Int 33 Fn 256C  - Logitech Mouse - Set Parameters - Set Emulation (serial  [M]

   AX = 256Ch
   BX = 0001h
   CX = emulation type (see #2862)

Return: AX = FFFFh if driver installed for serial mouse

See Also: AX=246Ch,AX=256Ch/BX=0000h,AX=256Ch/BX=0003h,AX=276Ch

(Table 2862)
Values for Logitech mouse emulation type:
 00h   5 byte packed binary
 01h   3 byte packed binary
 02h   hexadecimal
 03h   relative bit pad
 04h   not supported
 05h   MM Series
 06h   not supported
 07h   Microsoft