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Thread: The Sega Neptune!!!!

  1. #41
    Insert Coin (Level 0) Longhorn Engineer's Avatar
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    Are your wires as short as possible and of equal length? Are they twisted up or separated. Try sticking a sheet of card board between the two rows to help keep them apart.

    This is the same issue I had when I used ribbon cable.

    If all else fails take a sheet of foil and fold it into 3 layers. Cut it to fit in between the two rows. Solder a wire onto it and connect it to ground. Cover the foil with packaging tape and use it to separate the two rows. In effect you are creating a cheap RF shield. Don't know if it will work but you can try.

    Oh and I want to see some pictures!!

    edit// measure the 5V lines on the cart slot on the 32x side and make sure it isn't fluctuating.
    Last edited by Longhorn Engineer; 01-17-2008 at 09:38 PM.

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    The 32X generates a clock for the SH2 via a PLL chip that multiples 3x the Genesis CPU clock, via the cartridge slot.

    That clock could be being distorted via a long cable as LE said.

  3. #43
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    A test to try...

    Run a Genesis game. This won't require a clear clock to the 32X, because the 32X will never need to be "init".

  4. #44
    Strawberry (Level 2) Nitrosport's Avatar
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    I'll get some pics up tomorrow because it's apart at the moment. I want to use different wire for the connections between the 32x and genesis board. When it's back togeather, pics will be up.

    Oh, I tried a genesis game but I got the same results as with the 32x.

  5. #45
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    Ok guys, It's been a while since I replied. I finally got a chance to replace the wires. I used ethernet wire and now everything is working perfect! I'm going to radioshack today to find a good power adapter to use (10V 2-2.5 amp) so I can power both units togeather. I also need to get some more wire so I can re-route the audio/video wires. Pics for now:





    I ended up using a new 32x and genesis. I wanted to make sure there was no room for error this time lol. I still think my original problem with the first attempt was the wires. Oh well, I'll clean up the other 32x and put it back togeather. It should work fine.
    Last edited by Nitrosport; 02-19-2008 at 10:38 AM.

  6. #46
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    I went to radioshack but they had no 10V adapters. I tried a bunch of places online and there are very very very few 10V adapters available. When I do find them, they are way less than 2 amps. Can someone please point me in the correct direction for the power adapter? Why are 10V adapters to damn rare. Here is a small test video for you guys. Sorry about the quality but I'm using my digital camera:

    Neptune
    Last edited by Nitrosport; 02-19-2008 at 04:33 PM.

  7. #47
    Great Puma (Level 12) jb143's Avatar
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    Quote Originally Posted by Nitrosport View Post
    Why are 10V adapters to damn rare.
    Because there's not really a battery equavalent. 10 is not divisible by 1.5

    Why do you need 10V? Most adapters usually provide slightly higher voltage than whats needed and then it's regulated in the circuit.

  8. #48
    Strawberry (Level 2) Nitrosport's Avatar
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    The genesis and the 32x boards both run on 10V. I found a few 10V adapters online but they were like 1 amp max.

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    You could get away with 9v or 9.5v..

    The voltage regulator inside will take care of you.. Besides, internally, they run at 5v.

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    Ok, I found a 9V 2 amp adapter. I'll probably buy it but I'm gonna check the swap shop tomorrow because they have hundreds of adapters at a buck a piece

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    just make sure you match polarity, ok?

  12. #52
    Great Puma (Level 12) jb143's Avatar
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    Quote Originally Posted by evildragon View Post
    You could get away with 9v or 9.5v..

    The voltage regulator inside will take care of you.. Besides, internally, they run at 5v.
    That's basically what I was trying to say. Thanks for making it more clear.

    Quote Originally Posted by evildragon View Post
    just make sure you match polarity, ok?
    Yeah. Get your polarity wrong and that burning smell will be the smoke getting out of your regulator...and possibly other parts. Smoke is, after all, what all electronics parts are made out of. Letting the smoke out is a very bad thing since it's near impossible to get it all back in.

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    When are you going to get ready your Neptune version Evildragon?.(Genny model 1/32X)..I can't hadly wait to see it...By the way last weekend got another one ready.
    http://usera.imagecave.com/capcom2000/HPIM4792.JPG
    http://usera.imagecave.com/capcom2000/HPIM4796.JPG

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    Quote Originally Posted by ooXxXoo View Post
    When are you going to get ready your Neptune version Evildragon?.(Genny model 1/32X)..I can't hadly wait to see it...By the way last weekend got another one ready.
    http://usera.imagecave.com/capcom2000/HPIM4792.JPG
    http://usera.imagecave.com/capcom2000/HPIM4796.JPG
    I'm caught up with Real Life Syndrome..

    AKA, insurance, bills, and lack of a job. My cars license expires in a couple of days so im frantically trying to find a job, before im royally screwed.

    This much is done though.






    (And no, the pic with the Doom cart in it, is NOT a complete photo.. It was a test to make sure the cartridge widening was good enough.

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    All things must pass!..I hope everything gets better for you at the end of the day!..A nice 32X logo could apply to the empty side of that Genesis case

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    My father just paid for my cars license.. So that puts my mind at ease for that part.. Still would like to have a job though, I got no income.

  17. #57
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    so I have an extra model 1 genny and a 32-X laying around ... anyone wanna make one of these puppies for me? haha I don't have the tech knowledge or tools to even attempt something such as this.

  18. #58
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    Someone needs to do this for a Laseractive unit.

  19. #59
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    Could this work with a CDX?

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    Quote Originally Posted by MASTERWEEDO View Post
    Could this work with a CDX?
    How..........would it even fit?! o_O

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