Axlen has updated his site with the following information:

“This is the port of the Manchester Nurbs Library done about two months ago. It was used in 3D Invaders to make the donut shaped “Invaders” (place holders really). The included example code works under KOS-CVS, but I’ve included a patch for KOS-1.1.7 to fix GL_POINTS and an obscure texture bug. For those of you with the binary release of KOS-1.1.7 I’ve included binaries for the libgl and libnurbs libraries.“

The DCNurbs lib source & examples can be downloaded from Axlen’s Hermitage.