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Interrupt Request
From SnesLab
An interrupt request (IRQ) is an interrupt that can be ignored. It has the lowest priority out of all the interrupts. [2]
IRQs can go into the Control Deck through both the Cartridge Slot and the Expansion Port.
The S-SMP has no hardware interrupt sources, but if it did, EI and DI would be useful.
See Also
External Links
- snes9x implementation of IRQ: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2588
- 65c816 datasheet
- https://problemkaputt.de/fullsnes.htm#snesppuinterrupts