bwtwo - black and white memory frame buffer
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
mmap(2), cgfour(7D), fbio(7I)
Use of vertical-retrace interrupts is not supported.
Man(1) output converted with