.\"
.\" Copyright (c) 1997 Colin Wood
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\"    documentation and/or other materials provided with the distribution.
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.\"    must display the following acknowledgement:
.\"      This product includes software developed by Colin Wood
.\"      for the NetBSD Project.
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.\"	$NetBSD: mainbus.4,v 1.5 2017/02/17 22:24:47 christos Exp $
.\"
.Dd February 17, 2017
.Dt MAINBUS 4 mac68k
.Os
.Sh NAME
.Nm mainbus
.Nd Mac68k main processor bus device
.Sh SYNOPSIS
.Cd "mainbus0 at root"
.Sh DESCRIPTION
The
.Nm
interface serves as an abstraction used by the autoconfiguration
system to help find and attach busses
.Pq e.g. the Tn NuBus expansion bus
or devices
.Pq e.g. the math coprocessor
connected to the
.Tn Macintosh
main processor bus.
.Sh DIAGNOSTICS
.Bl -diag -compact
.It mainbus0 (root).
This is the normal autoconfiguration message indicating that the
main processor bus has been found.
.El
.Sh SEE ALSO
.Xr mac68k/autoconf 4 ,
.Xr mac68k/obio 4
.Sh HISTORY
The
.Nm
first appeared in
.Nx 1.2 .