Here's a pretty good overview of nkey rollover:
http://www.tomshardware.com/reviews/mechanical-keyboard-razer-logitech-gigabyte,3505-6.html
bp
<part15sbs{at}gmail{dot}com>
On 3/30/2015 7:39 AM, Simon Westlake wrote:
You need a keyboard that advertises full NKRO. This will allow an
infinite number of keypresses to be sent. I personally use
http://www.maxkeyboard.com/max-keyboard-blackbird-tenkeyless-tkl-cherry-mx-backlit-mechanical-keyboard.html
but I like mechanical keyboards and ten key less boards. There are
cheaper keyboards with full NKRO.
From Wikipedia:
Certain high-end keyboards have "/n/-key rollover". This means that
each key is scanned completely independently by the keyboard hardware,
so that each keypress is correctly detected regardless of how many
other keys are being pressed or held down at the time.^[3]
<http://en.wikipedia.org/wiki/Rollover_%28key%29#cite_note-TechWeb-3>
Most music keyboards use isolation diodes in theirkeyboard matrix
<http://en.wikipedia.org/wiki/Keyboard_matrix_%28music%29>to implement
full/n/-key rollover (sometimes abbreviated NKRO), making them immune
to both key ghosting and key jamming.^[4]
<http://en.wikipedia.org/wiki/Rollover_%28key%29#cite_note-dribin-4>
However, to reduce cost and design complexity, most computer keyboards
do not isolate all keys in this way. Instead, they use a matrix of key
switches, without any isolation diodes, that assumes that only a
limited number of keys will be held down at any given time. With these
keyboards, pressing as few as three keys can cause ghosting
effects,^[4]
<http://en.wikipedia.org/wiki/Rollover_%28key%29#cite_note-dribin-4>
although care is taken when laying out the matrix arrangement that
this does not happen for common modifier key combinations.
On 03/29/2015 09:18 PM, Josh Luthman wrote:
I never liked those as much as PS2 Logitech's I used entirely before
this one. They did have the problem, though...
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Mar 29, 2015 10:13 PM, "TJ Trout" <t...@voltbb.com
<mailto:t...@voltbb.com>> wrote:
I use a standard dell usb keyboard for gaming and it works great.
Like $15 new on ebay and it's one of the best keyboards I've ever
owned
On Mar 29, 2015 6:59 PM, "Josh Luthman"
<j...@imaginenetworksllc.com
<mailto:j...@imaginenetworksllc.com>> wrote:
Personally I wanted PS2 only keyboards for the longest time
because it always worked. Even up to XP I found issues with
USB keyboards (gone with 7 and 8).
The PS2 keyboards I had most definitely had the problem
you're talking about. Definitely in UT2004 where it was VERY
noticeable. I believe this G19s is my first USB keyboard as
far as I can recall.
Josh Luthman
Office: 937-552-2340 <tel:937-552-2340>
Direct: 937-552-2343 <tel:937-552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Sun, Mar 29, 2015 at 9:54 PM, Nate Burke
<n...@blastcomm.com <mailto:n...@blastcomm.com>> wrote:
That's what I saw, it was something about the groups of
keys that they put into the same 'read' pattern. So you
can't have multiple keypresses from the same 'group', but
USB had a limit of 6 simultaneous events. Some high end
keyboards get around that by having a Hub built into the
keyboard, and presenting it to the OS as 2 keyboards so
they can get 12 events. PS2 did not have this
limitation. There seems to be a ton of bad information
floating around though.
This PC Came with a USB Keyboard that's still in the
box. Maybe I'll put that out and try it.
On 3/29/2015 8:46 PM, Josh Luthman wrote:
The bus has nothing to do with what key combinations you
can or can not push. It's in the keyboard itself. At
least that's what my research told me.
I've used the G19s for quite some time, but honestly the
only PC game I've played in the last ~12 months is
Diablo 3. I absolutely love this keyboard for
everything else, if that helps.
Josh Luthman
Office: 937-552-2340 <tel:937-552-2340>
Direct: 937-552-2343 <tel:937-552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Sun, Mar 29, 2015 at 9:36 PM, Nate Burke
<n...@blastcomm.com <mailto:n...@blastcomm.com>> wrote:
I've acquired a new PC which is better than my old
box, but It doesn't have any PS2 ports on it. I've
always used a PS2 Keyboard for gaming, but now have
to use a USB to PS2 adapter, and I'm running into
what I guess is called 'N-Key' Issues. Apparently
this is an issue with USB Keyboards where only a
certain number of keys (or combinations) can be
pressed at the same time. It seems like PS2 doesn't
have these problems. There are many many sites on
it, and lots of talk about fake reviews/ bad specs
for keyboards.
So, Anyone here have a recomendation for a good
Gaming keyboard (USB) that doesn't cost $100's? Or
is there a special USB to PS2 adapter to use? I
just loaded up one of my racing games, and found
that I can't accelerate turn, and hit the Ebrake at
the same time.
Nate
--
Simon Westlake
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