Compare memory snapshots

compare_snapshots.py

from pathlib import Path

all_befores = [
    'C:/Games/Mednafen/before_1.bin',
    'C:/Games/Mednafen/before_2.bin',
    # ...
]

all_afters = [
    'C:/Games/Mednafen/after_1.bin',
    'C:/Games/Mednafen/after_2.bin',
    # ...
]

before_data = [Path(x).read_bytes() for x in all_befores]
after_data = [Path(x).read_bytes() for x in all_afters]

size = len(before_data[0])
for i in range(size):
    before_byte = before_data[0][i]
    after_byte = after_data[0][i]

    if before_byte == after_byte:
        continue

    if not all(data[i] == before_byte for data in before_data):
        continue
    
    if not all(data[i] == after_byte for data in after_data):
        continue
        
    print(
        format(i, '08x'),
        format(before_byte, '02x'),
        format(after_byte, '02x'),
    )