什么是16位，32位和64位体系结构? [英] What are 16, 32 and 64-bit architectures?

问题描述

在微处理器和/或操作系统的情况下，16位，32位和64位体系结构意味着什么?

What do 16-bit, 32-bit and 64-bit architectures mean in case of Microprocessors and/or Operating Systems?

对于微处理器，这是指最大大小为General Purpose Register s还是Integer大小还是Address-line s数目还是Data Bus line s数目还是什么?

In case of Microprocessors, does it mean maximum size of General Purpose Registers or size of Integer or number of Address-lines or number of Data Bus lines or what?

说"DOS is a 16-bit OS"，"Windows in a 32-bit OS"等是什么意思?

What do we mean by saying "DOS is a 16-bit OS", "Windows in a 32-bit OS", etc...?

推荐答案

区别在于传递给通用寄存器进行操作的指令集的位宽. 16位可以同时在2个字节上操作，64位可以在8个字节的指令上操作.您通常可以通过在每个时钟周期执行更密集的指令来提高处理器的吞吐量.

The difference comes down to the bit width of an instruction set passed to a general purpose register for operating on. 16 bits can operate on 2 bytes, 64 on 8 bytes of instruction at a time. You can often increase throughput of a processor by executing more dense instructions per clock cycle.

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