The video-adapter SiS 630 AGP is not supported by the Linux-Kernel directly. To use the X-Windows-System anyway you have to install the framebuffer-device-driver.

1. Update your system to XFree86 Version 4.01 by installing the following packages if necessary.
   (e. g. download at ftp://ftp.suse.com/pub/suse/i386/X/XFree86/XFree86-4.0.1-SuSE/suse70/)

   
   saxtools-2.0-65.i386.rpm
   xfntcyr-4.0.1-5.i386.rpm
   xdevel-4.0.1-5.i386.rpm
   xfntscl-4.0.1-5.i386.rpm
   xfntbig-4.0.1-5.i386.rpm
   xextra-4.0.1-5.i386.rpm
   xloader-4.0.1-5.i386.rpm
   xf86-4.0.1-5.i386.rpm
   xman-4.0.1-5.i386.rpm
   km_drm-4.0.1-5.i386.rpm
   xf86_glx-4.0.1-5.i386.rpm
   xmodules-4.0.1-5.i386.rpm
   xf86glxd-4.0.1-5.i386.rpm
   xshared-4.0.1-5.i386.rpm
   sax2-4.0-65.i386.rpm
   xfnt100-4.0.1-5.i386.rpm
   xxprt-4.0.1-5.i386.rpm
   sax2-4.0-65.src.rpm

   To avoid any conflicts first remove the old packages and then install the new ones!
   
   
2. Boot your system in graphic-mode by adding in your /etc/lilo.conf the following line:
   vga=791
   This is for 1024x768 at 16bit. Other possible values are:
   

   Colordepth	640x480	800x600	1024x768	1280x1024
   8bit	769	771	773	775
   15bit	784	787	790	793
   16bit	785	788	791	794
   24bit	786	789	792	775

   
   
   This could be your /etc/lilo.conf:

   # LILO configuration file
   # Start LILO global Section
   initrd=/boot/initrd
   boot=/dev/hda
   #compact      # faster, but won't work on all systems.
   vga=791        #this is for graphic-mode
   read-only
   prompt
   timeout=50
   # End LILO global Section
   #
   image = /boot/vmlinuz
     root = /dev/hda4
     label = l

   Remember to run lilo to apply the changes!
   
   
3. On SuSE7.0-systems run sax2 -m 0=fbdev to start SaX2 in framebuffermode. Now you can configure your XF86Config.
   OR: You can edit the /etc/XF86Config - file manually. If you want, you can try my XF86Config
   The important lines are:

   Section "Modes"
     Identifier  "Modes[0]"
     Modeline  "1024x768" 66.24 1024 1064 1248 1360 768 783 790 829
   EndSection

   Section "Screen"
     DefaultDepth 16
     SubSection "Display"
       Depth 16
       Modes   "default"
     EndSubSection
     Device   "Device[0]"
     Identifier   "Screen[0]"
     Monitor   "Monitor[0]"
   EndSection

   Section "Device"
     BoardName   "SIS630"
     BusID   "1:0:0"
     Driver   "fbdev"
     Identifier   "Device[0]"
     VendorName   "SiS"
   EndSection

4. Now the X-Window-System can be startet without any problems.
   Good Luck!