John Carmack writes: > Unlike most emulator projects, Kemulator turned out to be closed source abandonware It is amazing that in the past two decades most emulators transitioned from closed source closely guarded secrets to open sourced and often under a popular license. The preservation is unparalleled.
It surprises me the number of people who thought they could make money selling emulators, in what is and has always been almost exclusively dedicated to piracy.
They even paid the developer several thousand dollars so that they would improve the debugger function.
This was all unofficial, of course - Nintendo had no idea and would not have been happy if they found out.