I Mounted A 2 Gig Sd Card!, Surprise, it's possible! :) Options

[DrWowe]

Thanks C-Guys!

I was poking around the driver for their WiFi card to investigate something. Then, I realized that they completely replace the sharp_sdmmc kernel module with their own SD/SDIO stack. So just for fun, I installed it and surprise, I can now read, write, and mount a Sandisk 2 GB SD card. So far, it's been working very reliably.

Now, the catches:

1) It works fine on my C760 (running Cacko 1.12). But, when I tried to install the modules on my 6000, I got kernel oopses. So, it may be very sensitive to the model/kernel that is running. This is not that surprising since C760 is one of the few models listed as supported on their website.

2) vfat filesystems are fine. I had some problems with ext2. I fixed it by reformatting my card with "mke2fs -b 1024 /dev/mmcda1". This driver doesn't seem to like block sizes > 1024.


Anyway, if you want to repeat my experiment, just download and install this ipk, and reboot the Zaurus:

http://c-guys.net/cgi-bin/download/passche...n_arm.ipk&key=1

[speculatrix]

the problem with the SL-6000 is that is uses the Toshiba Companion chip to do video (with acceleration), SD and some I/O glue. Thus the SD driver on the 6000 is completely different from the other models. Moreover, Toshiba have never released full technical specs on that chip - and at various times people with contacts at Tosh have tried very hard to get *some* sort of programmers reference guide.

I think because SD standard *was* closed, that Tosh felt impelled to keep the specification secret, and now that the chip is obsolete don't care any more that they could release it.

If you do have some way to contact Toshiba to get a detailed specification then there are many many of us who'd be very grateful.

Paul