Difference between revisions of "NCA"
From Nintendo Switch Brew
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This is the file that ends in <code>".cnmt.nca"</code> or <code>"meta0.ncd"</code>. | This is the file that ends in <code>".cnmt.nca"</code> or <code>"meta0.ncd"</code>. | ||
| − | It starts with | + | It starts with a header: |
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
|- | |- | ||
| Line 11: | Line 11: | ||
| 0x0 | | 0x0 | ||
| 8 | | 8 | ||
| − | | | + | | Title ID |
|- | |- | ||
| 0x8 | | 0x8 | ||
| Line 36: | Line 36: | ||
| 14 | | 14 | ||
| | | | ||
| + | |} | ||
| + | |||
| + | An optional header can follow, depending on the title type. | ||
| + | |||
| + | == Application header == | ||
| + | {| class="wikitable" border="1" | ||
| + | |- | ||
| + | ! Offset | ||
| + | ! Size | ||
| + | ! Description | ||
| + | |- | ||
| + | | 0x20 | ||
| + | | 8 | ||
| + | | Patch title ID | ||
| + | |- | ||
| + | | 0x28 | ||
| + | | 8 | ||
| + | | | ||
| + | |} | ||
| + | |||
| + | == Patch header == | ||
| + | {| class="wikitable" border="1" | ||
| + | |- | ||
| + | ! Offset | ||
| + | ! Size | ||
| + | ! Description | ||
|- | |- | ||
| 0x20 | | 0x20 | ||
| − | | | + | | 8 |
| − | | Original title- | + | | Original title ID |
| + | |- | ||
| + | | 0x28 | ||
| + | | 8 | ||
| + | | | ||
| + | |} | ||
| + | |||
| + | == Add-on content header == | ||
| + | {| class="wikitable" border="1" | ||
| + | |- | ||
| + | ! Offset | ||
| + | ! Size | ||
| + | ! Description | ||
| + | |- | ||
| + | | 0x20 | ||
| + | | 8 | ||
| + | | Application title ID | ||
| + | |- | ||
| + | | 0x28 | ||
| + | | 8 | ||
| + | | | ||
|} | |} | ||
| + | |||
| + | == Content records == | ||
Each entry is 0x38 bytes: | Each entry is 0x38 bytes: | ||
Revision as of 19:08, 23 June 2017
Contents
Metadata file
This is the file that ends in ".cnmt.nca" or "meta0.ncd".
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 |
| 0x10 | 2 | Number of entries |
| 0x12 | 14 |
An optional header can follow, depending on the title type.
Application header
| Offset | Size | Description |
|---|---|---|
| 0x20 | 8 | Patch title ID |
| 0x28 | 8 |
Patch header
| Offset | Size | Description |
|---|---|---|
| 0x20 | 8 | Original title ID |
| 0x28 | 8 |
Add-on content header
| Offset | Size | Description |
|---|---|---|
| 0x20 | 8 | Application title ID |
| 0x28 | 8 |
Content records
Each entry is 0x38 bytes:
| Offset | Size | Description |
|---|---|---|
| 0x0 | 32 | Hash |
| 0x20 | 16 | NcaId [same as first 16-bytes of hash] |
| 0x30 | 6 | Size |
| 0x36 | 1 | Type (0=meta, 1=program, 2=data, 3=control, 4=offline-manual html, 5=legal html) |
| 0x37 | 1 |
