Some people could be assuming PSX4ALL is working when it is not. I thought that too, since vids and some audio will work with PSX4ALL without the bios, but the PS logo does not come up and the game will not play. I assumed nothing at all would happen without the bios, so thought the games I tried just did not work with PSX4ALL. I then placed the bios where it supposed to go and the emu says the bios is loaded & the games work now. PCSX has a built in bios and will play games without a bios (in the right place) as a result. Every bin format game I have tried so far plays on both PCSX and PSX4ALL. The issue is they all work MUCH better on 4ALL.