New Hakchi 2.21b with retroarch with core 0.9b release. It seem to fix the black screen issue for snes game launching from retroarch. You can try using this new version. See whether it fix your issue.
The problem is not that one, actually i can run the nes games on snes mini. The black screen and back to the menu occurs when i run a nes game without installing the retroarch ( i guess is normal obviusly) . My problem is that i cannot use the savestate function for the NES games because the "reset" button is working only with snes games.
Now i'm running the 2.20 "portable" version, i was wondering what i have to do using a newer portable version (for example uninstall the kernel from previous version executable? ).
Does the new versions of hackichi2 fix this problem?
Edit: with the 2.21d and retroarch 1.0 now the savestate are running fine also for the Nes games and i saw that Cluster added also the autofire on the nes games on the X and Y Buttons *_* i couldn't ask more, really really thanks and good job.
Last thing: i have to figure out how to import and run a MAME game and hope that Cluster will make possible running Dragonball Hyper Dimension, a part of that, AWESOME JOB! Thanks again
Edit2: I make all work, awesome, this is the final console xD!