Yes, it's another operating system emulator and this time it's a DOS emulator for the Nintendo DS. Created as a NEO Compo 2008 entry by wolped, DS-DOS is an MS-DOS clone that serves as a file browser for the DS. Like the operating system that it was based on, DS-DOS will let users view, copy, move, delete, and rename files with the appropriate DOS commands, as enumerated below:

* date displays the date
* time displays the time
* cls clears the screen
* help displays help
* ver displays DS-DOS version
* del allows deleting of files copy allows copying of files
* move allows moving of files
* ren allows renaming of files
* dir displays a list of files and directories in current directory
* cd change the current directory
* lock locks the filesystem, preventing use of del/copy/move/ren
* ulok unlocks the filesystem allowing use of del/copy/move/ren

DS-DOS can also boot .nds files, which can be done by typing the filename. If the .nds file is placed in a folder, you need to type in the entire path (foldermyndsfile.nds) unless it's placed in the current active folder. There's a caveat, however: commands longer than five characters have the tendency to "break" certain commands. When this happens, simply restart DS-DOS.

To make use of this application, simply download the application from the link below. Make sure to check out the readme before installation. Enjoy!
*UPDATE* Nintendo DS homebrew developer wolped tweaked a bit with the entry DS-DOS, upping the version numbers to 0.41. The lone change? He added "Ability to copy files between cards." wolped added that the new function will allow "Copying/Moving/Deleting/Renaming on a secondary device."