Custom 7x0 ROM

Instructions to Update/Flash

Note - you can see an english translated listing of the boot menu (service menu) here - [1]

Flash to new Custom 7x0 ROM

Make sure you have the updater.sh and initrd.bin files in the root of your cf/sd card.
(Yes, you can use either cf or sd to flash now!)
Make sure the Zaurus isn't plugged into AC power.
Remove battery for at least 5 seconds.
Replace battery (replace battery cover, lock cover), plug in AC power.
Press and hold the "OK" button on the keyboard.
Turn the power on, you should see the Japanese service menu:
http://www.oesf.org/howto/images/maint-menu-s.jpg
Now Plug in the Power Cord.
(You will get an error if it isn't plugged in!)
Select option 4 (flash/update).
You then have four options (1. USB, 2. CF, 3. SD, 4. ?? it's in Japanese!)
Choose either option 2 or 3, depending on which media you put the files on.
I don't know what it would take to use option 1 as I don't use the USB connector at all with my Zs.
Select Yes in the confirmation window (left option with the "Y").
( If you don't get a Yes/No choice you don't have the Power Plugged in!)
Screen will go black for a couple seconds, you'll then get the Sharp
splash screen (Sharp logo in red, Japanese characters below).
Then the screen will go black, and display
"--- Zaurus CF updater ---" and you can monitor the progress.
It will finish, and reboot your Z automatically.
After reboot, turn off your Z and proceed with the Format Internal Flash instructions.

Format Internal Flash

Perform steps 1 - 7 above (to get to the service menu):
http://www.oesf.org/howto/images/maint-menu-s.jpg
Select option 3 (Erase all / Format (all data will be lost!))
You should then get a confirmation message (in Japanese) with a Yes/No
option (left one is Yes). Click the Yes button to confirm.
(If you don't get this, then you don't have the AC power plugged in.)
Wait, get some coffee/tea, watch the pretty screen.
Send Sash lots of money to say "Thanks!" for building this nice custom ROM...