Ok so i've been trying what idarius said.
I just let the aspect on 3 cause my screen is 16:9
For the dreamcast emulator and playstation (let's say next gen :p) it works perfectly great !
Better image scaling and centered !
For the rest it's ok, it's just that i think it's a too big screen to play retro games.
The only games who do not fit well on the screen are really old shoot'em up like 19XX
As i want to include my screen in a portable console (that will work like the switch console) i'll try a 5inch screen and give you an update if it's better if you are interested.
Thank you for all your informations !
