def test_load():
cart = Cartridge('nestest.nes')
assert cart.mapper_id == 0
assert cart.prg_banks == 1
assert cart.chr_banks == 1
assert len(cart.prg_memory) == 16384
assert len(cart.chr_memory) == 8192
def __init__(self, bootrom, rom, skip_bootrom=False):
self.timer = Timer()
self.ppu = PPU()
self.apu = APU()
self.joypad = Joypad()
self.cartridge = Cartridge(rom)
self.mmu = MMU(bootrom, self.cartridge, self.timer, self.ppu, self.apu,
self.joypad)
self.timer.mmu = self.mmu
self.ppu.mmu = self.mmu
self.joypad.mmu = self.mmu
self.cpu = CPU(self.mmu)
self.t_cycles = 0
self.reset(skip_bootrom)
def __init__(self, fname):
self.cart = Cartridge(fname)
self.mem = Memory()
self.display = Display()
self.cpu = CPU()
# initial values for cpu
self.cpu.set(PC=0x100,
SP=0xFFFE,
AF=0x01B1,
BC=0x0013,
DE=0x00D8,
HL=0x014D)
# set rom banking mode
self.mem.set_rom_bank_mode(self.cart.get_rom_bank_mode_byte())
def __init__(self):
# self.rom = "../data/loz.gb"
# self.rom = "../data/test/individual/09-op r,r.gb"
self.rom = "../test/simple-rom/simple.gb"
self._cartridge = Cartridge(self.rom)
self._codes = OpcodeParser()
self._codes.load_instructions("./dat/opcodes.json")
self._screen = Screen()
self._mem = mbc1.MBC1(self._cartridge, self._screen)
self._cpu = CPU(self._cartridge, self._mem, self._codes, self._screen)
self._screen.set_cpu(self._cpu)
self._cpu.run()
def on_init(self):
pygame.init()
self._display_surf = pygame.display.set_mode(
self.size, pygame.HWSURFACE | pygame.DOUBLEBUF, 8)
# Set NES color palette.
self._display_surf.set_palette([(0x75, 0x75, 0x75), (0x27, 0x1b, 0x8f),
(0x00, 0x00, 0xab), (0x47, 0x00, 0x9f),
(0x8f, 0x00, 0x77), (0xab, 0x00, 0x13),
(0xa7, 0x00, 0x00), (0x7f, 0x0b, 0x00),
(0x43, 0x2f, 0x00), (0x00, 0x47, 0x00),
(0x00, 0x51, 0x00), (0x00, 0x3f, 0x17),
(0x1b, 0x3f, 0x5f), (0x00, 0x00, 0x00),
(0x00, 0x00, 0x00), (0x00, 0x00, 0x00),
(0xbc, 0xbc, 0xbc), (0x00, 0x73, 0xef),
(0x23, 0x3b, 0xef), (0x83, 0x00, 0xf3),
(0xbf, 0x00, 0xbf), (0xe7, 0x00, 0x5b),
(0xdb, 0x2b, 0x00), (0xcb, 0x4f, 0x0f),
(0x8b, 0x73, 0x00), (0x00, 0x97, 0x00),
(0x00, 0xab, 0x00), (0x00, 0x93, 0x3b),
(0x00, 0x83, 0x8b), (0x00, 0x00, 0x00),
(0x00, 0x00, 0x00), (0x00, 0x00, 0x00),
(0xff, 0xff, 0xff), (0x3f, 0xbf, 0xff),
(0x5f, 0x97, 0xff), (0xa7, 0x8b, 0xfd),
(0xf7, 0x7b, 0xff), (0xff, 0x77, 0xb7),
(0xff, 0x77, 0x63), (0xff, 0x9b, 0x3b),
(0xf3, 0xbf, 0x3f), (0x83, 0xd3, 0x13),
(0x4f, 0xdf, 0x4b), (0x58, 0xf8, 0x98),
(0x00, 0xeb, 0xdb), (0x00, 0x00, 0x00),
(0x00, 0x00, 0x00), (0x00, 0x00, 0x00),
(0xff, 0xff, 0xff), (0xab, 0xe7, 0xff),
(0xc7, 0xd7, 0xff), (0xd7, 0xcb, 0xff),
(0xff, 0xc7, 0xff), (0xff, 0xc7, 0xdb),
(0xff, 0xbf, 0xb3), (0xff, 0xdb, 0xab),
(0xff, 0xe7, 0xa3), (0xe3, 0xff, 0xa3),
(0xab, 0xf3, 0xbf), (0xb3, 0xff, 0xcf),
(0x9f, 0xff, 0xf3), (0x00, 0x00, 0x00),
(0x00, 0x00, 0x00),
(0x00, 0x00, 0x00)])
self._running = True
self.cartridge = Cartridge("../../test/ff.nes")
self.ppu = Ppu(self._display_surf)
self.papu = Papu()
self.cpu = Cpu(self.ppu, self.papu, self.cartridge,
KeyboardController(self._display_surf))
self.cpu.power_on()
def main():
opt = parse_command_line_args()
if opt.disassemble is not None:
if opt.disassemble == "boot":
opt.disassemble = opt.boot_rom
binary = load_binary(opt.disassemble)
print("Disassembly of %s\n" % os.path.relpath(opt.disassemble))
disassemble(binary, opt.start_address)
sys.exit(0)
if opt.cartridge is not None:
log("Loading boot ROM from %s" % os.path.relpath(opt.boot_rom))
