Chapter 756: People who copy homework
In fact, this model they have has a name within us, DJS-60E.
At first glance, I thought this thing was an evolved version of the D type, but in fact it was not. The E does not mean it is the developmental type of the D, it just means the export version.
The export version must of course be reinforced to avoid damage during long-distance transportation.
What appeared in front of Professor Drinker's eyes at this time was a lump of black glue. I don't know what it was, but it filled a box full without any gaps.
"These oriental people actually drank vinyl! You bastards of vinyl, I hate vinyl!"
He complained loudly and breathed fragrance.
As an expert in this field, Drinker knows very well that this kind of black glue is most likely a thermosetting epoxy resin. Once cured, it will be very troublesome to remove.
It can be removed using physical methods, but this thing is very stubborn. It is easy to bring the chip with you during the removal process and cause problems.
Anything that fills the chip with vinyl is not a good thing! Drinker cursed fiercely in his heart!
It is protection in name, but in fact it is more than that. For machines or accessories that do not work in harsh environments, the protective effect of glue filling is actually overflowing.
On the contrary, there is a problem. For ordinary people, it is filled with vinyl. There is a high probability that this thing will become disposable. If there is a problem, it is very difficult to repair. Simply put, it will break as soon as it is dismantled. This hand will last for decades. The latter is not uncommon.
Not to mention ordinary people, even professionals doing maintenance would have a headache holding this thing.
"John! John! Get an angle grinder!"
At this moment, Drinker felt extremely aggrieved. When did we, the high-tech people like computers, have to use this thing?
But no matter what, this thing still works. Amidst the harsh noise, the ridges of the DJS-60E's casing were erased and the casing was completely disassembled.
All that's left is a glue block with some cables sticking out of it. The people who made the DJS-60E obviously had no intention of repairing this thing. These wires were not even connected through the interface, but were directly embedded in the glue.
Orientals are really inexperienced when it comes to computers, they are so immature! Drinker felt very contemptuous.
1274: Is there a possibility that I did it on purpose?
Under Drinker's command, the upper surface of the black rubber block was slowly worn away, and the thickness of the black rubber block was slowly becoming thinner.
It was almost done, so Drink asked John to stop. He took the angle grinder himself and began to grind it down bit by bit very carefully. It seemed that he was quite skilled in his movements.
After removing each layer, Drinker wiped it very carefully with a dry rag before going down again.
Finally, he seemed to feel something different in his hand, and his face showed joy. Then he put down the angle grinder and carefully polished it with tools such as fine sandpaper and files.
On the surface of the glue block, there are already some square-shaped things that can be vaguely seen.
Drinker worked carefully, and then...
"WTF! SOB!" He yelled in anger.
Smith quickly calmed down his emotions: "Drink, don't worry, we always have a way, don't we?"
He stretched his head and took a look at the plastic block, and almost said "SOB". The chip was indeed polished, but there was nothing on it. All the information on the chip was deliberately polished clean.
Even a non-technical person like Smith could see it because the direction of the grinding marks on the top of the chip was almost perpendicular to the direction of Drinker's grinding just now.
At this time, Drinker calmed down.
"John, you and your colleagues slowly polished these circuits. After drawing the circuit diagrams, try to disassemble and test them. I believe that most of these chips should be digital circuit chips. We can always find a way to figure it out. of their functions.”
Seeing his state, Smith was relieved. If there was a problem with his mental state, he would really lose all his money.
After half a day, Drinker had to admit that the Oriental people had done a very thorough job. They erased the logos of all the few capacitors and resistors used. They even did not use color ring resistors, but used them uniformly. A red resistor.
Although in theory this is not difficult for Drinker, it also means that at some point, he has to disassemble these components to obtain their parameters. With discrete components in the circuit and outside the circuit, the test results may be completely different.
"They can only do these little tricks, but that doesn't stop me from copying this machine. It doesn't even bother me at all, because I'm not doing these tedious things myself!" Drinker said. While complaining to Smith, he tried his best to express that he was not affected.
No matter how confident he was, the fact was that two days later, Professor Drinker broke through the defense again.
