Do you bear in mind the PS/2 port in your keyboard? Why is it not used?

Properly, it was a controversial concern that was pushed by a number of elements, the

Properly, it was a controversial concern that was pushed by a number of elements, the principle one and curiously by no means anticipated (irony off) was the consumer himself, who took it upon himself, as has been occurring with USB-A for many years, to offer it a sluggish demise till the producers determined to dispense with it for technical and RMA causes.

Keyboards and mice with PS / 2, a steady battle

The reality is that the common consumer had no thought what to do with the PS / 2 past figuring out that the mouse or keyboard was linked there. At first it was solely the keyboard with the AT format that had this interface, whereas the mouse continued with RS-232however given the constraints of this and its disuse fell into oblivion, the mouse adopted the PS / 2 and that’s the place the issues got here.

At first there weren’t two colours to distinguish them as such, and that prompted electrical issues on PCs as a result of the PS/2 interface for the mouse was electrically totally different from that of the keyboard, because the latter was bidirectional.

The controllers on motherboards didn’t know methods to interpret what had been plugged in as such and logically they ended up frying, leaving the PC with out enter ports.

The subsequent step was to call the interfaces with colours and the connectors of the peripherals have been additionally coloured with them, enormously facilitating the use and avoiding errors, however there have been those that didn’t even need to look behind the PC to attach them effectively, so board makers needed to create safety circuits the place the voltage was merely lower off when the PS/2 keyboard collector was not detected.

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Is that this the principle purpose?

Sure and no. It was one of many excuses, the opposite has to do with the frequency and its vary, since we’re speaking about between 10KHz and 16.66KHz, the place as well as the typing pace of the customers started to rise and this started to be an issue because the keyboards started to implement Anti Ghosting and N-Key Rollover applied sciencesso that they weren’t blocked as such and left a move of knowledge that was being overwhelmed increasingly more with relying on which customers have been very docile in dealing with keyboard writing.

This, coupled with the truth that USB turned very fashionable, pressured producers to implement two controllers and two PS/2 ports for keyboard and mouse, which elevated prices. The mouse, being serial and having much less data per second, took longer to vanish, however earlier than this, producers built-in twin controllers, unifying each PS/2 ports for keyboard and mouse into one, rising pace and stopping electrical cuts that unplugging meant sizzling one of many two (they weren’t Plug & Play).

Lastly, the push of USB coupled with price financial savings to a terrific extent and the necessity for shorter entry occasions for avid gamers and professionals ended up killing PS/2 for keyboards in favor of way more generic, quicker, electrically powered USB. less complicated and above all with out RMA issues attributable to its sizzling issue.

As mice developed towards larger polling charges, extra buttons, and quicker speeds, PS/2 turned out of date, and mice rapidly moved to USB, forsaking this interface that has given us a lot pleasure.

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