BWONE(4S)

NAME
bwone - Sun-1 black and white frame buffer

CONFIG — SUN-2 SYSTEM
device bwone0 at mbmem ? csr 0xc0000 priority 3

DESCRIPTION

The bwone interface provides access to Sun-1 system black and white graphics controller boards. It supports the ioctls described in fbio(4S).

FILES
/dev/bwone[0-9]

SEE ALSO
mmap(2), fb(4S), fbio(4S)

BUGS
Use of vertical-retrace interrupts is not supported.

The video state returned by the FBIOGVIDEO ioctl may be incorrect. It is not possible for the driver to determine the state of the hardware video enable bit, so it reports the last state stored by the FBIOSVIDEO ioctl. User processes which map the frame buffer can directly enable or disable the video, unknown to the driver.