11

In the below image (from here), the "left" end (which I have labeled "A") is clearly two PS/2 ports.

What is the "right" end (which I have labeled "B")?
Does it connect directly to a motherboard?

Cable

The above is apparently Lenovo part number 43N9149, but I haven't been able to find an actual specification sheet for this part -- only third-party seller listings on Amazon, eBay, and the like.

ADDENDUM

I need to be able to use a PS/2 mouse with a Lenovo ThinkStation that I am considering. The particular system I am considering does not have a built-in PS/2 port, but Lenovo sells the above part as an add-on. The problem is, on my existing desktop (not Lenovo) I have tried external USB to PS/2 adapters (dongles) from third-parties, and I have experienced a significant latency issue when I connect a mouse to it. I mean, cursor movement on my screen significantly and noticeably lags the physical movement of my mouse with such external dongles. I'm hoping that the "B" end above has a faster connection than an external USB connection would have.

Andrew
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5 Answers5

20

B-end is a Lenovo-specific 7-pin PS/2 connector, which you connect straight to Lenovo motherboard. See 3rd image from this auction for the details:

http://www.ebay.com/itm/Lenovo-ThinkStation-ThinkCentre-FRU-43N9149-PS-2-Keyboard-Mouse-Cable-/251535857927

Tomasz Klim
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7

This 7-pin connector goes to a header on a Lenovo motherboard marked KB/MS (keyboard/mouse), specifically for interfacing the motherboard to PS/2 ports.

The header

According to the Lenovo forums, the pinout is as follows:

/-------\
|4|3|2|1|
| |7|6|5|
\-------/

Pin 1 - 5V
Pin 2 - CLK
Pin 3 - Data  [5V]
Pin 4 - GND
Pin 5 - 3.3V
Pin 6 - GND (noisy)
Pin 7 - Data  [5V]

There is no official spec available.

oldmud0
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4

It is the keyboard / mouse port for the computer. Yes, port B connects directly to the motherboard. Depending on the age of the computer, it could either connect to a USB connector or to serial controllers for the keyboard and mouse.

LDC3
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1

Looks like a USB internal connector. It should connect to the motherboard in the same header as what you would connect the 'front' USB on your case.

USB Headers

Though, given that it is a lenovo specific adapter, it could be specifically designed for a motherboard in one of their machines. Just check that the pins lines up (there's a covered over hole on the adapter and a missing pin on the headers, they should line up.)

Community
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Windos
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0

/-------\

|4|3|2|1|

|X|7|6|5|

-------/

Pin 1 - 5V (Keyboard & Mouse)

Pin 2 - Keyboard CLOCK

Pin 3 - Keyboard Data

Pin 4 - GROUND (Keyboard & Mouse)

Pin 5 - No connection

Pin 6 - Mouse CLOCK

Pin 7 - Mouse Data

Pin X - Connector Orientation KEY

Keyboard & Mouse mini-DIN-6 pinouts from http://www.burtonsys.com/PS2_keyboard_and_mouse_mini-DIN-6_connector_pinouts.html

Built from scrap parts and it works.

mati
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