Apple Desktop Bus (ADB)
From HwB
Pinout
4 PIN MINI-DIN FEMALE at the computer.
| Pin | Name | Description |
|---|---|---|
| 1 | Data | Data, grounded by an open collector or pulled to +5 V through 470 |
| 2 | Power On | Power on, fed by +5 V through 100 k; connect to pin 4 to turn on the system |
| 3 | +5V | +5 V at 500 mA maximum drain; protected by a 1.25-A circuit breaker |
| 4 | GND | Ground return |
At least available on: Power Macintosh 9500