YPF

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Revision as of 20:59, 13 March 2015 by Orin (talk | contribs)
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Used in the following games:

  • Eroge! ~Sex and Games Make Sexy Games~

Structure

Header
Size Content Description
4Bytes Magic/ID "YPF/0"
4Bytes Unknown1 Static?
4Bytes Unknown2 File Count?
4Bytes Unknown3 Index Size?
16Bytes Unknown0 Padding?
Index Entry
Size Content Description
4Bytes Unknown1
1Bytes Unknown2 Possible filename length
?Bytes Filename
4Bytes Unknown3 Possible File size1
4Bytes Unknown4 Possible File size2 (compression?)
10Bytes Unknown5

Research

sn		30,869,553 		18	716

#  EntrySize    First 5bytes                    Filename size
01 36		22 03 5B AA 53			13+1
02 36		E3 48 2B 9A 53			13+1
03 36		92 2A 3B 9753			13+1
04 53		E0 81 A7 8D 5D			29+1
05 42		E9 AB B7 ED 42			19+1
06 33		8B D9 C2 E4 4A			10+1
07 36		83 1B EB E0 53			13+1
08 36		33 32 8B DD 53			13+1
09 51		50 1F C2 CE 5E			28+1
10 36		F3 94 0B 28 53			13+1

Hints:
B8 should be 00
53 should be 13 or 14

Comments

Index data may be protected.

XOR by FF then XOR by 40 may work.