Apple DeskTop Bus: Pinouts

This article list the pinouts and signals for the Apple DeskTop Bus (ADB).
Pin   Names       Meaning
1     Data        Bi-directional data bus for input and output
2     Reserved
3     Power       +5 volts from the CPU
4     Return      Ground from the CPU

There are two identical Mini DIN-4 Ports.

      4        3
     2          1
Published Date: Feb 18, 2012