Well, I don't think that this is a hardware-problem, because it worked
well with Mesa 3.4. It is true that Voodoo1 had only 4MB ram in total,
which was shared for framebuffer ans textures (I think 2MB for each).
Voodoo2 has 12MB - 8MB for textures and 4MB for framebuffer. That should
be enough to run 800x600 in 16bit with 16bit Z-buffer, which was my
So I still think, that it's a software problem.