The 3DFX card to use can be optionally specified as a cardinal number minus one. (e.g. "0" means the first card, "1" the second, etc.)
specifies the maximum update frequency your monitor can handle (in Hz). Default is 70Hz.
specifies the maximum horizontal frequency your monitor can handle (in kHz). Default is 48kHz.
if this is set applications will be halted on console switchaway. The default is to continue running.