This is really amazing, thanks for sharing! How did you know which pins to look at? And do you know what the other pins do? I’m super curious now, and actually

This is really amazing, thanks for sharing! How did you know which pins to look at? And do you know what the other pins do? I’m super curious now, and actually have an original gameboy which I now want to open up :-) I wonder if these same signals can be used to make an adapter to connect an external screen.