D. E. Evans <sinuhe@xmission.com> writes:
>Since my upgrade from XFree86 4.0 and NetBSD 1.5.3 to XFree86 4.1
>(and thereafter.  I'm currenly on 4.3 via Xfree86.org), my Viper
>330 (Riva 128) is no longer functional via the nv driver.  I must
>use the vesa driver to get into X.
...
>Section "Device"
>    Identifier  "Diamond Viper 330"
>    Driver      "nv"
>#    VideoRam    4096
>EndSection

Try changing "nv" to "vesa".