Voila! You can now modify any data directly within the GCI file, regenerate the checksum (by selecting data from 0x44 to the end off the file), and then insert the new checksum (at 0x40). Then, select the “Selection Only” option from the Checksum tool window, and the appropriate value should be generated in the CRC-32/BZip2 row. Once saved, simply highlight the affected data in your. Then add, select the “Add Algorithm button to create an algorithm with the following settings: Simply go to View -> Tool Windows -> Checksum Overwrite the save data fro 0x44 onwards with your newly edited data (copied from hashtest.bin)Īs an alternative to Jacksum, you can actually calculate the checksum right from within Hex Editor Neo (if you’re using a different hex editor, you’ll need to follow the Jacksum directions above). Open your original GCI, overwrite with your new checksum at 0x40ĥ. hashtest.bin) CRC32_bzip2 checksum of our new data (money = 123456) is 34efd17eĤ. Calculate a new checksum of your save data using Jacksum (as shown above) by analyzing your seperate save data file (i.e. We’re gonna try changing this to 123456 (hex = 01E240).ģ. The value seems to be stored at 0x1962e (in hashtest.bin). money) and edit them In this case, my money value was previously 999999 (hex = 0F423F). Extract the save data from your GCI file (from 0x44 onwards) and save it to a seperate file (e.g. The process for making these edits should be fairly straightforwardġ. Using this knowledge, we can now edit various aspects of the save file including: Then just look at the output of the crc32_bzip2 hash and voila! It should match the previous 0x40 checksum value. This checksum is a 4-byte (32-bit) value stored at 0x40 Note: save files can be when using Dolphin emulator are located in “C:\Users\" hashtest.bin If the save data is modified and this checksum isn’t accounted for, a data corruption error will be presented when attempting to load the data. After some research, we’ve determined that the save files for A(n)WL use a checksum to verify data integrity.
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