Siheyuan: Starting from a fitter

Chapter 148 KT32F100 comes out
Zhao Ting has been pregnant for more than 6 months, and her body began to have difficulty moving.Starting from 5 months old, Li Guocheng picks her up every day by bicycle.With Li Guocheng's strong body control, the car rides very steadily.Zhao Ting also gradually got used to Li Guocheng's care.

Ever since the ninjas in their childhood were wiped out, the capital has tightened foreign management, especially after increasing the frequency of patrols in Jing'er Hutong. It has been calm for more than three months.

It was another sunny summer morning. Li Guocheng was writing and drawing at his work station when Wu Liankui walked in excitedly.

"Old Li, look, these are large pine nuts, for Zhao Ting," he said, throwing a large bag of pine nuts on the workbench, weighing more than 2 kilograms.

"Oh, I just came back from Harbin. Have you ever eaten Northeastern pig meat?" Li Guocheng asked.

"It's okay if you don't mention this. Before you go, you told me how good the Northeastern butchered pig dish is, and that it is much more authentic than what you, Lao Li, make. You don't know, the master chef of Harbin Machine Tool Factory is the second master Knife, the pork belly is so good, it only tastes like sauerkraut, and the sauerkraut is a bit bitter."

Talking about this trip, Wu Liankui was afraid for a while. Not only did he not eat well, but he was almost drunk to death. "Northeast people are too powerful. Every thief can say that if they don't drink, it seems that they have made a big mistake." .

"Hahaha", Li Guocheng laughed heartily.

"No kidding, this is a task assigned by the ministry. The logistics department will send the materials shortly," Wu Liankui said, handing over a document bag.

"Okay, Lao Li, the document said this was a gift for state guests. Director Li was so happy that he gave you time to make a few more. How about making a few for my brother," Wu Liankui said with a flattering look on his face.

"Okay, as long as there are enough materials, just make a few more. I don't care how you divide them, hehe."

In front of Wu Liankui, he opened the document bag. Inside was a hand-drawn drawing, showing a domineering and mighty dragon soaring above the clouds, as if it was torn out of paper.

"So beautiful! So majestic!" Wu Liankui praised her repeatedly with eyes full of obsession.

Li Guocheng has carved many dragons, and there are some more vivid ones than this one, but not as cleverly conceived as this painting. With simple lines, it depicts the aura of the dragon soaring to the nine heavens.

Li Guocheng replayed the entire painting in his mind, slowly pondering the charm of the author's painting and the artistic conception of the idea. He slowly felt that he had captured something, but it seemed like there was nothing.

"Old Li, something is here," Wu Liankui's voice interrupted Li Guocheng's thoughts.

Li Guocheng didn't complain, how could he be able to learn the skills of a painter for decades, and he didn't have the ambition to study painting anymore.

As a master sculptor, painting composition is not his specialty, but for engraving, that is all he can do.

What the logistics delivered were fine small-leaf red sandalwood specially prepared by the ministry.Li Guocheng picked up a piece, looked at it carefully for a while, then took out his carving knife and started carving it.

Throughout the day, Li Guocheng completed a total of 6 radio casing carvings, and this task was for 50 units.As you become more proficient in graphics, your engraving speed becomes faster and faster.

Sure enough, in just one week, Li Guocheng completed the engraving of 60 radio casings.I handed it over to Yan Jiefang and asked him to help spray protective paint.

Now the rolling mill is fully producing Shuguang brand radios. The cost is only 25 yuan, the ex-factory price is 45 yuan, and the selling price is 85 yuan.

Chips are produced in three shifts in the dust-free workshop, and the assembly workshop has not yet been built. After the factory leaders discussed it, they temporarily requisitioned the auditorium, recruited young people from each workshop, and started the assembly work in three shifts.

Now Gong Wang is suffering from a headache. The five factory representatives who have obtained the indicators are guarding the machine tool laboratory of the rolling mill, waiting for the chip production line to be manufactured.

After a struggle, the representatives of the five companies determined the order of thread lifting through lottery under the supervision of Li Huaide, but they still did not leave, and the representatives of the five companies were still guarding the machine tool laboratory

They were also anxious. Seeing the booming sales of Shuguang radios, the leaders of the five factories were also anxious.

After receiving 60 spray-painted casings, Li Guocheng carefully checked that all casings were correct, and then assembled them himself. After ensuring that each radio was flawless, he handed the 60 radios to Wu Liankui. He didn't care how to distribute them.

After the short-term task was completed, Li Guocheng began the design work of DRAM memory chips again.

This time it went very smoothly and nothing happened again. In September, the design of the DRAM memory chip was completed.A set of mask templates is designed with 9 pieces in total.

Quite coincidentally, Yan Jiefang's debugging of the lithography machine has come to an end, and Li Guocheng personally participated in the final debugging.A week later, all preparations were completed.

After communicating with the dust-free workshop, everyone in the semiconductor laboratory participated in the preparation of the first real chip with excitement, and the CPU and DRAM were manufactured at the same time.

In order to obtain an accuracy of 1 micron, the wafer is photolithographed and etched multiple times, which places very high operational requirements. In order to ensure success, Li Guocheng is personally responsible for the photolithography process, and the subsequent processes of etching, doping, segmentation, packaging and The test was handed over to other people in the laboratory to complete, with Li Guocheng providing guidance.

In order to complete chip manufacturing, many tooling and fixtures are designed to meet the needs of industrial batch manufacturing.Although the chip is complex, with the help of tooling and fixtures, everyone reported that the process operations they were responsible for were simple and precise.

Everyone returned to the semiconductor laboratory, looked at the CPU and DRAM on the tray, and was very excited. They have been listening to Li Guocheng explaining computer technology recently, and they all know the importance of these two chips, and they all want to see the birth of computer technology that surpasses all current countries. .

They are both witnesses and participants. In the latest stage, although Li Guocheng was responsible for the design, other equipment and tooling were optimized or completed by themselves.

KT32F100完全仿照ARM2的系统价格设计，具有32位的数据总线、26位的寻址空间，并提供64 Mbyte的寻址范围与16个32-bit的暂存器。

One of these registers is used as a (word-sized) program counter, the first 6 bits and the last 2 bits of which are used to store processor status flags.

The KT32F100 may be the world's simplest and most practical 32-bit microprocessor, containing only 30 transistors.The reason for this simplicity is that it contains no microcode, and unlike most later CPUs, it does not contain any cache.

This streamlined feature allows it to consume very little power and perform better than Intel 80286.

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(End of this chapter)