This page details one or more prototype versions of Nintendo DS.
These prototype firmwares (referred in the settings as "NITRO-BOOTMENU") are completely different from the final firmware. The settings especially have a strong resemblance to the prototype DSi System Settings, indicating that these were just common placeholder menus before any real work was done on developing a user-friendly interface.
Dated June 15, 2004. Blood types?
Presumably dated August 20, 2004. Now with a main menu!