Even after an UPD, you will likely have "Missing" sets. New games may have been added. You will need to find individual ROM files (e.g., sf2.zip for Street Fighter II) that match the 0.139 CRC32 checksums.
29 Jul 2010. MAME 0.139 is now available, go get it at the Latest Release page. mame 0139 romset download upd
For users on Android devices, older PCs, or handheld consoles like the Anbernic or Retroid series, 0.139 provides the perfect balance between a massive library of games and low hardware requirements. Where to Find MAME 0.139 ROM Sets Even after an UPD, you will likely have "Missing" sets
When downloading, you will see different types of sets: 29 Jul 2010
: Newer versions of MAME prioritize high-accuracy emulation, which requires significantly more CPU power. The 0.139 version is much "lighter," making it ideal for older smartphones, Raspberry Pi, and other handheld gaming devices.
Usually happens when using a "Merged" set where a game depends on a "Parent" ROM that is missing.
: Version 0.139 strikes a "sweet spot" balance between accuracy and speed, making it ideal for mid-range smartphones and tablets that cannot handle the resource-heavy overhead of modern MAME builds.