Revision as of 05:41, 2 July 2017

For the content of the NCA FS which can be mounted, see here.

Metadata file

This is the file that ends in ".cnmt{.nca}" or "meta0.ncd". This seems to replace the TMD format.

There's at least 3 different filenames used for ".cnmt":

It starts with a header:

Offset	Size	Description
0x0	8	Title ID
0x8	4
0xC	1	Type (see Title Types)
0xD	1
0xE	2	Offset to table relative to the end of this 0x20-byte header.
0x10	2	Number of entries
0x12	14

An optional header can follow, depending on the title type.

At the end of the file following the entries is a 0x20-byte block, presumably a hash.

With update-format, there's additional data after the end of the entries specified in the header and before the ending hash.

Offset	Size	Description
0x20	8	Patch title ID
0x28	8

Offset	Size	Description
0x20	8	Original title ID
0x28	8

Offset	Size	Description
0x20	8	Application title ID
0x28	8

Each entry is 0x38 bytes:

Offset	Size	Description
0x0	32	Hash
0x20	16	NcaId [same as first 16-bytes of hash]
0x30	6	Size, same as the output from Content_Manager_services#GetEntrySize.
0x36	1	Type (0=meta, 1=program, 2=data, 3=control, 4=offline-manual html, 5=legal html)
0x37	1

@@ Line 3: / Line 3: @@
 = Metadata file =
 This is the file that ends in <code>".cnmt{.nca}"</code> or <code>"meta0.ncd"</code>. This seems to replace the TMD format.
+There's at least 3 different filenames used for ".cnmt":
+* "Application_{lower-case hex titleID}.cnmt"
+* "Patch_{lower-case hex titleID}.cnmt"
+* "SystemUpdate_{hex titleID}.cnmt"
 It starts with a header: