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From: meissner@cygnus.com (Michael Meissner)
Newsgroups: comp.unix.bsd.freebsd.misc,comp.windows.x.i386unix
Subject: Re: 1152 x 864 mode for S3 X-server?
Date: 01 Sep 1996 22:57:36 -0400
Organization: Cygnus Support
Lines: 296
Sender: meissner@wogglebug.tiac.net
Message-ID: <sy4tlh4o9r.fsf@wogglebug.tiac.net>
References: <5087uf$dpv@usenet10.interramp.com> <nycG1LR@quack.kfu.com>
NNTP-Posting-Host: 206.119.235.22
In-reply-to: nsayer@quack.kfu.com's message of Sat, 31 Aug 1996 19:47:35 UTC
X-Newsreader: Gnus v5.1
Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:26473 comp.windows.x.i386unix:20903
In article <nycG1LR@quack.kfu.com> nsayer@quack.kfu.com (Nick Sayer) writes:
| [note followups. This is not a FreeBSD specific issue]
|
| dcmyers@access.digex.net writes:
|
| >Has anyone run an S3-based video board at 1152x864 @ 70Hz? If so,
| >can you send/post your /etc/XF86Config file? I'd like to see the
| >mode timing numbers. The xf86config program does not allow you
| >to enter anything other than the standard VESA modes of 1024x768
| >and 1280x1024.
|
| ModeLine "1152x900" 110 1152 1184 1312 1504 900 902 904 935
|
| That's actually 78 Hz. You probably could just use 98 MHz as a dot clock
| instead of 110 if it absolutely _has_ to be 70 Hz.
With trial and error, I found my Nokia 477x worked best with:
ModeLine "1152x864" 125.000 1152 1216 1368 1656 864 864 867 909
On the other hand, my Mag DX17F monitor only supports:
ModeLine "1152x864" 99.000 1152 1208 1328 1552 864 864 866 902
(These are on 90 Mhz Pentiums (48 meg, 32 meg respecitively) with #9 GXE64 Pro
video cards with 2 meg of VRAM on each card.)
I picked up the following script some time ago that lets you calculate mode
lines more directly:
#!/bin/sh
# This is a shell archive (produced by GNU sharutils 4.2).
# To extract the files from this archive, save it to some FILE, remove
# everything before the `!/bin/sh' line above, then type `sh FILE'.
#
# Made on 1996-09-01 22:56 EDT by <meissner@wogglebug.tiac.net>.
# Source directory was `/home/meissner/bin.sh'.
#
# Existing files will *not* be overwritten unless `-c' is specified.
#
# This shar contains:
# length mode name
# ------ ---------- ------------------------------------------
# 1034 -r-xr-xr-x xconfig
# 2630 -r--r--r-- xconfig.awk
#
save_IFS="${IFS}"
IFS="${IFS}:"
gettext_dir=FAILED
locale_dir=FAILED
first_param="$1"
for dir in $PATH
do
if test "$gettext_dir" = FAILED && test -f $dir/gettext \
&& ($dir/gettext --version >/dev/null 2>&1)
then
set `$dir/gettext --version 2>&1`
if test "$3" = GNU
then
gettext_dir=$dir
fi
fi
if test "$locale_dir" = FAILED && test -f $dir/shar \
&& ($dir/shar --print-text-domain-dir >/dev/null 2>&1)
then
locale_dir=`$dir/shar --print-text-domain-dir`
fi
done
IFS="$save_IFS"
if test "$locale_dir" = FAILED || test "$gettext_dir" = FAILED
then
echo=echo
else
TEXTDOMAINDIR=$locale_dir
export TEXTDOMAINDIR
TEXTDOMAIN=sharutils
export TEXTDOMAIN
echo="$gettext_dir/gettext -s"
fi
touch -am 1231235999 $$.touch >/dev/null 2>&1
if test ! -f 1231235999 && test -f $$.touch; then
shar_touch=touch
else
shar_touch=:
echo
$echo 'WARNING: not restoring timestamps. Consider getting and'
$echo "installing GNU \`touch', distributed in GNU File Utilities..."
