130 lines
4.4 KiB
Groff
130 lines
4.4 KiB
Groff
.\" $NetBSD: cnw.4,v 1.12 2001/09/12 18:19:17 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that this notice is retained,
|
|
.\" the conditions in the following notices are met, and terms applying
|
|
.\" to contributors in the following notices also apply to Berkeley
|
|
.\" Software Design, Inc.
|
|
.\"
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by
|
|
.\" Berkeley Software Design, Inc.
|
|
.\" 4. Neither the name of the Berkeley Software Design, Inc. nor the names
|
|
.\" of its contributors may be used to endorse or promote products derived
|
|
.\" from this software without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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.
|
|
.\"
|
|
.\" PAO2 Id: cnw.4,v 1.1.1.1 1997/12/11 14:46:23 itojun Exp
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd September 5, 2004
|
|
.Dt CNW 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm cnw
|
|
.Nd Netwave AirSurfer wireless network driver
|
|
.Sh SYNOPSIS
|
|
.Cd "device cnw"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
interface provides access to a theoretical 1Mb/s wireless Ethernet network
|
|
based on the Netwave AirSurfer Wireless LAN (formerly known as the Xircom
|
|
Netwave Wireless LAN).
|
|
.Pp
|
|
Note that the driver does not support newer devices
|
|
such as the Netwave AirSurfer
|
|
.Dq Plus ,
|
|
or the BayStack 650/660.
|
|
These devices are supported by the
|
|
.Xr awi 4
|
|
driver.
|
|
.Pp
|
|
Netwave devices are not compatible with IEEE 802.11 wireless networks.
|
|
Also note that there are Netwave devices with different wireless frequency,
|
|
depending on the radio band plan in each country.
|
|
.Pp
|
|
The card uses 36K of I/O memory mapped to the card.
|
|
.\"The card uses 32K of I/O memory mapped to the card along with either 16 I/O ports
|
|
.\"or 4K of additional I/O memory for access to command registers.
|
|
.\"The driver currently only supports the use of the additional 4K of I/O memory.
|
|
You may need to increase memory space available to the PC Card controller.
|
|
See
|
|
.Xr pccard 4
|
|
for details.
|
|
.Pp
|
|
In use, the cards appear to achieve up to a 420Kb/s transfer rate, though
|
|
a transfer rate between 250Kb/s and 350Kb/s is typical.
|
|
.Pp
|
|
The card operates in the 2.4GHz frequency range and is subject to interference
|
|
from microwaves, IEEE 802.11 wireless network devices, as well as earth.
|
|
For example, it seems that IEEE 802.11 channel 14 conflicts with Netwave
|
|
(US frequency).
|
|
They interfere with each other if they are both operated
|
|
in the same geographic region, causing weird packet loss.
|
|
You may be able to avoid the interference with IEEE 802.11 devices,
|
|
by changing the IEEE 802.11 channel.
|
|
.Sh HARDWARE
|
|
Cards supported by the
|
|
.Nm
|
|
driver include:
|
|
.Pp
|
|
.Bl -bullet -compact
|
|
.It
|
|
Xircom CreditCard Netwave
|
|
.It
|
|
NetWave AirSurfer
|
|
.El
|
|
.Sh DIAGNOSTICS
|
|
.Bl -diag
|
|
.It "cnw0: can't map memory"
|
|
Indicates that the driver was not able to allocate enough PC Card bus
|
|
address space into which to map the device.
|
|
See
|
|
.Xr pccard 4
|
|
and increase memory available to the PC Card controller.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr arp 4 ,
|
|
.Xr awi 4 ,
|
|
.Xr inet 4 ,
|
|
.Xr intro 4 ,
|
|
.Xr pccard 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
driver was ported from
|
|
.Nx
|
|
by
|
|
.An Hiroyuki Aizu Aq aizu@jaist.ac.jp .
|
|
It first appeared in
|
|
.Nx 1.4 .
|
|
The first
|
|
.Fx
|
|
release to include it was
|
|
.Fx 5.0 .
|
|
This manual page was adopted from
|
|
.Nx
|
|
by
|
|
.An Christian Brueffer Aq brueffer@FreeBSD.org .
|