Match your ROM précisément to the 0139u1 reference DAT file. AW_BIOS.BIN MISSING Missing system files.
: You can hold two power-ups at once and switch between them. metal slug 6 mame 0139u1 rom top
: Because Metal Slug 6 runs on Atomiswave hardware rather than standard Neo Geo hardware, older MAME cores require a very specific, clean romset structure to decode the game's graphics and sound properly. The "Top" ROM Structure for Metal Slug 6 Match your ROM précisément to the 0139u1 reference
If you are running the mslug6 bootleg ROM variant inside an ecosystem built on the 0.139u1 core, implement these configuration tweaks to get the smoothest arcade experience: metal slug 6 mame 0139u1 rom top