[GnatGoSplat]

I currently have a Mogul. I don't really text/type on my phone that much. I love the look and size of the Touch. I've installed the Touch keyboard/keypad on my Mogul and it works good enough for me that I don't need the real keyboard. I know GPS will be available for the Touch at some point. So after getting GPS, the Touch would be perfect for my needs and wants... if only it had Wifi.

So I've thought about how one could add Wifi to a Touch. One thought I had is to buy a MiniSD wifi card, using some kind of adhesive or double-sided tape to stick it to that empty RUIM spot on the circuit board, then use fine wires soldered to the MiniSD card to the appropriate solder pads on the MicroSD slot. However, the drawback is MicroSD storage cards wouldn't work (I don't think), and I'd need my MicroSD flash cards to work too.

It's possible to use two devices on an SD bus by multiplexing either the CMD or CLOCK lines. A multiplexing circuit should be fairly straight-forward. Using SMD components, a tiny PCB could be built that fits in the phone. However, using multiplexing requires the hardware and possibly the drivers to support using one of the host controller's outputs as a SD SELECT. I'm not sure there are SD SELECT outputs implemented in the MSM7500 or if they are, I don't know if the drivers would support it.

Anyone have technical info or datasheets on the MSM7500? I am curious how the Mogul is set up, does its Wifi chip tie into the SD bus with a multiplexer? I think some other devices do have their internal Wifi chips connected via SD bus, for example, I think the 6700 phones see the internal Wifi as a SDIO Wifi card (though physically, it's just a chip). Any other ideas or thoughts on adding Wifi?