RomFS
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Overview
RomFS or Read-Only Filesystem is part of the CXI format, and is used as external file storage.
RomFS can be used:
- in conjunction with the ExeFS of a CXI
- to contain the game manual accessible from the Home Menu
- to contain the DLP Child CIA
- or to contain game cartridge update data
(There may be more implementations in the future)
Format
All of the content (including the header) in RomFS appears to be aligned to 0x1000 byte blocks.
The RomFS header is 0x80 bytes long and following is known about the structure:
| START | SIZE | DESCRIPTION |
|---|---|---|
| 0x00 | 0x4 | Magic "IVFC" |
| 0x14 | 0x4 | 2nd content size |
| 0x2C | 0x4 | 3rd content size |
| 0x44 | 0x4 | Main (1st) content size |
| 0x60 | 0x20 | Header Hash |