Int 10 Fn D0  U - Video - Hp 100lx/200lx - Set Zoom Mode                   [V]

   AH = D0h
   AL = zoom mode
       02h 80x25 mono
       03h 80x25 color
       80h 64x18 mono
       81h 64x18 color
       82h 40x25 mono
       83h 40x25 color
       84h 40x16 mono
       85h 40x16 color

Return: nothing

Note:  zoom mode can only be changed within zoom modes of the same color
     scheme; if needed, set to mono/color with AH=00h,AL=02h/03h; with
     mono video modes AL=07h or AL=21h only 80x25 and 40x16 will work
   the current zoom mode is stored in the BIOS data area at 0040h:009Fh

See Also: AH=D1h,AH=D4h