BIOS Video Mode [0040:0049]
  Basic video modes (CGA, MDA)
  Byte Mode
  ---- -------------------
  00h  40x25 BW      (CGA)
  01h  40x25 color   (CGA)
  02h  80x25 BW      (CGA)
  03h  80x25 color   (CGA)
  04h  320x200 color (CGA)
  05h  320x200 BW    (CGA)
  06h  640x200 BW    (CGA)
  07h  monochrome    (MDA)
  Extended video modes (EGA/MCGA/VGA or other)
  Byte Mode
  ---- -----------------
  08h  lores,16 color
  09h  med res,16 color
  0Ah  hires,4 color
  0Bh  n/a
  0Ch  med res,16 color
  0Dh  hires,16 color
  0Eh  hires,4 color
  0Fh  hires,64 color