Interrupt management in protected mode operation of Intel 80286 high performance architecture

80286 microprocessors are widely used in their protected modes in the industries for building control circuits. Implementation of the interrupt structure in protected mode is quite different from that of the real mode. The control circuit designers and the academicians prefer to use low-level assembly language programming for the understanding of the interrupt structure and other functional features of the protected mode 80286. Current literatures, textbooks and manuals have not covered much useful information in this regard. This paper accounts background studies and experimentally verified steps for the implementation of the NMI (nonmasksable) interrupt in protected mode. An interested reader could easily apply the methodology of this paper for the implementation of other interrupts.