TLDR: I need help replicating a save file checksum
This is my very first time trying to edit a save file, and thankfully it is not encrypted. I know this because I have managed to isolate individual bytes whose values correspond exactly to game data. But unfortunately any modifications trigger a "corrupt save" error, which generates a blank save file. Even though I'm 100% sure the value(s) I'm modifying are legal, which leads me to believe that there is a checksum that I'm not replicating.
Has anybody come across this before, are there standard checksums that the game devs may have used?
Game: Tekken 3D Prime Edition (namco)
The values of the following 7 addresses are always different between save files, but I do not know what they correspond to yet...
0x0000
0x0001
0x0002
0x0003 checksum ?
0x0C14
0x0C15 16 bit value?
0x23D8 always increases in value
Aside: Are values likely to be big endian or little endian? e.g. for a 16 bit value, are the 2 bytes in order or reverse?
These are the addresses which I have 100% figured out. I'm not wasting anymore time finding more, until I I overcome this checksum problem.
0x0004 difficulty (00 01 02 03 04)
0x0005 round count (00 01 02)
0x000A stage side preference (00 01)
0x221F Dragunov rank (00 - 28)
0x2484 Dragunov wins (00 - FF)
0x2530 Dragunov loses (00 - FF)
0x3B0E card points (00 - FF)
Edit: I can provide the 6 save files I have generated, along with the annotated differences
This is my very first time trying to edit a save file, and thankfully it is not encrypted. I know this because I have managed to isolate individual bytes whose values correspond exactly to game data. But unfortunately any modifications trigger a "corrupt save" error, which generates a blank save file. Even though I'm 100% sure the value(s) I'm modifying are legal, which leads me to believe that there is a checksum that I'm not replicating.
Has anybody come across this before, are there standard checksums that the game devs may have used?
Game: Tekken 3D Prime Edition (namco)
The values of the following 7 addresses are always different between save files, but I do not know what they correspond to yet...
0x0000
0x0001
0x0002
0x0003 checksum ?
0x0C14
0x0C15 16 bit value?
0x23D8 always increases in value
Aside: Are values likely to be big endian or little endian? e.g. for a 16 bit value, are the 2 bytes in order or reverse?
These are the addresses which I have 100% figured out. I'm not wasting anymore time finding more, until I I overcome this checksum problem.
0x0004 difficulty (00 01 02 03 04)
0x0005 round count (00 01 02)
0x000A stage side preference (00 01)
0x221F Dragunov rank (00 - 28)
0x2484 Dragunov wins (00 - FF)
0x2530 Dragunov loses (00 - FF)
0x3B0E card points (00 - FF)
Edit: I can provide the 6 save files I have generated, along with the annotated differences
Last edited by Nitro Edd,
