This file can also be obtained from many PS3 retail discs. Run RPCS3, and go to File > Install Firmware and locate the PS3UPDAT.PUP file.Download the three files above, then extract the PS BIOS Claim Tool and RPCS3 into their own folders.The extraction process is covered in the video above, but here is a quick summary: The file will be named PS3UPDAT.PUP and you can get it from right-clicking on the blue button that says “Download PS3 Update” and selecting “Save File As…” We’re going to extract our BIOS files from this update file using the two tools we downloaded above. The installation process will take a couple minutes - it will also compile the PPU Modules at the same time. Take the two PS BIOS Claim Tool files ( firmware_bios_claim.bat and firmware_bios_claim.ps1) and place them inside the RPCS3 main folder.Once this process is complete, you can close RPCS3. Double-click on the firmware_bios_claim.bat file and run this batch file.
You may get a warning from Windows security, just select Get Info > Run Anyway. Inside the RPCS3 folder you should find your new PS2 and PS1 BIOS files! They are named as such.This will take a moment to run through the batch file, and you will get a notification within the terminal window that the process is complete.