test case can not pass in /code/ch3.3/cpu.rs

    
seems like we need comment 3 line to pass the test.
```
pub fn reset(&mut self){
       //self.register_a = 0;
       //self.register_x = 0;
       self.register_y = 0;
       self.stack_pointer = STACK_RESET;
       self.status = CpuFlags::from_bits_truncate(0b100100);
       //self.memory = [0; 0xFFFF];

       self.program_counter = self.mem_read_u16(0xFFFC);
    }
```