已知某计算机指令系统中设计的堆栈指令完成将寄存器入栈和出栈指令分别是PUSH和POP, 其中SP是堆栈指针,指示栈顶在存储的位置,在入栈时SP先减1,然后将寄存器数据存入栈顶,出栈时先将数据取出到寄存器,然后SP加1。在执行如下指令之前AC=45H, R0=78H, SP=32H,存储器MEM[33H]=75H, MEM[32H]=67H, MEM[31H]=00H,则执行之后AC=( )。 POP AC
【简答题】Mr. Tom Forester lived by himself a long way from town. He hardly ever left his home, but one day he went into town to buy some things in the market. After he had bought them, he went into a restauran...
【简答题】It was a sunny day last Sunday. Tom got up at 6:30 in the morning. He had breakfast at seven fif. He ate a hot dog and drank some milk for breakfast. Then he did his homework at eight o’clock. He ...