2014-10-29, 01:59 AM
Interesting. I just looked at the .T header and I thinks it's a classic table structured for CD storage. The first 2 bytes are the number of files in the archive just like you said.
The rest of the header looks like a table of contents (ToC) listing the number of CD sectors to where the given file begins in the archive. i.e. There are 0x800 bytes of usable data in each PS1 CD sector, so its the ToC number times 0x800. The first entry is always "0100" because the first file always starts at 0x800 Unless the ToC happens to be longer than 0x800- which probably never happens.
At the end of every file I looked at, there is a 4 byte value. Those appear to be Fromsoft's tamper-proofing checksums. I knew the existed on text graphics, but they may also be used on 3D models etc. If so, they'll make the game freeze if anything is edited. That tool I posted awhile back to "enable editing" should fix some/all freezes.
The rest of the header looks like a table of contents (ToC) listing the number of CD sectors to where the given file begins in the archive. i.e. There are 0x800 bytes of usable data in each PS1 CD sector, so its the ToC number times 0x800. The first entry is always "0100" because the first file always starts at 0x800 Unless the ToC happens to be longer than 0x800- which probably never happens.
At the end of every file I looked at, there is a 4 byte value. Those appear to be Fromsoft's tamper-proofing checksums. I knew the existed on text graphics, but they may also be used on 3D models etc. If so, they'll make the game freeze if anything is edited. That tool I posted awhile back to "enable editing" should fix some/all freezes.