Don't know how it is with the modern console games but at least in the old days the developers where relying on all kinds of tricks that made really accurate em

Don't know how it is with the modern console games but at least in the old days the developers where relying on all kinds of tricks that made really accurate emulators difficult to make. See for example the story about "perfect snes emulator" [1] [1] http://arstechnica.com/gaming/2011/08/accuracy-takes-power-one-mans-3ghz-quest-to-build-a-perfect-snes-emulator/ http://arstechnica.com/gaming/2011/08/accuracy-takes-power-o...