'''CPU-X4''', formally known as the '''Japanese Nintendo DSi Prototype''', is a prototype that was used for development of Nintendo DS or DSi software. This unit is completely different from a retail unit; the TwlIPL repo leaked as a part of the [[Zammis Clark Breach|2020 Zammis Clark breach]] dates the software that this unit runs to be around April 2, 2008, several months before the release of the DSi. | '''CPU-X4''', formally known as the '''Japanese Nintendo DSi Prototype''', is a prototype that was used for development of Nintendo DS or DSi software. This unit is completely different from a retail unit; the TwlIPL repo leaked as a part of the [[Zammis Clark Breach|2020 Zammis Clark breach]] dates the software that this unit runs to be around April 2, 2008, several months before the release of the DSi. |