Int 7F Fn 39  - Alloy Mw386 - Set Terminal Driver For Another User         [N]

   AH = 39h
   AL = new terminal driver number
       FFh dummy driver
       FEh current driver
       FDh load new driver
       DS:SI -> new driver
   DL = user number (FFh = caller)
   DH = machine number if DL <> FFh

Return: CF set if invalid user number
   CF clear if successful

Notes: only available to supervisors
   the new driver number will not take effect until the user is rebooted

See Also: AH=38h