GET PHYSICAL DISPLAY PARAMETERS (CONVERTIBLE)

        AH = 15h
Return: AX = alternate display adapter type
        ES:DI = pointer to parameter table
               word 0: monitor model number
                    1: vertical pixels per meter
                    2: horizontal pixels per meter
                    3: total vertical pixels
                    4: total horizontal pixels
                    5: horizontal pixel separation in micrometers
                    6: vertical pixel separation in micrometers