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_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_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]
