The Great Keyboard N-Key Rollover (NKRO) Test/Round-up

The quick brown fox jumps over the lazy dog... no "RIGHT" necessary in the sentence.

he quik brown fox jumps ver he lazy dog

Microsoft Sidewinder X6
 
he quik brown fo jups oer he la dog - Dell Inspiron 8600

the quick brown fox jumps over the lazy dog - Logitech K340 Wireless
 
Standerd USB Dell keyboard
HE QUIK BROWN FO JUPS RIGH OER HE LA DOG
 
XArmor U9BL

right shift + left shift + caps key pressed:
the quick brown fox jumps right over the lazy dog
 
THE QCK BRWM X JM RTH VER THE LZ

Positively ancient buckling spring chicony 5161 with an AT - PS2 - USB converter.

Will repeat when I get my SpaceSaver 104/105 from pckeyboard.com.
 
What a stupid test. Don't everybody go out and buy a Logitech G19 or K340. Or a Microsoft comfort curve for that matter. The $150+ Logitech G19 passes the test because they routed the switch matrix a bit differently. It'll fail on other combos. Same with the other rubber dome non-Nkey keyboards passing this test.

For a complete listing of Nkey keyboards see this Listing of Nkey Keyboards (and the sorry tale of keyboard manufacturers that lie about it).
 
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Caps Lock and both shift keys held down:

the quick brown fo jumps over the lazy old dog

Microsoft Digital Media 3000, USB, $25, eat it. :p
 
It IS a lot easier to just look up your keyboard on this list of NKRO keyboards.

If it is not there then it is 2KRO.

Only thing this test tells you is how the engineer decided to layout the two shift keys into the keyboard matrix.
 
HE QUIK BROWN FO JUPS RIGH OER HE LA DOG

Logitech Wave (wired) USB keyboard
 
te uic rwn jus rigt ver te lay dg
TE UIC RWN JUS RIGT VER TE LAY DG

Microsoft Natural Elite (PS/2) - wow, none of "fox" even made it in.
 
TE UIC RWN JUED VER TE LAY DG

NMB Technologies keyboard. Made in like 1999.
 
HE QUIK BROWN FO JUPS RIGH OER HE LA DOG

Genius KB-220e

If I press the CapsLock+LShift+RShift keys, then nothing....... :D
 
HE QUIK BROWN FO JUPS RIGH OER HE LA DOG

T C X M T V T ZY are the ones that didn't work

Probably since Z X C V and M are all on the bottom row. Not sure why B and N worked worked, though - maybe because they are in the center?. Or why T and Y didn't work.

Keyboard is a '97 PS/2 IBM Model M.
 
Probably since Z X C V and M are all on the bottom row. Not sure why B and N worked worked, though - maybe because they are in the center?. Or why T and Y didn't work.
Click to expand...

Because it depends on how the matrix is laid out.

This is ALL this test shows.
samcoupe-membrane-full.jpg


Stupid test since a bunch of keyboards pass this and yet are NOT NKRO.



Please review the brand new Geekhack Mechanical Keyboard Guide if you would like to learn about how keyboards work.
 
Ripster55 said:
Because it depends on how the matrix is laid out.

This is ALL this test shows.
http://velesoft.speccy.cz/samcoupe/keyboard/samcoupe-membrane-full.jpg

Stupid test since a bunch of keyboards pass this and yet are NOT NKRO.



Please review the brand new Geekhack Mechanical Keyboard Guide if you would like to learn about how keyboards work.
Click to expand...

Seems kind of pointless of a test then. The board I did it on was a buckling spring mechanical keyboard, and it couldn't do it. However, my laptop scissor keyboard can.

Does it really matter? I've been using the IBM Model M for like six years, and never had ghosting issues.
 
THE NEIGHBOURS COMPLAIN ABOUT MY ALPS

Nan Tan KB-6251EA swapped to Alps blues. Built before dogs got too lazy to eviscerate foxes, when there was never a reason to hold down the caps lock and both shift keys at the same time, not that it's even a reason now.
 
HE QUIK BROWN FO JUPS RIGH OER HE LA DOG

Lexmark Model M 1398601, both shifts

(absolutely nothing)
The same keyboard, Caps lock held down along with both Shifts.
 
Northgate Omni Key / Ultra GT06OMNIKEY ULT2

dual shift:
THE QUICK BROWN FOX JUMPS RIGHT OVER THE LAZY DOG

dual shift + caps:
the quick brown fox jumps right over the lazy dog
 
HE QUIK BROWN FO JUPED OER HE LA DOG

Gateway Anykey keyboard (1993), AT Model
 
HE QUIK BROWN FO JUPED RIGH OER HE LA DOG

Compaq MX-11800 cherry brown mechanical ps/2 keyboard.
 
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