The fourth generation. Computer stage 4 is the 32-bit microprocessor era, also known as the 4th generation. Its typical products are Intel 80386\/80486, Motorola M69030\/68040 and so on. It is characterized by the use of HMOS or CMOS process, the integration of up to 1 million transistors\/slice, with a 32-bit address line and 32-bit data bus. 6 million instructions per second. The function of the microcomputer has reached or even exceeded that of the superminicomputer, which is fully capable of multi-task and multi-user operations. At the same time, some other microprocessor manufacturers (such as AMD, etc.) also introduced 80386\/80486 series chips. Computer inventor John von Neumann. Computer is one of the most advanced scientific and technological inventions in the 20th century, which has had an extremely important impact on human production and social activities, and has developed rapidly with strong vitality. In terms of hardware, the logic components use large-scale and very large scale integrated circuits (LSI and VLSI). In terms of software, database management system, network management system and object-oriented language have appeared. In 1971, the world's first microprocessor was born in Silicon Valley, ushering in a new era of microcomputers. Application fields from scientific computing, transaction management, process control gradually to the home. Due to the development of integration technology, the integration of semiconductor chips is higher, each chip can accommodate tens of thousands or even millions of transistors, and can put the arithmetic and controller are concentrated on a chip, thus the emergence of the microprocessor, and can be assembled into a microprocessor and large-scale, ultra-large scale integrated circuits, that is, we often say microcomputer or PC. The microcomputer is small, cheap and easy to use, but its function and computing speed have reached or even exceeded the past large computers. On the other hand, the use of large-scale, ultra-large scale integrated circuits to manufacture a variety of logic chips, has been made of the volume is not very large, but the computing speed can reach 100 million or even billions of times. Following the successful development of the Galaxy-ⅰ giant computer with 100 million operations per second in 1983, China successfully developed the Galaxy-II universal parallel supercomputer with 1 billion operations per second in 1993. This period also produced a new generation of programming languages as well as database management systems and network software. With the change of physical elements and devices, not only the computer host has undergone upgrading, but its external equipment is also constantly changing. For example, external memory, from the initial cathode-ray display tube to the development of magnetic core, magnetic drum, and later developed into a general purpose disk, and now there is a smaller volume, larger capacity, faster read-only disc (CD-ROM).
The microcomputer belongs to the fourth generation computer.
Microcomputer referred to as \"microcomputer\