NAME
tdvfb —
3Dfx Voodoo Graphics / Voodoo 2
framebuffer driver
SYNOPSIS
tdvfb* at pci?
wsdisplay* at tdvfb?
options TDVFB_CONSOLE
DESCRIPTION
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.
SEE ALSO
genfb(4),
voodoofb(4),
wsdisplay(4)
3Dfx Interactive, Inc.,
Voodoo2 Graphics Engine for 3D Game Acceleration,
Revision 1.16, December 1,
1999.
HISTORY
The
tdvfb device first appeared in
NetBSD
7.0.
AUTHORS
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.
BUGS
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 interface.
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 problem).