upset by continuing to use it.
If you are implying that Keyboard Manufacturers have been lying to Gamers for years about the need for NKRO versus a guaranteed 6KRO on a convenient modern interface like USB I'm shocked.

Simply SHOCKED!!!
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post #7888 of 14566
Hey, ripster, I asked this before but never really got a conclusion. Any idea what Unicomp's keyboard covers are made out of?
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post #7889 of 14566
I've been told by the forum moderators to stay on topic and since this 7894 post thread is about the Mechanical Keyboard Guide I'll restrict my comments to the Original Post.
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post #7890 of 14566
he wants to know if it's worth $10.
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