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=== Overview ===
=== Overview ===
RomFS or Read-Only Filesystem is part of the [[NCCH]] format, and is used as external file storage.
RomFS (or Read-Only Filesystem) is part of the [[NCCH]] format, and is used as external file storage.
RomFS can be used:
RomFS can be used:
=== Format ===
=== Format ===
The RomFS is wrapped inside a IVFC hash-tree container, and the actual data is structured like a node-based tree, starting at the root level directory node, moving down to other directory and file nodes. Each directory node has pointers to child directory nodes and siblings, together with a pointer to the first file node for that directory. Each file node has pointers to their next file node, together with information about the actual file data.
The RomFS header is 0x80 bytes long and following is known about the structure:
The RomFS IVFC hash-tree header is 0x5C bytes long and is structured as follows:
{| class="wikitable" border="1"
{| class="wikitable" border="1"
| Optional info size.
| Optional info size.
|}
|}