Kaitian 101 is a dedicated chip, there is no program, all logic is implemented in hardware, input the specified format of data and formulas, and the result will be automatically displayed.

The only thing that makes Li Guocheng acceptable is that the entered data and all the formulas can be displayed on the monitor.

It's such a design, and it's much more advanced than all the previous tube and transistor computers. Previously, computers relied on special paper tape for input and output. Perforated paper tape, also known as instruction tape, was the input system of early computers.

It's very troublesome to use, so as to avoid everyone saying that the number of water words will not be explained, you can check Baidu.

The display of the Dawning 101 computer was an analog drive method at that time, and the drive circuit was relatively simple. The flaw is that it can only display numbers, simple symbols, too complex content, too complex driver coding, and takes up a lot of resources.

In order to solve this problem, Li Guocheng used the latest CMOS technology to design, designed a digital coding driver chip BM5X100, and the display decoding chip JM5X100, and the display interface is directly defined by the VGA interface of DB15.

In order to match the VGA interface, the waiter took the apprentice to tackle the problem for more than 3 months without success, Li Guocheng had to participate in the development, in fact, it is very simple, the waiter has been in contact with analog technology before, and the understanding of digital technology has not been thorough enough.

It only took Li Guocheng half a day to know the crux of the problem, put forward suggestions, and after the waiting workers modified the design according to Li Guocheng's ideas, the design was quickly completed.

With a simple DIP switch emulating input, the display can function normally, marking the success of the digital input display design.

Keyboard Li Guocheng directly copied the general-purpose keyboard of later generations, after all, he has been using it for many years, and the habit has been formed, and to change it is to torture himself. The so-called dead friends, not dead poor friends.

In fact, the biggest highlight in it is a Chinese character codec chip, because of limited resources, now only 98 simplified Chinese character instructions are integrated, and only 215 Chinese characters are stored, such as address, move, jump, long jump, etc.

The system architecture of the Dawning 102 computer, defined by Li Guocheng, is as follows: KT32F100 CPU connects 1Mbit DRAM, display coding chip BM5X100 and Chinese character coding chip BMHZ100 through a 16-bit data bus, and the keyboard driver chip JP2X100 connected to the CPU using I2C bus.

The 102 computer can be programmed to perform complex operations and draw simple two-dimensional graphics, but it has no word processing ability, and the biggest reason is the lack of space for memory chips, which is also the next problem that Li Guocheng needs to solve.

Of course, the Model 102 computer also does not have an operating system, let alone a compiler.

The core chip is 6, including the decoding chip in the display. So the next step is to redesign the motherboard.

The maximum rate of the external bus is only 4MHz, so the design of the motherboard is relatively simple, and there is no need to consider impedance matching. It just so happens that Wang Dayong has research results on double-layer circuit boards, and the new motherboard directly uses double-layer boards.

It took three days to complete the circuit design of the motherboard and two days to complete the engraving of the mask.

The next work can be completed by Wang Dayong. In less than half a day, Li Guocheng got a brand new motherboard.

Now there is no need for Li Guocheng for welding, there are more than 10 very skilled welders in the factory, and the circuit diagram is provided to them, and it only took one day to complete the welding of 3 motherboards.

Hearing that all the work had been prepared, Wu Liankui also ran over, and all the personnel in the semiconductor laboratory put down the work at hand and gathered around the test bench in the laboratory.

On the test bench are three computers that look exactly like the Model 101, but the Model 102 is the real computer compared to the Model 101.

Li Guocheng personally pressed the boot button of the three computers, and the three screens successively displayed a string of Chinese characters: Welcome to the Shuguang 102 computer.

Cheers rang out in the semiconductor lab.

Li Guocheng also has a lot of feelings, for today, he has been preparing for it for 3 years, especially in the last 1 year, he is constantly conceiving, constantly overthrowing, constantly simulating, and has encountered all kinds of troubles along the way. No matter what, now the clouds are finally open and the moon is bright.

The Model 102 computer is rudimentary, but it is a starting point with which it is possible to continuously increase features and improve performance. In any case, Li Guocheng dared to guarantee that in the field of digital computers, Huaxia has gone ahead of the world.

When Li Guocheng solves the two problems of operating system and compiler, the 102 computer can be used in all walks of life, and Huaxia can enter the digital age in advance.

Next, Li Guocheng's main energy is, of course, to design operating systems and compilers, and then to train these people in the laboratory to master the ability of chip design and application, so that many of Li Guocheng's ideas can be realized earlier.

Now that the foundation is in place, the next step is group operations. If Li Guocheng is still fighting alone, he will soon lag behind the entire Western world that has completed the warm-up.

In the laboratory, Wang Dayong and Zhang Tou are slightly worse, but they are very strong in execution. Through more than 1 year of cooperation, others found that they are all very smart and can completely follow Li Guocheng's ideas.

Yan Jiefang, Zhou Xiaojuan, and Zhang Zhijing are each on a computer, and they are seriously testing the whole machine according to the test cases written by Li Guocheng.

After more than 2 hours of testing of the whole machine, the results fully met the design expectations.

Li Guocheng, who got the result, pulled the emotional old Wu aside.

"Lao Wu, I'm not going to report this computer."

"Why?! How can such a good computer not report it? Wu Liankui excitedly did not control his voice, making everyone look sideways.

"It's okay, you continue", Wu Liankui, who realized it, hurriedly reassured everyone.

Although they turned around and continued to learn about 102, some of them kept looking back.

"Let's go, go to your office", Li Guocheng pulled Wu Liankui and left.

Wu Liankui went all the way to his office with a black face.

"The Dawning 101 computer has just been produced in 100 units, which can basically meet the needs of conventional computing. The biggest advantage of the Model 102 now is that it can be programmed. But there is not much breakthrough in essence.

The performance indicators of the KT32F100 chip are very good, and the current 102 has not really played its strength.

Only a computer loaded with an operating system, a compiler, and a Chinese character library is a computer in the true sense of the word. It is capable of not only complex mathematical operations, but also text editing, graphics processing.

I define it as the Dawning 103 computer, which can be used in all walks of life, such as machine tool automation, weather forecasting, writing articles, image processing, and even playing music. Of course, the application in the military industry is more extensive."

"Is it really that powerful?"

"You also saw it just now, you can draw pictures on the screen".

Wu Liankui thought for a while, "We can't decide this, we need to report to Director Li."

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(End of chapter)