Computer mainframe mainly refers to the container used to place main components such as motherboard in computer hardware system. It usually includes CPU, memory, hard disk, optical drive, power supply, and other input and output controllers and interfaces, such as USB controller, graphics card, network card, sound card, etc.
CPU is a very large scale integrated circuit, which is the computing core and control core of a computer. Its function is mainly to interpret computer instructions and process data in computer software.
Memory is the bridge to communicate with CPU. All programs in a computer run in memory, so the performance of memory has a great influence on the computer. Memory, also known as memory and main memory, is used to temporarily store operation data in CPU and data exchanged with external memory such as hard disk.
The development of memory:
In the early days of computer birth, the concept of memory stick did not exist. The earliest memory is arranged on the line in the form of magnetic cores, and the bistable circuit composed of each magnetic core and transistor is used as a one-bit memory.
Each piece should be as big as a corn kernel. As you can imagine, a computer room can only hold no more than 100 kilobytes. Later, the integrated memory stick welded on the motherboard appeared, which provided direct support for computer operation in the form of memory stick.
At that time, the capacity of memory chips was extremely small, and the most common ones were 256K× 1bit and 1M×4bit. Even so, it was more than enough for the computing task at that time.