Internal SD to GC Mem Slot

This is pretty straight forward and easy as heck if you're able to solder.

Items needed:
Soldering Iron with fine tip
Solder with internal resin
6 small gauge wires of varying colors
Heat Clamp
Tape
Tri-Wing Driver
Size 0 and 1 Screw Drivers

Wii Disassembly

Pre Disassembly tip: Back up all game saves on a SD card.

In order to get to the parts that we're going to need to modify you have to fully disassemble your Wii.  I'm guessing that you have the tools to do this, if you need assistance on what to pull apart and when see this link: Wii Disassembly Tutorial

Now I'm not sure what all you'll lose by not having it attached other than your system clock and date, but I kept the battery on the board as much as possible and during disassembly only had it detached for about a max of 5 seconds at a time and once I had it fully disassembled I taped it into it's receptical slot while I worked on my mod.

Wire Preperation

I just found a connector cable extra from my PC to use, it's suppose to go from the sound card to the front connector of my case, but you can of course use anything with simular gauged wire, stranded will result in better connections, but single wire is going to be easier for those that aren't good solderers.

I pulled out all but five of the wires then stripped the tips of the remaining five and tinned them.  This made the black section of the cable much easier to flatten for when I screwed it back together and you only need a total of 6 wires any way and only 5 run the length of the board.

Soldering the GC Memcard Side

The GC Memory Card Pinouts located right next to the USB in the back, easy enough.

Here's the Pinout Connection Scematic, top set, Slot B, bottom, Slot A:

When soldering your connections I'd sudjest taping down the Black Section (tube) or other ends of the wire that way when you're shifting around the wire you're working on that it doesn't break loose your other previously soldered connections.

The Black wire you see is bridged between all the pins that need to be grounded to the Ground pin on the left hand side.

The White Wire is bridging the Sense functions together to eliminate the need for a switch and or the need to run that connection the length of the board. I've found that the Wii will auto resense switching between SD cards and GC cards without the need to manually break this sense connection unlike a GC.

Soldering the Wii SD Card Side

Run the 5 wires to the opposite end of the board, I'd sudjest having them wrapped inside of something to prevent any interference with the board and also just to protect them from shorting. Also tape down your connections all along to prevent flexing while working with the other end and breaking loose your presoldered connection.

(Check out those sweet pants)

We don't need to hook anythign to the the GR, 3, 6, or 9 slots, by the Wii's mainboard construction they're already grounded.

(TAPE IT TRUST ME!)

 

Data Charts Sum'd Up

Easy Conversion Chart for the cables and the colors I used for them for reference:

SD Card Layout:

GC Card Layout:

Final Words

Put the dang thing back together! I left a piece of tape on the black section to keep it put so it would not get pinched inbetween the board and the metal risers as well as put a piece of tape over the top of the GC pins due to the fact that my soldering there was less than pretty and I didn't want it to contact the metal underframe at all either otherwise yah, that'd cause issues.

After reassembly I was able to dump DVD's using the 1.3config disk and the DVDdump program to a 2gig SD card at the rate of 1,800KB/sec., the max rate that the Wii can output is around 6,400KB/sec. but will vary depending on the speed of your SD card. Also I was able to run both N64 and SNES roms off it.

In a N64 game you only need to insert the GC mem card after you remove the SD Card (you actually don't even need to remove the SD card but I'd sudjest it for data safety) and it'll autorecognise the insertion of the GC mem card and allow you to save/load just as normal.

Also it'll still recognise normal SD card data and information while in the Wii storage control panel and GC data in the Wii storage control panel, just pop out the SD card prior to throwing in the GC card.

Problems?

None that I know of or have seen, even having both mem cards in at the moment proves not to be an issue, it will read the GC mem card over the SD card.  Worse comes to worse you pop the mem card out (either SD or GC) if it's not reading, push it back in and it recognises.  Any one find ANY issues let me know and I'll double check and confirm them but can't forsee any.  And as always....

Happy Modding=]