A quick and dirty Python 3 script to byteswap an Amiga ROM

byteswap.py

#!/usr/bin/env python3
import argparse


parser = argparse.ArgumentParser(description="Byteswap an Amiga 500 ROM file")
parser.add_argument("infile", type=str, help="the ROM file to convert")
parser.add_argument("outfile", type=str, help="filename to output")
args = parser.parse_args()

with open(args.infile, "rb") as f:
    data = f.read()

data = bytearray(data)
for i in range(0, len(data), 2):
    data[i], data[i+1] = data[i+1], data[i]

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