motherboard Pin | Pin Name |
Description |
1 | clk | mouse clock |
2 | Vss | electrical ground |
3 | nc | no connection |
4 | data | mouse data |
5 | nc | no connection |
6 | nc | no connection |
7 | nc | no connection |
8 | Vcc | +5vdc |
according to a PDF file from a site dedicated to the ElPina/Mcompa/M571 motherboard the enclosed info shows how to connect a PS/2 mouse to the 8 pins on this main board near the keyboard input.