problem with MVS Magic Key converter on the 161 in 1 MVS cart

Discussion in 'Neo Geo Discussion' started by HugeCat, Dec 24, 2013.

  1. HugeCat

    HugeCat Active Member

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    i have only metal slug for the mvs and it seems to work fine but my 161 mvs cart has huge sound problems depending on game, i made a video but i dont know if you can hear it but often times the sound make short looping noises or something. Games like viewpoint, sonic wings 3 and pulstar are the worst while fighting games show this problem the least. Sometimes the music just stops like in pulstar or there is no sound at all until i restart the game and push the card a bit to the left. I tried to clean my cart and the converter with alcohol, as i have no rubber alcohol yet i used spirit with 96% but it seems not helped that much.

    My video shows the 3 neo geo powersupplies i am using, the Atari jaguar powersupply with the adapter seems to be the most stable as i also had really really bad problems with metal slug x with the other two powersupplies. Do i need a different powersupply or something?
     
    Last edited: Jan 23, 2017
  2. silverfox0786

    silverfox0786 Gutsy Member

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    I have heard that some games using a converter need a different power supply
    neo geo store sells them but I am assuming its just about the rating. unfortunately they have not disclosed what the rating are so getting a compatible cheaper option is not going to be an easy task
     
  3. Bad_Ad84

    Bad_Ad84 The Tick

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    Its just going to be higher amps, so you can go as high as you can find. Not hard, voltage will need to be the same after all.
     
  4. Kaicer

    Kaicer Site Supporter 2014

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    For what I know and heard the 161 always give problem with converters on the AES. I dont have converter I just saw what it does on friend consoles is always buggy.
     
  5. silverfox0786

    silverfox0786 Gutsy Member

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    some games are buggy but again depends on PSU
    I have found so far the games I have played n 161 in 1 using my Super MVS converter II has been pretty good.
    Metal Slug is supposed to be the one that gives issues and for me its been great
     
  6. Calpis

    Calpis Champion of the Forum

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    Audio data passes right through the converter so it isn't the culprit*.

    *It does technically negatively affect the signal integrity, but in this case the signals are low frequency and not terribly put out


    Likely candidates are: bad PCM logic in the multi-cart, bad ZMC logic in the multi-cart, bad dumps in the multi-cart, incomplete or missing V ROM data, and bad game initialization.
     
  7. HugeCat

    HugeCat Active Member

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    but it works fine on my MVS
     
  8. Calpis

    Calpis Champion of the Forum

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    The MVS and AES are slightly different when it comes to sound; the MVS has an internal sound BIOS which is selected on power-up before control is handed off to the selected game's sound program. The AES doesn't have the BIOS, it just expects the game's sound program from the get go. Probably the cart fails to initialize properly as an AES game (hardware and/or software issue), leading the Z80 to crash (and need resetting).
     
  9. HugeCat

    HugeCat Active Member

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    but the problem with the sound not working at the start is happening also with my original mvs copy of metal slug
     
  10. difuno

    difuno Member

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    Z80 error seems to be the major one that causes sound problems on MVS, I own both AES and MVS systems and Z80 error happens on my MVS but never the AES.
    PS: While Z80 errors's reported I can't get any sound, neither from multi carts nor from original MVS carts.
     
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