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+.\"	$OpenBSD: cl.4,v 1.1 2013/05/18 11:26:01 miod Exp $
+.\"
+.\" Copyright (c) 2013 Miodrag Vallat.
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: May 18 2013 $
+.Dt CL 4 mvme88k
+.Os
+.Sh NAME
+.Nm cl
+.Nd Cirrus Logic CD2401 serial controller
+.Sh SYNOPSIS
+.Cd "cl0 at pcctwo0 offset 0x45000 ipl 3"
+.Cd "cl1 at pcctwo0 offset 0x45200 ipl 3" Pq "M8120 only"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the CD2401 serial controller found on
+MVME187, MVME197 and M8120 systems.
+.Pp
+Each CD2401 controller supports four serial ports with a 16 character buffer.
+.Pp
+The following link speeds are supported by the
+.Nm
+driver:
+50, 110, 150, 300, 600, 1200, 2401, 3600, 4800, 7200, 9600, 19200, 38400,
+56000 and 64000 bps,
+with an error margin smaller than 0.25%
+(except for 56000 bps, where the error margin is 0.80%).
+.Sh FILES
+.Bl -tag -width Pa -compact
+.It Pa /dev/tty[0-3]
+.It Pa /dev/tty[4-7] Pq M8120 only
+.El
+.Sh SEE ALSO
+.Xr intro 4 ,
+.Xr tty 4