class TestLoadStoreOperations(unittest.TestCase):
def setUp(self):
self.memory = Memory(use_bus=False)
self.cpu = CPU(self.memory)
self.memory.load(0x1000, [0x00, 0x01, 0x7F, 0x80, 0xFF])
def test_LDA(self):
self.cpu.LDA(0x1000)
self.assertEqual(self.cpu.accumulator, 0x00)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 1)
self.cpu.LDA(0x1001)
self.assertEqual(self.cpu.accumulator, 0x01)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDA(0x1002)
self.assertEqual(self.cpu.accumulator, 0x7F)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDA(0x1003)
self.assertEqual(self.cpu.accumulator, 0x80)
self.assertEqual(self.cpu.sign_flag, 1)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDA(0x1004)
self.assertEqual(self.cpu.accumulator, 0xFF)
self.assertEqual(self.cpu.sign_flag, 1)
self.assertEqual(self.cpu.zero_flag, 0)
def test_LDX(self):
self.cpu.LDX(0x1000)
self.assertEqual(self.cpu.x_index, 0x00)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 1)
self.cpu.LDX(0x1001)
self.assertEqual(self.cpu.x_index, 0x01)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDX(0x1002)
self.assertEqual(self.cpu.x_index, 0x7F)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDX(0x1003)
self.assertEqual(self.cpu.x_index, 0x80)
self.assertEqual(self.cpu.sign_flag, 1)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDX(0x1004)
self.assertEqual(self.cpu.x_index, 0xFF)
self.assertEqual(self.cpu.sign_flag, 1)
self.assertEqual(self.cpu.zero_flag, 0)
def test_LDY(self):
self.cpu.LDY(0x1000)
self.assertEqual(self.cpu.y_index, 0x00)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 1)
self.cpu.LDY(0x1001)
self.assertEqual(self.cpu.y_index, 0x01)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDY(0x1002)
self.assertEqual(self.cpu.y_index, 0x7F)
self.assertEqual(self.cpu.sign_flag, 0)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDY(0x1003)
self.assertEqual(self.cpu.y_index, 0x80)
self.assertEqual(self.cpu.sign_flag, 1)
self.assertEqual(self.cpu.zero_flag, 0)
self.cpu.LDY(0x1004)
self.assertEqual(self.cpu.y_index, 0xFF)
self.assertEqual(self.cpu.sign_flag, 1)
self.assertEqual(self.cpu.zero_flag, 0)
def test_STA(self):
self.cpu.accumulator = 0x37
self.cpu.STA(0x2000)
self.assertEqual(self.memory.read_byte(None, 0x2000), 0x37)
def test_STX(self):
self.cpu.x_index = 0x38
self.cpu.STX(0x2000)
self.assertEqual(self.memory.read_byte(None, 0x2000), 0x38)
def test_STY(self):
self.cpu.y_index = 0x39
self.cpu.STY(0x2000)
self.assertEqual(self.memory.read_byte(None, 0x2000), 0x39)
