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Non-Maskable Interrupt: Difference between revisions
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A '''non-maskable interrupt''' (NMI) is an interrupt that cannot be ignored. The SNES normally generates an NMI at the beginning of the vertical blanking period, which is received by the Ricoh CPU. | A '''non-maskable interrupt''' (NMI) is an interrupt that cannot be ignored. The SNES normally generates an NMI at the beginning of the vertical blanking period, which is received by the Ricoh CPU. | ||
NMIs have higher priority than [[IRQ]]s, but lower priority than Reset. | |||
=== References === | |||
* 7.19 Interrupt Priorities, page 53: https://www.westerndesigncenter.com/wdc/documentation/w65c816s.pdf | |||
Revision as of 22:21, 7 May 2023
A non-maskable interrupt (NMI) is an interrupt that cannot be ignored. The SNES normally generates an NMI at the beginning of the vertical blanking period, which is received by the Ricoh CPU.
NMIs have higher priority than IRQs, but lower priority than Reset.
References
- 7.19 Interrupt Priorities, page 53: https://www.westerndesigncenter.com/wdc/documentation/w65c816s.pdf