The MAME 0.134u4 Romset is a specific snapshot of arcade data used by emulators that are based on that particular version of MAME. It is most notable today for its use in homebrew and mobile emulation projects where modern MAME versions are too resource-intensive. Key Applications

. Prior to this, certain inputs were broken, making the game unplayable in its intended arcade form. The Quest for Precision

, which was designed for dual-core mobile devices (1GHz+). It was chosen because it represents a "high specs 2009 PC build" that could handle more complex games than the much older 0.37b5 set while still running efficiently on early smartphones and tablets Google Code Save State Support

Why does this matter? MAME is not backwards compatible in the traditional sense. If you run a ROM dumped for MAME 0.200 on MAME 0.134u4, it will likely crash or fail the CRC (Cyclic Redundancy Check). Conversely, ROMs from 0.134u4 are often "frozen" in a state that later MAME versions consider outdated.

• MAME: The emulator.
• 0.134u4: This is the version number of the emulator.

  : This version also documented regressions. For instance, the game

  If you find that your 0.134u4 set has errors, you can use auditing tools like ClrMAMEPro or RomCenter. These tools compare your files against an official .dat file (a database of file signatures) for version 0.134u4 to identify and fix missing or renamed files.  MAME4droid (0.139u1) – Apps on Google Play