Forest of Illusion on Twitter: "We've preserved a prototype of the Nintendo DS firmware! It was recovered from an X4 prototype unit and the menu notes it as being ver. 40820D. The
Homebrew Hacker Explains Recent DSi Update - News - Nintendo World Report
Nintendo DS firmware prototype had a different start-up sound | GoNintendo
Nintendo DS Firmware 'Prototype' Reveals System's Unique Boot Up Sound Effect | Nintendo Life
Newest Nintendo 3DS firmware update adds Home Menu layout saving - Vooks
3DS System Update 11.16.0-49 Is Now Live, Here Are The Full Patch Notes | Nintendo Life
GitHub - noceb0/fwrun: boot nds firmware dumps on nds/dsi/3ds
Nintendo 3DS Firmware Update Live in All Regions - News - Nintendo World Report
systems:nds [Batocera.linux - Wiki]
Nintendo 3DS firmware update improves eShop and 'system stability and usability' - Polygon
Nintendo DS Firmware (Japan) (Prototype) (ver. 040615) : Nintendo : Free Download, Borrow, and Streaming : Internet Archive
How to install Custom Firmware on DSi - 2019 - YouTube
Dsi Firmware v1.4.3 Update - YouTube
Prototype DS firmware dumped, included blood type selection, different startup sound | Page 3 | GBAtemp.net - The Independent Video Game Community
DS prototype firmware let you choose your blood type | GoNintendo