Thunder Blade/Hidden content
From NEC Retro
- Back to: Thunder Blade.
On the title screen, press . to bring up the menu, then press
Hold SMPTE color bars, but with a set of greyscale shades at the bottom. Pressing will cycle through two additional test screens including a grid test and a greyscale bar screen. Press on any of these test screens to exit and display the title screen. + when powering on the system to display a colour test screen based on the