Power on the system, then hold Run and press Select ten times. Enter one of the following codes at the title screen to begin game play at the corresponding level.
2: Up + Select + Run
3: Right + Select + Run
4: Down + Select + Run
5: Left + Select + Run
6: Up + Right + Select + Run
Sound test
Power on the system, then hold Run and press Select ten times. Then, hold Select and press Run at the title screen
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