Siheyuan: Starting from a fitter

Chapter 142 Dawn 101 Computer
When he went to work the next day, Li Guocheng sat at his workstation and thought about how to implement scientific calculations.

When I heard the demand, what immediately came to mind was the scientific calculator of later generations.But later generations of calculators were made with microcontrollers and liquid crystal displays, and the current technology is not available.

A dedicated chip is actually easy, just a set of multipliers and registers, but how to display it, whether it is a light-emitting diode or an LCD screen, requires a lot of time and research.

Light-emitting diodes are not based on single crystal silicon, but are prepared with potassium phosphide or gallium arsenide as the base material. Now there is no time and energy to invest. The most realistic method is to use CRT monitors, which are the kind of big-ass monitors.

Thinking of this, Li Guocheng decided to make a simple calculator first, consisting of a special chip, a display and an input keyboard.The dedicated chip can be put together with the input keyboard, similar to the simple scientific calculator of later generations, only addition, subtraction, multiplication and division, square root and power calculation, and only the display part is replaced by a CRT display.

It took Li Guocheng less than an hour to hand-draw the structure diagram of the calculator, as well as the specific parameters. He found Wu Liankui and asked him to ask someone in the ministry. The requirement was a technician who understood TV monitors.

Then Li Guocheng started the design of a special chip, and finally used a total of more than 2300 NMOS tubes and a three-layer mask to complete the design.

This is the first time that Li Guocheng has used a multi-layer mask for chip design, and the number of NMOS tubes directly exceeded a thousand.

The total time taken is more than 2 months.If you don't have the power to simulate the simulation in your mind, it would take 1 or 2 years to draw it by hand alone.I didn't expect that the mutated mental power would be such a big help in chip development.

Li Guocheng's mind is like having AD, EDA and CAD software installed, and it has a three-dimensional full-angle view that can be zoomed in and out.

He also sometimes thinks that his soul wear only strengthens his mental strength, that is, he does not give himself a farm to solve the food problem of the people around him, nor does he provide the conditions for him to continue cultivating immortality, so that he can punch the whole world.Could it be that the mission given to him is to develop chips.

After just soul penetration, the chalcedony liquid in the secret realm is only enough to strengthen the body and stimulate mental power to generate thoughts.Then I happened to encounter the eight methods of carving. When you are bored with carving, it is very easy to enter a state of enlightenment. After that, your mental power will continue to change until it reaches the subtlety.

No matter how you think about it, I think it is paving the way for chip development and manufacturing.Forget it, I don’t dare to think about it.

Just a week after Wu Liankui's application was submitted, the ministry sent two people, an old engineer in his 40s who had been studying TV monitors and had a very domineering name, Hou Zhenhua.The other is his apprentice, 25 years old, named Hu Bing.

At the beginning, when he heard that his team leader was a junior high school student, maybe he had experienced too much beating in society, so he maintained a calm face, but the disdain hidden in his eyes could be seen without perception.

His disciple obviously lacked training, and his face showed dissatisfaction and disdain.Li Guocheng didn't care. He would have behaved like this himself, and maybe not as good as them.

Everything depends on strength. When Li Guocheng explained the principle and display requirements of the calculator, both of them were obviously stunned. When Li Guocheng explained the principle of the display tube and the direction of improvement, they were completely convinced.

Now the black-and-white display technology, when the principle of color display was proposed, the two of them even called teachers, full of infinite expectations and desires for the research of displays.

With Li Guocheng's help from time to time, the basic principles of the display have now been figured out, and the next step is to implement it.During the process, the winding of the high-voltage wire package was always not up to standard. Li Guocheng solved the problem by designing and winding it himself, and compiled a complete production process.

This time it was designed for mass production, so at the beginning, Li Guocheng did not consider engraving the shell and buttons, but directly designed a mold in his mind. After pouring it from aluminum alloy, Li Guocheng personally fine-tuned and polished it.

Zhang Zhijing and Zhou Xiaojuan were responsible for the specific color matching of the plastic.

After rechecking the mask, Li Guocheng personally made the first version of the chip.The process was relatively smooth, and all 18 finished chips passed the test.

Half a month later, the display and keyboard samples were completed and connected to the power supply. A calculator that looked very much like a later desktop computer appeared in front of everyone.There is no mouse or standard keyboard, only a black plastic small keyboard connected to the sheet metal chassis, and the circuit board for the special chip is placed in the chassis.

Because of the use of CRT monitors, the battery could not meet the power demand. Li Guocheng specially designed an AC/DC power supply with 400W. It is now a large horse-drawn cart, which is also prepared for real computers in the future.

When considering the overall design, Li Guocheng finally referred to the structure of later generations of desktop computers. Anyway, there are no such chassis structures in the world. This kind of chassis structure will become the Chinese standard in the future.

The dedicated chip is named "Kaitian 101 Processor", and the calculator is named "Shuguang 101 Computer", implying a gift to the National Day.

A total of 5 prototypes were produced and tested within the laboratory for 10 days, and none of them had problems.In order to verify the correctness of the calculations, all financial officers of the steel rolling mill participated in the 10-day test, and 22 financial officers held abacuses to continuously check the calculations.

This is a scientific calculation, and 4 digits must be retained after the decimal point. Integers can calculate 12 digits of data.Square roots and power operations are all involved in the technical department.

These 10 days were almost a closed test. Although Li Huaide prepared delicious meals for everyone, and the meals were full of success, after 10 days, everyone who participated seemed to be seriously ill.

Li Guocheng participated in the whole process and checked the calculations throughout. With the blessing of mind power, it was extremely easy.However, in order to show that he shares the joys and sorrows with everyone and does not appear to be different, he also made himself unkempt and looked tired.

Li Huaide pulled two computers in a car and went straight to the ministry. Li Guocheng did not participate because of fatigue.

Several things happened along the way.

The first one is the chip production line. The Ministry requires the production of 5 sets, which will be built in Shanghai, BJ, Chengdu, Wuhan and Tianjin.The rolling mill must not only provide a complete set of equipment, but also provide education and contracting.

The second thing is that a complete set of drawings of the Shuguang II type was provided to the earliest 18 Arhats, which fully upgraded the existing production line. Fortunately, the rolling mill did not need to provide equipment and personnel.

The third thing is that the leaders visited the Shuguang II machine tool factory construction and focused on the dust-free workshop.He gave a high evaluation and directly instructed the Security Bureau to strengthen the security of the laboratory and increase investment in the laboratory.

There was no video of the whole process, and the newspapers only reported that the top leaders visited the steel rolling mill and gave important instructions, without any practical information.However, the internal reference was described in detail, with emphasis on the laboratory.

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