I have no idea how I am supposed to launch a PS1 or PS2 game with RetroArch since there is seemingly nothing in LaunchBox that asks me where the PS1 & PS2 BIOS are? If I delete RetroArch and delete a library, when i important Roms again i get no prompt to install RetroArch and select BIOS etc like the YT video shows. There doesn't seem any way to have RetroArch install and then ask you about all the BIOS etc for your existing libraries. Literally selecting play means nothing happens.
If i manually edit a game (such as a PS1 game) the emulator field is blank (despite manage > emulation > retroarch showing as associated with PS1) but if select RetroArch for that field and try and play the game then nothing happens. I went to manage > emulators and deleted RetroArch from there, and then reinstalled it from manage > retroarch > install, and it seemed to install fine, but now all my games that were using retroarch without any issue don't load and say that the emulator cannot be found. TLDR: make sure you have a PS2 Bios file in the /emulation/bios folder, not just in a nested pcsx2 directory. However, with the BIOS, you can emulate your PS2 game using PCSX2.
I select RetroArch from the dropdown list and it then just skips anything to do about RetroArch or the core and just has the same prompts as previous versions about copy rom files etc. Most cores do not require any BIOS except for the Sony PlayStation, NEC PC Engine CD, PC-FX, and Sega Saturn cores 9 I found the Apple II roms in Mame. Re-running EmuDeck setup confirmed i didnt have a missing BIOS warning anymore, and my PS2 roms started launching correctly from both EmulationStation and from the Steam UI in handheld mode. Find an emulator to emulate PS2 gameFind a bios, BUT it is illegal to download one, unless you extract it from your own ps2. In demo video - after importing a Rom the user is then asked about configuring RetroArch and selecting BIOS etc, however I am on 12.3 and I do not get this option at all. I was looking forward to the new RetroArch integration but things have gone awry in my case.