After eating, Li Guocheng sat cross-legged on the bed, and the design of the motherboard began in his mind again.

One after another, this 5-fast CPU parallel computing motherboard has been designed for a week, and the difficulty has just been broken through yesterday, that is, how to communicate between 5 CPUs.

In order to give full play to the performance of the CPU, Li Guocheng overturned 2 design schemes. In the end, there was no way, a bus controller was designed, and the 5 CPUs were all point-to-point connected to the bus controller, and the bus controller was connected to a DRAM array, which could buffer the communication data of the 5 CPUs.

In order to save space, the DRAM array had to be designed separately, and in the end, the design idea of memory modules was simply adopted.

The bus controller is also connected to a hard disk to store the data to be recorded.

The bus controller can be understood as a multi-way switch, but each multi-way switch carries a data buffer.

After the scheme is determined, it is a simulation, simulating the data conflict of 5 CPUs communicating at the same time, and constantly adjusting the size of the interface buffer until it is satisfied.

The motherboard design is too simple for Li Guocheng now, because the bus frequency is not high, and the requirements for signal integrity are relatively low. However, in order to get the best speed performance, Li Guocheng still considered the bus isometric design.

Impedance matching doesn't really make much sense, because the distance between all the buses is short enough to be less than one-twentieth of the highest frequency wavelength determined by the rising edge of the signal.

In mid-September, the design of the bus controller, memory module and motherboard was completed, and the corresponding mask template was repeatedly confirmed.

In order for the lab to understand Li Guocheng's design, he wrote a detailed instruction manual and a user manual, and gave an in-depth analysis and explanation of the programming concept of parallel computing.

What exactly is the purpose of such a computer? There are many more to talk about, such as workstations, servers, multi-target tracking and control terminals, and so on.

Everything is in place, only the person who comes is owed.

Next, Li Guocheng resumed engraving in the morning, learned about the industrial situation in Hong Kong in the afternoon, and began to use the Pangu language in the evening to design circuit board development tools.

AD and Cadence were more well-known in later generations, so Li Guocheng modeled their basic functions and designed them all, considering the speed of the computer, all of them were processed with two-dimensional lines.

With a windowed display style, the design process can be done using either the command line or the mouse.

During the design process, it is found that modifying some settings can be turned into a mechanical drawing design tool. Li Guocheng directly developed a sub-window as an example program for the laboratory to learn, so that they could develop special software for mechanical drawing.

In mid-October, Li Guocheng's assets increased to 21,000 Hong Kong dollars, and his booth was well-known in Shanghai Street.

One thing that is very interesting is that on the day of the Chinese National Day, celebrations were actually seen in many places in Xiangjiang, and there were even photos of great people hanging in some places and banners.

On the day of the National Day, with Brother Hua and Brother Ji in the evening, Li Guocheng took matters into his own hands and made a roast leg of lamb for everyone, eating meat and drinking wine in a big bowl.

The two of them fell down early and were handed over to their men to take care of, and Li Guocheng returned to the rental house and had a drink with the little landlord. She has no concept of the Chinese National Day.

This made Li Guocheng a little helpless, remembering that some young people in Wanwan always thought that they were also small days before they surrendered.

Taking advantage of the strength of the wine, Li Guocheng gave the little girl a vivid history lesson.

As a reward for the little girl's serious study, Li Guocheng gave her 100 Hong Kong dollars. After all, he's a man of his word.

One day in mid-October, as soon as Li Guocheng set up his stall, he came to business, "Boss, how to sell this."

"Well, it's a Nanyue accent, not Xiangjiang local silver, but why is the voice so familiar?!"

"50 Hong Kong dollars", Li Guocheng habitually quoted, and then seemed to react and looked up.

First surprise, then ecstasy.

Zhao Jie stood in front of him with a smile, and the excited Li Guocheng stood up and stretched out his right hand, but Zhao Jie deliberately dropped his face and waved his hand again and again, and outsiders seemed to be refusing to shake hands. She whispered, "Pay attention to your identity!" ”

Li Guocheng suddenly came to his senses and cooperated to withdraw his hand.

Zhao Jie put down the 50 Hong Kong dollars rolled together, took a rabbit on the shelf and turned to leave. Li Guocheng hurriedly put the Hong Kong dollar into the secret realm.

Li Guocheng sat down calmly on the surface, but his heart was already surging, and he finally waited for the person he was waiting for.

Finally stayed up until noon, Li Guocheng cleaned up the stall, went to the stall he frequented to ask for a wonton noodle, returned to the rental room after dinner, took out the roll of 50 Hong Kong dollars, and found a note from the middle.

There is only an address and Zhao Jie's simple information written on it. Her name in Xiangjiang is Zhao Ailing, and she is a senior consultant at Golden Sun Trading Company, responsible for liaising with the northern business.

Li Guocheng changed into a suit as usual, carried a handbag, and began his daily stroll.

Following the address, Li Guocheng came to an old office building with only 6 floors. Li Guocheng came to the third floor and knocked on the door of 305. It was a young lady who opened the door.

"Which one are you looking for?"

"I made an appointment with Ms. Eileen Chao."

"You're Mr. Jackie Chan, right?"

"Yes".

"Please follow me".

Finally met Zhao Jie, sitting on the sofa, drinking the Longjing tea she had brewed. Listen to her.

"You just left, and there were a few small fights, but fortunately, they were all under control."

"The laboratory was almost dismantled, but fortunately, grandpa kept pressing."

"When the leader found out, he lost his temper, and they reined in a little."

"You'd better not meet my mom in the future."

"The family is very good, you don't have to worry".

"The laboratory began to panic, and the uncle went once, and everyone was relieved."

"The semiconductor laboratory is now nominally in charge of Wang Gong, but in fact Zhao Zhijing is presiding, Wang Gong, Zhang Tou, Wang Dayong, Zhou Xiaojuan and Yan Jiefang all support it, and others dare to blow up."

"Sister and Xiao Yu'er asked me to tell you that they miss you. This is a letter from my sister to you."

"This is 1W dollars, which is the activity fund given to you by the organization."

"No need, you've seen it, my income is not low", Li Guocheng touched his eyes and said.

Zhao Jie slowed down for a few minutes and continued to introduce.

"You really didn't dare to recognize your appearance at first, although there were agreed marks on the stall, but you didn't dare to recognize it. Slowly observe your behavior and habits, and only dare to recognize you on the third day, how did you do it, it's amazing."

"Some makeup tips. By the way, what is my identity? Li Guocheng didn't want to continue the topic of physiognomy.

"Oh, this is your passport, your identity is Malay-Chinese, you like art, and you can verify your feet."

Li Guocheng put his passport and introduction materials into his handbag, then took out a big paper bag and handed it to Zhao Jie, "This must be handed over to the laboratory!" There's a letter to your sister in it."

Zhao Jie knew what was inside the paper bag and nodded solemnly.

"You really don't want this money?"

"Thank you for me", Li Guocheng deliberately did not mention the word organization.

After speaking, he didn't dare to stay too long, and turned to leave.

Thank you all for your support!! Ask for recommendations! Ask for a commuter pass! Ask for a review!

(End of chapter)