Some projects attempted a clean-room reimplementation of the PS2 BIOS (like OpenPS2Loader partially bypasses it), but a full replacement does not exist. Commercial emulators like "AetherSX2" (Android) also require a real BIOS dump.
Thus, for the foreseeable future, if you own an SCPH-70004, you must dump it yourself. scph 70004 bios
If you dump the BIOS from an SCPH-70004, you will typically see a version string like:
v2.20 (23/02/2007) or later.
Unlike earlier "fat" PS2 models that had version 1.xx, the slimline models introduced updated BIOS revisions with improved DVD playback and security tweaks. Some projects attempted a clean-room reimplementation of the
Developers using PS2SDK or running raw ELF files via FreeMCBoot (FMCB) may need to test how applications interact with the native BIOS calls. If you dump the BIOS from an SCPH-70004,