0040h:0072h           Reset State Flag

    Length: 2 bytes

    Indicates what the machine is to do in the event of a reset.

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        Value        Meaning
        1234h        Skip memory test
        5678h        System Suspended             (PC Convertible)
        9ABCh        Manufacturing Test Mode      (PC Convertible)
        ABCDh        POST Loop Mode               (PC Convertible)

    When the user hits Ctrl-Alt-Del sequence, this word is set to
    1234h and control is transferred to the power-on routine, which
    initializes and tests various hardware devices. This word is then
    tested to see if it has the value 1234h; if it does, the lengthy
    memory test is skipped and the system is rebooted.

    The PC Convertible added three new modes for this word. The first
    is the System Suspended mode. This mode is triggered when the
    machine is recovering from a suspended power-off state. If this is
    the case, the memory test is skipped, devices are restored to
    their previous states, and control is transferred to the program
    that was suspended. The other two new modes are not useful to the
    user.