Turning the NES into a thermometer using the PPU's $2002 open-bus decay
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I created an NES thermometer.
Reference: https://erspicu.github.io/AprVisual/s1a/aprnes-thermometer-tool.html
The custom version of aprnes included there is an implementation designed to verify the "Open Bus" analog-style rapid simulation; it accepts temperature parameters, allowing the test ROM to measure the temperature via the Open Bus.
Temperature readings may vary across different emulators.
If you have a vintage NES console that exhibits the full characteristics of the Open Bus, you might want to give it a try.
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