The final digit of a PS2 model number (SCPH-xxxxx) indicates the BIOS region and intended market. Example Model Japan (NTSC-J) SCPH-10000 North America (NTSC-U/C) SCPH-39001 Australia/New Zealand (PAL) SCPH-90002 United Kingdom (PAL) SCPH-30003 Europe (PAL) SCPH-70004 South Korea (NTSC-J variant) SCPH-50005 Hong Kong/Taiwan (NTSC-J variant) SCPH-90006 3. The SCPH-90006 "Patched" BIOS SCPH-90006
For PlayStation 2 emulation, a "complete" BIOS collection typically includes the final revisions across all major regions. The SCPH-90006 "patched" version specifically refers to the final BIOS revision (v2.30) released for the late-model Slim PS2s, which Sony "patched" to block the FreeMcBoot (FMCB) exploit. Core BIOS Files by Region all ps2 bios files including the new scph90006 patched