Int 10 Fn 4F03  - Vesa Supervga Bios - Get Current Video Mode              [V]

   AX = 4F03h

Return: AL = 4Fh if function supported
   AH = status
       00h successful
       BX = video mode (see #0081,#0082)
           bit 14: linear frame buffer enabled (VBE v2.0+)
           bit 15: don't clear video memory
       01h failed

See Also: AH=0Fh,AX=4E04h,AX=4F02h