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Cuzza's Sega SC-3000H Nano-ITX Mod

Discussion in 'Project Logs' started by Cuzza, Jul 5, 2009.

  1. Cuzza

    Cuzza

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    Here's the old Sega in all its glory:

    [​IMG]

    Some info:

    The SC-3000 is a computer based on the hardware of the first videogame system released by Sega in Japan : the SG-1000 series. It can use the same game cartridges marketed for these consoles.

    The SC-3000 Computer was released in 1983 by SEGA in Japan. It became a competitor of many others 8 bit based computers and its popularity was different in each country it was introduced.

    It was mainly sold in Japan, and two important overseas market: Australia & New Zealand. It has found a little distribution in South Africa, Italy and Spain. Probably there were also some sales in other countries but very little is known about this computer and it is difficult to find out precise information.


    This one is stuffed. So I plan to rip out the guts of this thing and put something useful inside, namely a nano-itx board and supporting hardware. Stay tuned....
     
    Kei, MKmods and erocker say thanks.
  2. Cuzza

    Cuzza

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    So, first thing I want to know is can I get the keyboard to work?

    I think so. Can use one of these:
    [​IMG]

    This guy gives you an idea of how it will work.

    Some more web searching led me to the key matrix for the Sega:
    [​IMG]

    Pulled the kb off, it connects with some nice green ribbons:
    [​IMG]

    So I took the keyboard right to bits to see which connection on the ribbons goes where. Then put all the info together, this is the plan:
    [​IMG]
     
    Jizzler says thanks.
  3. h3llb3nd4

    h3llb3nd4 New Member

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    wow that is complicated!!:eek:
    G/L man! can't wait to see the end product!!
     
  4. Cuzza

    Cuzza

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    thanks bud. keep watching, i'm going to need moral support when time comes to buy the parts
     
  5. h3llb3nd4

    h3llb3nd4 New Member

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    np man;)
    I shall see this project to the end...
     
  6. Th0rn0

    Th0rn0 New Member

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    Wow. Very cool idea. Looking forward to seeing this complete and I love the keyboard :)
     
  7. Mark_Hardware

    Mark_Hardware New Member

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    It's beyond me my friend good luck
     
  8. erocker

    erocker Senior Moderator Staff Member

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    Awsome Cuzza! I was a big Sega fanboy back in the day, can't wait to see it in action. :toast:
     
    10 Year Member at TPU
  9. Yukikaze

    Yukikaze

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    Tag!

    I wanna see this happen. Very cool idea.
     
  10. MKmods Case Mod Guru

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    It looks like you could use a bunch of plugs from old LEDs,Power/reset switches to test that out.
    [​IMG]
     
    Last edited: Jul 5, 2009
  11. Cuzza

    Cuzza

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    Here's the news: New Zealand is pretty light on retailers/etailers/suppliers/anyone who I can buy the nano-ITX stuff i'm going to need for this project. And the ones who do often charge extortionate prices so I think that some complicated international ordering is going to have to happen here :)

    Back to proceedings; now I always love reading other people's detailed project logs on TPU so I'm going to try to be in-depth here to pay that one forward as it were. I hope you guys like it.

    Here's the Sega with the keyboard off:

    [​IMG]

    Note build date 1983, same age as me, even has the same initials, SC! I think this was meant to be.

    Here it is in bits. I threw the old circuit board out, it was stuffed, salvaged a couple of the headers (I need the keyboard connection ones) and some resistors that was about all.

    [​IMG]

    Now, what can I fit in here? Made some quick templates to see what will work?

    [​IMG]

    Mini-ITX it seems is possible, but very VERY difficult, because the case narrows so much at the front:

    [​IMG]

    So the board would fit but the heatsink would not, nor would the memory module. The heatsink could be swapped for a heatpipe latop jobbie, that would work but how to make the memory fit? Are 90deg DIMM risers available? I couldn't find one low enough. I know someone who's posted here who likes resoldering motherboards, maybe he would like to solder a bunch of floppy cables to 240 pins beneath the board and mount the DIMM slot somewhere else (as a personal favour).