echo
fi
rm -f 1231235999 $$.touch
#
if mkdir _sh02303; then
$echo 'x -' 'creating lock directory'
else
$echo 'failed to create lock directory'
exit 1
fi
# ============= xconfig ==============
if test -f 'xconfig' && test "$first_param" != -c; then
$echo 'x -' SKIPPING 'xconfig' '(file already exists)'
else
$echo 'x -' extracting 'xconfig' '(text)'
sed 's/^X//' << 'SHAR_EOF' > 'xconfig' &&
#! /bin/sh
X
# HISTORY
# $Log: xconfig,v $
# Revision 1.3 1996/06/11 16:46:00 meissner
# Add max horizontal/vertical frequencies.
#
# Revision 1.2 1996/06/11 16:39:57 meissner
# Use /bin/echo.
#
# Revision 1.1 1996/06/11 16:39:16 meissner
# Initial revision
#
X
if [ $# -gt 0 ]; then
X HR="$1"
X shift
else
X /bin/echo -n "How many horizontal dots do you want to use? "
X read HR
fi
X
if [ $# -gt 0 ]; then
X VR="$1"
X shift
else
X /bin/echo -n "How many vertical dots do you want to use? "
X read VR
fi
X
if [ $# -gt 0 ]; then
X DCF="$1"
X shift
else
X /bin/echo -n "What dot clock frequency do you want to use? "
X read DCF
fi
X
if [ $# -gt 0 ]; then
X HSFMAX="$1"
X shift
else
X /bin/echo -n "What is the maximum horizontal frequency of the monitor? "
X read HSFMAX
fi
X
if [ $# -gt 0 ]; then
X VSFMAX="$1"
X shift
else
X /bin/echo -n "What is the maximum vertical frequency of the monitor? "
X read VSFMAX
fi
X
: ${MEISSNER:=$HOME}
X
exec awk -f ${MEISSNER}/bin.sh/xconfig.awk HR=$HR VR=$VR DCF=$DCF HSFMAX=$HSFMAX VSFMAX=$VSFMAX ${1+"$@"} < /dev/null
SHAR_EOF
$shar_touch -am 0611124696 'xconfig' &&
chmod 0555 'xconfig' ||
$echo 'restore of' 'xconfig' 'failed'
if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \
&& ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then
md5sum -c << SHAR_EOF >/dev/null 2>&1 \
|| $echo 'xconfig:' 'MD5 check failed'
d10732469f61a1d65a1224565ac30373 xconfig
SHAR_EOF
else
shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'xconfig'`"
test 1034 -eq "$shar_count" ||
$echo 'xconfig:' 'original size' '1034,' 'current size' "$shar_count!"
fi
fi
# ============= xconfig.awk ==============
if test -f 'xconfig.awk' && test "$first_param" != -c; then
$echo 'x -' SKIPPING 'xconfig.awk' '(file already exists)'
else
$echo 'x -' extracting 'xconfig.awk' '(text)'
