> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/abtn.4.md).

# abtn.4

`abtn` — ADB 键盘特殊键驱动

## 名称

`abtn`

## 概要

`要将此驱动编译进内核，请将以下行放入你的内核配置文件：`

> device adb

## 描述

`abtn` 驱动为带有 ADB 接口的 Apple 笔记本上的扩展 Fn 键提供支持。

## 硬件

`abtn` 驱动支持以下设备上的扩展键盘键（特殊 F 键）：

* Apple iBook 键盘
* Apple PowerBook 键盘

## 事件

`abtn` 驱动在 `PMU` 系统和 `keys` 子系统下，为以下事件向 devd(8) 发送事件：

* `brightness` - 生成与按下的键匹配的 `up` 和 `down` 通知类型。
* `mute`
* `volume` - 生成与按下的键匹配的 `up` 和 `down` 通知类型。
* `eject`

示例包含在 **`/etc/devd/apple.conf`** 中。

## 参见

[adb(4)](/man/man4/adb.4.md), [akbd(4)](/man/man4/akbd.4.md), [cuda(4)](/man/man4/cuda.4.md), [pmu(4)](/man/man4/pmu.4.md), devd(8)

## 历史

`abtn` 设备驱动首次出现于 NetBSD 5.0，并移植到 FreeBSD 10.0。

## 作者

`abtn` 驱动由 Tsubai Masanari 为 NetBSD 编写，并由 Justin Hibbits 移植到 FreeBSD。


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