This is the most common format for full sets. The "Parent" game contains the main data, and "Clone" games (versions from different regions) rely on the Parent's files.
Disclaimer: This article discusses the technical aspects of ROM sets for educational and preservation purposes. You should only download ROMs for games you legally own the original arcade PCB for. Please respect copyright laws in your region.
If you are building a RetroPie cabinet or using RetroArch’s MAME 2003 core, you need to source the exact 0.78 set. Here is how to manage it: mame 0.78 rom set
Several factors contribute to the enduring popularity of MAME 0.78:
If you are using a Split set, you must ensure these BIOS files are present in your ROMs folder. Without them, many games will fail to launch: This is the most common format for full sets
When you download a MAME 0.78 ROM set, you will often see options for "Split" or "Non-Merged." This is vital for getting games to work.
The MAME 0.78 set is “frozen” in time. Unlike current sets that constantly change (ROMs get renamed, redumped, or split), 0.78 is a fixed target. Many pre-configured arcade cabinets and tutorials use this set because “what works in 0.78 will always work.” When you download a MAME 0
A common problem is downloading a ROM set labeled "0.78" only to find games don't work. This usually happens because the set is a mix of versions.
MAME is strict; if the ROM is named sf2u.03 but the emulator expects sf2.03, the game crashes.
Because ROMsets evolve, a ROM that works in MAME 0.200 might not work in 0.78. To verify you have the correct set: