wsfb - video driver for wsdisplay framebuffer device
Section "Device"
  Identifier "devname"
  Driver "wsfb"
  ...
EndSection
wsfb is an Xorg driver for OpenBSD and NetBSD wsdisplay framebuffer
  devices. This is a non-accelerated driver. The following framebuffer depths
  are supported: 1, 8, 16 and 24, given that the wsdisplay device underneath
  supports them.
A StaticGray monochrome visual is provided for depth 1, all visual types are
  supported for depth 8 and a TrueColor visual is supported for the other
  depths. Multi-head configurations are supported.
The wsfb driver supports all hardware where a wsdisplay framebuffer
  driver is available on OpenBSD and NetBSD. On OpenBSD, currently this includes
  OpenBSD/macppc, OpenBSD/sgi, OpenBSD/sparc, OpenBSD/sparc64 and OpenBSD/alpha
  on TGA graphics cards. It also supports NetBSD/i386 using wsdisplay on
  vesafb(4).
Please refer to xorg.conf(5) for general configuration details. This section
  only covers configuration details specific to this driver.
For this driver it is not required to specify modes in the
    Screen section of the configuration file. The wsfb driver
    picks up the currently used video mode from the framebuffer driver and uses
    it. Video modes specifications in the configuration file are ignored.
The following driver options are supported in the Device
    section:
  - Option "device" "string"
- The wsdisplay framebuffer device to use. Default for OpenBSD:
      /dev/ttyC0. Default for NetBSD: /dev/ttyE0.
- Option "ShadowFB" "boolean"
- Enable or disable use of the shadow framebuffer layer. See shadowfb(4) for
      further information. Default: on for depths were it is supported, off
      otherwise.
    
 ShadowFB is currently not supported on monochrome displays.
- Option "Rotate" "string"
- Enable rotation of the display. The supported values are "CW"
      (clockwise, 90 degrees), "UD" (upside down, 180 degrees) and
      "CCW" (counter clockwise, 270 degrees). Implies use of the
      shadow framebuffer layer. Default: off.
Xorg(1), xorg.conf(5), Xserver(1), X(7), wsdisplay(4)
Authors include: Matthieu Herrb, Gerd Knorr, Michel Dänzer, Geert
  Uytterhoeven