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4 pin USB A or USB B plug схематический вид разъема
4 pin USB A or USB B plug разъем
at the USB cable
6 pin mini-DIN male (PS/2 STYLE) схематический вид разъема
6 pin mini-DIN male (PS/2 STYLE) разъем
at the PS/2 mouse cable
Connecting USB-mouse to PS/2 connector of computer. It works only with device which supports both interfaces (USB & PS/2).
USB Pin
Name		 USB Pin
Number		 Direction Usb Color PS/2 mouse controller Pin
Number		 PS/2 mouse controller Pin
Name		 Description PS/2 Color
VDC +5V 1 <-- Red 4 VDC +5V   Red
Data- 2 -?- White 1 Data   White
Data+ 3 -?- Green 5 Clock   Brown
Ground 4 -?- Black 3 Ground   Black

Very nice to have one more empty USB connector :).

It's good practice to pull up data/clock lines with some resistors of 10k or so. Especially when connecting to newer motherboards. In some cases signal has levels between 1.5 and 2.5 volts, and mouse don't work. Pulling up helps in that situations and doesn't harm if unnecessary.

 

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Pinouts.ru > Кабели и переходники для клавиатур, мышей и т.д. > Распиновка Подключение USB-мыши к PS/2 разъёму компьютера использующего разъем 4 pin USB A or USB B plug и разъем 6 pin mini-DIN male (PS/2 STYLE)
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