Thank you just tried and now the problem that I had regarding the black screen is disappeared. I've test game boy and PlayStation emulator: the first works good but I can't save. The second works but is painful slow (on raspberry 2) and also it doesn't auto remap keys like the game boy emulator so with a ps3 controller I can only "control" kodi and not the game itself, while in the GB everything is fine controller too . Thanks for you update another strange thing is that i can't install the game repo provided it's not listed .
Even if you cannot save you should be able to use "save states" however this may require a keyboard to be plugged in to access the menu by hitting "enter" then going the the "save states" manager icon.
The psx controller issues I am aware of and will try and fix it.
On RPi you should make sure to use pcsx-rearmed as the emulator instead of beetle-psx if you aren't already.