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  Interrupt:   04h
 
  Title:       Arithmetic Overflow Error
 
  See also:    INTO
 
  Description:                                          [PC] [AT] [PS/2]
 
     Invoked when the processor executes the INTO instruction
     (Interrupt on Overflow) when the overflow flag is set. If the
     overflow flag is clear, this instruction has no effect.
 
     This interrupt should not be called directly. Default service is
     interrupt return (IRET). To trap overflow errors, a program must
     set up a handler routine to gain control when the interrupt
     occurs.
 
     Input     Output
 
     None      None
                                    -♦-