The Tseng chipsets supported by XFree86 are ET3000, ET4000, ET4000/W32 and ET6000. Accelerated features of the ET4000/W32, W32i, W32p and ET6000 are supported by the SVGA driver. For details about the separate accelerated 8bpp (=256 color) ET4000/W32 and ET6000 server, refer to README.W32.
Note that you should NOT be using XF86_W32 unless XF86_SVGA doesn't work on your hardware. No further development is being done on the W32 server; all new efforts go into the SVGA server.
Some ET4000W32 ISA cards are known NOT to work with the SVGA server in this
version (XFree86 3.3.1): they hang the machine... Use the W32 server
XF86_W32 for these cards!