Int 2F Fn 1690  U - Ms-dos 7 Kernel - Get/set ???                          [D]

   AX = 1690h
   ES:BX -> ???

Return: ES:BX -> ??? data (see #2409)

See Also: AX=1611h,AX=1614h

Format of MS-DOS 7 kernel ??? data:
Offset Size    Description (Table 2409)
 00h   DWORD   -> ??? data (appears to list the installed drivers)
 04h   DWORD   -> ??? (value passed in via ES:BX is stored here)