The following article is a ROM map for Yggdra Union: We'll Never Fight Alone (PlayStation Portable).
General
This game uses CRIWARE. It is unknown if .afs files are CRIWARE archives.
The main archive file is data0.afs. The full path is PSP_GAME\USRDIR\Data\data0.afs.
All offsets below are absolute (i.e., relative to the start of the file) unless otherwise noted.
AFS File Format (main game data archives)
Header
| Offset |
What
|
| 0x0 |
IDSTRING = "AFS\x00" (hex: 41 46 53 00)
|
| 0x4 |
Number of files
|
File offsets table
| Offset |
What
|
| Entry size |
0x8. Offsets below are offsets within each entry.
|
| 0x0 |
Offset
|
| 0x4 |
File size
|
After this is 0x8 bytes with the location and size of the file information table.
| Offset |
What
|
| 0x0 |
Position of file information table
|
| 0x4 |
Size of file information table
|
File information table
| Offset |
What
|
| Entry size |
0x30. Offsets below are offsets within each entry.
|
| 0x0 |
File name and extension padded with nulls. Some files don't have a name.
|
| 0x20 |
File information. The function of the values is unknown.
|
FCT (archive file)
Example files 0000-ExiData.zlb (after decompressing) and 0524-B.
Header
| Offset |
What
|
| 0x0 |
FCT\x00
|
| 0x4 |
Number of files
|
| 0x8 |
File offsets table offset
|
| 0xC |
0
|
File offsets table
| Offset |
What
|
| Entry size |
0x8. Offsets below are offsets within each entry.
|
| 0x0 |
Offset
|
| 0x4 |
File size
|
