Famously, Argonaut impressed Nintendo by circumventing this copy protection. The gameboy actually reads the contents of the ROM twice. Once to check that all th

Famously, Argonaut impressed Nintendo by circumventing this copy protection. The gameboy actually reads the contents of the ROM twice. Once to check that all the data is correct and again to display on the screen. Argonaut just used a capacitor which was set up to charge at the right rate to switch between ROMs and the logo on the screen was their company's logo. It ended up leading to them designing the FX-1 chip for the SNES. http://www.eurogamer.net/articles/2013-07-04-born-slippy-the-making-of-star-fox http://www.eurogamer.net/articles/2013-07-04-born-slippy-the...