sed 's/^X//' << 'SHAR_EOF' > 'xconfig.awk' &&
X
# HISTORY
# $Log: xconfig.awk,v $
# Revision 1.1 1996/06/11 16:33:02 meissner
# Initial revision
#
X
# xconfig.awk - awk script for calculating Xconfig parameters for
# XFree86, given the monitor specs and dot clock frequencies.
# The default values are for the Viewsonic 15.
#
# Example Usage:
# awk -f xconfig.awk HR=1024 VR=768 DCF=110 < /dev/null (or ^D input)
#
# The variable names and meanings are given below.
#
# Author: Richard Brown rab@tauon.ph.unimelb.edu.au
#
X
BEGIN{
X
X # Sensible defaults if not specified:
X
X HR = 1024 # Horizontal Resolution
X VR = 768 # Vertical Resolution
X DCF = 110.0 # Dot Clock Frequency (MHz)
X
X HFrontMIN = 0.50 # Horizontal Front Porch Minimum (us)
X HsyncMIN = 1.20 # Horizontal Sync Pulse Width Minimum (us)
X HBackMIN = 1.25 # Horizontal Back Porch Minimum (us)
X HBlankMIN = 4.00 # Horizontal Blank Period Minimum (us)
X HSFMAX = 64.0 # Max Horizontal Scan Frequency (kHz)
X
X VFrontMIN = 0.0 # Vertical Front Porch Minimum
X VsyncMIN = 45.0 # Vertical Sync Pulse Width Minimum
X VBackMIN = 500.0 # Vertical Back Porch Minimum
X VBlankMIN = 600.0 # Vertical Blank Period Minimum
X VSFMAX = 90.0 # Max Vertical Scan Frequency (Hz)
X
X verbose = 0
X
}
X
END{
X
X # Horizontal Scan Lines:
X
X Hfront = HFrontMIN * DCF + HR
X if( Hfront%8 ) Hfront = 8 * (1 + int(Hfront/8) )
X # if( (Hfront - HR) < HFrontMIN * DCF ) Hfront += 8
X
X Hsync = HsyncMIN * DCF + Hfront
X if( Hsync%8 ) Hsync = 8 * (1 + int(Hsync/8) )
X
X Hblank = HBlankMIN * DCF
X HFL = HR + Hblank
X if( HFL%8 ) HFL = 8 * (1 + int(HFL/8) )
X
X # Vertical:
X
X Vtick = HFL / DCF # us
X Vfront = VR + VfrontMIN / Vtick
X Vsync = Vfront + VsyncMIN / Vtick
X Vback = VBackMIN / Vtick
X Vblank = VBlankMIN / Vtick
X VFL = Vsync + Vback
X if( VFL < VR + Vblank ) VFL = VR + Vblank
X
X RR = 1000000 * DCF / (HFL * VFL)
X HSF = 1000 * DCF / HFL
X
X # Done: generate some output:
X
X if( verbose ) {
X printf "\n# Horizontal:\n"
X printf "# Front Porch = %.2f us, Sync = %.2f, Back Porch = %.2f, ",
X (Hfront - HR) / DCF, (Hsync - Hfront) / DCF, (HFL - Hsync) / DCF
X printf "Blank = %.2f\n\n", (HFL - HR) / DCF
X }
X
X printf "# Refresh Rate: %.2f Hz, Horizontal Sync Frequency: %.2f kHz\n",
X RR, HSF
X
X printf " \"%dx%d\"\t%.2f\t%d %d %d %d %d %d %d %d\n", HR, VR, DCF, HR,
X Hfront, Hsync, HFL, VR, Vfront, Vsync, VFL
X
X if( HSF > HSFMAX )
X printf("\nWarning: the Horizontal sync frequency may be too high for the monitor!\n")
X if( RR > VSFMAX )
X printf("\nWarning: this refresh rate may be too high for the monitor!\n")
}
SHAR_EOF
$shar_touch -am 0611123396 'xconfig.awk' &&
chmod 0444 'xconfig.awk' ||
$echo 'restore of' 'xconfig.awk' 'failed'
if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \
&& ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then
md5sum -c << SHAR_EOF >/dev/null 2>&1 \
|| $echo 'xconfig.awk:' 'MD5 check failed'
0ab1f725a4c860131e998a92df11f632 xconfig.awk
SHAR_EOF
else
shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'xconfig.awk'`"
test 2630 -eq "$shar_count" ||
$echo 'xconfig.awk:' 'original size' '2630,' 'current size' "$shar_count!"
fi
fi
rm -fr _sh02303
exit 0
--
Michael Meissner, Cygnus Support (East Coast)
955 Massachusetts Avenue, Cambridge, MA 02138, USA
meissner@cygnus.com, 617-354-5416 (office), 617-354-7161 (fax)