NSA

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Revision as of 22:29, 8 July 2014 by Orin (talk | contribs)
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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+2Bytes File name 2 0x00 placed after filename
4Bytes Offset
4Bytes Filesize1
4Bytes Filesize2

Note: All numbers are big endian.

Research

First 5 Index Entries for 'arc.nsa'
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.