In fact, the largest length available for a memory address to any instruction format is only 24 bits!
实际上，内存地址对于任何指令格式可以使用的最大长度只有24位！
2
The lengthinstruction determines the length of the string and loads it into an integer register.
length指令确定字符串的长度并将其加载到一个整数寄存器中。
3
Because of the nature of memory systems and instruction-set designs, the best generic routine to copy memory is rarely as fast as code written to copy a particular length.