PCSX2: BIOS not found (SCPH files missing) — the legal way to add your PS2 BIOS
PCSX2 cannot run a single PS2 game until you supply a BIOS file (a file named something like SCPH-70012.bin or similar) dumped from a PlayStation 2 you own. This is not optional — without a BIOS there is no PlayStation 2 operating layer for games to run on.
You installed PCSX2, pointed it at a game or ISO, and hit one of these walls:
- "No BIOS found. Please place a BIOS in the following path..."
- PCSX2's setup wizard shows a BIOS list that is completely empty
- Games appear greyed-out, or PCSX2 won't let you past the BIOS setup screen
- You clicked a game and PCSX2 either closed itself or showed a crash immediately
What the BIOS is: The PlayStation 2 contains a small ROM chip with Sony's proprietary startup code — the BIOS. It initialises the hardware, displays the PS2 boot screen, and provides system calls that games depend on. PCSX2 emulates the PS2's hardware but cannot legally ship Sony's firmware code, so you must supply it from a PS2 you already own.
The legal line: A PS2 BIOS is copyrighted by Sony. The only legal way to obtain one is to dump it yourself from a PlayStation 2 console you physically own. EmuDesk does not host, link to, or endorse any site that distributes pre-dumped BIOS files — downloading a BIOS from a third-party site almost certainly violates copyright law regardless of what those sites claim. The dump process requires owning the hardware; there is no shortcut around this.
Once you have a valid BIOS from your own PS2, PCSX2 setup takes about one minute. Re-test after each step below.
Solutions
solution #1458
Use PCSX2's official quickstart guide to dump the BIOS from the PlayStation 2 you own, then tell PCSX2 where you put the file. This resolves "No BIOS found" for every user who has a real PS2.
- Read PCSX2's official dump instructions. Go to pcsx2.net and open the Setup Guide or Getting Started section. PCSX2's documentation walks through the BIOS dump process using a method that works on the specific model of PS2 you have (the exact steps differ by console revision). Follow those instructions — the tool and procedure come from the PCSX2 project and are designed to be used with your own hardware.
- What you will get. The dump produces one or more files with names like
SCPH-70012.bin,SCPH-90006.bin, or similar (the number reflects your PS2's model). You may also get companion.mecand.nvmfiles — keep them together. - Place the file where PCSX2 looks. During PCSX2's first-run setup wizard, it asks you to point to a BIOS folder. Use the folder path it suggests (usually inside its user-data directory) or create your own and tell PCSX2 about it via Settings → BIOS. Copy the
.binfile (and companions) into that folder. - Select the BIOS in PCSX2. In Settings → BIOS, refresh the list. Your dumped BIOS should appear with its model name. Select it and click OK. Launch a game — the PS2 startup screen (or the game directly, in fast-boot mode) should now appear.
If PCSX2 can't find the file after you placed it, check S2 below for the most common path/naming mistakes.
solution #1459
You copied the BIOS file but PCSX2 still shows the list as empty or says no BIOS was found — almost always a wrong folder, wrong filename, or a mismatch between portable and installed PCSX2 modes.
- Check whether you are running PCSX2 in portable mode. If
pcsx2.inilives in the same folder aspcsx2.exe, PCSX2 is in portable mode and looks for BIOS in abiossubfolder next to the executable. Ifpcsx2.iniis in%AppData%\PCSX2\, it is in user mode and looks in%AppData%\PCSX2\bios\. Put the file in the right place for your mode. - File must end in
.bin— not.bin.zipor.7z. Enable file-extension display in Windows Explorer to confirm; extract the archive if it arrived compressed. Only the raw.bin(and optional companion files) goes in the BIOS folder, not a zip. - After placing the file, hit Refresh in PCSX2's BIOS list. PCSX2 does not watch the folder live. Open Settings → BIOS, click Refresh List (or close and reopen the settings dialog), and the BIOS should appear.
- Run PCSX2 as administrator once. On some setups PCSX2 can't read its own data folder without elevated permissions on the first run. Right-click
pcsx2.exe→ Run as administrator, refresh the BIOS list, confirm it appears, then select it and save. You don't need to keep running as admin after this.
solution #1460
PCSX2 shows multiple BIOS files after the dump (or you have a choice of region) and you're not sure which to pick — the quick rule is to match BIOS region to the game's region, but any BIOS will boot most games.
- Match region when you can. BIOS files are region-specific: NTSC-U (Americas, SCPH-700xx), NTSC-J (Japan, SCPH-500xx/700xx/900xx), PAL (Europe, SCPH-700xx-E). If your game disc or ISO is NTSC-U, pick an NTSC-U BIOS; for a PAL game, pick PAL. Most games will boot with any region BIOS, but region-locked titles and certain PAL games with timing differences behave better with the correct regional variant.
- Use the model you dumped from your own console. If you only have one PS2 and one BIOS, just use that one — don't search for a "better" BIOS. The one from your hardware is the correct one for you to use legally.
- Newer model numbers are not always "better." SCPH-90006 (slim, last model) and SCPH-70012 (slim, common) both work well in PCSX2. The BIOS version matters less than using a valid, complete dump from your own console. Pick whichever you have; if something is wrong with a specific game, the issue is almost never the BIOS model.
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