Turning the NES into a thermometer using the PPU's $2002 open-bus decay
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. 0 comments on Hacker News.
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.
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. 0 comments on Hacker News.
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.
Hacker News story: Turning the NES into a thermometer using the PPU's $2002 open-bus decay
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July 20, 2026
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