I use the following on a 560X:
# File generated by XConfigurator.

# **********************************************************************
# Refer to the XF86Config(4/5) man page for details about the format of 
# this file.
# **********************************************************************

# **********************************************************************
# Files section.  This allows default font and rgb paths to be set
# **********************************************************************

Section "Files"

# The location of the RGB database.  Note, this is the name of the
# file minus the extension (like ".txt" or ".db").  There is normally
# no need to change the default.

    RgbPath	"/usr/X11R6/lib/X11/rgb"

# Multiple FontPath entries are allowed (they are concatenated together)

    FontPath	"/usr/X11R6/lib/X11/fonts/misc/"
    FontPath	"/usr/X11R6/lib/X11/fonts/Type1/"
    FontPath	"/usr/X11R6/lib/X11/fonts/Speedo/"
    FontPath	"/usr/X11R6/lib/X11/fonts/75dpi/"
    FontPath	"/usr/X11R6/lib/X11/fonts/100dpi/"

EndSection

# **********************************************************************
# Server flags section.
# **********************************************************************

Section "ServerFlags"

    # Uncomment this to cause a core dump at the spot where a signal is 
    # received.  This may leave the console in an unusable state, but may
    # provide a better stack trace in the core dump to aid in debugging
    #NoTrapSignals

    # Uncomment this to disable the <Crtl><Alt><BS> server abort sequence
    # This allows clients to receive this key event.
    #DontZap

    # Uncomment this to disable the <Crtl><Alt><KP_+>/<KP_-> mode switching
    # sequences.  This allows clients to receive these key events.
    #DontZoom

EndSection

# **********************************************************************
# Input devices
# **********************************************************************

# **********************************************************************
# Keyboard section
# **********************************************************************

Section "Keyboard"

    Protocol    "Standard"

    # when using XQUEUE, comment out the above line, and uncomment the
    # following line
    #Protocol   "Xqueue"

    AutoRepeat  500 5

    # Let the server do the NumLock processing.  This should only be 
    # required when using pre-R6 clients
    #ServerNumLock

    # Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
    #Xleds      1 2 3

    #To set the LeftAlt to Meta, RightAlt key to ModeShift, 
    #RightCtl key to Compose, and ScrollLock key to ModeLock:

    LeftAlt        Meta
    RightAlt        Meta
   ScrollLock      Compose
   RightCtl        Control

# To disable the XKEYBOARD extension, uncomment XkbDisable.

#    XkbDisable

# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults).  For example, for a non-U.S.
# keyboard, you will probably want to use:
#    XkbModel    "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
#    XkbModel    "microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
#    XkbLayout   "de"
# or:
#    XkbLayout   "de"
#    XkbVariant  "nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
#    XkbOptions  "ctrl:swapcaps"

# These are the default XKB settings for XFree86
#    XkbRules    "xfree86"
#    XkbModel    "pc101"
#    XkbLayout   "us"
#    XkbVariant  ""
#    XkbOptions  ""

   XkbKeycodes     "xfree86"
   XkbTypes        "default"
   XkbCompat       "default"
   XkbSymbols      "us(pc101)"
   XkbGeometry     "pc"
   XkbRules        "xfree86"
   XkbModel        "pc101"
    XkbLayout       "us"
EndSection

# **********************************************************************
# Pointer section
# **********************************************************************

Section "Pointer"
#   Protocol    "PS/2"
#    Protocol    "Busmouse"
    Protocol    "wsmouse"
    Device      "/dev/mouse"

# When using XQUEUE, comment out the above two lines, and uncomment
# the following line.

#    Protocol	"Xqueue"

# Baudrate and SampleRate are only for some Logitech mice

#    BaudRate	9600
#    SampleRate	150

# Emulate3Buttons is an option for 2-button Microsoft mice
# Emulate3Timeout is the timeout in milliseconds (default is 50ms)

    Emulate3Buttons
    Emulate3Timeout    50

# ChordMiddle is an option for some 3-button Logitech mice

#    ChordMiddle

EndSection


# **********************************************************************
# Monitor section
# **********************************************************************

