Meshing around with my SL-C760 and looking for trasnlated Japanese sites, I found 2 more ways of accesing the Service menu and the Diagnostic menu.
AS you can see, the lat one (Fn+D+P) shows every option that is hidden in the others menus. I can´t take advantage of that information but I´m sure somebody will . Probably it will work with the others models.




I didn´t still mesh around with the whole menus, but maybe it will bu usefull.
Thanks

Plus a found anoter this one in Japanese:

http://www.h5.dion.ne.jp/~rimemoon/zaurus/memo_006.htm

that yoy can translate into English by using:

http://www.worldlingo.com/en/websites/url_translator.html

about the Memory map of built-in Flash.
Thanks