: Unlike a split set (where clones need the parent file to run) or a merged set (where everything is crammed into one giant ZIP), a non-merged ZIP contains all the BIOS files, drivers, and parent data it needs inside that one file. Why Use a Non-Merged Set?
The primary downside to this format is . Because code is duplicated across multiple ZIP files (e.g., the same BIOS code might exist in 50 different fighting games), the total size of a "Full Non-Merged Set" is significantly larger than a merged one. Merged Set : ~70-80 GB Non-Merged Set : ~150+ GB (varies by version) 🛠️ Managing Your Set non merged mame rom set
In a non-merged set, a clone ROM contains all the files needed to run the game, including those shared with its parent. This means if you have the US version of Street Fighter II , it will contain every single byte of data required for that specific version to work, even if most of that data is identical to the World version. Non-Merged vs. Merged vs. Split Sets : Unlike a split set (where clones need
: Because parent files and BIOS are duplicated across every related clone, a non-merged set is significantly larger than "split" or "merged" sets. Comparison with Other Formats Content of One ZIP File Dependencies Non-Merged Parent + Clone + BIOS/Devices None —fully self-contained. Split Only files unique to that specific version (clone). Because code is duplicated across multiple ZIP files (e
: It reduces "ROM not found" errors, which are common when users download individual games from the internet that were originally part of a split set. 📉 The Trade-offs