A Developer (or Test) 3DS has two GUIs which can be used as a primary interface. Description of homemenu interface was taken from observations of a PAL 3DS Development Unit with Firmware 0.15.8 (revision 37901). Description of testmenu was taken from testmenu v0.24.3 (revision 60260) cia.

The simple fact of the matter is that every aspect of the retail mimicking software on a developer 3DS, is that they can be updated at the will of the developer. It will run any revision of any system software provided it is compatible with the 3DS’ revision and signed properly. The Home Menu revisions for developer 3DS’ are usually identical in format to the retail 3DS Home Menu, however, the developer Home Menu differs from its retail counter-part in the following ways:

The following is a description of the functions what is possible with the applications unique to 3DS Development Units.

For information on 3DS Development Hardware see 🔗 1

There are two kinds of system updaters for dev (panda) units, CTR System Updater (CSU) and SNAKE System Updater. As the names imply, the former is for original 3DS and the latter is for New 3DS. They are used to update the panda unit’s ‘firmware’/SDK Version. The romfs of the CSU contains the contents that will be installed to NAND. They contain all system titles as well as Devmenu and Config.