INT 10 - VIDEO - READ GRAPHICS PIXEL

	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
SeeAlso: AH=0Ch,AH=47h