    No, I think that idea is just crazy. I mean the guy ansking this question seems to have been working on it for 7 years and failed. So I'll go with Nano-ITX instead.
     
  12. MKmods Case Mod Guru

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    you could mount the mobo upside down below the keyboard (sticking out the bottom with a bit taller feet)
     
  13. mlee49

    mlee49

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    What if you mounted the M-Itx upside down?

    damn it, cut off my MkMods. good thing he's here to help, I'm afraid I suck.
     
  14. HammerON

    HammerON The Watchful Moderator Staff Member

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    Cool project!
    Subscribed~
     
    Crunching for Team TPU
  15. MKmods Case Mod Guru

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  16. Cuzza

    Cuzza

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    Good idea, had not thought of that. but it wouldn't help, the keyboard atcually takes up more space inside the case that the pictures show, so the board's appendages would still hit the other side. I will keep the suggestion in mind!
     
  17. Cuzza

    Cuzza

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    On a posting mission here, so I'll post some more.

    Here's the Nano-ITX board I'm thinking of getting, Via's EPIA-NX

    [​IMG]
    [​IMG]

    Great thing about it is everything is very low to the board and all the connectors plug onto board headers, so I can mount them easily into the side of the case no matter where I mount the board.

    Now some people have suggested I get one with an Intel Atom. That sounds like a pretty good idea, but I haven't found an Atom board with the same packaging flexibility of this one. (actually I haven't looked very hard, I think there's a Via fanboy deep within me somewhere, lol).

    Still wide open to suggestions here, so fire away if you have any.

    Cuzza
     
  18. MKmods Case Mod Guru

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  19. Cuzza

    Cuzza

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    No memory on that board? Audio plug connector is too tall anyway!

    Oh yeah, not cheap, but hey, as far as the internet can tell me, no one has done this before. So I think it's worth it to break new ground.

    EDIT:

    Have found a New Zealand retailer for this Via board. NZ$607! = US$382 oh noes...

    EDIT 2:

    I see idotPC ships international. Will see how much that charge is...
     
    Last edited: Jul 6, 2009
  20. Cuzza

    Cuzza

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    I'm a bit stuck here

    These are the headers off the Sega board which the keyboard matrix ribbons plug into

    [​IMG]

    Now the ribbons go into these and then I need to connect the pins to the floppy cable somehow. I don't want to solder the wires directly onto the pins. Any suggestions?
     
  21. craigbru

    craigbru New Member

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    Very cool project. I always love when someone takes older hardware and updates it. I'll be watching, and good luck!
     
  22. Cuzza

    Cuzza

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    Progress....

    Hey team, here's what I've done today.

    Realised the original key diagram was wrong. Updated:

    [​IMG]

    Managed to answer my own question of how to connect the keyboard ribbon headers, by making an adaptor board. This will also save connecting the floppy cable wires individually. here's the plan:

    [​IMG]

    Nice pretty picture. Easier drawn than made though! Went and bought some bits and set to work soldering. I have never soldered a circuit board before so I quickly found my technique left a lot of room for improvement, but four hours later it was done:

    [​IMG]

    And the bottom, not so pretty!

    [​IMG]

    It all works though; I tested all the connections with the multimeter, everything seems just fine. Here it is connected:

    [​IMG]

    Phew, it has been a hard day to produce that, and my room is a mess! I have too much time on my hands. Luckily my assistant is working hard....

    [​IMG]

    Damn, I am totally committed now, no excuses. Things are looking good on the job front so I should be able to afford the bits I can't make.

    Peace out
    Cuzza
     
    dr emulator (madmax) says thanks.
  23. Yukikaze

    Yukikaze

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    Looking good ! :toast:
     
  24. Mark_Hardware

    Mark_Hardware New Member

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    lol @ the kitty....
    I will definitely be watching this. I am planning a mini ITX build in the future so I am always interested in what hardware people use.
     
  25. h3llb3nd4

    h3llb3nd4 New Member

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    GUd progress! cant wait:D
     

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