Wiki article about test mode (etc) functionality in Gameboy SoCs

[nitro2k01]

I got tired of having this information spread out in a bunch of different pages, so I've tried collect it all on my wiki. This is still a work in progress, and likely has errors and missing information. If you know something that's missing, incorrect, or if someone who contributed to this kind of research is not credited in the last section, please let me know.

https://gbdev.gg8.se/wiki/articles/Game ... d_features