Download the latest version of biosdrain under the GitHub releases page.

Execute biosdrain on the EE. For example: ps2client execee host:biosdrain.elf

biosdrain should automatically detect a host filesystem, and dump the files directly to your computer.

Put the biosdrain.elf file onto a FAT32 (or exFAT!) formatted USB drive.

In uLaunchELF, navigate to mass: and execute the biosdrain.elf file you just transferred.

biosdrain should automatically detect a USB drive, and dump the files to the root of the USB drive.

In the case that biosdrain does not detect a USB drive, try creating a smaller 1GB partition and leaving the rest unformatted.

Simply copy the files (if you've used a USB drive) back to your computer, and keep them somewhere safe so you don't have to do this process again.

If the path to your bios was D:\ps2bios\dump you'd see one of the below.

WX

QT

• ROM0
• ROM1 *size fixed at 4096kb
• ROM2
• NVM
• MEC

This software has been based off of the work from PS2Ident licensed under AFL license-3.0 . The Sysman and Romdrv module source have been taken from there as well.

Check out https://fobes.dev for some interesting PS2 programming blogs. You can support me on KoFi here.