Because he discovered a problem. About 70% of the chips can indeed determine what kind of chip they are by testing the state loop and truth table. The most common ones are the four-two input NAND gate, which is very simple. It can be measured quickly. But for the remaining 30%, no matter which digital logic circuit method he uses to test, he can't get the answer. They seem to be brand new!
This made Drinker realize the seriousness of the matter. Some of them, apart from being able to determine the power supply and ground, could not even judge the relationship between their input and output. They had no clue at all.
This part of the chip was actually specially modified by Gao Zhendong on the basis of DJS-60D.
There are two reasons for the modification. One is because in the SZ61 series of chips, some of our unique chips are more beneficial to building computers, such as flip-flops, which can greatly reduce the number of chips required. Among the chips originally obtained from outside There is no such thing. Since so much effort has been spent to create the SZ61 series, how can I be worthy of the hard work of myself and my comrades if I don’t put it to good use.
The second reason is to deceive people, to put it bluntly. Because these chips are not available abroad, it will greatly delay the time for outsiders to copy the DJS-60E. This makes DJS-60E a very wonderful superposition state for outsiders. It seems promising and makes people reluctant to give up. However, some key points are very troublesome and require a lot of time.
For example, Professor Drinker's film, which has no clue at all, is a typical scam, because that thing requires inputting a pulse at the CP pin to find the input-output relationship. Of course, nothing can be seen without the pulse.
With this hope mixed with disappointment, despair mixed with hope, Professor Drinker devoted himself to the work of imitating DJS-60E. He believed that he would be able to imitate it, but he just needed some support.
"Smith, I need a few things."
"No problem, my friend, just make your request." For Smith, Drinker was able to make the request, which made him very happy. This proved that Drinker was not at a dead end, and he still had a way!
At some point, finding a way to spend money is much more difficult and important than simply saving money.
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"I need grinding and polishing equipment that can be precisely controlled, as well as a microscope with a larger magnification."
If it doesn't work, then you have to break open the chip to see the circuit.
For integrated circuits, the chip can really see the circuit, especially this kind of early integrated circuit, it is really no joke.
It's like holding a magnifying glass to a CD to copy data. In principle, there is no big problem. The data on the CD can really be read with a microscope. The only problem is that this method is very taxing on the eyes and brain.
After all, Professor Drinker was a real expert in this field. He quickly found a way, at least he was not helpless.
Similar things happened not only to Citigroup, but also to Lao Maozi.
The difference from Citigroup is that Citigroup is a private action, while Lao Maozi is a bit of a national action. At least the person responsible for similar things is their government research institution.
Comrades Vitaly and Anatoly, who had experience in imitating DJS-59, were still given the important task of imitating DJS-60 series computers.
They got the DJS-60 series computers earlier, made faster progress, and realized the seriousness of the matter earlier.
Anatoly held a mid-term test report in his hand and frowned.
"Vitaly, I think we have bad news."
"Comrade Anatole, what did you find?"
"Vitaly, most of the chips in their computers are universal. In addition to the southern comrades themselves supplying to us, even Citigroup people are also supplying to the outside world on a large scale."
"It's a good thing, you can't put your eggs in one basket. Even if it's your own basket."
"But, what I want to say is, Vitali, the remaining small part, we have tested their input-output relationship and truth table, cannot be found on the market, all of them are on public sale. You can’t find the same one in integrated circuits, this should be their own unique chip.”
This is not good news for Vitali, but he has a way.
"If the quantity is not large, we can use transistors to build circuits with similar functions. The working speed of these circuits is not high. We do not need to consider too many issues. As long as the electrical parameters of the input and output interfaces are matched well, I think they can work normally. Working.”
They are worse than Citigroup. They have no integrated circuit production capacity at all. They only have a small number of board-level circuits to replace integrated circuits, which is a barely feasible path.
Anatoly shook his head: "This will increase the complexity of the entire system and weaken the biggest advantage of this computer in terms of physical volume. But this is not the most serious thing. The most serious thing is that some of the chips We can’t get any results from our test.”
Vitali had the same idea as Drinker: "Davari, I think it's time to use a microscope."
There are ten thousand ways to cheat, but the methods for copying homework are all the same.
(End of chapter)