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Man Pages
ABTN(4) FreeBSD Kernel Interfaces Manual ABTN(4)

abtn
ADB Keyboard Special Keys Driver

To compile this driver into the kernel, place the following lines in your kernel configuration file:
device adb

The abtn driver provides support for the extended Fn keys on Apple notebooks with an ADB interface.

The abtn driver supports extended keyboard keys (special F-keys) on the following devices:

  • Apple iBook Keyboard
  • Apple PowerBook Keyboard

The abtn driver sends events to devd(8) for the following events under the PMU system, and keys subsystem:

  • brightness - Generates up and down notify types matching the pressed key.
  • mute
  • volume - Generates up and down notify types matching the pressed key.
  • eject

Examples are included in /etc/devd/apple.conf.

adb(4), akbd(4), cuda(4), pmu(4), devd(8)

The abtn device driver first appeared in NetBSD 5.0 and was ported to FreeBSD 10.0.

The abtn driver was written by Tsubai Masanari for NetBSD and ported to FreeBSD by Justin Hibbits.
October 16, 2011 FreeBSD 13.1-RELEASE

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