You can start by using a generic SVGA driver.

On Tue, 7 Apr 1998, Paul Goyette wrote:

> OK, I got my system up and running, but I've run into a problem:
> 
> My video card does not seem to be listed in the Cards that xf86config
> knows about.  In fact, the card doesn't even get configured by the
> NetBSD kernel.  It's a STB Systems Velocity 128, with 4MB VRAM, is "AGP
> compatible" and sits on th PCI bus.
> 
tom@iic.net             TEL 612.376.9090 * FAX 612.376.9087