I just added support for Neomagic chipsets to our version of xfree86.
This code comes from js@mnsinc.com, and you can find out more about it
(including sample config files) at:

http://www.mnsinc.com/js/Neomagic.html

A coworker and I have been running it for a while, and it works pretty
well.  It's unaccelerated and I've never tested it with an external
monitor, but it's better than no X at all.  I know people have reported
success running the Linux and FreeBSD X servers under emulation, but
I thought that this might be a useful stopgap alternative.

This should appear after the next SUP update.

--Ken