1.\" $NetBSD: wdsc.4,v 1.12 2017/02/18 22:39:01 wiz Exp $ 2.\" 3.\" Copyright (c) 1999 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Steve C. Woodford. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 17, 2017 31.Dt WDSC 4 sgimips 32.Os 33.Sh NAME 34.Nm wdsc 35.Nd Western Digital WD33c93 SCSI Bus Interface Controller 36.Sh SYNOPSIS 37.Cd "wdsc* at hpc? offset ?" 38.Sh DESCRIPTION 39The 40.Nm 41driver provides an abstraction layer between the SCSI hardware 42found in multitudinous SGI machines (including Personal Iris series, 43Indigo, Indy, Challenge S, Indigo2, and Challenge M) and the machine independent 44SCSI drivers described in 45.Xr scsibus 4 . 46.Pp 47In addition to sending the required SCSI commands to 48target devices on the SCSI bus, the 49.Nm 50driver deals with DMA, device interrupts, sync/async negotiation, 51and target disconnects/reconnects. 52.Sh SEE ALSO 53.Xr scsibus 4 , 54.Xr sgimips/hpc 4 55.Sh HISTORY 56Wayne Knowles ported the sgimips incarnation of the 57.Nm 58driver from the amiga and atari ports. 59It first appeared in 60.Nx 1.6 . 61