How the CPU works, how does the CPU work

The CPU works with the crystal switch on and off, and the on and off is 0 (because the computer is programmed with 0 and 1) plus the CPU instruction to assist.

Dual-core processors are generally divided into two cases: 2 cores are the same, and 2 cores are different.

The working principle is mainly to extend parallel computing in a single core between multiple CPUs, as follows:

When two cores are the same, specify one of them as the primary CPU and the other as the slave CPU. The primary CPU completes task scheduling and part of the computing work, and the secondary CPU is mainly used for computing. When a task can be decomposed into two parallel tasks, with the support of the operating system or control software, one of the simple computing tasks is assigned to the slave CPU, and the other is completed by the master CPU, and the final result is summarized to the master CPU.

When the two cores are different, generally one of them is used. The Loyman structure of the CPU and a DSP that adopts the Harvard structure, in which Feng. The Loechman CPU is suitable for transaction processing, usually as the master CPU and the other as the slave CPU.

The main CPU here is generally lower in speed, while the DSP is higher, so the main CPU completes task scheduling and management, and sometimes does a small part of the computing work, and the DSP is mainly used for computing. This is extremely common in image processing. In this case, the computing task of one task is generally assigned to the slave CPU, and the rest is completed by the primary CPU, and the final result is summarized to the primary CPU.

With the support of the operating system or control software, the dual CPUs can run in parallel due to the internal high-speed broadband bus between the two cores, and the actual effect is nearly twice the speed of the single-core CPU. For example, for a complex control and calculation task, different processing programs can be programmed for two cores, which can reduce the processing difficulty on the one hand, and greatly reduce the problem of low execution efficiency when a single core on the other hand, and greatly improve the actual speed.

Work according to the plan he made, that is to say, his work is set in advance, and then work according to this.

This is still more complicated, so let's put it simply, the system software gives her the work, and then she undertakes the work, and then deals with it. After you have processed it, you can send it back to the computer.

In fact, why do they work? It's because it's running electricity, well, it's a systematic process, and it can't run without a systematic process.

Food has a very small electron tube that works by turning an electric current on and off.

How does CPU work? You have to ask the volunteers who work in the CPU, they are generally free volunteers.

The CPU is a kind of motor that runs those small software works after it is powered on.

That's how CPUs work:

1. Take the instruction: The controller of the CPU reads an instruction from the memory and puts it into the instruction register. The format of the instruction is generally like this:

The opcode is the mov, add, jmp and other symbol codes in assembly language; The operand address indicates where the operand required for the instruction is located, whether it is in memory or in the internal registers of the CPU.

2. Instruction decoding (decoding): The instruction in the instruction register is decoded to determine what kind of operation should be carried out by the instruction (that is, the opcode in the instruction), and the operand is in ** (the address of the operand).

3. Execute instructions (write back), and simply write back the results of the execution stage in a certain format. The results of the computation are often written to the scratchpad inside the CPU for quick access to subsequent instructions.

How exactly does a CPU work? Take you to understand the mystery behind this.

How it works, you can really see how it works in the manual.

How exactly does a CPU work? Take you to understand the mystery behind this.