Example #1
0
 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()
Example #2
0
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)