I just managed to get PCSX ReARMed running on my RPI3B with LE 9.0.2 with BIN/CUE images that I have made from my old PS1 ROMs (legally bought). I am able to play these games on PCSX Reloaded on my Ubuntu laptop, so the images are fine.
On the RPi3B it works, but the Pi is obviously not oomphy enough. The games run extremly slowly and jittery with gaps in the audio, and the video is too laggy and halting to be useable. A quick look at "top" in the console reveals a total load of around 1.50 to 1.80. From that my guess is that PCSX ReARMed is not multi-threading and uses only one core.
While I had my concerns about the Pi having enough grunt to emulate a PSx to the point where games are playable, I do wonder if there is anything I can do to enhance performance. I do not have a BIOS installed (yet, not having worked out how to do that) but I'm not sure that would solve the problem.
So. My questions are:
1. Is the RPi3B supposed to be able to run PCSX ReARMED to the point where it can play games like Tombraider (1, 2 and 3)?
2. If so, what can I do to increase performance to the point where PSx emulation this becomes a usable feature? Will installing a BIOS help in this respect?