"Xiao Chen, can you introduce to us the process of this machine breaking down. Pen %Fun %Pavilion www.biquge.info"

"Oh, okay. ”

Although Xiao Chen didn't understand why such a leader would pay attention to the failure of an old machine, he still said: "Just last week, when the circuit in the computer room was being repaired, there was an unexpected power outage, which caused this DJS-130 to shut down automatically, but after that, this machine could no longer be started." We compared the repair manual of the DJS-130 and there was no similar description of the fault. It stands to reason that the DJS-130 computer is equipped with a power failure/automatic restart function, if the power grid fails, the host will have a delay time of 4.5 milliseconds before it stops working, and the power failure interrupt handler will use this delay time to store the contents of the accumulator, the program restart address, and other information that the system needs to load for the program to restart. However, after this power grid failure, we tried to restart the DJS-130, but were unsuccessful. After the incident, we inspected the computer circuits and various parts, and found no short circuits or damaged parts. Now we have submitted an after-sales application to Jiangnan Radio Factory, and the other party said that it will take half a month for after-sales technicians to come over. ”

After Xiao Chen finished speaking, he was just about to respond to the leader's questioning again, but found that everyone's eyes were focused on a young man in the crowd who did not look amazing.

The young man walked out of the crowd, came to him, and asked, "Chen Gong, when you say that the computer can't start, do you mean that the operating system can't start or the whole computer, including the fan, can't start." ”

Xiao Chen glanced at Gu Pei, saw Gu Pei nodded, and then said, "It's that the entire computer can't be started." ”

Yang Weining said: "Could it be a power failure?"

Xiao Chen shook his head and said: "Impossible, we checked the power circuit afterwards, and even replaced the power supply system with a backup power supply, but it still can't be started." ”

"Have all the storage devices been tested?"

"It's all been checked, nothing has happened, and in fact we haven't found any damage to the computer until now. ”

"Oh, I see. ”

Yang Weining thought with his chin in his club, there are many reasons for the failure of the computer to fail, but it is rare to see such a situation, and there are two reasons for this in his memory.

After a while, Yang Weining said, "Chen Gong, can you show me the technical manual of DJS-130?"

"Okay! ”

Soon, Xiao Chen found a thick DJS-130 small computer technical maintenance manual and handed it to Yang Weining.

It is said to be a technical manual, but it is actually equivalent to a small computer textbook. Yang Weining first opened the catalog page of the technical manual, found the content he wanted to see, and browsed.

As the minutes and seconds passed, the computer room was quietly pin down, and everyone's expressions were different.

As supporters of Yang Weining, Lu Yang and Chen Liangwei on the one hand expect Yang Weining to find out the fault of this machine, and on the other hand, they are worried about how to step down when the time comes.

Gu Pei's mood is even more complicated, after the machine failed, the engineers of the computing center searched for a whole week, but they could not find out the cause of the failure.

He didn't believe that Yang Weining had so much ability, but at this time, he vaguely hoped that this young man could create a miracle, after all, there was such a senior computer talent in the institute, whether it was for the 611 Institute or for himself, there was only good, no harm.

As for the others, I still hope that Yang Weining can really find out the fault of DJS-130, after all, if he can really develop a set of mature CAD software, it will be of great benefit to both public and private.

Unconsciously, more than ten minutes passed, Yang Weining was still carefully flipping through the technical manual, and there was not much expression on his face, Gu Pei finally couldn't help but say: "Xiao Yang, have you found the cause of the failure of the machine?"

Yang Weining smiled: "Director Gu, if my guess is correct, there is no fault in this DJS-130." ”

"No glitches?"

Everyone couldn't help but look at each other and was dumbfounded.

Gu Pei's face couldn't help but sink, and he said coldly: "Xiao Yang, if you make fun of the leader of the institute like this, I'm afraid it's not just a matter of not being able to borrow a small machine, don't blame the institute for directly punishing you when the time comes!"

Yang Weining closed the technical manual and said with a smile: "Director Gu, why are you in such a hurry, I haven't finished my words yet, this machine has indeed not had any failures, otherwise, I believe that you will not find nothing in the past week's testing." ”

Gu Pei said with a calm face: "Since there is no malfunction, why can't the DJS-130 start?"

Yang Weining said: "In fact, this is exactly what I want to say next, the DJS-130 is not faulty, it does not mean that this machine is free of design flaws. ”

"Design flaws?" Gu Pei shook his head and said with a dumb smile: "Xiao Yang, I think you are poor in donkey skills, DJS-130 has been mass-produced for so many years, and so many units in China are using it, if there is really a design flaw, I'm afraid it would have been discovered a long time ago, and you can still use it until today?"

Yang Weining said with a smile: "Director Gu, you may not believe my empty words, but whether there are design flaws or not, you only need to do an experiment to verify it." ”

"What experiment?"

Yang Weining said: "I need to test the relationship between the rising and falling edges of the three control signals of the power supply and the time when the power is turned on and the power is off. Chen Gong, there's no problem, right?"

Xiao Chen was stunned, at this time he couldn't see the problem between Yang Weining and Gu Pei, it was really stupid, she couldn't help but turn her gaze to Gu Pei.

Gu Pei said in a deep voice: "Do what Xiao Yang said." ”

Xiao Chen hurriedly said, "Okay!"

Xiao Chen quickly found several engineers from the computer center to remove the DJS-130 power system, and then began to test the relationship between the power control signal and time according to Yang Weining's requirements.

At this time, Lu Wenjun couldn't help but ask: "Xiao Yang, you said that the DJS-130 has design flaws, can you tell us about the specific situation." ”

Yang Weining smiled: "Okay, Lu Suo, then I'll tell you what I think." In fact, Chen Gong has already mentioned when he stated the fault just now, DJS-130 computer is equipped with power failure/automatic restart function, if the power grid fails, the host will have a delay time of 4.5 milliseconds before it stops working, and the power failure interrupt handler will use this delay time to store the content of the accumulator, the program restart address and other information that the system needs to load for the program to restart. So I specifically flipped through the DJS-130 technical manual for power failure and restart circuit, and found that there might be a small problem in it. ”