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Thank you.

TDVFB(4)                   Kernel Interfaces Manual                   TDVFB(4)

     tdvfb -- 3Dfx Voodoo Graphics / Voodoo 2 framebuffer driver

     tdvfb* at pci?
     wsdisplay* at tdvfb?
     options TDVFB_CONSOLE

     The tdvfb driver provides support for the graphics cards based on 3Dfx
     Voodoo Graphics (SST-1) and 3Dfx Voodoo2 (CVG) chipsets and provides an
     interface for the machine independent wscons(4) driver.

     Since both Voodoo Graphics and Voodoo2 were originally designed as a 3D-
     only solutions, most boards do not have any kind of firmware.  The tdvfb
     driver is able 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 cannot detect
     automatically if the card is used as a console.  The TDVFB_CONSOLE option
     is provided and should be set if the tdvfb driver is intended to be used
     as a console.

     genfb(4), voodoofb(4), wsdisplay(4)

     3Dfx Interactive, Inc., Voodoo2 Graphics Engine for 3D Game Acceleration,
     Revision 1.16, December 1, 1999.

     The tdvfb device first appeared in NetBSD 7.0.

     The tdvfb driver was written by Radoslaw Kujawa.  3Dfx Glide 2.x source
     code, Linux driver by Ghozlane Toumi were used as reference.  The
     wscons(4) attachment code is based mostly on the genfb(4) driver by
     Michael Lorenz.

     3Dfx Voodoo2 has a simple 2D graphics engine.  The tdvfb driver has
     minimal support for this engine.  It is activated only when the card is
     running in a 16-bit mode (this is a hardware limitation).

     Video mode is hard-coded to 800x600 at 60Hz.  Default bit depth for
     little endian machines is 16-bit, for big endian machines it is 32-bit.
     Resolution and depth should be selectable at least via kernel
     configuration file.  It is not possible to detect what resolutions are
     supported by the monitor, since Voodoo Graphics and Voodoo2 have no DDC

     8-bit depth is not supported by the hardware.  16-bit depth is supported
     by the hardware and is the preferred depth, however it does not work
     correctly on big endian machines at the moment (this is a driver

     Sometimes the driver fails to detect RAMDAC.

NetBSD 7.1.2                    August 3, 2012                    NetBSD 7.1.2