def test_mem_write_byte_attribute_before_char(self):
        self.mda.mem_write_byte(3999, MDA_ATTR_INTENSITY)
        self.assertEqual(self.cg.last_blit, (None, (711, 336), 0x00, MDA_BRIGHT_GREEN, MDA_BLACK))
        self.mda.mem_write_byte(3998, 0xFF)
        self.assertEqual(self.cg.last_blit, (None, (711, 336), 0xFF, MDA_BRIGHT_GREEN, MDA_BLACK))