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-.\"	$OpenBSD: tvrx.4,v 1.5 2013/01/18 21:19:10 miod Exp $
-.\"
-.\" Copyright (c) 2006, Miodrag Vallat
-.\"
-.\" 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 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 $Mdocdate: January 18 2013 $
-.Dt TVRX 4 hp300
-.Os
-.Sh NAME
-.Nm tvrx
-.Nd HP98705 PersonalVRX
-.Dq TigerShark
-frame buffer
-.Sh SYNOPSIS
-.Cd "tvrx*      at dio?"
-.Cd "wsdisplay* at tvrx?"
-.Sh DESCRIPTION
-The PersonalVRX frame buffer is an accelerated, high resolution
-.Pq 1280x1024
-external display, connected to a 98702 DIO-II interface board.
-The external display is composed of one (66570) or two (66570 with 66571 option)
-8-bit color frame buffer boards.
-Other option boards for the PersonalVRX family include the 66572
-.Sq Z-buffer ,
-the
-66573
-.Sq Transform Engine and Scan
-board, and the 66574
-.Sq Colormap .
-All models also have four overlay planes.
-.Pp
-The
-.Nm
-driver provides a frame buffer abstraction to the
-.Xr wscons 4
-console framework.
-.Pp
-Currently, the driver can only use the overlay planes, and will run as an
-unaccelerated 16 color frame buffer.
-.Pp
-2D acceleration is not available until the appropriate microcode has been
-downloaded into the framebuffer control logic; unfortunately, neither
-the microcode nor documentation about the download interface seem to be
-available.
-.Pp
-The PersonalVRX devices can be configured using the 5 DIP switches selector on
-the interface board to define the
-.Dq select code .
-The select code value is computed by adding 133 to the number made from the
-five binary digits.
-The default settings, with the two MSB switches set to 1 and the three LSB
-switches set to 0, provide a select code of 157.
-.Sh SEE ALSO
-.Xr dio 4 ,
-.Xr intro 4 ,
-.Xr wscons 4 ,
-.Xr wsdisplay 4