INT 08 - CPU-generated (80286+) - DOUBLE EXCEPTION DETECTED
Desc:   called when multiple exceptions occur on one instruction, or an
          exception occurs in an exception handler
Notes:  called in protected mode if an interrupt above the defined limit of
          the interrupt vector table occurs
        return address points at beginning of instruction with errors or the
          beginning of the instruction which was about to execute when the
          external interrupt caused the exception
        if an exception occurs in the double fault handler, the CPU goes into
          SHUTDOWN mode (which circuitry in the PC/AT converts to a reset);
          this "triple fault" is a faster way of returning to real mode on
          many 80286 machines than the standard keyboard controller reset