Unable to run .gdi files on nullDC in DreamCast & Saturn Emulators [/pc/dc+saturn] Posted June 14, 2008 So basically, I'm unable to run any .gdi files on nullDC. I've already tried it with several different games and it doesn't get me further than the BIOS screen. Are there some settings I need to change, or some additional files I need? Oh, and I already tried a lot of things, like updating my drivers and getting other nullDC plugins that weren't in there. Thanks for your time. Check to see if you have the "Patch GDROM Region" checked. For some reason, I cant load GDI files if I dont have that checked. Its under Options>GDROM, using the "Image Reader plugin by drk||Raziel & GiGaHeRz [Nov 7 2007] v1.0.0 (nullGDR_Win32.dll)" Hope it works!