It seems that various devices are gradually unifying their interfaces. Since the introduction of USB in 1996, we have made great progress along the way from the era of different devices with different interfaces. Even so, there are still some special circumstances, but there are a bunch of others. People don’t have to accept USB completely, especially keyboards and mice. Although some input devices sold on the market do use USB connection, some people use another connection method, that is, the PS/2 interface. Why? Some people still like to use these green and purple antiques from the 90s?
USB and PS/2 seem to have the same function. They are both connecting your keyboard or mouse to the computer, but their working principles are quite different, but their working principles are quite different, some high-end ones. The motherboard, because of these differences, still retains the PS/2 interface. The USB runs by polling the device status, which is equivalent to your computer asking your keyboard or mouse, why? Then your mouse and keyboard will respond and move to the left. PS/2 works by sending an interrupt request to the system. Instead of waiting for the computer to ask about the keyboard and mouse status, the PS/2 protocol makes your keyboard or mouse actively interrupt you. The current activity of the CPU and then communicate to the computer what is happening is for this reason. Some enthusiasts claim that the PS/2 latency is lower, which in theory can make the reaction time in the game faster.
PS/2 also supports true full-key no punching, which means that the system can recognize how many keys you press at a time. Some USB keyboards also advertise this function, but it is generally achieved by simulating multiple keyboards. , Which will limit the number of external output devices you need, not only requires special software
PS/2 other featuresUSB sometimes encounters compatibility issues when booting, because the PS/2 interface is designed for keyboard and mouse.
The e-sports campaign has been hand-held, and the response speed brought by the PS/2 change is not felt at all
The PS/2 design does not support hot-plugging. On older devices, if you try to replace the mouse, you need to restart it before you can use it, and sometimes it may even damage your device.
PS/2 was not designed for frequent insertion and removal. The small pins in the plug are easy to bend or even break. The PS/2 interface occupies a large area and is not as durable as USB.
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