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INT 15h,  82h (130)      Device Program Termination                      many

    Provides an interface to discontinue the use of a device by all
    processes currently using the device.

       On entry:      AH         82h
                      BX         Device ID

       Returns:       Carry      Set if service not supported, else cleared

  --------------------------------------------------------------------------

       Notes:         The PC, PCjr, and the XT dated 11/08/82 do not
                      support this service.

                      This interface is supported for multi-tasking
                      environments, where more than one process (or task)
                      may be executing in the system. Usually the
                      operating system will supply the handler for this
                      service; this way, the operating system can keep
                      track of which process is using each device on the
                      system.

                      The operating system will use this service to
                      discontinue the use of a device by all processes
                      currently using the device.