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decoder checks more valid rom sizes

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Wei-ju Wu
2015-05-13 13:27:46 -07:00
parent a71af9156a
commit d8e26532ec
1 changed files with 8 additions and 3 deletions
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11
utils/decode_cloanto_rom.py
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@ -5,9 +5,13 @@ Convert Cloanto ROM to normal Kickstart ROM
import argparse
CLOANTO_ID = b'AMIROMTYPE1'
SIZE_BOOTROM = 0x2000
SIZE_590 = 0x4000
SIZE_4091 = 0x8000
SIZE_CLASSIC = 0x40000
SIZE_MODERN = 0x80000
MAX_ROM_SIZE = SIZE_MODERN
ROM_SIZES = {SIZE_BOOTROM, SIZE_590, SIZE_4091, SIZE_CLASSIC, SIZE_MODERN}
def decode_cloanto(rom, key):
"""Decodes an encoded Kickstart ROM and returns a decoded ROM"""
@ -22,7 +26,8 @@ def decode_cloanto(rom, key):
key_index = (key_index + 1) % key_size
return result
if __name__ == '__main__':
parser = argparse.ArgumentParser(description="Cloanto Decoder 1.0")
parser.add_argument('romfile')
@ -38,7 +43,7 @@ if __name__ == '__main__':
if file_id == CLOANTO_ID:
data = infile.read()
size = len(data)
if size != SIZE_CLASSIC and size != SIZE_MODERN:
if size not in ROM_SIZES:
raise Exception("invalid rom size")
decoded = decode_cloanto(data, key_data)
with open(args.target, 'wb') as outfile: