第5章讨论指针和地址运算。
双点运算符调用了mutator方法来设置每个地址属性的值。
The double-dot operator invokes mutator methods to set values for each of the address attributes.
这些指令的特点是我们必须定义alu操作数和ALE(地址锁存允许)运算,除了两个例外:乘法和除法。
Main characteristic of these instructions is that we have to define both ALU operands and ALE operation. Exceptions among these instructions are mul (multiply) instruction div (divide) instruction.
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