Add man page for recently introduced tdvfb(4).
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rkujawa
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# $NetBSD: Makefile,v 1.588 2012/07/13 22:58:45 abs Exp $
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# $NetBSD: Makefile,v 1.589 2012/07/19 08:57:09 rkujawa Exp $
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# @(#)Makefile 8.1 (Berkeley) 6/18/93
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MAN= aac.4 ac97.4 acardide.4 aceride.4 acphy.4 \
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@ -57,7 +57,7 @@ MAN= aac.4 ac97.4 acardide.4 aceride.4 acphy.4 \
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sm.4 smsh.4 sn.4 sony.4 spc.4 speaker.4 spif.4 sqphy.4 ss.4 \
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st.4 ste.4 stge.4 sti.4 stpcide.4 sv.4 strip.4 \
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svwsata.4 swsensor.4 swwdog.4 sysmon.4 \
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tap.4 tc.4 tcds.4 tcp.4 termios.4 tfb.4 thinkpad.4 \
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tap.4 tc.4 tcds.4 tcp.4 tdvfb.4 termios.4 tfb.4 thinkpad.4 \
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ti.4 tl.4 tlp.4 tlphy.4 tp.4 tpm.4 tprof.4 tr.4 tra.4 \
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trm.4 tty.4 tun.4 tqphy.4 twa.4 twe.4 txp.4 \
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uark.4 ubsec.4 udp.4 uep.4 ug.4 uha.4 uk.4 ukphy.4 unix.4 userconf.4 \
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.\" $NetBSD: tdvfb.4,v 1.1 2012/07/19 08:57:09 rkujawa Exp $
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.\"
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.\" Copyright (c) 2012 Radoslaw Kujawa
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd July 19, 2012
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.Dt TDVFB 4
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.Os
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.Sh NAME
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.Nm tdvfb
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.Nd 3Dfx Voodoo 2 framebuffer driver
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.Sh SYNOPSIS
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.Cd "tdvfb* at pci?"
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.Cd "wsdisplay* at tdvfb?"
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.Cd "options TDVFB_CONSOLE"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the 3Dfx Voodoo 2 graphics card and provides an
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interface for machine independent
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.Xr wscons 4
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driver.
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.Pp
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Since Voodoo2 was originally designed as a 3D-only solution, most boards do not
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have any kind of firmware.
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The
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.Nm
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driver is albe to do low level initialization (boot) of the board, which means
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that it can be used on all architectures and is truly machine independent.
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However, it also means that driver is can not detect automatically if Voodoo2
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is used as a console.
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.Dv TDVFB_CONSOLE
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option is provided and should be set if the
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.Nm
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driver is intended to be used as a console.
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.Sh SEE ALSO
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.Xr genfb 4 ,
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.Xr voodoofb 4 ,
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.Xr wsdisplay 4
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.Rs
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.%A 3Dfx Interactive, Inc.
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.%T Voodoo2 Graphics Engine for 3D Game Acceleration
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.%N Revision 1.16
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.%D December 1, 1999
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.Re
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Radoslaw Kujawa .
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3Dfx Glide 2.x source code, Linux driver by
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.An Ghozlane Toumi
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were used as reference.
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The
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.Xr wscons 4
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attachment code is based mostly on a
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.Xr genfb 4
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driver by
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.An Michael Lorenz .
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.Sh BUGS
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The
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.Nm
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driver is unaccelerated. 3Dfx Voodoo2 has a simple 2D graphics engine but it is
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unsupported yet.
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.Pp
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Video mode is hard coded to 800x600 at 60Hz in 32-bits, it should be selectable
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at least via kernel configuration file.
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It is not possibe to detect what resolutions are supported by the monitor,
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since Voodoo2 has no DDC interface.
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.Pp
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8-bit depth is not supported by the hardware.
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16-bit depth is supported by the hardware and is a prefered depth, however it
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does not work corretly at the moment (this is a driver problem).
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