THANK YOU XFree86 Developers.
XFree86 3.1.2D works fine with my Trident 9660.
One minor problem which I was not able to solve with
xvidtune is that the viewing area does not take up
the entire screen (i.e significant black edges).
Anyway I'm not complining.
AT&T Bell Laboratories
Rm 3L-611, 101 Crawfords Corner Rd, P.O. Box 3030, Holmdel, NJ 07733