def __init__(self, cfg, cpu, memory, user_input_queue):
self.cfg = cfg
self.cpu = cpu
self.memory = memory
self.user_input_queue = user_input_queue
self.kbd = 0xBF
self.display = None
self.speaker = None # Speaker()
self.cassette = None # Cassette()
self.sam = SAM(cfg, cpu, memory)
self.pia = PIA(cfg, cpu, memory, self.user_input_queue)
self.memory.add_read_byte_callback(self.no_dos_rom, 0xC000)
self.memory.add_read_word_callback(self.no_dos_rom, 0xC000)
self.running = True
