1.\" $OpenBSD: uturn.4,v 1.8 2008/04/27 19:33:39 jmc Exp $ 2.\" 3.\" Copyright (c) 2004 Michael Shalayeff 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF MIND, 21.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.Dd $Mdocdate: April 27 2008 $ 27.Dt UTURN 4 hppa 28.Os 29.Sh NAME 30.Nm uturn 31.Nd U2/Uturn, Runway to GSC Bus bridge & IOA 32.Sh SYNOPSIS 33.Cd "uturn* at mainbus?" 34.Cd "astro* at uturn?" 35.Cd "dino* at uturn?" 36.Cd "lasi* at uturn?" 37.Cd "gecko* at uturn?" 38.Cd "sti* at uturn?" 39.Sh DESCRIPTION 40.Nm 41provides the functionality of IOA (not currently supported) as a bridge 42from the Runway bus (see 43.Xr runway 4 44for more information) to GSC. 45Modern systems, based on the PA-8000 and later 64-bit CPUs, use the 46.Nm U-Turn 47version, whilst earlier systems, based on the PA-7200 CPU, used 48a different version of the chip called 49.Nm U2 . 50.Sh SEE ALSO 51.Xr astro 4 , 52.Xr cpu 4 , 53.Xr dino 4 , 54.Xr gecko 4 , 55.Xr gsc 4 , 56.Xr intro 4 , 57.Xr pci 4 , 58.Xr runway 4 , 59.Xr sti 4 60.Sh HISTORY 61The 62.Nm 63driver 64appeared in 65.Ox 3.7 . 66