def test_TAY():
cpu = CPU()
memory = Memory()
cpu.y = 1
cpu.a = 2
TAY = OpCodes.all[168]
TAY.exec(cpu, memory)
assert cpu.y == 2
assert cpu.zero == False
assert cpu.negative == False
cpu.a = 0
cpu.y = 1
cpu.inc_cycle_by(-cpu.cycle)
TAY.exec(cpu, memory)
assert cpu.cycle == (TAY.cycles - 1)
assert cpu.y == 0
assert cpu.zero == True
assert cpu.negative == False
cpu.a = 0b10000001
cpu.y = 1
TAY.exec(cpu, memory)
assert cpu.y == 0b10000001
assert cpu.zero == False
print(cpu.negative)
assert cpu.negative == True
def test_TYA():
cpu = CPU()
memory = Memory()
cpu.a = 1
cpu.y = 2
TYA = OpCodes.all[152]
TYA.exec(cpu, memory)
assert cpu.a == 2
assert cpu.zero == False
assert cpu.negative == False
cpu.y = 0
cpu.a = 1
cpu.inc_cycle_by(-cpu.cycle)
TYA.exec(cpu, memory)
assert cpu.cycle == (TYA.cycles - 1)
assert cpu.a == 0
assert cpu.zero == True
assert cpu.negative == False
cpu.y = 0b10000001
cpu.a = 1
TYA.exec(cpu, memory)
assert cpu.a == 0b10000001
assert cpu.zero == False
print(cpu.negative)
assert cpu.negative == True
def test_read_Accumulator():
address_mode = Accumulator
cpu = CPU()
memory = Memory()
cpu.a = 0x00
cpu.inc_cycle_by(-cpu.cycle)
address = address_mode.fetch_address(cpu, memory)
value = address_mode.read_from(cpu, memory, address)
assert address is None
assert value == 0x00
cpu.inc_cycle_by(-cpu.cycle)
cpu.inc_pc_by(-cpu.pc)
cpu.inc_pc_by(MemoryPositions.PRG_ROM_START.start)
cpu.a = 0x10
address = address_mode.fetch_address(cpu, memory)
value = address_mode.read_from(cpu, memory, address)
assert address is None
assert value == 0x10
cpu.inc_cycle_by(-cpu.cycle)
cpu.inc_pc_by(-cpu.pc)
cpu.inc_pc_by(MemoryPositions.PRG_ROM_START.start)
cpu.a = 0xFF
address = address_mode.fetch_address(cpu, memory)
value = address_mode.read_from(cpu, memory, address)
assert address is None
assert value == 0xFF
def test_read_Accumulator():
address_mode = Accumulator
cpu = CPU()
memory = Memory()
cpu.inc_cycle_by(-cpu.cycle)
address = address_mode.fetch_address(cpu, memory)
address_mode.write_to(cpu, memory, address, 5)
assert address is None
assert cpu.a == 5
cpu.inc_cycle_by(-cpu.cycle)
cpu.inc_pc_by(-cpu.pc)
cpu.inc_pc_by(MemoryPositions.PRG_ROM_START.start)
cpu.a = 0x10
address = address_mode.fetch_address(cpu, memory)
address_mode.write_to(cpu, memory, address, 105)
assert address is None
assert cpu.a == 105
cpu.inc_cycle_by(-cpu.cycle)
cpu.inc_pc_by(-cpu.pc)
cpu.inc_pc_by(MemoryPositions.PRG_ROM_START.start)
cpu.a = 0xFF
address = address_mode.fetch_address(cpu, memory)
address_mode.write_to(cpu, memory, address, 255)
assert address is None
assert cpu.a == 255
def test_ROR_accumulator():
instruction = OpCodes.all[0x6A]
cpu = CPU()
memory = Memory()
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b00000000
cpu.carry = False
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b00000000
assert cpu.zero == True
assert cpu.carry == False
assert cpu.negative == False
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b00000001
cpu.carry = False
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b00000000
assert cpu.zero == True
assert cpu.carry == True
assert cpu.negative == False
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b01000000
cpu.carry = False
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b00100000
assert cpu.zero == False
assert cpu.carry == False
assert cpu.negative == False
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b10000000
cpu.carry = False
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b01000000
assert cpu.zero == False
assert cpu.carry == False
assert cpu.negative == False
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b00000000
cpu.carry = True
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b10000000
assert cpu.zero == False
assert cpu.carry == False
assert cpu.negative == True
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b00000010
cpu.carry = True
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b10000001
assert cpu.zero == False
assert cpu.carry == False
assert cpu.negative == True
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b01000000
cpu.carry = True
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b10100000
assert cpu.zero == False
assert cpu.carry == False
assert cpu.negative == True
cpu.inc_cycle_by(-cpu.cycle)
cpu.a = 0b00000001
cpu.carry = True
instruction.exec(cpu, memory)
assert cpu.cycle == (instruction.cycles - 1)
assert cpu.a == 0b10000000
assert cpu.zero == False
assert cpu.carry == True
assert cpu.negative == True
