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+.\"	$NetBSD: ms.4,v 1.5 2017/02/17 22:24:47 christos Exp $
+.\"
+.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Paul Kranenburg.
+.\"
+.\" 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. 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``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 FOUNDATION OR CONTRIBUTORS
+.\" 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.
+.\"
+.Dd February 17, 2017
+.Dt MS 4 sun2
+.Os
+.Sh NAME
+.Nm ms
+.Nd Sun workstation mouse driver
+.Sh SYNOPSIS
+.Cd "ms0 at zstty?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides an interface to the workstation console mouse.
+This
+.Tn Mouse Systems
+three-button device produces five-byte blobs of the form:
+.Bd -literal -offset indent
+b dx dy dx dy
+.Ed
+.Pp
+where
+.Dq b
+is the button state, encoded as
+.Li 0x80|(~buttons)
+-- there are three buttons (4=left, 2=middle, 1=right) --
+and
+.Dq \&dx
+and
+.Dq \&dy
+are X and Y delta values, none of which are in the range
+.Bq Li 0x80..0x87 .
+.Pp
+The device special file
+.Pa /dev/mouse
+is used to get direct access to the mouse input stream.
+The following
+ioctl's are supported (mostly just enough to keep the
+.Ic X
+server going):
+.Bl -tag -width VUIDSFORMAT
+.It Dv VUIDSFORMAT
+Set translation mode.
+The argument is of type
+.Fa "int *" ,
+the only value supported is
+.Dv VUID_FIRM_EVENT .
+.It Dv VUIDGFORMAT
+Get translation mode.
+The argument is of type
+.Fa "int *" .
+.Dv VUID_FIRM_EVENT
+is always returned.
+.El
+.Ss OPTIONS
+The mouse driver can be configured using the following kernel configuration
+file options.
+.Bl -tag -width VUIDSFORMAT
+.It Cd options SUN_MS_BPS=integer
+This option causes the kernel to communicate with the mouse using the serial
+baud rate
+.Va integer .
+It is useful for mice which do not communicate at 1200 baud.
+.El
+.Sh SEE ALSO
+.Xr sun2/kbd 4
+.Sh BUGS
+.Nm
+is hardwired to the built-in
+.Em zs1
+serial port.