After Guan Fei did the same for the back, he handed over the copper foil plate to Shu Cheng for inspection. Although his movements are fast, the tape is very sticky and will inevitably have a little residue, which requires follow-up personnel to remove it with a very thin flat file.

He used the time to check on the progress of the others.

Guan Fei came to the side of the soldier who was cutting the particleboard with a bow saw, saw that he saw very carefully, the saw edge remained outside the contour line, and nodded slightly.

Leave more leeway, and the later stage is just a little more polishing. If the saw breaks, it will be much more difficult to repair.

"Well done, better than I thought! The particles of particleboard are relatively coarse, and it is difficult to keep the saw edge flat, and there will always be some pits. After sawing, first use a file to trim it, then adjust some plaster, and after smoothing it, it will be very smooth. He complimented and pointed out the next steps.

"Yes!" Hearing his compliments, the warriors were more motivated.

Guan Fei took a look, the particle board was easy to cut, and with five or six fighters working together, the box cutting was carried out quickly. The three large parts of the left, right, and rear panels have been sawed almost one-third, and the top plate and front and lower panels are about to be sawed. The console is a bit more cumbersome, not large in size, but it also has to dig holes inside, leaving holes for joysticks and buttons, and a soldier holds the cut plank, turning it upside down, as if he doesn't know how to dig the hole.

"First use an electric drill, make a hole in the center, and if there is a gap, you can pass the saw bow through it, and then see it from the inside out. When the saw is close to the circle, just follow the line saw. He nodded.

The warrior suddenly realized, slapped his head, and laughed at himself: "Hey! Stupid! I just thought that there was no edge, the saw bow couldn't cut, and the brain was drilled. ”

"Hehe, it's okay, just do more, practice makes perfect." Guan Fei encouraged him and came to the soldier who was cutting the angle steel with a saw blade.

In the arcade frame, the picture tube and the console are relatively heavy, and the bearing capacity is still a little worse just by using a few screw holes, so an additional support frame needs to be added. Especially on the console, the player's long-term buttons, sometimes impatient and will thrash hard, without a strong bracket can not withstand it.

Originally, it was best to weld this support frame, but now there is no welding equipment at hand, so I have to temporarily drill holes and fix them with screws. The disadvantage is that the screws are easy to loosen, and after today, they still have to be removed and welded again.

Guan Fei turned around and looked at his watch, the time was just 7:13.

Judging from this progress, you don't need to stay up late to get the main frame right. There are precise drawings drawn by him, and the workload is not large, and the frame part really does not take much effort.

When he came back, Shu Cheng had already finished the copper foil board.

"Put the board in a plastic basin. Put this side down first, then put a glass rod on this end, and slowly put it down, being careful not to splash your hands. Guan Fei pointed at Shu Cheng and put the copper foil plate into the corrosion solution.

As soon as the copper foil plate is put in, the place where the solution comes into contact with the copper foil reacts violently, and the basin bubbles up as if it is boiling.

Guan Fei stared at the basin and saw that the copper foil exposed to the corrosive solution had been corroded to the point of being riddled with holes in just a moment. At a speed visible to the naked eye, the copper foil disappears into solution, revealing the resin substrate underneath.

The light signal received by the eye is transmitted to the biological side brain, and any subtle changes in the copper foil plate are monitored by him, to see that the copper foil has corroded, he immediately uses a small hook completed by iron wire, hooks the small hole drilled in advance, and takes the copper foil plate out.

Shu Cheng had already called another basin of water under his orders, Guan Fei put the board in it, and quickly washed away the remaining potion on it with a brush.

It is an early practice to use chemical solution to corrode copper circuits, and chip production is also to learn this technology, and the chemical solution will not partially corrode off the silicon wafer substrate. The advantages of this method are low cost and technical simplicity, but it also has significant disadvantages.

The potion not only corrodes downwards, but also spreads to the periphery.

Although there is a gel on the surface to protect the important parts, the potion will naturally corrode along the bottom of the gel to the side after it has corroded. The printed board is better, the circuit is relatively wide, and a little corrosion has little effect, but for the chip, the line width is very narrow, and a little more corrosion may destroy the integrity of the circuit.

In order to ensure that there was no residue of the potion, they changed the water twice before giving up.

The next thing is the main event, and Guan Fei doesn't dare to hand it over to someone else to do. It's not that he doesn't believe them, but the time is tight, and only by doing it himself, can he ensure that it will be completed without mistakes and omissions in the middle.

He took a wooden board, put the finished circuit plate on it, and pressed the board tightly with four small pieces of wood with nails. Then replace the small hand-held drill with 0. A 2 mm diameter drill bit is drilled into the center of the circle reserved for the pins of the component.

Squeak, poof!

As soon as a hole was drilled, he raised his hand and withdrew the drill bit slightly, almost sticking to the board before drilling to the next pin.

Squeak, poof!

Squeak, poof!

……

Xue Yangyuan and Shu Cheng stood aside, looking stupid. Guan Fei's hands mechanically drilled holes one by one, and the depth of each drill and the height raised when withdrawn were so consistent. Watching him punch holes, it doesn't look like a human doing it, but like a machine.

Thousands of pins, and all the holes were punched in a little more than half an hour.

The average time required per well is a few seconds!

Xue Yangyuan now believes that if Guan Fei said that he would complete the product overnight, it would be because he remembered every step and every detail of the product so clearly, and his hands were so stable, and it was completed overnight, which was by no means a big deal!

Others may not be able to, but he certainly can!

