cgfourteen —
Sun accelerated 8/24-bit color frame buffer
The cgfourteen is a memory based color frame buffer,
  with graphics acceleration and overlay capabilities. Its pixel memory can be
  mapped into a user process address space by using the
  mmap(2) system call. The
  cgfourteen driver supports the minimal ioctl's needed
  to run Xorg(1).
The driver operates by default in
    sparc/cgthree(4)
    emulation mode, i.e. in 8-bit unaccelerated mode. This emulation does
    include support for the hardware cursor present on the
    cgfourteen, however.