Int 33 Fn 0020  - MS Mouse V6.0+ - Enable Mouse Driver                     [M]

   AX = 0020h

Return: AX = status
       0020h successful
       FFFFh unsuccessful

Notes: restores vectors for INT 10h and INT 71h (8086) or INT 74h (286/386)
     which were removed by function 1Fh
   Microsoft's documentation states that no value is returned

See Also: AX=001Fh