1.\" $OpenBSD: wdc.4,v 1.4 2001/07/06 18:08:56 deraadt Exp $ 2.\" $NetBSD: wdc.4,v 1.4 1999/05/19 14:44:02 bouyer Exp $ 3.\" 4.\" Copyright (c) 1998 Manuel Bouyer. 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.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34 35.Dd October 15, 1998 36.Dt WDC 4 37.Os 38.Sh NAME 39.Nm wdc 40.Nd WD100x compatible hard disk controller driver 41.Sh SYNOPSIS 42.Cd "wdc0 at isa? port 0x1f0 irq 14" 43.Cd "wdc0 at isa? port 0x170 irq 15" 44.Cd "wdc* at isapnp?" 45.Cd "wdc* at pcmcia? function ?" 46.Cd "wd* at wdc? drive ?" 47.Sh DESCRIPTION 48The 49.Nm 50driver provides the basic functions for the 51.Xr wd 4 52and 53.Xr atapiscsi 4 54drivers. It supports IDE and EIDE controllers, as well as MFM, RLL, and ESDI on 55the ISA bus. PCI IDE controllers in legacy mode are also supported, but the 56.Xr pciide 4 57driver may provide more functionality. 58.Pp 59For the ISA front-end, the 0x01 flag enables 32-bit I/O negotiation. 60This is known to cause problems with some motherboards. 61.Sh SEE ALSO 62.Xr intro 4 , 63.Xr pciide 4 , 64.Xr scsi 4 , 65.Xr wd 4 66