# Open a binary file and modify it
bl1 = open('../S7/bl1.bin', 'rb').read()

# Modify the binary file at 1C10
bl1 = bl1[:0x1C1C] + b'\x48' + bl1[0x1C1D:]

# Write the modified binary file
open('../S7/bl1_mod.bin', 'wb').write(bl1)