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+.\"
+.\" Copyright (c) 1998, 2000
+.\" 	Justin T. Gibbs.  All rights reserved.
+.\"
+.\" 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. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd July 14, 2004
+.Dt ADW 4
+.Os
+.Sh NAME
+.Nm adw
+.Nd Advansys PCI 16bit SCSI Host adapter driver
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following lines in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device pci"
+.Cd "device scbus"
+.Cd "device adw"
+.Ed
+.Sh DESCRIPTION
+This driver provides access to the 16bit
+.Tn SCSI
+bus connected to the Advanced Systems Products, Inc.
+.Tn ASC3550 Ultra ,
+and
+.Tn ASC38C0800 Ultra2 ,
+SCSI Host Adapter chips.
+Both chips support, synchronous transfers
+(20MHz and 40MHz max respectively),
+16bit transfers, tagged queueing,
+and up to 253 concurrent SCSI transactions.
+.Pp
+Per target configuration performed in the
+.Tn AdvanceWare
+menu, which is accessible at boot,
+is honored by this driver.
+This includes synchronous/asynchronous transfers,
+maximum synchronous negotiation rate, wide transfers, disconnection,
+tagged queueing, and the host adapter's SCSI ID.
+The global setting for the maximum number of tagged transactions allowed
+per target is not honored as the CAM SCSI system will automatically determine
+the maximum number of tags a device can receive as well as guarantee fair
+resource allocation among devices.
+.Sh HARDWARE
+The
+.Nm
+driver supports SCSI controllers including:
+.Pp
+.Bl -bullet -compact
+.It
+AdvanSys ABP940UW/ABP3940UW
+.It
+AdvanSys ABP950UW
+.It
+AdvanSys ABP970UW
+.It
+AdvanSys ABP3940U2W
+.It
+AdvanSys ABP3950U2W
+.El
+.Sh SEE ALSO
+.Xr adv 4 ,
+.Xr cd 4 ,
+.Xr da 4 ,
+.Xr sa 4 ,
+.Xr scsi 4
+.Sh HISTORY
+The
+.Nm
+driver appeared in
+.Fx 3.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was ported by
+.An Justin T. Gibbs
+from the Linux driver written by
+.An Bob Frey
+of Advanced System Products, Inc.
+Many thanks to AdvanSys for providing the original driver
+under a suitable license for use in
+.Fx .