# Any number of monitor sections may be present

Section "Monitor"

    Identifier  "LCD Panel 800x600"
    VendorName  "Unknown"
    ModelName   "Unknown"

# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

    HorizSync   31.5-60.9

# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

    VertRefresh 50-100

# Modes can be specified in two formats.  A compact one-line format, or
# a multi-line format.

# These two are equivalent

#    ModeLine "1024x768i" 45 1024 1048 1208 1264 768 776 784 817 Interlace

#    Mode "1024x768i"
#        DotClock	45
#        HTimings	1024 1048 1208 1264
#        VTimings	768 776 784 817
#        Flags		"Interlace"
#    EndMode

# This is a set of standard mode timings. Modes that are out of monitor spec
# are automatically deleted by the server (provided the HorizSync and
# VertRefresh lines are correct), so there's no immediate need to
# delete mode timings (unless particular mode timings don't work on your
# monitor). With these modes, the best standard mode that your monitor
# and video card can support for a given resolution is automatically
# used.

# 640x400 @ 70 Hz, 31.5 kHz hsync
Modeline "640x400"     25.175 640  664  760  800   400  409  411  450
# 640x480 @ 60 Hz, 31.5 kHz hsync
Modeline "640x480"     25.175 640  664  760  800   480  491  493  525
# 800x600 @ 56 Hz, 35.15 kHz hsync
ModeLine "800x600"     36     800  824  896 1024   600  601  603  625
ModeLine "800x600"     40     800  856  1040 1056   600  600  626  628 +hsync +vsync
# 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync
#Modeline "1024x768"    44.9  1024 1048 1208 1264   768  776  784  817 Interlace

# 640x480 @ 72 Hz, 36.5 kHz hsync
Modeline "640x480"     31.5   640  680  720  864   480  488  491  521
# 800x600 @ 60 Hz, 37.8 kHz hsync
Modeline "800x600"     40     800  840  968 1056   600  601  605  628 +hsync +vsync

# 800x600 @ 72 Hz, 48.0 kHz hsync
Modeline "800x600"     50     800  856  976 1040   600  637  643  666 +hsync +vsync
# 1024x768 @ 60 Hz, 48.4 kHz hsync
Modeline "1024x768"    65    1024 1032 1176 1344   768  771  777  806 -hsync -vsync

# 1024x768 @ 70 Hz, 56.5 kHz hsync
Modeline "1024x768"    75    1024 1048 1184 1328   768  771  777  806 -hsync -vsync
# 1280x1024 @ 87 Hz interlaced, 51 kHz hsync
#Modeline "1280x1024"   80    1280 1296 1512 1568  1024 1025 1037 1165 Interlace

# 1024x768 @ 76 Hz, 62.5 kHz hsync
Modeline "1024x768"    85    1024 1032 1152 1360   768  784  787  823
# 1280x1024 @ 61 Hz, 64.2 kHz hsync
Modeline "1280x1024"  110    1280 1328 1512 1712  1024 1025 1028 1054

# 1280x1024 @ 74 Hz, 78.85 kHz hsync
Modeline "1280x1024"  135    1280 1312 1456 1712  1024 1027 1030 1064

# 1280x1024 @ 76 Hz, 81.13 kHz hsync
Modeline "1280x1024"  135    1280 1312 1416 1664  1024 1027 1030 1064

# Low-res Doublescan modes
# If your chipset does not support doublescan, you get a 'squashed'
# resolution like 320x400.

