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Documents Nintendo Classic Edition Teardown with David from Technophiles -- Episode 284
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  • Author Author: pchan
  • Date Created: 6 Apr 2017 7:20 PM Date Created
  • Last Updated Last Updated: 31 Mar 2017 7:24 AM
  • Views 1500 views
  • Likes 3 likes
  • Comments 11 comments
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Nintendo Classic Edition Teardown with David from Technophiles -- Episode 284

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Special guest David from the Technophiles podcast gets his hands on an NES Classic and shows it to Ben. Ben addresses one of the biggest shortcomings of the NES Classic by showing you how to extend the controller and hook it up to an oscilloscope to check the integrity of the signals!  He’ll also show you what’s inside the box and do a tear down of the hard to find retro console!

 

The first thing The Ben Heck Team did was unbox the NES mini. They found some manuals, a poster of the original Nintendo Entertainment System, some power and HDMI cords, the controller, and the unit itself.

Following the unboxing of the NES Classic Ben does a teardown of the controller and the unit itself. The controller uses a single sided PCB to save money.  There’s power, ground, serial data, and serial clocks. They’ll be looking at the signals from this using the oscilloscope. David also brought his Wii Pro Controller to try with the system and Ben takes that apart as well. It uses the same chip as the NES Mini Controller: WCP405. This means you can wire things up to the PCB of the NES Mini Controller and turn it into a pro controller.

After he’s done tearing apart the controller he does a teardown of the unit itself.  He discovers a heat sink and a thermal pad. The main board contains the system on a chip, hdmi, and all the power connections.  There’s an ARM processor, 256 mb of RAM, 512 MB of Flash storage memory, and a power management chip. On the back there is a chip that takes a parallel RGB image data and turns it into LVDS, differential signaling for HDMI.

Ben hooks the controller up to an oscilloscope to check the signals. They use the oscilloscope to read the BUS. After checking the I2C Bus on the scope Ben is confident he can extend the cord with little difficulty.  Next, he hooks up the Wii Pro Controller to compare the difference.

Finally, Ben looks into extending the controller cable. Ben wires an Xbox One cable to the NES Mini controller to extend the cord. If they are able to see a difference in the signals from the extended cord and the included cord for the NES Classic Mini it could shed some light on why Nintendo chose to include the shortened code.

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Top Comments

  • DAB
    DAB over 8 years ago +1
    Nice episode with good tips and techniques for working with legacy gear. DAB
  • panamajoecu
    panamajoecu over 8 years ago in reply to dbheale89

    That should be even easier!  Just take in the button signals, do a software de-bounce, and then send it out I2C (I believe, but check the episode to be sure).  The Attiny48 should work for that as well.  If you wanted a less complicated (non-surface mount) solution, the old atmega32 chips would work as well, they are just bigger.  You can start with those on breadboards without soldering a thing!  The arduino uno's are atmega chips and you can program the bare chip with an arduino.  I would start with an uno for software development and work your way up from there.

     

    I2C is mostly software btw, since it's just a communication protocol like ethernet.  The electrical signals are taken care of for you.

     

    The chinese solution doesn't sound nearly as fun or as good to me.  I've gotten lots of things from china that just never seem to last long.

     

    -Joe

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  • dbheale89
    dbheale89 over 8 years ago in reply to panamajoecu

    Hey Joe,

     

    I guess I'd rather not build a translator. What I want to do is just use the original PCB and swap out the IC chip with one that will work for the NES classic edition. So I would just need to know the output of the WCP-405 and figure out a way to reproduce those signals, no?

     

    Someone did create a translator here: Extenmote: NES, SNES, N64 or Gamecube controller on Wii or Wii U via the Wiimote.

     

    But do you think it's possible to have a chip that just reproduces the WCP-405 output instead of translating the TC4021BP (IC chip in the original controller)?

     

    My apologies if I have the wrong nomenclature for this stuff.

     

    Thanks,

    - Dave

     

    P.S. The more I think about this, the more I wonder if it's worth modding or if I should just get the circuit board from a cheap Chinese controller and slap it into an original controller for the feel.

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  • panamajoecu
    panamajoecu over 8 years ago in reply to dbheale89

    Shouldn't be too difficult. The scope is probably a good idea, more so for the old controller to get the signals. Not sure if someone has done it already, but it'll be a good side-by-side comparison if you have an old one lying around. I2C is a piece of cake.

     

    I have a Rigol scope that was around $300 new. EEVblog on YouTube has a lot of good recomendations, which is where I saw te rigol.

     

    If if you need a microcontroller primer, try this site:

    ECE 4760

     

    I took the course, but you get a lot from just going through the labs.

     

    I'm a mechanical engineer btw, so don't fret. Can't be that hard (once you read up on it). Let me know if you need guidance.

     

    -Joe

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  • dbheale89
    dbheale89 over 8 years ago in reply to panamajoecu

    Sounds good, but I only dabble in circuitry. I'm a software developer lol. Would it need special equipment like an oscilloscope?

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  • panamajoecu
    panamajoecu over 8 years ago in reply to dbheale89

    Seems to be a fairly simple design.  Maybe you can make a translator with the ATtiny48?  I2C to whatever they used for the original controller.  I believe it was only 4 pins.

     

    -Joe

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  • dbheale89
    dbheale89 over 8 years ago

    I'm attempting to get an original NES controller to work with the new NES Classic edition. The issue I'm having is finding the WCP-405 chip. Any suggestions?

     

    My other thought was to get a Chinese knockoff controller. Then I can just take the board and solder the traces I need to the original board.

     

    I would prefer to use the WCP-405 chip so I can add a home button to the controller.

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  • panamajoecu
    panamajoecu over 8 years ago

    As an idea for a follow-on show, maybe you can make the controller wireless?

     

    Sparkfun has these nice Particle Photon micro-controllers with built-in WiFi and I2C for $20.  A pair of them could extend the controller to anywhere within wifi range!  You might want to provide the Wifi code to the viewers though.  That part may be a bit advanced.

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  • kampy
    kampy over 8 years ago

    I'm wondering if it's possible to add analog video out like rca or vga

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  • cd_will
    cd_will over 8 years ago in reply to cd_will

    nesboy ?

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  • cd_will
    cd_will over 8 years ago

    portable nes mini ???????????????????????????????????????????????????????????????????????????????????????????????????

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