Pmd2 SIR0
The SIR0 format is a pretty common wrapper file format. Its also fairly simple.
Also, when it gets loaded into memory, its magic number turns from SIR0 to SIRO, and all the offset its header contains are modified to be offset relative to the NDS's memory.
File Structure
Overview
| Offset | Length | Endianness | Type | Name | Description |
|---|---|---|---|---|---|
| 0x00 | 16 | Header | The SIR0 header | ||
| After Header | Varies | Content Data | The data wrapped by the SIR0. | ||
| After Content Data | Varies | Content Padding | Some 0xAA padding bytes inserted to align the next section on 16 bytes. May be omitted completely if not required. | ||
| After Content Padding | Varies | End of File Data Block | A block of data at the end of the file. Its purpose and format are still unknown.. | ||
| After End of File Data Block | Varies | End of File Padding | Some 0xAA padding bytes to make the file end on a size divisible by 16 bytes with no leftovers. |
Header
| Offset | Length | Endianness | Type | Name | Description |
|---|---|---|---|---|---|
| 0x00 | 4 | big | Magic Number | The 4 ASCII characters for "SIR0" (0x53 0x49 0x52 0x30) | |
| 0x04 | 4 | little | uint32 | Pointer to Content's Header | A pointer to the header of the data the SIR0 contains. If there are no headers, it points to the first byte after the SIR0 header. |
| 0x08 | 4 | little | uint32 | Pointer to End of File Data | A pointer to a block of data located after the contained data. |
| 0x0C | 4 | Null | 4 bytes of zeros. |