I thought the only way to get a program to use Voodoo OpenGL (if it doesn't explicitly support it already) is to put a copy of 3dfxvgl.dll in the game's directory and rename it to opengl32.dll.

As for D3D, there's a program called 3D Control Center that might work.
Re: Bad juju from my SLI Voodoos

As I vaguely recall, it just tosses an extra underscore at the front of some registry key corresponding to the adapter to be disabled, but I forget which key. (You could probably track it down using RegMon.)

Jorpho wrote:

I thought the only way to get a program to use Voodoo OpenGL (if it doesn't explicitly support it already) is to put a copy of 3dfxvgl.dll in the game's directory and rename it to opengl32.dll.

Yeah but that's for 3dfx Voodoo Graphics and Voodoo2 and in the rare cases of not supporting the later ICD driver (or just early games that didn't foresee 3dfx dropping the secondary video thing). VoodooBanshee/3/4/5 being host cards have their ICD as 3dfxogl.dll and installing the driver allows opengl32.dll to redirect to it (other than say, quake2 redirecting opengl calls to 3dfxgl.dll in the quake2 folder for example) so the copying of 3dfxvgl.dll isn't necessary.

In Windows 9x it's Software\Microsoft\Windows\CurrentVersion\OpenGLdrivers

In Windows 7, Video device driver registry keys have string values of OpenGLDriverName/OpenGLVendorName that links to the respective OpenGL driver. not implying that I ever tampered with those to get it start in Microsoft Direct3D or SGI OpenGL anything

Interesting, thanks for the information.

Now I just have to forage for a voodoo 3 to see if I can play old games on windows 7 properly... (bonus my monitor has both VGA and DVI so I can just hit a button to go to VGA and thus the voodoo 3's output)