It might also be worth trying ESP32's assembly high-level interrupts. I've never used them personally, but they can allegedly give interrupt latencies that are significantly lower than the ~2us for regular ESP32 C interrupts. See: https://esp32.com/viewtopic.php?t=422 See: https://docs.espressif.co...

Thanks everyone for the feedback. I appreciate it, and the suggestions for alternate methods of doing what I need. Cheers!

Can the ESP32 read the databus in less than a nanosecond after a external interrupt is triggered? I have an Apple II that operates at 1 MHz. When the DEVSEL line on the Apple II goes low, I want to read the databus. I have tried this with the arduino ide, but it doesn't work and I believe this is be...