Recent content by NathaanTFM
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Gathering DS flashcard knowledge - DIY "opencard" idea
If you want to write your own program for your microcontroller, I think the best I can do is to explain how mine currently works? I'm not an expert in this field so there are most likely some parts that are wrong. The DS cartridge protocol is documented on GBATEK. It works like SPI but with 8...- NathaanTFM
- Post #147
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
I'm working on a budget with chips I can afford, and there's also limited space on a physical cartridge, so the best I can use are SPI NAND FLASH chips, which have slower read speeds. I have looked at some more SPI NAND flash chips, and it turns out the "slower" transfer rate (240µs before...- NathaanTFM
- Post #145
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
It still probably has to circumvent the DS security to reduce the read rate - I don't know a NAND chip able to load a 200h bytes region (at least, the first byte) in 5 us. But if you manage to increase the gap count before the game loads, then a NAND chip would definitely be fast enough without...- NathaanTFM
- Post #142
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
It's definitely more of a novelty than an actual product (the initial goal was to find a way to distribute my homebrew game without buying a bunch of aliexpress R4s because those usually suck). Making a flashcard could be interesting, but it would require "on the fly" game patching (like the...- NathaanTFM
- Post #139
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
Hey, I've finally got some good news! I'm working on a budget so I can't afford debugging tools and that's one of the reasons it takes so much time. But I've bought some cheap logic analyzer clones and it helped me debug the remaining issues! Turns out I was handling incorrectly some ARM state...- NathaanTFM
- Post #137
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
I've put the original SM64 ROM on the flash memory and managed to boot to the Nintendo logo. Unfortunately, probably the lack of the backup EEPROM prevents the game from going further. It doesn't seem like my current setup allows me to "simulate" this chip with the microcontroller - I'll give...- NathaanTFM
- Post #122
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
Can't currently give any update, but I'm definitely not giving this up and still planning to eventually open-source everything. Don't have enough free time for now, sorry!- NathaanTFM
- Post #120
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
That choice was only due to the fact that this was my cheapest option (and only one) on JLCPCB that had a chance to be fast enough. I looked at many other STM32 uCs, but none of them were available and I don't think I can request a part to only produce 5 pcbs. For reference, for qty=5, the...- NathaanTFM
- Post #113
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
Quick update on the cartridge: I have ordered a new prototype that is correctly wired to the SPI chip, and it seems to work (at least with DSi and 3DS - don't have a regular DS) I haven't implemented the SPI protocol yet (between the console and the cartridge), which prevents commercial games...- NathaanTFM
- Post #105
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
I have been working on a micro-controller powered cartridge and I can finally share some progress The chip contains a STM32G431CBU6 controller (170 MHz, $1.8/unit on JLCPCB) and a W25Q128JVSIQ SPI rom (which is currently unused). I've been optimizing my code on the last 3 days and I managed...- NathaanTFM
- Post #104
- Forum: Nintendo DS
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Gathering DS flashcard knowledge - DIY "opencard" idea
wouldn't pulling IRQ high (or not connecting it to GND directly) cause issues with cart detection on platforms that implements it? (such as the DSi, or maybe even the original DS?) every online documentation says it's connected to GND in cartridge (gbatek and that one are the only i'm aware...- NathaanTFM
- Post #93
- Forum: Nintendo DS
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Hacking Bricked Wii U
btw got my nnid acc back, cracked successfully (w/ Kafluke guide)- NathaanTFM
- Post #62
- Forum: Nintendo Wii U
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Hacking Bricked Wii U
Bought a new Wii U (45$ / 37€) on ebay, but can't transfer NNID because it's linked on the bricked wii u. Must I call Nintendo for that? I sent a mail (cuz no phone service for nnid accs).- NathaanTFM
- Post #54
- Forum: Nintendo Wii U
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