Int 10 Fn 4F06  - VESA SuperVGA BIOS V1.1+ - Get/set Logical Scan Line Le  [V]

   AX = 4F06h
   BL = function
       00h set scan line length
       CX = desired width in pixels
       01h get scan line length

Return: AL = 4Fh if function supported
   AH = status
       00h successful
       01h failed
   BX = bytes per scan line
   CX = number of pixels per scan line
   DX = maximum number of scan lines

Notes: if the desired width is not achievable, the next larger width will be
     set
   the scan line may be wider than the visible area of the screen
   this function is valid in text modes, provided that values are
     multiplied by the character cell width/height

See Also: AX=4F01h,AX=4F05h,AX=4F07h