NCM services

ncm

Cmd	Name	Notes
0		Takes a u8 as input.
1		Takes a u8 as input.
2		Takes a u8 as input.
3		Takes a u8 as input.
4	GetContentStorage
5	GetContentMetaDatabase
8		Takes a u8 as input.
9	InitializeStorageForMediaId
10	UninitializeStorageForMediaId
11	InitializeDatabaseForMediaId
12	UninitializeDatabaseForMediaId

IContentStorage

Cmd	Name	Notes
0	#GetRootEntry
1		Takes two 0x10-sized entries, and a u64.
2		Takes a 0x10-sized entry.
3		Takes a 0x10-sized entry, returns a bool/u8.
4		Takes a 0x10-sized entry, a u64, and type-5 array.
5		Takes two 0x10-sized entries.
6	DeleteContent?	Takes a 0x10-sized entry.
7		Takes a 0x10-sized entry, returns a bool/u8.
8		Takes a type-0x1A string and a 0x10-sized entry.
9		Takes a type-0x1A string and a 0x10-sized entry.
10		Void.
11		Takes a type-6 buffer, each entry 0x10 bytes, and returns a u32.
12	#GetNumberOfEntries
13	#GetEntries
14	GetEntrySize
15		Void.
16		Takes three 0x10-sized entries.
17		Takes a 0x10-sized entry and a u64.
18	#ReadEntryRaw
19		Takes a 0x10-sized entry and returns another 0x10-sized entry.
20		Takes a 0x10-sized entry and returns another 0x10-sized entry.
21		Takes a 0x10-sized entry, a u64, and a type5 buffer.
22	GetFreeSpace
23	GetTotalSpace

GetRootEntry

Returns an entry of 16 completely random-looking bytes. It is not possible to read this entry.

Changes on reboot?

GetEntries

Takes an output buffer, u32 offset and gets all entries starting at that offset. Returns number of entries read.

Each entry is 16 completely random-looking bytes.

ReadEntryRaw

Takes an output buffer, a 16-byte entry as input, and a u64 file offset.

Returns encrypted looking data.

IContentMetaDatabase

Cmd	Name	Notes
0	InsertContentEntry?	Takes a 0x10-sized entry, a type-5 buffer and a u64.
1		Takes a 0x10-sized entry, a type-6 buffer and a u64. Returns a u64.
2		Takes a 0x10-sized entry.
3		Takes a 0x10-sized entry and a bool/u8. Returns an 0x10-sized entry.
4		Takes a type-6 buffer, each entry being 24 bytes, 0x10-sized entry and a u32. Returns a u32.
5	Iterate	Takes a type-6 buffer, each entry being 16 bytes, a 0x10-sized entry, and a u32. Returns a u32.
6	#GetTitleIdInfo
7		Takes a 0x10-sized entry, returns u8/bool.
8		Takes a type-0x1A string and a 0x10-sized entry.
9		Takes a type-0x1A string and a 0x10-sized entry.
10		Void.
11		Takes a type-6 buffer, each entry being 16 bytes. Returns a u32.
12		Returns a u32.
13		Takes a type-6 buffer, each entry being 16 bytes, and a u32. Returns a u32.
14		Takes a 0x10-sized entry, and returns a u64.
15	EndIteration	Void.
16		Takes three 0x10-sized entries.
17
18
19

GetTitleIdInfo

Takes a u64 title-id as input, returns same title-id together with 8 unknown bytes.

For BotW cartridge they are "00 00 00 00 80 00 00 00".