nesdev.org

Well, at this point I really need to figure out whether or not I have any way of testing this thing once I've built it. I don't have an SNES flashcart, so I can't run my own code. On your project page, you mention several potential use cases that sound like they could be done with retail carts. Coul...

I'm not using an extension cable for my board, I'm using the cable from a couple posts back. It has the female controller port on one end and a standard Molex connector on the other. My board will have the passthru port mounted permanently (on the left of the board in this image), and a Molex header...

I finally got around to mounting header pins on the controller ports. The pinout on the ports was broken out to 2.50mm , so I had to bend the 2.54mm pins a bit to get them to fit, but I bent them back afterward and they work just fine in a breadboard. I also transplanted the extra pins while I was a...

I managed to get it all traced only to realize I had flipped one of the headers >.< Oh well, I think this should be good, other than perhaps choosing a different crystal and/or reset button. I may also consider adding another LED so I have one for power, one for monitoring Rx, and one for monitoring...

I finally got around to opening my Naki Tribal Tap, and was pleasantly surprised to find that the 7-connector cable is actually terminated on the board side by a 0.1" Molex connector. That, and the controller ports are each attached to a small board that breaks out to 0.1" through-hole hea...

As far as the cost goes, that's more a matter of cost to build than anything. I'm not expecting to sell any. Routing traces ended up being far less painful than I expected. I may add a power indicator LED to the USB power line, that wouldn't take much. It wouldn't take much to modify this board for ...

Now that I've hunted through the documentation and various schematics, I think I've finalized the board, so I can start tracing. With this, I also have a pretty good idea on price. ATMega16U2-AU: $4 ISL84544H: $1 USB-B Header: $1 16MHz Crystal: $0.50 Resistors/Caps/LED: $1-2 Reset Switch (optional):...

Just wondering, but does your USART adapter make any use of the LED on the Teensy++? That's the one pin assignment I'm still unsure of with regards to porting the design over to the 16U2. Everything else matches up great, I'm just not sure on the LED. It's getting annoying enough to track it down th...

I managed to get the code to compile for the Atmega*U2 series chips, even all the way down to the 8U2 (though I'm not going to bother with it since the 16U2 costs $0.01 more than the 8U2 and has the same footprint and pinout, but twice the flash memory). I'm waiting to hear back on a second opinion ...

>In this case, worst case, I'd probably try soldering wire between each pin of a through-hole connector to a through-hole IDC header. Whatever works. If that SMD socket works, looking at the footprint, I would guess the pins would be large enough to accommodate soldering an IDC cable directly to th...

I am less fine with it being a surface mount connector. Getting that wired up to a breadboard for prototyping will be an absolute nightmare. Surface mount isn't as nasty as it seems. Before last spring term, I had absolutely 0 surface mount experience. After a dozen projects or so this summer, I'm ...

Here's something that might be made to work for the expansion port connector. You'd have to buy a 40-pin version and take a hacksaw to it, maybe a dremel as well if the plastic housing was too wide... http://www.samtec.com/ProductInformation/TechnicalSpecifications/Overview.aspx?series=MEC2-DV Edit:...

Well, as lidnariq mentioned, this design is limited to USB full-speed 12Mbit speeds. Otherwise, it shouldn't be too incredibly difficult to make this work with the expansion port, you just won't hit your speed goal (though it should still be considerably faster than the controller port model). I sti...

Getting the code to compile for the Teensy was fairly trivial (there was only 1 incompatibility vs. the Teensy++), but targeting the 16U2 is going to require a bit of hunting through datasheets. In the meantime, I drew up a schematic (which I'll need to double and triple-check, especially for differ...

Just for kicks, I'm going to build myself a controller port based one around an Atmega16U2, seeing as I have a few of those laying around at the moment. I'm not sure exactly what I'm going to do with it, since I don't have a flashcart (I've been meaning to buy myself an SD2SNES, but I can't afford i...