0.139u1 is old enough that many archives use for distribution but internal ROMs are still standard ZIP (MAME requirement).
If you delete the parent game, the clone game will stop working completely. Navigating a MAME 0.139u1 Archive
Downloading a complete archive is generally considered a legal gray area unless you own the physical arcade PCBs of the games. However, the MAME project encourages the preservation of these games for historical and educational purposes. Always verify the rules of your region regarding digital backups. Mame 0.139u1 Roms Archive
: Only download from reputable archival sites. Avoid sites that require "download managers" or executables to get the files. Legal Status
The version number "0.139u1" represents the first "update" patch released after the core MAME 0.139 baseline in 2010. While the official PC version of MAME has advanced hundreds of versions since then, adding more accurate emulation and demanding much faster computer processors, 0.139u1 remains frozen in time as a perfect sweet spot for performance. Why the 0.139u1 Romset Matters Today However, the MAME project encourages the preservation of
By preserving and correctly configuring a MAME 0.139u1 ROMs archive, you ensure that decades of arcade history remain flawlessly playable on everything from the smartphone in your pocket to a custom-built home arcade cabinet.
A merged set combines the parent game and all of its clones (regional variants, bootlegs, revisions) into one single zip file. Saves a massive amount of storage space. Cons: You cannot easily separate individual game variants. 3. Split Reference Sets Avoid sites that require "download managers" or executables
While a modern version of MAME requires a fast, modern desktop PC to run games smoothly, MAME 0.139u1 was optimized during an era of slower hardware. This makes it incredibly lightweight.
If you are using the popular MAME4droid (0.139u1) app, you have the 0.139u1 ROM set. Newer sets will not work, and older sets will be missing files. 3. Frontend Compatibility (Hyperspin/LaunchBox)