: BIOS files must remain in their original .zip format and are typically placed in the /roms folder of the MAME directory.

: MAME is notoriously strict about versioning. A "0.147 ROM set" is specifically required for this version because files are frequently updated or renamed in later releases to improve accuracy.

To maintain a functional MAME 0.147 setup, the 0.147 BIOS ROMs set is non-negotiable. Placing the required zip files into the ROM directory allows the emulator to properly emulate the foundational hardware of classic arcade machines.

Used by various Konami digital and rhythm hardware systems.

Your actual game ROMs (e.g., mslug.zip for Metal Slug) should live in this exact same roms folder right alongside the BIOS files. Verifying the Configuration via Command Line

As emulation accuracy improves, the MAME team updates ROM dumps to reflect better, cleaner reads of the original chips. A BIOS file that worked perfectly in MAME 0.139 might cause a "Missing Files" error in MAME 0.147 because a chip was re-dumped or renamed. Best Platforms for 0.147

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