rcons —
raster console access
options RASTERCONSOLE_FGCOL=n
options RASTERCONSOLE_BGCOL=n
options RCONS_2BPP
options RCONS_4BPP
options RCONS_16BPP
pseudo-device rasterconsole N
The rcons driver provides support for
  machine-independent access to the raster console. Use of the
  rcons driver is deprecated in favour of the
  wscons(4) machine-independent
  console driver.
The rcons driver provides simple raster
    and frame buffer routines. It's enough to implement a console terminal
    emulator on monochrome and pseudo-colour screens.