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-.\" Copyright (c) 2004 Roman Kurakin <rik@cronyx.ru>
-.\" Copyright (c) 2004 Cronyx Engineering
-.\" All rights reserved.
-.\"
-.\" This software is distributed with NO WARRANTIES, not even the implied
-.\" warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-.\"
-.\" Authors grant any other persons or organisations a permission to use,
-.\" modify and redistribute this software in source and binary forms,
-.\" as long as this message is kept with the software, all derivative
-.\" works or modified versions.
-.\"
-.\" Cronyx Id: ct.4,v 1.1.2.6 2004/06/21 17:56:40 rik Exp $
-.\" $FreeBSD$
-.\"
-.Dd March 2, 2020
-.Dt CTAU 4 i386
-.Os
-.Sh NAME
-.Nm ctau
-.Nd driver for synchronous Cronyx Tau WAN adapters
-.Sh SYNOPSIS
-.Cd "device ctau"
-.Pp
-Additional options:
-.Cd "device sppp"
-.Cd "options NETGRAPH"
-.Cd "options NETGRAPH_CRONYX"
-.Pp
-In
-.Pa /boot/device.hints :
-.Cd hint.ctau.0.at="isa"
-.Cd hint.ctau.0.port="0x240"
-.Cd hint.ctau.0.irq="15"
-.Cd hint.ctau.0.drq="7"
-.Sh DEPRECATION NOTICE
-The
-.Nm
-driver is not present in
-.Fx 13.0
-and later.
-.Sh DESCRIPTION
-The
-.Nm
-driver needs either
-.Xr sppp 4
-or
-.Xr netgraph 4 .
-Which one to use is determined by the
-.Dv NETGRAPH_CRONYX
-option.
-If this option is present in your kernel configuration file, the
-.Nm
-driver will be compiled with
-.Xr netgraph 4
-support.
-Otherwise, it will be compiled with
-.Xr sppp 4
-support.
-.Pp
-The base I/O port address specified in
-.Pa /boot/device.hints
-must match the port address set by the jumpers on the board.
-The DMA I/O channel and interrupt request numbers are configured
-by software at adapter initialization.
-Legal values are:
-.Pp
-.Bl -tag -compact -width Port:
-.It Port :
-0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0,
-0x300, 0x320, 0x340, 0x360, 0x380, 0x3a0, 0x3c0, 0x3e0
-.It IRQ :
-3, 5, 7, 10, 11, 12, 15
-.It DMA :
-5, 6, 7
-.El
-.Pp
-The
-.Nm
-driver supports autodetection.
-As for all non-PNP hardware, using
-autodetection could lead to some potential problems with other devices during
-the hardware detection process.
-It is always better to specify hardware resources manually.
-.Pp
-Refer to
-.Xr sconfig 8
-for information about the
-.Nm
-adapter configuration.
-.Sh HARDWARE
-The
-.Nm
-driver supports the following cards:
-.Pp
-.Bl -bullet -compact
-.It
-Cronyx Tau (RS-232/V.35)
-.It
-Cronyx Tau/R (RS-530/RS-449)
-.It
-Cronyx Tau/E1 (fractional E1)
-.It
-Cronyx Tau/G703 (unframed E1)
-.El
-.Sh SEE ALSO
-.Xr cp 4 ,
-.Xr cx 4 ,
-.Xr sppp 4 ,
-.Xr ifconfig 8 ,
-.Xr sconfig 8 ,
-.Xr spppcontrol 8
-.Sh HISTORY
-The
-.Nm
-driver was added in
-.Fx 5.3
-and
-.Fx 4.10 .
-The
-.Nm
-driver for previous versions of
-.Fx
-is available from
-.Pa http://www.cronyx.ru/ .