boot = load_binary(opt.boot_rom)
log("Loading cartridge from %s" % os.path.relpath(opt.cartridge))
binary = load_binary(opt.cartridge)
cartridge = Cartridge(binary)
log(cartridge)
log("Booting Gameboy")
gameboy = Gameboy(cartridge,
boot,
no_display=opt.no_display,
zoom=opt.zoom)
if opt.skip_boot:
set_boot(gameboy)
gameboy.memory.boot_rom_active = False
if opt.debug:
Debugger(gameboy).run()
sys.exit(0)
else:
try:
gameboy.cpu.run()
except EmulatorError as e:
log("\n** Exception: %s" % str(e).strip())
Debugger(gameboy).run()
except Exception as e:
log("\n** Exception: %s" % str(e).strip())
gameboy.cpu.print_registers()
log("")
raise
def test_nesttest(expected):
nes = Bus()
cart = Cartridge('nestest.nes')
nes.insert_cartridge(cart)
nes.cpu_write(0xFFFC, 0x00)
nes.reset()
assert nes.cpu_read(0xFFFC) == 0x00
assert nes.cpu_read(0xFFFd) == 0xC0
while True:
nes.clock()
if nes.cpu.complete():
break
mock_cpu = CPU(nes)
results = {}
cycle_errors = 0
test_line_count = len(expected)
print(f'\n### Nestest lines={test_line_count} ###')
for index, expected_line in enumerate(expected):
mock_cpu.reset()
pc = nes.cpu.state.pc
a = nes.cpu.state.a & 0xFF
x = nes.cpu.state.x
y = nes.cpu.state.y
p = nes.cpu.state.status
sp = nes.cpu.state.stkp
cycle_count = nes.cpu.state.clock_count
ppu_cycle = nes.ppu._cycle
ppu_scanline = nes.ppu._scanline
opcode = nes.cpu.cpu_read(pc)
mock_cpu.state.pc += 1
instruction = nes.cpu.OPCODES[opcode]
instruction.addr_mode(mock_cpu)
address = create_address_line(nes, mock_cpu, instruction)
op_name = f'{instruction.name} {address}'
op_bytes = f'{opcode:02X}'
for data in mock_cpu.fetches:
op_bytes += f' {data:02X}'
ns = '*' if instruction.is_non_standard else ' '
result = (f'{pc:04X} {op_bytes:<9}{ns}{op_name:<32}A:{a:02X} '
f'X:{x:02X} Y:{y:02X} P:{p:02X} SP:{sp:02X} '
f'PPU:{ppu_scanline:>3},{ppu_cycle:>3} CYC:{cycle_count}')
results[index] = result
if not result[:78] == expected_line[:78]:
print_context(results, index, expected_line, 25)
mock_cpu.state.print_flags()
if result[78:] != expected_line[78:]:
cycle_errors += 1
error_msg = f'Line {index + 1} did not match the expected result!'
assert result[:78] == expected_line[:78], error_msg
# assert result == expected_line # strict (includes cycles, scanline and clock)
try:
clock(nes)
except TypeError:
msg = f'Operator {instruction.operate.__name__} not implemented!'
print(red(msg))
print_context(results, index, expected_line)
raise UserWarning(msg)
error_1 = nes.cpu_read(0x0002)
error_2 = nes.cpu_read(0x0003)
msg = f'Error codes: 0x02 = 0x{error_1:02X} 0x03 = 0x{error_2:02X} (nestest.txt)'
assert error_1 == 0x00 and error_2 == 0x00, msg
print(f'Total number of cycle errors: {cycle_errors}')
import time
from bus import Bus
from cartridge import Cartridge
if __name__ == '__main__':
nes = Bus()
# cart = Cartridge('tests/nestest.nes')
cart = Cartridge('roms/donkeykong.nes')
# cart = Cartridge('roms/smb.nes')
# cart = Cartridge('roms/ducktales.nes')
nes.insert_cartridge(cart)
nes.reset()
frame_count = 20
now = time.time()
while True:
nes.clock()
if nes.ppu.frame_count == frame_count:
break
diff = time.time() - now
print('------------')
print(f'Ran for {frame_count} frames.')
print(f'Running time: {diff:.{2}f} seconds')
print(f'Frames per second: {frame_count / diff:.{3}f} FPS')
print(f'Quality (60 FPS expected): {(frame_count / diff) / 60:.{2}f}')
# Best so far:
# 2020-10-06
def load_cartridge(self, filename):
self.cartridge = Cartridge(filename)
