Hardwired Famicom to NES adapter with CIC?

Discussion in 'Modding and Hacking - Consoles and Electronics' started by neverused, Apr 18, 2016.

  1. neverused

    neverused Member

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    I'd like to hardwire a Famicom to NES adapter into a shell to save space, but would like to include the CIC from the NES donor cart. I imagine that the pinout should match up with this:
    http://nesdev.com/NES_ADAPTER.txt
    plus the CIC. However, I have seen the chip attached to an adapter, but additional resistors, capacitors, and a transistor were used. When I look at most pcbs I tend to only see an additional capacitor. Can anyone help me figure out how to incorporate a CIC into a hardwired adapter?

    Thanks!
     
  2. neverused

    neverused Member

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    Can anyone offer advice?
     
  3. Kaicer

    Kaicer Site Supporter 2014

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    Why dont you better disable the piracy protection chip on the NES itself? Is easier cut one leg and go.
     
  4. neverused

    neverused Member

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    I had considered that, but this is for a gift for a friend who I would not expect could make the modification. I don't mind altering the cartridge in order to make it playable on all NES control decks.
     
  5. l_oliveira

    l_oliveira Officer at Arms

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    This stuff is no brainer. Take a retail, existing adapter and a cart you can spare the CIC from. Pop the CIC out and rig it up on the adapter exactly as it was on the original cart. Presto! It's done.
     
  6. neverused

    neverused Member

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    Yes I acknowledged that approach, my question lies with the additional components seen in other pictures around the Internet. I believe they were part of a knock out circuit, but I thought I would ask if any of it was necessary.
     
  7. l_oliveira

    l_oliveira Officer at Arms

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    Additional components would be a bypass ceramic capacitor "104" or 100nf(nano farad) and a electrolytic capacitor of 10uf(micro farad) to stabilize the power rails. Both connected between +5v and GND near the CIC chip.

    If you use a real CIC, you don't want/need the knock-out circuit.
     
  8. neverused

    neverused Member

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    Prefect! Thank you that's what I was trying to figure out.
     
  9. l_oliveira

    l_oliveira Officer at Arms

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    Glad to be of help. Keep in mind that you're best off removing the knock-out circuit completely.
     
  10. dc16

    dc16 Dauntless Member

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    This really sounds so complicated. Taking apart the NES is easy enough, and I did it on my first try. Disabling the CIC chip would just require grounding a single pin. Although you may actually be in the UK or something.
     
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