def testSetVXToSubtractionOfVXFromVYWithCarry(self):
cpu = chip8()
cpu.registers[0xA] = 0xF
cpu.registers[0xE] = 0xA
cpu.executeInstruction(0x8AE7)
self.assertEqual(cpu.registers[0xA], 0xFA)
self.assertEqual(cpu.registers[0xF], 0x1)
def testSetVXToVY(self):
cpu = chip8()
cpu.registers[0xA] = 0x0
cpu.registers[0xF] = 0xFA
self.assertEqual(cpu.registers[0xA], 0x0)
cpu.executeInstruction(0x8AF0)
self.assertEqual(cpu.registers[0xA], 0xFA)
def testAddVYToVXWithCarry(self):
cpu = chip8()
cpu.registers[0xA] = 0xFF
cpu.registers[0xE] = 0xFA
cpu.executeInstruction(0x8AE4)
self.assertEqual(cpu.registers[0xA], 0xFA)
self.assertEqual(cpu.registers[0xF], 0x1)
def testInstructionSkipsTheNextInstructionIfVXDoesNotEqualsNN(self):
cpu = chip8()
cpu.PC = 0
cpu.registers[0xA] = 0xFF
self.assertEqual(cpu.registers[0xA], 0xFF)
self.assertEqual(cpu.PC, 0)
cpu.executeInstruction(0x4AFF)
self.assertEqual(cpu.PC, 2)
cpu.executeInstruction(0x4AFA)
self.assertEqual(cpu.PC, 6)
def testShiftVXLeft(self):
cpu = chip8()
cpu.registers[0xA] = 0x8A
cpu.executeInstruction(0x8AEE)
self.assertEqual(cpu.registers[0xA], 0x14)
self.assertEqual(cpu.registers[0xF], 0x1)
cpu.registers[0xA] = 0x2
cpu.executeInstruction(0x8AEE)
self.assertEqual(cpu.registers[0xA], 0x4)
self.assertEqual(cpu.registers[0xF], 0x0)
def testShiftVXRight(self):
cpu = chip8()
cpu.registers[0xA] = 0x3
cpu.executeInstruction(0x8AE6)
self.assertEqual(cpu.registers[0xA], 0x1)
self.assertEqual(cpu.registers[0xF], 0x1)
cpu.registers[0xA] = 0x2
cpu.executeInstruction(0x8AE6)
self.assertEqual(cpu.registers[0xA], 0x1)
self.assertEqual(cpu.registers[0xF], 0x0)
def testSkipNextInstructionIfVXEqualsVY(self):
cpu = chip8()
cpu.PC = 0
cpu.registers[0xA] = 0xFF
self.assertEqual(cpu.registers[0xA], 0xFF)
self.assertEqual(cpu.PC, 0)
cpu.executeInstruction(0x5AF0)
self.assertEqual(cpu.PC, 2)
cpu.registers[0xF] = 0xFF
self.assertEqual(cpu.registers[0xF], 0xFF)
cpu.executeInstruction(0x5AF0)
self.assertEqual(cpu.PC, 6)
def testSetVXToVXxorVY(self):
cpu = chip8()
cpu.registers[0xA] = 0x2
cpu.registers[0xF] = 0xA
cpu.executeInstruction(0x8AF3)
self.assertEqual(cpu.registers[0xA], 0x8)
def testSetVXToVXandVY(self):
cpu = chip8()
cpu.registers[0xA] = 0x7
cpu.registers[0xF] = 0x3
cpu.executeInstruction(0x8AF2)
self.assertEqual(cpu.registers[0xA], 0x3)
def testAddValueToVX(self):
cpu = chip8()
cpu.registers[0xA] = 0x5
self.assertEqual(cpu.registers[0xA], 0x5)
cpu.executeInstruction(0x7A05)
self.assertEqual(cpu.registers[0xA], 0xA)
def testSetValueToVX(self):
cpu = chip8()
cpu.registers[0xA] = 0x0
self.assertEqual(cpu.registers[0xA], 0x0)
cpu.executeInstruction(0x6AFA)
self.assertEqual(cpu.registers[0xA], 0xFA)
def testInstructionJumpTo(self):
cpu = chip8()
cpu.PC = 0
cpu.executeInstruction(0x1FFF)
self.assertEqual(cpu.PC, 0x0FFF)
def main():
emulator=chip8()
emulator.load_rom('/home/misha/Desktop/chip8/PONG2')
emulator.run_cycle()