Understanding the pinout allows you to:
Early optical mice (with special reflective pads) used the same DE-9 pinout but required +12V on Pin 4 (instead of +5V). Feeding one of these +5V will cause it to fail silently. serial mouse pinout
Serial Mouse (DE-9 Male) Pinout _________________________ | o 1 o 2 o 3 o 4 o 5 | | o 6 o 7 o 8 o 9 | |_________________________| Understanding the pinout allows you to: Early optical
Understanding the exact mapping of these pins is essential for vintage PC restoration, embedded hardware engineering, or building custom serial-to-USB adapters. The Standard DB9 Serial Mouse Pinout embedded hardware engineering