NAND Boot Program

The NAND Boot Program is a developer tool packaged in various titles. While its purpose is not known, it mentions many things that were probably used internally.

It seems to be unconditionally loaded by Revolution OS (the disc version has not been checked yet), which may mean it is another name for the NANDLoader, and Nintendo never bothered to change the "DEVELOPER MODE" string since the debug strings are invisible on retail units.

Versions

Several versions have been found: the %s version in IOS15 and IOS21, the v1.1 version in some channels, and the v1.0 version in Forecast Channel dummy and News Channel dummy. v1.1 has a build string of release build: Oct 26 2006 16:22:40 (0x4199_60831), while %s has a build string of release build: Jul 31 2007 12:29:44 (0x4199_60831). The only other differences between v1.1 and %s seem to be that %s includes patches for the Internet Channel, and %s mentions RVA units.

v1.0's strings are identical to v1.1's, although the RVL_SDK - OS that follows has a build date of Sep 15 2006 for v1.0, and Sep 21 2006 for v1.1.

ESP

Error messages for ES_InitLib, ES_GetTitleId, ESP_OpenContentFile, ESP_ReadContentFile, ESP_CloseContentFile, and ESP_CloseLib can be found near the beginning of the strings. This suggests that ESP may have been a separate module from ES; possibly the same thing the P stands for in IOSP.

Dev units

There is a string in the %s version saying "Set Device Code : [RVA]", which probably means dev units used code RVA instead of RVL. Strings already exist in the System Menu that suggest that RVL is not used for dev units.

There also seems to be a file called /title/00000001/00000002/data/RVA.txt that is referenced.

Internet Channel patches

The %s version performs a "MEM1 patch" and a "MEM2 patch" on the Internet Channel. The details of this patch are currently not known.