Config Savegame

This page describes the format of the Cfg NAND savegame. These blocks can be accessed with the Cfg service commands.

Structure of save-file "/config"

Offset	Size	Description
0x0	0x2	Total entries
0x2	0x2	?
0x4	0x4558	Block entries
0x455C		Data for the entries

The filesize for this /config file is 0x8000-bytes.

Configuration block entry

Offset	Size	Description
0x0	0x4	BlkID
0x4	0x4	Offset to the data for this block when size is >4, otherwise this word is the data for this block.
0x8	0x2	Size
0xA	0x2	Flags

Configuration blocks

BlkID	Size	Flags	Description
0x00080000	0xC00	0x2?	Wifi configuration slot0.
0x00080001	0xC00	0x2?	Wifi configuration slot1.
0x00080002	0xC00	0x2?	Wifi configuration slot2.
0x00090000	0x8	0x2?	This contains a u64 ID, used by processes using NWMUDS:Initialize. The first word is the same as LocalFriendCodeSeed, while the latter is a separate random word.
0x00090001	0x8	0xE	This console-unique u64 used by GenHashConsoleUnique is generated with the LocalFriendCodeSeed and with random data.
0x000A0000	0x1C	0xE	See below.
0x000A0002	0x1	0xA	Language
0x000B0000	0x4	0x8	CountryInfo
0x000F0000	0x10	0x8?	Unknown, used by NS on dev-units for svcKernelSetState, where Type is 6.
0x00110000	0x4	?	The low u16 indicates whether the system setup is required, such as when the system is booted for the first time or after doing a System Format: 0 = setup required, non-zero = no setup required.
0x00110001	0x8	0xA?	TitleID of the menu to launch, used by NS on dev units. (This block can be edited on dev units with Config)

The dev unit TID block only exists on dev units.

Languages

ID	Description
0	ja
1	en
2	fr
3	de
4	it
5	es
6	zh
7	ko
8	nl
9	pt
10	ru

CountryInfo

Byte	Description
0	?
1	?
2	?
3	Country code, same as DSi/Wii country codes. Value 0xff is invalid.

0x000A0000 Block

Byte	Description
0x0-0x13	UTF-16 username, with no NULL-terminator.
0x14-17	Usually zero?
0x18-0x1B	?