Also, does the VGA INPUT port function like Voodoo 1/2 ? Since the Cirus Logic 2D card is too weak (512kB RAM).

From manual:

VGA Input Port
The VGA input port allows connection of a VGA device to be used by the system while in VGA graphics mode.
NOTE
When the VGA input port is not used, an on-board VGA device assumes this function. The following table provides the pin connections for the VGA input port

Go here:

http://www.3dlabs.com/content/Legacy/drivers/ … riverSelect.asp

And select "Intense3D" from the products list and "WinNT 4" from the OS list - you should find what you're after. I don't believe Win95 drivers were ever released for the Realizm/Intense3D cards, they were strictly meant for workstations.