_iEnable()

         Allows the maskable interruptions

    Syntax:

         _iEnable() -> Nil

    Description:

         Allows the mascarable interrupts. It does not have effect if the
         mascarable interrupts are allow yet.
         Must be call after a _iDisable() when you want to allow the
         interrupts again.

    Return:

         Nothing.

    Example:

         _iDisable()
         For nInd := 1 To 100
           NullFunc()               // in this process the VMM is stop
         Next
         _iEnable()