class GameBoy(object):
def __init__(self):
self.create_drivers()
self.create_gameboy_elements()
def create_drivers(self):
self.joypad_driver = JoypadDriver()
self.video_driver = VideoDriver()
self.sound_driver = SoundDriver()
def create_gameboy_elements(self):
self.clock = Clock()
self.ram = RAM()
self.cartridge_manager = CartridgeManager(self.clock)
self.interrupt = Interrupt()
self.cpu = CPU(self.interrupt, self)
self.serial = Serial(self.interrupt)
self.timer = Timer(self.interrupt)
self.joypad = Joypad(self.joypad_driver, self.interrupt)
self.video = Video(self.video_driver, self.interrupt, self)
#self.sound = Sound(self.sound_driver)
self.sound = BogusSound()
def get_cartridge_manager(self):
return self.cartridge_manager
def load_cartridge(self, cartridge, verify=True):
self.cartridge_manager.load(cartridge, verify)
self.cpu.set_rom(self.cartridge_manager.get_rom())
self.memory_bank_controller = self.cartridge_manager.get_memory_bank()
def load_cartridge_file(self, path, verify=True):
self.load_cartridge(CartridgeFile(path), verify)
def get_frame_skip(self):
return self.video.get_frame_skip()
def set_frame_skip(self, frameSkip):
self.video.set_frame_skip(frameSkip)
def save(self, cartridgeName):
self.cartridge_manager.save(cartridgeName)
def start(self):
self.sound.start()
def stop(self):
self.sound.stop()
def reset(self):
self.ram.reset()
self.memory_bank_controller.reset()
self.interrupt.reset()
self.cpu.reset()
self.serial.reset()
self.timer.reset()
self.joypad.reset()
self.video.reset()
self.sound.reset()
self.cpu.set_rom(self.cartridge_manager.get_rom())
self.draw_logo()
def get_cycles(self):
return min(min(min(min( self.video.get_cycles(),
self.serial.get_cycles()),
self.timer.get_cycles()),
self.sound.get_cycles()),
self.joypad.get_cycles())
def emulate(self, ticks):
while ticks > 0:
count = self.get_cycles()
self.cpu.emulate(count)
self.serial.emulate(count)
self.timer.emulate(count)
self.video.emulate(count)
self.sound.emulate(count)
self.joypad.emulate(count)
#self.print_cycles()
if count == 0:
#self.print_cycles()
return 0
ticks -= count
return 0
def emulate_step(self):
self.cpu.emulate_step()
self.serial.emulate(1)
self.timer.emulate(1)
self.video.emulate(1)
self.sound.emulate(1)
self.joypad.emulate(1)
def print_cycles(self):
return
#for element in [(" video:", self.video),
# ("serial:", self.serial),
# (" timer:", self.timer),
# (" sound:", self.sound),
# ("joypad:", self.joypad)]:
# #print " ", element[0], element[1].get_cycles()
# pass
def write(self, address, data):
receiver = self.get_receiver(address)
if receiver is not None:
receiver.write(address, data)
# else:
# raise Exception(("invalid write address given: ",address," ",data))
if address == constants.STAT or address == 0xFFFF:
self.cpu.handle_pending_interrupts()
def read(self, address):
receiver = self.get_receiver(address)
if receiver is None:
# raise Exception("invalid read address given: ", address)
return 0xFF
return receiver.read(address)
def print_receiver_msg(self, address, name):
#print " recei: ", hex(address), name
pass
def get_receiver(self, address):
"""
General Memory Map
0000-3FFF 16KB ROM Bank 00 (in cartridge, fixed at bank 00)
4000-7FFF 16KB ROM Bank 01..NN (in cartridge, switchable bank number)
8000-9FFF 8KB Video RAM (VRAM)
A000-BFFF 8KB External RAM (in cartridge, switchable bank, if any)
C000-CFFF 4KB Work RAM Bank 0 (WRAM)
D000-DFFF 4KB Work RAM Bank 1 (WRAM)
E000-FDFF Same as C000-DDFF (ECHO) (typically not used)
FE00-FE9F Sprite Attribute Table (OAM)
FEA0-FEFF Not Usable
FF00-FF7F I/O Ports
FF80-FFFE High RAM (HRAM)
FFFF Interrupt Enable Register
"""
if 0x0000 <= address <= 0x7FFF:
self.print_receiver_msg(address, "memoryBank")
return self.cartridge_manager.get_memory_bank()
elif 0x8000 <= address <= 0x9FFF:
self.print_receiver_msg(address, "video")
return self.video
elif 0xA000 <= address <= 0xBFFF:
self.print_receiver_msg(address, "memoryBank")
return self.cartridge_manager.get_memory_bank()
elif 0xC000 <= address <= 0xFDFF:
self.print_receiver_msg(address, "ram")
return self.ram
elif 0xFE00 <= address <= 0xFEFF:
self.print_receiver_msg(address, "video")
return self.video
elif address == 0xFF00:
self.print_receiver_msg(address, "joypad")
return self.joypad
elif 0xFF01 <= address <= 0xFF02:
self.print_receiver_msg(address, "serial")
return self.serial
elif 0xFF04 <= address <= 0xFF07:
self.print_receiver_msg(address, "timer")
return self.timer
elif address == 0xFF0F:
self.print_receiver_msg(address, "interrupt")
return self.interrupt
elif 0xFF10 <= address <= 0xFF3F:
self.print_receiver_msg(address, "sound")
return self.sound
elif 0xFF40 <= address <= 0xFF4B:
self.print_receiver_msg(address, "video")
return self.video
elif 0xFF80 <= address <= 0xFFFE:
self.print_receiver_msg(address, "ram")
return self.ram
elif address == 0xFFFF:
self.print_receiver_msg(address, "interrupt")
return self.interrupt
def draw_logo(self):
for index in range(0, 48):
bits = self.memory_bank_controller.read(0x0104 + index)
pattern0 = ((bits >> 0) & 0x80) + ((bits >> 1) & 0x60) + \
((bits >> 2) & 0x18) + ((bits >> 3) & 0x06) + \
((bits >> 4) & 0x01)
pattern1 = ((bits << 4) & 0x80) + ((bits << 3) & 0x60) + \
((bits << 2) & 0x18) + ((bits << 1) & 0x06) + \
((bits << 0) & 0x01)
self.video.write(0x8010 + (index << 3), pattern0)
self.video.write(0x8012 + (index << 3), pattern0)
self.video.write(0x8014 + (index << 3), pattern1)
self.video.write(0x8016 + (index << 3), pattern1)
for index in range(0, 8):
self.video.write(0x8190 + (index << 1), \
constants.REGISTERED_BITMAP[index])
for tile in range(0, 12):
self.video.write(0x9904 + tile, tile + 1)
self.video.write(0x9924 + tile, tile + 13)
self.video.write(0x9904 + 12, 25)
def emulate(self, ticks):
self.reset_emulate_tracking_fields()
Video.emulate(self, ticks)