Hi ! I'm looknig for help regarding this core
I still have this very same issue : I get a black screen after loading any game. Well, it does depend on the SD card and on the files on it. I tried with a blank SD with few files and got a black screen. I tried with a bigger one with many files on it ; it first worked and stopped working after making a few modifications to it.
It's such a good core it's a pity there is this big issue with it
I talked to the guy who made the port via his blog but it seems I'm the only one to experience the problem, and he doesn't seem to have much time anymore for this.
There's a real mystery regarding those SD cards. I never found a SD which worked with everything. Some cards (with the very same content, I insist on this) trigger big incompatibilities with the Amiga core, some with the NES core, some with the PCE core.... This latter being especially difficult to get running while it's excellent