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NMI /N-M-I/ n.
Non-Maskable Interrupt. An IRQ 7 on the PDP-11 or 680[01234]0; the NMI line on an 80[1234]86. In contrast with a [priority interrupt] (which might be ignored, although that is unlikely), an NMI is never ignored. Except, that is, on [clone] boxes, where NMI is often ignored on the motherboard because flaky hardware can generate many spurious ones.
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