# Apple Desktop Bus (ADB)

(at the computer)

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

Contributor: | Joakim Ögren

Source: | Apple Tech Info Library 18207: Power Macintosh 9500 Pinouts at Apple TIL homepage

Copyright © The Hardware Book Team 1996-2004.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-10