Side Arms/Hidden content
From NEC Retro
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Grayscale mode
On the title screen, press HOLD ↑+Ⅰ+Ⅱ RUN . This will display all graphics in grayscale.
Reduce frame rate
On the title screen, press HOLD ↓+Ⅰ+Ⅱ RUN . This will reduce the frame rate to 10fps.
References
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Main page | Comparisons | Hidden content | Bugs | Magazine articles | Reception | Promotional material
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