Int 10 Fn 0D  - Video - Read Graphics Pixel                                [V]

   AH = 0Dh
   BH = page number
   CX = column
   DX = row

Return: AL = pixel color
Desc:  determine the current color of the specified pixel in grahics modes

Notes: valid only in graphics modes
   BH is ignored if the current video mode supports only one page

See Also: AH=0Ch,AH=47h