NAME
adb
—
introduction to Apple Desktop Bus
support
SYNOPSIS
adb0 at macobio?
abtn* at adb?
akbd* at adb?
ams* at adb?
apm0 at adb?
piic0 at adb?
DESCRIPTION
The Apple Desktop Bus (ADB) is the single-master, multiple-slave, low-speed serial bus interface used by Macintosh computers to connect input devices such as keyboards, mice, trackballs, and graphics tablets to the machine.
Originally developed for the Mac68K port, the
adb
driver was heavily modified when it was ported
to the PowerPC architecture. During this port it seems that the original
adb
event device was split into many smaller
subsystems, namely:
New adb
devices such as the Apple
Brightness / Volume Control Button (abtn(4)), some energy control (apm(4)), and I2C controller (piic(4)) were added to the PowerPC port later to complement the ADB
system.
OpenBSD provides support for the following devices:
SEE ALSO
HISTORY
The adb
interface first appeared in
NetBSD 0.9. It has been under development ever
since. The original adb
manpage was written by Colin
Wood for NetBSD/Mac68K.
AUTHORS
Original ADB support was written by Bradley A. Grantham. The direct ADB routines were written by John P. Wittkoski.