INT 02 - external hardware - NON-MASKABLE INTERRUPT
Desc:   generated by the CPU when the input to the NMI pin is asserted
Notes:  return address points to start of interrupted instruction on 80286+
        although the Intel documentation states that this interrupt is
          typically used for power-failure procedures, it has many other uses
          on IBM-compatible machines:
                Memory parity error: all except Jr, CONV, and some machines
                                without memory parity
                Breakout switch on hardware debuggers
                Coprocessor interrupt: all except Jr and CONV
                Keyboard interrupt: Jr, CONV
                I/O channel check: CONV, PS50+
                Disk-controller power-on request: CONV
                System suspend: CONV
                Real-time clock: CONV
                System watch-dog timer, time-out interrupt: PS50+
                DMA timer time-out interrupt: PS50+
                Low battery: HP 95LX
                Module pulled: HP 95LX