From the computer system structure, we can see that the computer system includes the hardware system and software system. The hardware system is the foundation of the computer, and the software system is the upper-layer building of the computer. A complete computer system must contain hardware systems and software systems. Only bare metal machines that have no software system are called hardware systems. Hardware systems generally include: microprocessor (CPU), internal storage, input/output interfaces, system bus, and external devices. Among them, the signal transmission between parts must be completed through the system bus. System Bus cpu1, microprocessor (CPU) CPU is the heart of the computer system, the rapid development of computers, especially micro-computers, is essentially the process of CPU from low to advanced, from simple to one-way complex development. CPU (Central Processing Unit) is also called a central processor. Its main function is to perform operations and logical operations. The internal structure can be divided into control units, arithmetic logical units, and storage units. According to the word length of the processing information, it can be divided into: Eight-bit microprocessor, sixteen-bit microprocessor, thirty-two microprocessor and sixty-fourteen-bit microprocessor. Mainstream CPUs are provided by AMD and Intel. Such as amd athlon64 X2 5000 + AM2 and Intel Core 2 Duo e7200. 2. In-memory and auxiliary memory, memory is generally referred to as memory. In short, secondary storage refers to hard disks and optical drives. Memory 3, input/output interface I/O interface ide interface, is generally used to connect the hard disk and optical drive, this interface is gradually replaced by the SATA interface; the SCSI interface is mainly used as a hard disk to connect to the SCSI interface. the USB interface is a universal Universal Plug-in that supports hot swapping. the IEEE 1394 Interface provides a higher speed than the USB interface and supports hot swapping. The AGP interface is mainly used to connect to the video card, but with the development of technology, it is gradually replaced by the PCI-E interface. 4. There are two types of system bus: one is the bus that connects various modules in the computer, such as the bus that connects the CPU, memory, and I/O interfaces, commonly used ISA bus, eisa bus, PCI bus, and so on; another class is the system or the system and the external device connection bus, commonly used EIA-RS232C serial bus and IEEE-488 parallel bus. Keyboard 5. external devices generally include the keyboard, mouse, display, and printer. Software System software systems include: system software and application software 1, system software Windows series, Linux series and other system software including: Operating System, service-type program, language processing program. 2. Application Software applications include: customized application software and general application software.
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Computer Principle System Structure
