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[Official] Mechanical Keyboard Guide - Page 1289

post #12881 of 14551
Quote:
Originally Posted by Saberfang View Post
I don't think that matter. If the problem is the polling than a memory stack where the keys pressed are pushed waiting for the next reading should solve it. For what I know when it come to ghosting you have to optimize the keys connection grid to avoid signals to overlap. The best way should be using diodes but if that is the solution then I don't get why that work with ps/2 and not with usb.
I guess cause hardware interrupt always comes first and always gets through.
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post #12882 of 14551
Hah! You should see what Windows does next.

It sits. And thinks.
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post #12883 of 14551
Quote:
Originally Posted by cmdrdredd View Post
I guess cause hardware interrupt always comes first and always gets through.
Ok, but in the keyboards list in the first page of this thread you can see models that support ps/2 but have only 2kro so hardware interrupt doesn't seem to matter not alone at least.
post #12884 of 14551
Quote:
Originally Posted by Saberfang View Post
Ok, but in the keyboards list in the first page of this thread you can see models that support ps/2 but have only 2kro so hardware interrupt doesn't seem to matter not alone at least.
It's because of the way that USB handles packets.

One method for achieving NKRO over USB is to fake it, like the keyboard is actually multiple keyboard. Das tried this in the past, and there was ghosting issues. Noppoo & Ducky tried this as well, and their were problems with OS-X compatibility.

Ducky's newer DK9008-G2 Pro & Leopold keyboards use the alternative method that Microsoft used on the Sidewinder X4 where they report more keys per packet. Allowing you to click up to 11 Keys (on most OS's) or on the latest build of Windows 7, 26 keys.
This isn't true NKRO but anything over 9 keys will do, because we just don't have enough fingers to utilize more keys than that.
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post #12885 of 14551
Quote:
Originally Posted by Tator Tot View Post
Noppoo & Ducky tried this as well, and their were problems with OS-X compatibility.
Nobody important cares about OSX, so it's a moot point. It works wonderfully in Windows. ;P
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post #12886 of 14551
Quote:
Originally Posted by HWI View Post
Nobody important cares about OSX, so it's a moot point. It works wonderfully in Windows. ;P
Tell that to graphic artists who use macs almost exclusively. I work in the industry and all our software is Mac. Our CTP server is PC but Heidelberg recommended we use a Mac for the client because it has less issues with page layouts and proofing (color matching). Closed system and all...
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post #12887 of 14551
Quote:
Originally Posted by Saberfang View Post
Ok, but in the keyboards list in the first page of this thread you can see models that support ps/2 but have only 2kro so hardware interrupt doesn't seem to matter not alone at least.
And even then it matters little.

The Filco Gen 2 keyboard I am typing this on is running at 1000hz over USB. 1ms delay for packets. Each packet contains MULTIPLE characters.

In other words the connection method is moot when it comes to latencies. Not sure why the OP disagrees.
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post #12888 of 14551
Quote:
Originally Posted by HWI View Post
;P
Quote:
Originally Posted by cmdrdredd View Post
Tell that to graphic artists who use macs almost exclusively. I work in the industry and all our software is Mac. Our CTP server is PC but Heidelberg recommended we use a Mac for the client because it has less issues with page layouts and proofing (color matching). Closed system and all...
lol

Also, I don't think a graphic artist needs to worry much about NKRO.
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post #12889 of 14551
Quote:
Originally Posted by ripster View Post
And even then it matters little.

The Filco Gen 2 keyboard I am typing this on is running at 1000hz over USB. 1ms delay for packets. Each packet contains MULTIPLE characters.

In other words the connection method is moot when it comes to latencies. Not sure why the OP disagrees.
Mine was only thirst for knowledge and actually I wanted to know if the 6kro limitation was because they went cheap on the boards or for some usb standard limitation.

At least now I know the answer
post #12890 of 14551
No, there really is no USB limitation. More just laziness on most keyboard designers part.

Anyway, 6KRO over USB is good enough.
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