ncm

Cmd Name Notes
0
1
2
3
4 GetContentStorage
5 GetContentMetaDatabase
8
9 InitializeStorageForMediaId
10 UninitializeStorageForMediaId
11 InitializeDatabaseForMediaId
12 UninitializeDatabaseForMediaId

All of the above cmds takes a u8 as input.

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 #GetNcaTitleInfo
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?

GetNumberOfEntries

Writes the total number of entries which can be read by GetEntries, to cmdreply <SFCO_offset>+0x10.

GetEntries

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

Each entry is a #NcaID.

The total read entries is exactly the same as the number of "<hex>.nca" directories in the storage FS(or at least under the "registered" directory?).

GetEntrySize

Takes a #NcaID as input.

Returns the total size readable by ReadEntryRaw. This is the same as the size field from offset 0x28 in the NAX0 header in the "<NcaID>.nca/00" file. This matches <filesize of that file>-0x4000.

ReadEntryRaw

Takes an output buffer, a #NcaID as input, and a u64 file offset.

Returns encrypted looking data. Doesn't match the encrypted raw data in the "<NcaID>.nca/00" file.

See GetEntrySize for the total size readable with this.

GetNcaTitleInfo

Takes a #NcaID and returns the following 0x10-sized entry.

With some NcaIDs this may return 0 with an all-zero output entry. This seems to be the case for most/all (?) NandSystem NcaIds?

Offset Size Description
0x0 0x8 Big-endian titleID
0x8 0x8 Unknown. Usually zero?

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 #GetTitleList Takes a type-6 buffer, each entry being 24 bytes, and a u8/bool. Returns two u32's.
8 Takes a 0x10-sized entry. Returns a bool/u8.
9 Takes a type-5 buffer, each entry being 16 bytes. Returns a bool/u8.
10 Takes a 0x10-sized entry. Returns a u64.
11 Takes a 0x10-sized entry. Returns a u32.
12 Takes a 0x10-sized entry. Returns a u64.
13 Void.
14 Takes a type-6 byte buffer, and a type-5 buffer with each entry being 16 bytes.
15 EndIteration Void.
16 Takes two 0x10-sized entries. Returns a bool/u8.
17 Takes a type-6 buffer, each entry being 16 bytes, a 0x10-sized entry and a u32. Returns a u32.
18 Takes a 0x10-sized entry. Returns a bool/u8.
19 Takes a 0x10-sized entry. Returns a u32.

GetTitleIdInfo

Takes a u64 title-id as input, returns same title-id together with info struct.

struct title_info {
  u32  version;
  u8   type;
  u8   pad[3];
};

GetTitleList

Each 24-byte entries is as follows:

 u64    title_id_update;
 struct title_info info;
 u64    title_id;

NcaID

This is a 0x10-byte entry. This is originally from the hex portion of "<hex>.nca" directory-names from this storage FS(like SD).

Enums

Title Types

Value Description
0x01 System executable titles? (Titles with TID 01000000000000XX or 01000000000010XX)
0x02 System Data Archives
0x03 Unknown. Only used for title 0100000000000816?
0x04 Firmware package A
0x05 Firmware package B
0x80 Regular application
0x81 Update title