Soft test-Computer Architecture

The time for the soft exam to enter the countdown is also the time for us to return to the warehouse.

I still remember the first time I read the soft exam, the knowledge of computer architecture was a good thing, now I feel more cordial when I read the book again, because I am familiar with it.

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Start with a macro perspective and think about the computer architecture. What do you think? When it comes to something that makes up a computer, such as a familiar CPU, keyboard, mouse, or hard disk, we divide the computer hardware into four categories: CPU, memory, I/O devices, and memory. Of course, with these hardware, the computer still cannot work. To make it run, the command system is indispensable. The CPU is the brain of the computer, to control the coordination and operation of the entire computer system.

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I. CPU Composition

This part mainly describes the components of the CPU and the coordination operation. To understand this, you need to understand what each part of the CPU is doing. I will not go into details about this part of the book. Below are some parts that are easy to miss.

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Take the specified stage: before the program starts execution, send the starting address of the program to the program Technician (PC), read the instruction according to the address, and load it into the instruction register (IR ), program counter (PC) plus 1, save the next command to be executed. The operation code in the instruction register (IR) is decoded and the instruction is recognized by the CPU.

Execution phase: the CPU sends a control signal. Based on the address code in the instruction, it finds the original register and the target register in the General Register, and then sends the control signal to the arithmetic logic unit (ALU ), after the ALU processes the network data, it saves the processed data to the target register.

Soft test-Computer Architecture