NSA: Difference between revisions
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| 4Bytes || Uncompressed Size || | | 4Bytes || Uncompressed Size || | ||
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Note: All numbers are big endian. | Note: All numbers are big endian. Why big endian on a little endian system? Go ask the developer. >.< | ||
== Research == | == Research == | ||
Revision as of 22:43, 8 July 2014
Used in the following games:
- Monster Girl Quest
- みずいろ
- 月姫
Structure
| Header | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Content | Description | ||||||||||||
| 2Bytes | Number of files | |||||||||||||
| 4Bytes | Index Size | |||||||||||||
| Index | ||||||||||||||
| Size | Content | Description | ||||||||||||
| (Length)+1Byte | File name | Terminated with 0x00 | ||||||||||||
| 1Bytes | Compress Switch | 00=false 01=true | ||||||||||||
| 4Bytes | Offset | |||||||||||||
| 4Bytes | Compressed Size | |||||||||||||
| 4Bytes | Uncompressed Size | |||||||||||||
Note: All numbers are big endian. Why big endian on a little endian system? Go ask the developer. >.<
Research
| First 5 Index Entries for 'arc.nsa' of みずいろ | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Index Size | Filename | Offset | Filesize1 | Filesize2 | ||||||||||
| 22bytes | b\00.jpg | 0 | 155636 | 155636 | ||||||||||
| 23bytes | b\001.jpg | 155636 | 140467 | 140467 | ||||||||||
| 22bytes | b\01.jpg | 296103 | 169994 | 169994 | ||||||||||
| 22bytes | b\01.jpg | 466097 | 136249 | 136249 | ||||||||||
| 22bytes | b\05.jpg | 602346 | 150570 | 150570 | ||||||||||
Two file sizes suggest the archive supports compression. However in this case, it does not appear to be used due to same size for both filesize values.