# 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio
Modeline "320x200"     12.588 320  336  384  400   200  204  205  225 Doublescan
# 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio
Modeline "320x240"     12.588 320  336  384  400   240  245  246  262 Doublescan
# 320x240 @ 72 Hz, 36.5 kHz hsync
Modeline "320x240"     15.750 320  336  384  400   240  244  246  262 Doublescan
# 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio
ModeLine "400x300"     18     400  416  448  512   300  301  602  312 Doublescan
# 400x300 @ 60 Hz, 37.8 kHz hsync
Modeline "400x300"     20     400  416  480  528   300  301  303  314 Doublescan
# 400x300 @ 72 Hz, 48.0 kHz hsync
Modeline "400x300"     25     400  424  488  520   300  319  322  333 Doublescan
# 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio
ModeLine "480x300"     21.656 480  496  536  616   300  301  302  312 Doublescan
# 480x300 @ 60 Hz, 37.8 kHz hsync
Modeline "480x300"     23.890 480  496  576  632   300  301  303  314 Doublescan
# 480x300 @ 63 Hz, 39.6 kHz hsync
Modeline "480x300"     25     480  496  576  632   300  301  303  314 Doublescan
# 480x300 @ 72 Hz, 48.0 kHz hsync
Modeline "480x300"     29.952 480  504  584  624   300  319  322  333 Doublescan

EndSection


# **********************************************************************
# Graphics device section
# **********************************************************************

# Any number of graphics device sections may be present

Section "Device"
    Identifier        "Generic VGA"
    VendorName        "Unknown"
    BoardName "Unknown"
    Chipset   "generic"

#    VideoRam 256

#    Clocks   25.2 28.3

EndSection

# Device configured by Xconfigurator:

Section "Device"
    Identifier  "My Video Card"
    VendorName  "Unknown"
    BoardName   "Unknown"
    #VideoRam    2048
#    Chipset    "NM2160"
#    IOBase     0xfea00000
#    MemBase    0xfd000000
#    VideoRam   2048
#    DacSpeed   90
#    Option     "linear"
#    Option     "nolinear"
#    Option     "sw_cursor"
#    Option     "hw_cursor"
#    Option     "no_accel"
#    Option     "intern_disp"
#    Option     "extern_disp"
#    Option     "mmio"
#    Option     "no_mmio"
#    Option     "lcd_center"
#    Option     "no_stretch"
    # Insert Clocks lines here if appropriate
EndSection


# **********************************************************************
# Screen sections
# **********************************************************************

# The Colour SVGA server

Section "Screen"
    Driver      "svga"
    # Use Device "Generic VGA" for Standard VGA 320x200x256
    #Device      "Generic VGA"
    Device      "My Video Card"
    Monitor     "LCD Panel 800x600"

#    Subsection "Display"
#       Modes       "800x600"
#       ViewPort    0 0
#       Virtual     800 600
#    EndSubsection

 SubSection "Display"
       Depth        24
       Modes       "800x600"
       ViewPort    0 0
       Virtual     800 600
 EndSubSection

# SubSection "Display"
#       Depth        8
#       Modes       "800x600"
#       ViewPort    0 0
#       Virtual     800 600
# EndSubSection

# SubSection "Display"
#       Depth        16
#       Modes       "800x600"
#       ViewPort    0 0
#       Virtual     800 600
# EndSubSection

EndSection

# The 16-color VGA server

Section "Screen"
    Driver      "vga16"
    Device      "Generic VGA"
    Monitor     "LCD Panel 800x600"
    Subsection "Display"
        Modes       "640x480" "800x600"
        ViewPort    0 0
        Virtual     800 600
    EndSubsection
EndSection

# The Mono server

Section "Screen"
    Driver      "vga2"
    Device      "Generic VGA"
    Monitor     "LCD Panel 800x600"
    Subsection "Display"
        Modes       "640x480" "800x600"
        ViewPort    0 0
        Virtual     800 600
    EndSubsection
EndSection

# The accelerated servers (S3, Mach32, Mach8, 8514, P9000, AGX, W32, Mach64
# I128, and S3V)
Section "Screen"
    Driver      "accel"
    Device      "My Video Card"
    Monitor     "LCD Panel 800x600"
EndSection



-- 
Phil Nelson                    NetBSD: http://www.netbsd.org
e-mail: phil@cs.wwu.edu        Coda: http://www.coda.cs.cmu.edu
http://www.cs.wwu.edu/~phil