Well, good luck 'modding' an SDXC card.
But I have to ask you, what is your overall point or goal to this thread? It is cool for informational purposes but nothing else will come out of it. Really, dont expect to see SDXC working natively in a wii ever (this comment will probably cause people to just do so).
My point of writing this thread if pretty simple. I searched for threads like this and in each one I could find people pretty much say it's impossible because of hardware and then the threads die. If enough people believe that it's impossible than no one will even take a look at it, but if people were aware that it's an identical issue to when people modded SD to support SDHC than maybe someone will take a closer look.
I love your ambition, which is 1,000x more than most anyone else that visits this site, but you seem to be one of the few that care enough about it, so probably the only way that it will happen is if your ambitions and curiosity causes you to do it yourself.
But hey man, good luck. And if you ever do develop anything then I will purchase an SDXC card to beta test for you.
I did at one time study hardware and software. I was certified in A+, Net+, and Windows 2000+ back in 2001. I dabbled in ASM, but I couldn't find any reliable courses. I also dabbled in C, C++, C#, Visual Basic, and the .NET framework. Along with a bit of HTML, PHP, and CSS. When I say "dabble" I mean enough to gain a basic understanding and write simple programs, but not enough to write anything particularly useful. Currently however I am going to college to become a Genetic Engineer and the amount of effort it takes to maintain a 4.0 GPA limits the amount of time I have to learn other subjects. If, however, there was some kind of tutorial set to learn how to mod the Wii I'd study it on my free time and apply the knowledge.
But you have to know that with this site (or really any forum in general), just because you have a good idea is not enough to cause the great devs of this community to get working. If you truly want to see it then you pretty much have to put your effort into it yourself.
Sorry, I wish I know coding better otherwise I'd try putting in some effort myself.
That is true, but at some point (eventually) the need for SDXC support will become apparant. (Unless of course the Wii-U turns out to be so ridiculously easy to mod that everyone abandons to Wii entirely.lol)
basically it all comes down to testing if the wii sd reader can talk to the card
afaict that should work in general
Good point. I read that some devices that are designed to read SDHC can already read SDXC without any changes to firmware, and those that can't should at least be able to format an SDXC card as SDHC.
all the "moding" needed to test this is mkdosfs (or similar)
if that works homebrew can add support for "unmoded" cards if and when a exfat lib is written
What would you suggest? I will be buying an SDXC card around March and at that time I would be more than happy to run some tests of my own and post results.