The things explained by the leaders of the General Administration are important, but the long-term switch project has also reached a critical moment, and it is impossible to get out.

It is advisable to chase the poor bravely, not to sell the name of the overlord, and the difficulties that have not been conquered for a long time have made Cao Changjiu begin to be interested in the word phased results, just as a 40-year-old person will regard the word "late bloomer" as a treasure.

The hard work during this period of time also made Chang Chang feel a little tired, it turned out that opening his own company and working in the public are two different things.

The consistent concept of laziness almost prevailed, to say that the money is almost earned for a long time, and it is not a problem to live the rest of your life comfortably, and this idea has flashed in the tired and boring research and development interval for a long time.

If it is still a long time in the dream, it is estimated that it has already passed by this time, and it is okay to move overseas. It's just that reincarnated as a human being, some things have been seen for a long time, but there is an uncontrollable anger in my heart, I have seen too many people who harm others, benefit themselves, damage the public, fat, and private servants, and then compare with the silent dedication of scientific and technological personnel in this era, for a long time I suddenly feel that no matter how hard and tired it is, it is nothing, but it is not technically good, and it feels very bad to be played by the great powers as a monkey.

It's just that now it seems that even empty thinking is a luxury for a long time, and every day is taken up by solving R&D problems, and large switches are not so easy to do.

The long-term goal is more advanced, thinking about the style of his predecessors, he also has to do it in one step, and directly get out of the program control machine for the Wanmen Bureau. Those transitional products have been unsightly for a long time, and they go directly to the time-minute digital circuit.

The switch has large and small, the small one uses more air separation, the structure is simple and the maintenance is convenient, and the internal telephone of the general hotel is used in this way.

It's just that this is analog stuff, and it's not technically advanced. In order to make full use of the bandwidth and accommodate more telephone channels in a single cable, a time division system must be developed.

The time division system is simply compression, trying to accommodate more paths at the same time, and transmitting the sound signal with digital encoding, which is the orthodox approach.

It's just that there is no pure digital program-controlled switch in China, which is almost a blank, so what do they do for a long time?

However, I remembered the old director of the radar institute for a long time, and my words and deeds were clear in my mind. Blank is easy to do, everyone is not a switch anyway, almost all of them are made of computers, don't know how to learn, anyway, no matter how difficult it is, can there be an electronic computer?

As a result, the long-term team has grown by leaps and bounds, completely unaffected by traditional switch systems, and almost independently designed a system that is their own kingdom.

In fact, the program-controlled switch is a product that has grown up under the development of computer technology, and a large number of computer concepts have been introduced, so as to be efficient.

For a long time, they have been even more on the wrong side, except for peripheral transmission and call systems, almost all of them are composed of computers.

A traditional switch is almost a complete machine, and if it is a large system, it must be extremely large. For a long time, they racked their brains to avoid this situation and introduced a distributed computing system.

This kind of system sets up a main processor to control the data processing of the whole system, and drives 16~32 auxiliary processing board equipment depending on the processing capacity. The auxiliary processor is used to control the action of the digital switching system, which is equivalent to the industrial computer.

Because it is an open distribution design, the long-term development of the system can simultaneously expand the switching network, internal signaling network and data processing capacity, which can be done by increasing the processing system, which is somewhat similar to the later computer fleet system, which can meet the needs of the continuous expansion of the capacity of the call line.

This structure has a simple hardware structure, strong maintainability and scalability, even if a part of the failure, it can be replaced in real time without affecting the operation of the whole system.

The most advantageous thing is that because it is completely self-designed, they have long been imaginative, and all hardware underlying protocols and internal high-speed signaling networks comply with a standard, whether it is system management, switching network, network transmission, digital interface, analog interface at all levels, can achieve seamless access without protocol conversion. Novel software control methods can be used to expand new services simply – only by modifying the program.

It is really the so-called emancipation of the mind, omnipotent, and once they are freed from the shackles of traditional switch ideas for a long time, their research and development progress is a rapid progress.

Of course, this is understandable, a group of computer makers actually started to work on switches, what kind of scene can be made.

Adding the concept of computer network and integration to the research and development of switches, it seems that all problems are solved, and the problems that the switches do not understand will be bypassed for a long time, and they will seek breakthroughs in computer technology, which is simple and cheap.

