def __init__(self, bytes):
self.load_address = 0
self.bank = 0
self.disk_block = 0
self.diskname = ''
self.filename = ''
self.code_offset = 0
self.code_address = 0
self.code = ''
self.is_valid = bytes.startswith('CBM')
if self.is_valid:
s = ByteStream(bytes[3:])
self.load_address = s.word()
self.bank = s.byte()
self.disk_block = s.byte() # What?
self.diskname = s.read_until(0, keep=False)
self.filename = s.read_until(0, keep=False)
self.code_offset = s.pos
self.code_address = self.code_offset + RAM_BOOTSECTOR
self.code = s.rest()
