Siheyuan: Starting from a fitter

Chapter 149

Kaitian 101 is a special chip with no program. All logic is implemented in hardware. If you input data and formulas in the specified format, the results will be automatically displayed.

The only thing Li Guocheng can accept is that the input data and all formulas can be displayed on the monitor.

This design is much more advanced than all previous tube and transistor computers.In the past, computer input and output all relied on special paper tape.Punched paper tape, also called command tape, was the input system for early computers.

It is very troublesome to use, so as to prevent people from talking about the word count without explaining it, you can check Baidu.

The display of the Dawning 101 computer used an analog driving method at that time, and the driving circuit was relatively simple.The disadvantage is that it can only display numbers and simple symbols, too complicated content, too complicated driver code, and takes up a lot of resources.

In order to solve this problem, Li Guocheng designed it with the latest CMOS technology, designed a digital encoding driver chip BM5X100, and a display decoder chip JM5X100, and the display interface is directly defined by the VGA interface of DB15.

In order to match the VGA interface, Hou Gong and his apprentice worked on the problem for more than three months without success. Li Guocheng had to participate in the development. It is actually very simple. Hou Gong has been exposed to analog technology before and has never understood digital technology thoroughly enough. .

It only took Li Guocheng half a day to understand the crux of the matter and put forward suggestions. After the waiter modified the design according to Li Guocheng's ideas, he quickly completed the design.

Through simple DIP switch simulation input, the display can work 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 had been using it for many years and had developed habits. Changing it would be torturing himself.The so-called dead friends are not dead poor.

In fact, the biggest highlight is a Chinese character encoding and decoding chip. Due to limited resources, it only integrates 98 simplified Chinese character instructions. Only 215 Chinese characters are stored, such as address, move, jump, long jump, etc.

被李国成定义为曙光102型计算机的系统架构是：KT32F100 CPU通过16位数据总线，连接1Mbit的DRAM、显示编码芯片BM5X100和汉字编码芯片BMHZ100，键盘驱动芯片JP2X100采用I2C总线连接到CPU上面。

The 102 computer can be programmed to perform complex operations and draw simple two-dimensional graphics, but it does not have word processing capabilities. The biggest reason is the lack of memory chip space. This is also the problem that Li Guocheng needs to solve in the next step.

Of course, the Model 102 had no operating system, let alone a compiler.

There are 6 core chips, including the decoding chip in the display.So the next job is to redesign the motherboard.

The maximum speed 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 happened that Wang Dayong had research results on the double-layer circuit board, and the new motherboard directly used the double-layer board.

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

Wang Dayong can complete the next work.In less than half a day, Li Guocheng got a brand new motherboard.

Li Guocheng is no longer needed for welding. There are more than a dozen very skilled welders in the factory. We provided them with the circuit diagram and completed the welding of the three main boards in only one day.

Hearing that all the work was ready to be completed, Wu Liankui also ran over. All the staff in the semiconductor laboratory put down their work and gathered around the laboratory's test bench.

Three computers with the same appearance as the 101 computer were quietly placed on the test bench, but compared to the 101 model, the 102 model was the real computer.

Li Guocheng personally pressed the power-on button of the three computers, and the three screens successively displayed a string of Chinese characters: Welcome to the Sugon 3 computer.

Cheers suddenly echoed throughout the semiconductor laboratory.

Li Guocheng also has a lot of emotions. He has been preparing for today for three years, especially in the past year. He has been constantly conceiving, constantly overturning, and constantly simulating, and he has encountered various troubles along the way.No matter what, now the clouds finally clear and the moon shines brightly.

Although the 102 computer is simple, it is a starting point. With it, functions can be continuously added and performance improved.In any case, Li Guocheng can guarantee that in the field of digital computers, China is at the forefront of the world.

When Li Guocheng solves the two problems of operating system and compiler, the 102-type computer can be used in all walks of life, and China can enter the digital age ahead of schedule.

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

The foundation has been laid, and the next step is group operations.If Li Guocheng continues to fight alone in the future, he will soon fall behind the entire Western world that has completed its warm-up.

In the laboratory, Wang Dayong and Zhang Tou are slightly inferior, but they have very strong execution ability.Through more than a year of cooperation, other people have found that they are very smart and can completely follow Li Guocheng's ideas.

Yan Jiefang, Zhou Xiaojuan and Zhang Zhijing each have a computer and are carefully testing the entire machine based on the test cases written by Li Guocheng.

After more than 2 hours of complete machine testing, the results were fully in line with the design expectations.

Li Guocheng, who got the result, pulled the emotionally excited Lao Wu aside.

"Old Wu, I am not going to report this computer."

"Why?! How could such a good computer not report it?" Wu Liankui was so excited that he couldn't control his voice, which made everyone look at him.

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

Although they turned back and continued to understand 102, some people still kept looking back.

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

Wu Liankui arrived at his office with a dark face.

"101 units of the Shuguang 100 computer have just been produced, which can basically meet the needs of conventional computing. The biggest advantage of the 102 model now is that it can be programmed. But in essence, there is no big breakthrough.

The performance indicators of the KT32F100 chip are very excellent, but the current 102 has not really shown its strength.

Only a computer loaded with an operating system, a compiler, and a Chinese character library is a computer in the true sense.It can not only perform complex mathematical operations, but also edit text and process graphics.

I define it as the Sugon 103 computer. Such a computer can be used in all walks of life, such as machine tool automation control, weather forecasting, article writing, image processing, and even music playback.Of course, its application in military industry is even more extensive.”

"Is it really that powerful?"

"As you saw just now, you can draw pictures on the screen."

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

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(End of this chapter)