.\"	$OpenBSD: wdc.4,v 1.3 2000/10/29 16:10:08 aaron Exp $
.\"	$NetBSD: wdc.4,v 1.4 1999/05/19 14:44:02 bouyer Exp $
.\"
.\" Copyright (c) 1998 Manuel Bouyer.
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.Dd October 15, 1998
.Dt WDC 4
.Os
.Sh NAME
.Nm wdc
.Nd WD100x compatible hard disk controller driver
.Sh SYNOPSIS
.Cd "wdc0 at isa? port 0x1f0 irq 14"
.Cd "wdc0 at isa? port 0x170 irq 15"
.Cd "wdc* at isapnp?"
.Cd "wdc* at pcmcia? function ?"
.Cd "wd* at wdc? drive ?"
.Sh DESCRIPTION
The
.Nm
driver provides the basic functions for the
.Xr wd 4
and
.Xr atapiscsi 4
drivers. It supports IDE and EIDE controllers, as well as MFM, RLL, and ESDI on
the ISA bus. PCI IDE controllers in legacy mode are also supported, but the
.Xr pciide 4
driver may provide more functionalities.
.Pp
For the ISA front-end, the 0x01 flag enables 32-bit I/O negotiation.
This is known to cause problems with some motherboards.
.Sh SEE ALSO
.Xr intro 4 ,
.Xr pciide 4 ,
.Xr scsi 4 ,
.Xr wd 4