As with previous generations, however, the fast I/O manipulation instructions can only reach the first 64 I/O register locations (the first 32 locations for bitwise instructions).
然而，正如前代產品一樣，快速I/O操作指令只可到達首先的64個I/O暫存器位置（首位的32個位置是給位元運算指令使用的）。