Apple Desktop Bus  From Wikipedia, the free encyclopedia Jump
to: navigation, search Apple Desktop Bus (ADB) ADB Icon.svgApple
ADB Keyboard.jpg The ADB Icon and an early ADB keyboard. Type
Human input device interface Designer Steve Wozniak/Apple
Computer Designed 1986 Manufacturer Apple Computer Inc. Produced
1986 to 1998 Superseded RS-422/6522 keyboard and mouse
Superseded by USB and FireWire (1998-1999) Hot pluggable
occasional support External yes Pins 4 Connector Mini-DIN Data
signal Bi-directional serial command stream Bitrate 125 kbit/s
maximum (~10 kbit/s actual) Max. devices 16 maximum (~5 actual,
3 supported) Protocol Serial MiniDIN-4 Connector Pinout.svg
Female socket from the front. Pin 1 ADB Data Pin 2 PSW Power on
Pin 3 +5V +5 volts power Pin 4 GND Ground Same connector as
S-Video  Apple Desktop Bus (ADB) is a bit-serial computer bus
connecting low-speed devices to computers. It was introduced on
the Apple IIGS in 1986 as a way to support low-cost devices like
keyboards and mice, allowing them t