Originally Posted by Tator Tot
I expect to get some work in on the Guide this week. To update multiple section, include more keyboards, etc.
The only section I think I will really need help with is the Keyboard by switch type list. As there are a lot of cherry keyboards; but I'd like to get as much of detailed list as possible.
Here's something I put together. May need tweaking, but a good place to start off.
Ghosting is a potential issue where certain combinations of three or more keys can cause an additional key to be registered. Ghosting is a rare problem, and is a sign of a serious design flaw in the keyboard.
Many manufacturers misuse the term ghosting to refer to Blocking, or use the term 'anti-ghosting' to refer to a gaming optimized matrix.
Blocking is when certain combinations of three or more keys result in one or more of the keys not being registered. Rather than being a design problem, blocking is deliberately implemented to prevent ghosting. The combinations of keys that block are dependent on the design of the keyboard.
Game Optimized Matrix
This term, and others like it, are used by manufacturers to describe a keyboard whose switching matrix has been designed in such a way to prevent blocking occuring on certain commonly used gaming combinations. It does not eliminate blocking, it merely tries to avoid it. In many instances, it is little more than marketing hype, and does not provide a tangible benefit over a regular keyboard. However, on some keyboards such as the Microsoft Sidewinder X4, the quality of optimiziation means that it is almost as good as a NKRO keyboard for most usage.
n-Key Rollover, usually called NKRO, refers to a keyboard that suffers from neither blocking nor ghosting. In a true NKRO keyboard, any number and or combination of keys can be pressed simultaneously, and all will be registered correctly.
Certain peripheral interfaces such as USB are not designed to support true NKRO. This, a USB NKRO keyboard will not suffer from blocking or ghosting, but is only capable of sending a limited number of keys over the interface at once. Additional keys pressed beyond the limit will generally cause some of the other keys to be dropped. USB is usually limited to 6 regular keys and 4 modifier keys. Some keyboards are able to cheat this limit, but sometimes at the expense of quirky behavior or incompatibility with certain operating systems.
2KRO, 6KRO and others
Sometimes, key rollover is measured using a number. This practise is somewhat confusing because it means different things in different contexts. 2KRO is often used to describe a keyboard with blocking, and is meant to be read as "any combination of two keys are guaranteed to work, and some combinations of three or more keys will work, but others will not". 6KRO is often used to describe an interface-limited NKRO keyboard, and is meant to be read as "any combination of up to six keys are guaranteed, but no combinations of seven or more will work".
Some rollover quantities greater than 6, such as 12KRO, 18KRO or 22KRO are used to refer to heavily optimized matrices, or interface-limited NKRO keyboards that have got around the 6 key limit.
Transposition errors are when a number of keys entered in rapid succession are registered in the wrong order. For example, typing A then B then C, and the keyboard registering ACB or BAC. As with ghosting, this is the result of a design flaw in the controller, and is not considered acceptable failure. These errors have been spotted in certain low quality mechanical keyboards.
Originally Posted by webwit
By *cough* "dithering" measurements one could actually increase the inaccuracy while simultaneously introducing a false sense of accuracy. I could explain it to ripster, but when I used high school mathematics before he just ignored it, so I'll let him live in his fantasy world. In some way it's it is a form of art to collect a database of useless data from people who are ignoring that fact.
Even if the coins were accurate, the weights tell you so little about the switches, even in terms of how tiring they are to use. By Cherry's own official force graphs, the peak force of the Blue Cherry is 60g. Also by Cherry's graphs, the actuation force is 60g. If we were to take the force rating as a meaningful indicator of how stiff the switches are, one might conclude that they are equally tiring to type on. Yet, this is not the case. Ho-hum.Edited by ch_123 - 6/28/11 at 5:19am