Academy of Sciences of Heroesland

Perhaps I misunderstood, but then it turns out that we don't directly control this computer, but rather we set its parameters during its assembly.

Well, this is simply the most illustrative example in my opinion. Although, perhaps that's exactly how it is.

What SIGNALS can a black hole emit?

Haha, and that says it all :) Emission of an absolutely black body, a classic :)

Hawking radiation, I guess.

Hawking radiation? Well, there is such a thing. But as I understand it, this is not radiation in the literal sense, but a way to describe the effects of General Relativity associated with black holes.