/dev/fbs/bwtwo
The bwtwo interface provides access to monochrome memory frame buffers. It supports the ioctls described in fbio(7I).
Reading or writing to the frame buffer is not allowed -- you must use the mmap(2) system call to map the board into your address space.
mmap(2), cgfour(7D), fbio(7I)
Use of vertical-retrace interrupts is not supported.
