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What are you running? (MAME4droid, RetroArch, RetroPie?) Which specific game is giving you an error?
if your current BIOS files are compatible with this specific version? MAME4droid (0.139u1) – Apps on Google Play
This can usually be found on the official MAME website or forums, where developers and community members share necessary files. mame 0139u1 bios pack
The core concept of MAME emulation is . Emulators, ROMs, and BIOS files are developed alongside each other. A ROM or BIOS file from version 0.139 is designed to work precisely with that version of MAME. This is why using a BIOS pack labeled for a specific MAME version— 0139u1 —is critical. Using the wrong BIOS (e.g., from a much older or newer MAME version) is a leading cause of games failing to launch.
A BIOS (Basic Input/Output System) in MAME is a set of low-level system files (ROM dumps) required to boot certain arcade hardware before the actual game ROM loads. Unlike standard arcade games, many systems (e.g., Neo Geo, CPS-1/CPS-2, Nintendo VS. System, PlayChoice-10, Sega System 16/18/32, Konami, and various home consoles/computers emulated in MAME) require a shared BIOS file.
MAME is strict about file integrity. As the MAME team finds more accurate dumps of original arcade chips, they rename files or change the expected data hashes within the ROM sets. If you use a BIOS pack meant for MAME version 0.250 inside a MAME 0.139u1 emulator, the emulator will reject the files, assuming they are corrupt or missing. Here is the text for a reference
Move all the BIOS .zip files directly into your main ROM folder, right alongside your game files.
. Using BIOS files from newer or older MAME sets (like 0.37b5 or 0.261) may cause "Missing Files" errors because file hashes and contents change between MAME releases. petrockblock Where to Find the Files While the emulator itself is available on the Google Play Store
Required for various Capcom arcade hits. if your current BIOS files are compatible with
Ensure your BIOS files specifically come from a 0.139u1 set. Using BIOS files from a newer version (like 0.250+) may cause "Missing Files" errors because file hashes and contents change over time.
Distributing copyrighted BIOS files is illegal in many jurisdictions. BIOS files are typically dumped from physical arcade hardware, which you must legally own. This article is for educational purposes.
What are you using to run MAME 0.139u1? (Android, Raspberry Pi, PC, etc.)
To use the MAME 0.139u1 BIOS pack, users typically need to: