INT 10 - VIDEO - GET PHYSICAL DISPLAY PARAMETERS (CONVERTIBLE)
AH = 15h
Return: AX = alternate display adapter type
0000h none
5140h LCD
5153h CGA
5151h mono
ES:DI -> parameter table (see below)

Format of display parameter table:
Offset  Size    Description
00h    WORD    monitor model number
02h    WORD    vertical pixels per meter
04h    WORD    horizontal pixels per meter
06h    WORD    total vertical pixels
08h    WORD    total horizontal pixels
0Ah    WORD    horizontal pixel separation in micrometers
0Ch    WORD    vertical pixel separation in micrometers

See also: 101B

1015 - VIDEO - GET PHYSICAL DISPLAY PARAMETERS (CONVERTIBLE)