def op_8xyE(self):
# print("8xyE")
x = get_x(self.opcode)
y = get_y(self.opcode)
self.register[15] = (self.register[x] >> 7) & 0x01
self.register[x] *= 2
if self.register[x] > 255:
self.register[x] = self.register[x] & 0xFF
def op_8xy7(self):
# print("8xy7")
x = get_x(self.opcode)
y = get_y(self.opcode)
if self.register[y] > self.register[x]:
self.register[15] = 1
else:
self.register[15] = 0
self.register[x] = (self.register[y] - self.register[x]) & 0xFF
def op_8xy4(self):
# print("8xy4")
x = get_x(self.opcode)
y = get_y(self.opcode)
self.register[x] = self.register[y] + self.register[x]
if self.register[x] > 255:
self.register[x] = self.register[x] & 0xFF
self.register[15] = 1
elif self.register[x] <= 255:
self.register[15] = 0
def op_Dxyn(self):
# print("Dxyn")
x = get_x(self.opcode)
y = get_y(self.opcode)
n = get_n(self.opcode)
drawable_chunk = self.get_binary_array(n)
for y_index, row in enumerate(drawable_chunk):
for x_index, pixel_bit in enumerate(row):
current_y, current_x = self.get_coordinates(
y, y_index, x, x_index)
self.draw_pixel_to_array(pixel_bit, current_y, current_x)
def op_Fx0A(self):
# print("Fx0A")
x = get_x(self.opcode)
not_pressed = True
while not_pressed:
for event in pygame.event.get():
self.system_relevant_keypress(event)
self.game_keydown(event)
self.game_keyup(event)
for index, key in enumerate(self.keyboard_register):
if key:
self.register[x] = index
not_pressed = False
break
def op_Fx07(self):
# print("Fx07")
x = get_x(self.opcode)
self.register[x] = self.delay_timer
def op_ExA1(self):
x = get_x(self.opcode)
# print("ExA1", f"x={x}", f"register[{x}]={self.register[x]}")
if not self.keyboard_register[self.register[x]]:
self.pc += 2
def op_Cxkk(self):
# print("Cxkk")
x = get_x(self.opcode)
kk = get_kk(self.opcode)
rand = randint(0, 255)
self.register[x] = kk & rand
def op_4xkk(self):
# print("4xkk")
x = get_x(self.opcode)
kk = get_kk(self.opcode)
if self.register[x] != kk:
self.pc += 2
def op_7xkk(self):
# print("7xkk")
x = get_x(self.opcode)
kk = get_kk(self.opcode)
self.register[x] = (kk + self.register[x]) & 0xFF
def op_Fx1E(self):
# print("Fx1E")
x = get_x(self.opcode)
self.I_register += self.register[x]
def op_8xy6(self):
# print("8xy6")
x = get_x(self.opcode)
y = get_y(self.opcode)
self.register[15] = self.register[x] & 0x01
self.register[x] = self.register[x] >> 1
def op_8xy3(self):
# print("8xy3")
x = get_x(self.opcode)
y = get_y(self.opcode)
self.register[x] = self.register[x] ^ self.register[y]
def op_8xy2(self):
# print("8xy2")
x = get_x(self.opcode)
y = get_y(self.opcode)
self.register[x] = self.register[x] & self.register[y]
def op_8xy1(self):
# print("8xy1")
x = get_x(self.opcode)
y = get_y(self.opcode)
self.register[x] = self.register[x] | self.register[y]
def op_Fx15(self):
# print("Fx15")
x = get_x(self.opcode)
self.delay_timer = self.register[x]
def op_Fx33(self):
# print("Fx33")
x = get_x(self.opcode)
bcd_repr = self.get_binary_decimal(x)
for index, number in enumerate(bcd_repr):
self.memory[self.I_register + index] = number
def op_Fx18(self):
# print("Fx18")
x = get_x(self.opcode)
self.music_timer = self.register[x]
def op_6xkk(self):
x = get_x(self.opcode)
kk = get_kk(self.opcode)
# print("6xkk", f"x={hex(x)}", f"kk={hex(kk)}")
self.register[x] = kk
def op_Fx29(self):
# print("Fx29")
x = get_x(self.opcode)
self.I_register = self.register[x] * 5
def op_9xy0(self):
# print("9xy0")
x = get_x(self.opcode)
y = get_y(self.opcode)
if self.register[x] != self.register[y]:
self.pc += 2
def op_Fx65(self):
# print("Fx65")
x = get_x(self.opcode)
for index in range(0, x + 1):
self.register[index] = self.memory[self.I_register + index]
def op_3xkk(self):
x = get_x(self.opcode)
kk = get_kk(self.opcode)
# print("3xkk", f"x={hex(x)}", f"kk={hex(kk)}")
if self.register[x] == kk:
self.pc += 2
