So my Quicksilver system finally showed up today (A deal long in the making!) and when I opened it up found a surprise. The machine is setup with a 90-4440 AGPTV board as was expected but for a 2D device there was a Ventana 50 Voodoo Rush!
Doing some digging around I found these links-
http://www.quantum3d.com/press/HTMLarchive/3-27-98.htmlhttp://www.quantum3d.com/press/HTMLarchive/9-17-98.htmlhttp://web.archive.org/web/19991109093407/http://quantum3d.com/support/drivers.h... If I had to guess I think what happened was Quantum3D took some spare Ventana boards they had lying around, reflashed them for 2D only operation and sold them included with arcade hardware.
Here is a blurb from the Quantum3D web archive link above.
"There is another accelerator which also uses the ProMotion AT25 Alliance Semiconductor chipset. However, it is not a daughter board rather a normal PCI board. The accelerator is called MGV-PCI.
The MGV Rush populated board is similar to the MGV-PCI but has the 3D addition which is not used. It may some times be confused with Ventana board which has TV Out and 3D chips populating the board in a Voodoo Rush configuration. However, the MGV Rush board only uses the Alliance chip for 2D display and the 3D portion will not function.
The Ventana Rush may look similar to the MGV Rush populated board but has the Chrontel chipset used for TV Out. The accelerator has 3D chips populating the board in a Voodoo Rush configuration. In addition, the accelerator may have "Ventana" silk screened onto the board near the Quantum3D logo. This board was never sold for public use nor was it released as a product."
Below is pictures of the bios on boot up and picture of both cards.
The board does function under 3D somewhat when the Rush single plane drivers are loaded. Turok worked fine but both GLQuake and Quake II had some texture image issues with the MGV-PCI. Might be fixed with a reflash to the Ventana 50 bios but I have no plans to do so.
More Quicksilver pictures can be seen here-
http://www.3dfx.ch/gallery/album117