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- The non-maskable interrupt (NMI) is a special hardware interrupt that is connected to the NMI pin of the CPU. The NMI is assigned an interrupt number of 2, although, since it cannot be masked by other interrupts, it effectively has the highest priority and is designed to be recognised in the shortest possible time.
Non-maskable interrupt
A non-maskable interrupt (NMI) is a hardware interrupt that cannot be ignored by standard interrupt masking techniques in the system. An NMI is often used when response time is critical or when an interrupt should never be disabled during normal system operation.
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In computing, a non-maskable interrupt (NMI) is a hardware interrupt that standard interrupt-masking techniques in the system cannot ignore. It typically occurs to signal attention for non-recoverable hardware errors. Some NMIs may be masked, but only by using proprietary methods specific to the particular NMI. … See more
In older architectures, NMIs were used for interrupts which were typically never disabled because of the required response time. They were hidden signals. Examples include the floppy disk controller on the Amstrad PCW, … See more
1. ^ "8.7.2: MS-DOS* Compatibility Sub-mode". Intel® 64 and IA-32 Architectures Software Developer's Manual. Vol. 1. Intel Corporation. June 2013. p. 8–31.
2. ^ "How to generate a complete crash dump file or a kernel crash dump file by using an NMI on a Windows-based system" See more• "Dump Switch Support for Windows". Microsoft Developer Network. 2001-12-04. Archived from the original on 2012-10-26. Retrieved 2013-08-31. See more
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