Int 2F Fn 160F  U - Ms-dos 7 Kernel - Get/set ??? Handler                  [D]

   AX = 160Fh
   BL = subfunction
       00h get ??? handler

       Return: AX = 0000h if supported
               CX:DX -> handler to which control is passed after
                     ??? executes
       01h set ??? handler
       CX:DX -> new handler for ???

       Return: AX = 0000h if supported

Notes: this function is not supported if ??? in the IO.SYS drivers portion of
     the kernel is an IRET instruction (as is the case on my system)
     rather than a FAR JMP
   the indicated handler seems to be related to INT 10 processing

See Also: AX=160Eh,AX=1611h,AX=1614h