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Thread: NAM-1975 possible alternate version found?

  1. #1
    Join Date
    Oct 2019
    Evanston, IL USA


    NAM-1975 possible alternate version found?

    I picked up a bunch of MVS carts recently and Iíve finally got a test set up for them. First game I tested is NAM-1975. I have two carts of this title. One appears to match MAME exactly. The other has a weird sound problem. But also interesting on the one with bad sound, it appears to have some sound that I donít find anywhere else. I watched several youtube videos of this game and none of them have this extra sound. I see only one NAM-1975 version in MAME. However when I look here: I see two NAM-1975 sets referenced.

    I recorded both games. The videos are only 30 seconds or so. Version 1 is the one that appears to match MAME. On version 2, the sound goes out, but the background music still continues. Then right near the end of the video, the sound comes back and some vocals are present that I donít find elsewhere. Also, FYI, on the one with the bad sound, if I go into self-test, the left, right and center all work fine. You can view/listen to the videos here:

    When I look at the scans of the PCB in the top web site above, it appears all ICs are soldered. Does anyone have any knowledge of a second ROM version of this game? Anyone have any ideas or suggestions on the sound problems? Iíve never opened an MVS cart before. Is it pretty straight forward to dump? I imagine at a minimum, I have to desolder ROMs. Any guidance/advice appreciated. Thanks,

    Joe (joemagiera at ameritech dot net)

  2. #2
    massimiliano's Avatar
    Join Date
    Feb 2004
    On the green!!

    pretty sure it's Dr Muckley SE from the last boss fight.

  3. #3
    Hollywood Hulk Gohan GohanX's Avatar
    Join Date
    Sep 2001
    Hollywood, CA

    Spoiler alert

  4. #4
    Crossed Swords Squire
    Burning Fight!!'s Avatar
    Join Date
    Jan 2014
    North Korea (Brazil)

    It's the boss game over sfx aka what 95% of players will hear after getting to the last boss fight with Dr. Muckley. Fucking bullshit quarter stealer boss.

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