DalsysPatcher.py

from argparse import ArgumentParser
import struct

if __name__ == "__main__":
    arg_parse = ArgumentParser()
    arg_parse.add_argument("input")
    arg_parse.add_argument("-o", "--output")
    args = arg_parse.parse_args()
    
    with open(args.input, "rb") as f:
        data = bytearray(f.read())

    name_offset = data.find(b"\\_SB_.UFS0")
    if name_offset <= 0:
        raise Exception("Failed to find \\\\_SB_.UFS0")
    
    cache_coherency_offset = name_offset - 9
    struct.pack_into("<I", data, cache_coherency_offset, 1)

    with open(args.output, "wb") as f:
        f.write(data)