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For the purist running a dedicated arcade cabinet with an old PC, is superior. For desktop emulation in 2024, newer builds are better—but the keyword search volume proves many still use the older version.

Hey all, I’m trying to get Metal Slug 6 (mslug6) working on MAME 0.139u1. I know it’s an older version, but I’ve got a full ROMset for this release.

Because MAME 0.139u1 uses a specific encryption key for Atomiswave cartridges, your mslug6.zip folder must contain the following files (CRC32 checksums for verification):

Unlike the Neo Geo, which requires a universal BIOS, the Atomiswave requires specific BIOS files to boot the system layer. Without these, the screen will remain black, or MAME will report a "missing files" error.