| 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.