After the success of the 800-door prototype, they originally wanted to make 2000 doors for a long time, and then encountered a bottleneck, and only introduced the concept of distributed processing system in desperation.

With this breakthrough in distribution, the prototype of Wanmen large-scale switch was quickly formed, and in October of 81, the long-term research laboratory officially began to conduct experiments.

The verification of the laboratory is very successful, and it can basically achieve the practical effect of the equivalent of 8000 doors, which makes them very proud for a long time, after all, this is a completely independent research and development of large switches in China, which is proud of its peers in China, and there must be no such thing in Japan - there are few large switches in the world that can produce all-digital large switches.

In order to hurry, they have long found the Guangdong Telephone Bureau to cooperate with various peripheral circuits, interfaces, overcurrent protection and other devices.

These are just the ends, everything is presided over by a special person, and for a long time I have been able to free up my hands to consider the tasks assigned by the leadership of the General Administration.

The census is a big deal, and it's an absolute shame to not use your own country's computer. If the country is completely incapacitated, it is fine, but buying foreign machines under the pressure of external conditions is similar to a traitor's behavior.

However, due to the limited conditions, the core components of domestic computers that are most likely to be used are foreign products, and there are many constraints on their use.

This is no longer an ordinary selection problem, a long special flight to Beijing and the leaders of the General Administration have had a deep exchange, both of them agree that this selection is related to the face of the country.

As a computer researcher, I definitely don't think that the computer I designed is inferior to foreigners for a long time, but now the practical difficulties are very complicated, even if a screw is domestic or not, it involves the views of various factions, which makes it very nerve-wracking for a long time.

As for the leadership of the General Administration, what he is concerned about is not the issue of face, he has very doubts about whether he can come up with a set of effective plans before the end of the year, and the time is too short.

"It's definitely too late to redesign, besides, change the processor? It seems that there is no 32-bit CPU in China, not even 16-bit, if you want to run such a large database, a 16-bit processor is the minimum requirement. He shook his head for a long time, but it was easy.

When the leader of the General Administration heard this, his face suddenly became a little unpleasant: "You are our only hope, you can't say no, do we really want to buy foreigners' things?"

"Not necessarily. After thinking about it for a long time, "It depends on the progress, I have a plan, but no one is going to do it." ”

"What kind of people do you want, we offer. The leader was very anxious, "As long as we can come up with a plan at the end of the year, everything is easy to say." ”

"My switch is also about to come out, and this network access permit ......" has long deliberately hung the appetite of the leader.

"Oh!" the leader of the General Administration was surprised, "Is it done? After you have done a good job, you will apply for the appraisal of the results, and I will take the lead for you." ”

"Well, I mean something like this......" Chang began to tell his own ideas.

It turned out that the idea of a group of machines had been fought for a long time, but as the computing power of computers became higher and higher, the price of supercomputers became more and more expensive, so the cluster system appeared.

It is also an application of distributed computing, where several computers are connected by a dedicated network and tasks are distributed through an operating system, providing computing power comparable to that of a large computer.

This is indeed possible, as early as when Huaxia launched its first satellite, but no one noticed that it was a unique advanced technology.

It is said that those foreign experts made a judgment after looking at the control computers after looking at the control computers: It is impossible for Huaxia to launch a successful satellite, because these computers are simply rubbish.

This assertion angered a certain powerful person in the special aerospace institute, and he didn't fight for steamed buns, but he had to make a result. On a whim, one computer is not powerful enough, so what about several together?

In this way, after day and night of painstaking meditation and hands-on restructuring, the satellite launch mission was finally successfully completed, and after practical testing, the combined performance of several computers was fully capable of a large amount of data-intensive computing.

The long-term abacus is very loud, Motorola 68000 can no longer be trusted, can only use 021 processor, more 021 processor workstation performance has been extraordinary, if the cadre workstation is then formed into a group of machines must be able to beat any visible competitors, at least in terms of performance do not need to be considered.

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Tired for a week, I slept all day today...... The weather was bad, and it was thundering, so I didn't dare to turn it on.

After considering the content of the 90 sections, I think it is still possible, the motorcycle 68000 was the world's most advanced microprocessor at that time, the manufacturing process was complex, the yield was very low, and the number would not be very large. Needless to say, at that time, even now, PS2 was not allowed to be exported to China when it was released, for fear of technology outflow.

Depending on the situation at night, there is still a chapter if there is no thunder and rain.