Version 0.139u1 was released before MAME merged with MESS (the emulator for old computers and consoles). The interface is straightforward, with no extra frills.
| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | "awbios.zip not found" | Missing Atomiswave BIOS | Download the correct awbios.zip for MAME 0.139u1. | | "mslug6.zip: u2.ic2 (WRONG CHECKSUM)" | Mismatched ROMset | Your ROM is for newer MAME. Find a set dated ~2011. | | "Game not working" | Corrupted download | Re-download the archive. Test with 7-Zip for errors. | | Black screen after Atomiswave logo | Missing graphics ROMs | Ensure your mslug6.zip contains the m6-cart.bin or similar graphic files. | metal slug 6 mame 0.139u1 rom
Consequently, the mslug6 ROM set for MAME 0.200+ is completely different—different filenames, different data offsets. If you try to run a “0.139u1 ROM” on MAME 0.270, you’ll get a "ROM not found" or "bad dump" error. And vice versa: a modern ROM will crash 0.139u1. Version 0