Pinouts for the PS/2 Model 80 Mouse port. Pin # 1 ----- On-AC Comercial Power 2 ----- Not Used 3 ----- Ground 4 ----- Not used 5 ----- Low-Battery-Warning signal (Open) 6 ----- Not Used looking at the mouse port: -------- / 6 ## 5 \ | 4 3 | \ 2 1 / -------- (the ## is the Notch in the connector) <> 70007,3430