Rebirth of the 80s New Farmer

Chapter 1956 If there is a problem, it must be judged
With the price difference of 2000 yuan for Jingdongfang Display, the Huaguang computer set finally made a profit of 400 yuan.

Zhonghuaguang will be in a favorable position in the next computer sales.

Not to mention that there are still more than 2000 profits. Didn’t Huaguang sell the first three or four hundred profits?
If you are in a hurry to drop another two thousand, you will not believe that you will not be convinced by those foreign computer manufacturers.

Wan Feng has the advantage of being local, if there are bright things on the computer hardware, even if he can't beat the foreigners, he can still entangle with them for a while.

After Wang Desheng went back to organize the production of displays, Wan Feng received good news again.

The instruction set conversion of Cheng Gong's Huaguang No. [-] chip was completed.

The original architecture design of Huaguang No. 86 has already been completed, and Cheng Gong only needs to replace the instruction set written by himself with the X[-] instruction set.

After Cheng Gong spent two months replacing the instruction set, as long as the tape-out is successful, this chip can be installed in the Huaguo computer.

At the same time, Cheng Gong also brought another news. His subordinate Zhang Zhengyang had already carried out detailed calculations on the Pentium chip, and indeed found a loophole in the Pentium chip.

The loophole is indeed in the division calculus.

Pentium’s defect comes from the floating-point arithmetic unit in the chip. In a computer, all numbers must be expressed in binary, and when the Pentium chip’s floating-point arithmetic unit expresses numbers in binary, there may be some discrepancies in the calculation results in some cases. mistake.

表达式X-(X/Y)Y的结果应该是0，但当用奔腾处理器计算4195835-(4195835/3145727)×3145727时，结果不是0而是256。

The impact of the Pentium processor on the accuracy of the floating-point division instruction is related to the characteristic number of the input.That is to say, there are some dangerous numbers. If these dangerous numbers are used as divisors, the accuracy of the quotient may be reduced.

Zhang Zhengyang believes that there are at least 1738 pairs of numbers that will be wrong when doing divisor calculations, which will reduce the reliability of computers using Pentium microprocessors, and this kind of error is not the 7000 years that Weisoft said that personal computers will take It can only be encountered once, but it may appear once in more than 20 days.

As the saying goes, misfortunes never come singly, and blessings never come singly, but Wan Feng encountered triple good things in just two or three days.

Zhang Zhengyang and He Ming were the two people who followed Cheng Gong when he came out from Mi Guangnan.

These two people are usually very low-key. They have been in Huaguang for several years, and they are almost in a transparent state.

If it wasn't for Zhang Zhengyang's calculation of the Pentium chip this time, Wan Feng's Cheng Gong, who is almost in no hurry, still has such a talent.

"Mr. Zhang! Your calculation is fine, are you sure it's a problem with the Pentium chip itself?"

"Definitely! He Ming and I have done calculations several times over the past month, and we can be 100% sure that the Pentium chip is flawed."

"Thank you for your hard work."

After Zhang Zhengyang left, Wan Feng began to think.

After thinking about it for more than ten minutes, he made the following decision.

First of all, let Cheng Gong personally send the Huaguang No. [-] chip that he replaced the instruction set to Shanghai Huaguang Electronics for tape-out, and Cheng Gong will notify him immediately after tape-out.

Then he wrote a manuscript himself.

After finishing drafting the manuscript, Wan Feng called Lin Lairong and read the manuscript to Lin Lairong word by word.

Lin Lairong was a little dumbfounded after recording the manuscript: "Mr. Wan! Do you think this is true?"

"Our group's computer experts have been calculating for more than a month, and there is absolutely no problem."

"Then what shall I do?"

"Send it to the Juhua Daily, and then find a way to get this news to the media in the United States."

In the 90s, the control of the western media was not so strict. At that time, the freedom of news and speech they advertised was still the same, unlike the media decades later, which was completely stinking and shameless and talking nonsense all day long.

"Okay! I'll do it right away."

On the next day, the headline of the Hunan-Hong Kong Juhua Daily published an article about the Intel Pentium processor.

The article is as follows: As computers play an increasingly important role in life, the accuracy of computers has become one of the most basic conditions for its existence.Because once a calculation error occurs in the computer, it will cause immeasurable consequences. Recently, some experts accidentally discovered that Intel's Pentium processor will have calculation data errors when dealing with division problems. For example, when using a Pentium processor to calculate 4195835-( 4195835/3145727)×3145727, the result is not 0 but 256.

This is just one of the mistakes. After rigorous calculations, the scholar believes that at least 1738 pairs of numbers will make mistakes when doing divisor operations, which makes the reliability of computers with Pentium microprocessors untrustworthy.

In fact, this is an obvious loophole. Intel programmers will not be unaware of its existence, but what they don't understand is that there is such an obvious loophole, why does Intel push it out?And to hide it?I hope that Intel can give an explanation to the majority of computer users.

The article is more than 300 words, and the explanation is clear in a few words.

As a window where the East and the West blend, Xianggang is one of the world's three spy capitals, and any disturbance can be spread to all parts of the world.

Six hours after Juhua Daily published the news, a tabloid in the United States reprinted it, and it was quickly followed up by several major newspapers.

As a result, the news that the Intel Pentium processor has a huge problem appears overwhelmingly.

Intel hastily jumped out to claim that the news media and certain consumers had exaggerated the Pentium's flaws.This defect has no special impact on the vast majority of business application software for personal computers.Only some very individual workstation software may sometimes reduce the accuracy of division results.

They have done trillions of random division calculations, and as a result, the Pentium defect occurs only in 90 in 4 billion, and it is located in the 19th to 2.7th special digits of the calculation results.Calculation errors caused by defects in the Pentium microprocessor will only be encountered once in [-] years for ordinary users.

Only one day after this statement appeared, the Hunan-Hong Kong newspaper that broke out that there was a problem with the Pentium processor published an article again saying that it was a big panic for Intel to say that ordinary users would only encounter it once every 2.7 years. Vulnerability experts said that this cycle is not 2.7 years at all, and it is less than 27 days. The exact time is that it will appear every 20 days, and they have given conclusive evidence.

Although Intel is still trying to quibble, the market reacted quickly, and the University of Stanford issued a statement warning its customers not to buy computers with Pentium processors installed.

The university's clients include companies listed on the Fortune 500 list of America's largest companies.

At the same time, IBM also made a decision to stop selling all computers equipped with Pentium microprocessors.

The emergence of this event completely disrupted Intel's development planning and business layout.

(End of this chapter)