Copyright (c) 2012 Radoslaw Kujawa
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.Dd July 19, 2012 .Dt TDVFB 4 .Os .Sh NAME .Nm tdvfb .Nd 3Dfx Voodoo 2 framebuffer driver .Sh SYNOPSIS .Cd "tdvfb* at pci?" .Cd "wsdisplay* at tdvfb?" .Cd "options TDVFB_CONSOLE" .Sh DESCRIPTION The .Nm driver provides support for the 3Dfx Voodoo 2 graphics card and provides an interface for machine independent .Xr wscons 4 driver.
p Since Voodoo2 was originally designed as a 3D-only solution, most boards do not have any kind of firmware. The .Nm driver is albe to do low level initialization (boot) of the board, which means that it can be used on all architectures and is truly machine independent. However, it also means that driver is can not detect automatically if Voodoo2 is used as a console. .Dv TDVFB_CONSOLE option is provided and should be set if the .Nm driver is intended to be used as a console. .Sh SEE ALSO .Xr genfb 4 , .Xr voodoofb 4 , .Xr wsdisplay 4 .Rs .%A 3Dfx Interactive, Inc. .%T Voodoo2 Graphics Engine for 3D Game Acceleration .%N Revision 1.16 .%D December 1, 1999 .Re .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Radoslaw Kujawa . 3Dfx Glide 2.x source code, Linux driver by .An Ghozlane Toumi were used as reference. The .Xr wscons 4 attachment code is based mostly on a .Xr genfb 4 driver by .An Michael Lorenz . .Sh BUGS The .Nm driver is unaccelerated. 3Dfx Voodoo2 has a simple 2D graphics engine but it is unsupported yet.
p Video mode is hard coded to 800x600 at 60Hz in 32-bits, it should be selectable at least via kernel configuration file. It is not possibe to detect what resolutions are supported by the monitor, since Voodoo2 has no DDC interface.
p 8-bit depth is not supported by the hardware. 16-bit depth is supported by the hardware and is a prefered depth, however it does not work corretly at the moment (this is a driver problem).