ffb is a 24-bit UPA-based color frame buffer and graphics accelerator which comes in the two configurations: single buffered frame and double buffered frame.
- Single buffered frame buffer
- Consists of 32 video memory planes of 1280 x 1024 pixels, including
24-bit single-buffering and 8-bit X planes.
- Double buffered frame buffer
- Consists of 96 video memory planes of 1280 x 1024 pixels, including 24-bit double-buffering, 8-bit X planes, 28-bit Z-buffer planes
and 4-bit Y planes.
The driver supports the following frame buffer ioctls which are defined in fbio(7I):
FBIOPUTCMAP, FBIOGETCMAP, FBIOSVIDEO, FBIOGVIDEO, FBIOVERTICAL,
FBIOSCURSOR, FBIOGCURSOR, FBIOSCURPOS, FBIOGCURPOS, FBIOGCURMAX,