non-maskable interrupt; NMI
A hardware interrupt that cannot be ignored or disabled by the CPU's interrupt mask. Used in low-level system contexts.
Non-maskable interrupts are used to signal critical hardware errors.
General term for 'interrupt'; マスク不可能割り込み specifies a type that cannot be masked.
Maskable interrupt, which can be temporarily disabled by the CPU.
Compound of マスク (mask) + 不可能 (impossible) + 割り込み (interrupt), a direct translation of the English computing term 'non-maskable interrupt'.