Thanks to everyone who gave pointers to NeoMagic drivers.
(If it wasn't clear, I was looking for a server with Neomagic support
that would run on a 1.4.1 a.out userland with a -current kernel, with
wsmouse. The snapshot of 3.3.5 built under 1.4.1 worked just fine.)

Now. Any chance of an audio driver for the audio side of the
NeoMagic 256AV?