1.\" $OpenBSD: adb.4,v 1.20 2015/01/15 20:37:36 schwarze Exp $ 2.\" 3.\" Copyright (c) 2001 Peter Philipp 4.\" Copyright (c) 1997 Colin Wood 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by Colin Wood 18.\" for the NetBSD Project. 19.\" 4. The name of the author may not be used to endorse or promote products 20.\" derived from this software without specific prior written permission 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32.\" 33.Dd $Mdocdate: January 15 2015 $ 34.Dt ADB 4 macppc 35.Os 36.Sh NAME 37.Nm adb 38.Nd introduction to Apple Desktop Bus support 39.Sh SYNOPSIS 40.Cd "adb0 at macobio?" 41.Cd "abtn* at adb?" 42.Cd "akbd* at adb?" 43.Cd "ams* at adb?" 44.Cd "apm0 at adb?" 45.Cd "piic0 at adb?" 46.Sh DESCRIPTION 47The Apple Desktop Bus 48.Pq Tn ADB 49is the single-master, multiple-slave, low-speed serial bus 50interface used by Macintosh computers to connect input devices 51such as keyboards, mice, trackballs, and graphics tablets 52to the machine. 53.Pp 54Originally developed for the Mac68K port, the 55.Nm 56driver was heavily modified when it was ported to the PowerPC architecture. 57During this port it seems that the original 58.Nm 59event device was split into many smaller subsystems, namely: 60.Pp 61.Bl -enum -compact 62.It 63Apple Keyboard driver 64.Pq Xr akbd 4 . 65.It 66Apple Mouse Support driver 67.Pq Xr ams 4 . 68.El 69.Pp 70New 71.Nm 72devices such as the Apple Brightness / Volume Control Button 73.Pq Xr abtn 4 , 74some energy control 75.Pq Xr apm 4 , 76and I2C controller 77.Pq Xr piic 4 78were added to the PowerPC port later to complement the ADB system. 79.Pp 80.Ox 81provides support for the following devices: 82.Pp 83.Bl -tag -width "abtn(4)XX" -offset 3n -compact 84.It Xr abtn 4 85Apple brightness/volume/eject button control 86.It Xr akbd 4 87Apple Keyboard Device 88.It Xr ams 4 89Apple Mouse Support 90.It Xr apm 4 91advanced power management device interface 92.It Xr piic 4 93Apple via-pmu I2C controller 94.El 95.Sh SEE ALSO 96.Xr intro 4 97.Sh HISTORY 98The 99.Nm 100interface first appeared in 101.Nx 0.9 . 102It has been under development ever since. 103The original 104.Nm adb 105manpage was written by Colin Wood for 106.Nx Ns / Ns Mac68K. 107.Sh AUTHORS 108.An -nosplit 109Original ADB support was written by 110.An Bradley A. Grantham . 111The direct ADB routines were written by 112.An John P. Wittkoski . 113