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+.\"     $OpenBSD: tctrl.4,v 1.1 1999/09/09 03:03:22 jason Exp $
+.\"
+.\" Copyright (c) 1999 Jason L. Wright (jason@thought.net)
+.\" 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. 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 Jason L. Wright.
+.\" 4. 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.
+.\"
+.Dd September 8, 1999
+.Dt TCTRL 4 sparc
+.Os
+.Sh NAME
+.Nm tctrl
+.Nd Tadpole Microcontroller Interface
+.Sh SYNOPSIS
+.Cd "tctrl0 at obio0"
+.Sh DESCRIPTION
+The
+.Nm tctrl
+provides control over many functions on the Tadpole 3GS and 3GX laptops.
+The microcontroller is used to power the tft display down when the
+laptop lid is closed and when the screen is blanked by the
+.Xr pnozz 4
+driver.
+The
+.Nm tctrl
+is also used to power the laptop off when the
+.Xr reboot 2
+system call is used with the
+.Ar RB_POWERDOWN
+flag is set.
+.Sh SEE ALSO
+.Xr reboot 2 ,
+.Xr intro 4 ,
+.Xr pnozz 4