NSA: Difference between revisions

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! Size !! Content !! Description
! Size !! Content !! Description
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| (Length)+1Bytes || File name || Terminated with 0x00
| (Length)+1Byte || File name || Terminated with 0x00
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| 1Bytes || Compress Switch || 00=false 01=true
| 1Bytes || Compress Switch || 00=false 01=true

Revision as of 22:40, 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.

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.