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.\" $OpenBSD: gio.4,v 1.2 2007/05/31 19:19:56 jmc Exp $
.\" $NetBSD: gio.4,v 1.6 2004/02/10 16:55:43 wiz Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This document is derived from work contributed to The NetBSD Foundation
.\" by Antti Kantee.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the NetBSD
.\" Foundation, Inc. and its contributors.
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
.\" contributors may be used to endorse or promote products derived
.\" from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE
.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd $Mdocdate: May 31 2007 $
.Dt GIO 4 sgi
.Os
.Sh NAME
.Nm gio
.Nd SGI's early PCI-like bus
.Sh SYNOPSIS
.Cd "gio0 at imc0"
.Cd "gio0 at pic0"
.Sh DESCRIPTION
The
.Nm
bus is a bus for connecting high-speed peripherals to the main memory and
CPU.
The devices themselves are connected to the
.Xr hpc 4
peripheral controller, and memory and CPU are accessed through the
.Xr imc 4
(Indy Memory Controller) or
.Xr pic 4
(Processor Interface Controller).
The
.Nm
bus is found on the Indigo, Indy, and Indigo2 machines.
.Sh SEE ALSO
.Xr hpc 4 ,
.Xr imc 4 ,
.Xr pic 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 3.6 .
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