"Shu Cheng, polish it with fine sandpaper and smooth out the sharp points of the holes. Be gentle and don't wear it out. Guan Fei turned off the power, put down the electric drill, and handed the tail of the hand to Shu Cheng to do.

"Okay." Shu Cheng was also stunned, and after a pause, he quickly took the fine sandpaper, touched the sharp place with his fingers, and gently polished it.

Guan Fei went out for a spin again and gave some guidance to everyone's work, which can be regarded as a disguised time-sharing process......

All the chipboard parts have been cut, the fighters are rushing to file the edges with files, and one fighter is already mixing water and plaster. The plexiglass panels have also been cut and are also being edged. The steel frame is supported faster, and the connecting screws are almost finished.

Look at the time, it's only 7:59!

He turned around and saw that Shu Cheng was still busy and meticulous, so he poured the corrosive potion into a plastic bucket, screwed the cap, labeled it, and carefully stored it in the corner.

It took another half an hour for Shucheng to finish.

He took it, looked at the circuit diagram with a golden sheen after polishing, brushed it lightly with his hand, did not touch a sharp puncture, and smiled with satisfaction: "Very well done!" ”

Shu Cheng smiled hesitantly, and reached out to touch the back of his head embarrassedly. Although the printed board is mainly based on the brigade commander, he also has his own credit, looking at the shiny printed circuit board, he also has a huge sense of accomplishment in his heart.

It doesn't seem that difficult to make electrical appliances!

Guan Fei took the circuit board and returned to the warehouse, he had already moved the desk in the room and placed it on the wall next to the power socket as a workbench while he was free.

He first used a small spoon, mixed turpentine and alcohol, poured it on the printed board, quickly scraped it with a piece of wood, and applied a thin layer on the surface of the circuit board.

This is to apply flux to it, which is stronger when soldering and reduces the possibility of false soldering.

He sets aside the circuit board that has just been coated with flux, waits for it to solidify, and then picks out all the components to be soldered, except for the primary write-type memory, and puts them in a convenient place.

Turning around, he did the same with the back, plugging the soldering iron into the power supply and waiting for it to heat up.

Xue Yangyuan followed, quietly watching from the sidelines. Shu Cheng has the consciousness of being a subordinate, and when he sees that he has nothing to do, he takes the initiative to help other comrades, but he is full of curiosity about Guan Fei, and he feels that his rhythmic and stretching movements are a kind of enjoyment to watch.

Guan Fei calmed down, rested for a while, took the soldering iron and welding wire, twisted a resistor, and accurately inserted the pin pad hole at the marked position on the circuit. The soldering wire is attached, and the soldering iron is clicked, and the pins are firmly soldered together with the circuit.

Without distraction, he repeated the actions of raising his head, bowing his head, soldering, raising his head, bowing his head, and soldering again, soldering one component after another to the circuit board step by step.

As the minutes passed, there were more and more components on the circuit board, and fewer and fewer components to be soldered next to them.

Finally, the last component was soldered.

Wow!

A round of applause woke him from the mechanical movements, and he blinked in confusion, and when he looked over, he saw all the warriors gathered around him, clapping vigorously at him.

"Brigadier Commander, you are truly divine! Hundreds of components, I haven't seen you miss a hand! A fighter applauded and admired.

"That's right, my eyes are straight, I've never seen such a fast hand speed."

Guan Fei put down the soldering iron and scolded with a smile: "You guys, why did you form a circle around me, and everything was done?" ”

"Brigade commander, you don't look at the time, it's almost ten o'clock! We're done! Bao Yaning took a small alarm clock and hugged him.

It's really almost ten o'clock.

Before I knew it, I did it for almost two hours in a row!

Guan Fei felt sore all over his body, and his neck was as hard as a piece of wood. The biological sidebrain can control muscles and tendons, but it can't avoid the soreness caused by long-term posture fixation, and for a while, he can't even stand up, so he can only rub his legs vigorously.

"Brigadier Commander, I'll rub your shoulders for you." Bao Yaning leaned over flatteringly and rubbed his shoulders for him.

"You sycophant! It's useless to rub your shoulders. Guan Fei scolded with a smile, "If you go out later, I find that you haven't done a good job, and I will scold you." ”

"Hehe, don't be afraid, as long as you watch it, you won't scold!" Bao Yaning said with a salivating face.

"Okay, then I'll take a look!"

Guan Fei stood up and walked outside the warehouse, although he already knew something in his heart, he still lost his mind slightly when he looked at the empty arcade machine frame.

It's really done!

He stepped forward quickly, taking a closer look.

It's really done, not only the frame has been fixed with screws, the assembly is complete, the rough part of the edge is also smoothed with plaster, polished to a smooth finish, and even the handle and buttons are installed.

Although it was the first time to do it, the manual work was still relatively rough, but the soldiers did an excellent job of completing the tasks assigned to them.

"Not bad, not bad!" Guan Fei looked at the details one by one and was full of praise, "It's done quite well." I told you that the particleboard can't eat the screws, and you also remembered, use the expansion screws as the base, and then screw the screws, good, well done! ”

When the warriors heard his heartfelt compliment, they grinned and laughed happily.

Guan Fei patted his shoulders one by one to show encouragement. Looking at their happy smiles, I was filled with emotion.

They don't have much contact with the outside world, and their minds are relatively simple, and they are not polluted by substances, and they are happy enough to hear the sincere praise of their superiors. Under their own leadership, they will eventually see more, know more, and have more temptations in the future. I don't know if they will still have this kind of simple happiness in a few years, more than ten years later......

"Brigade Commander, if you finish the circuit boards, will they all be ready?" Zhou Xiaoyun also smiled, squeezed forward and asked.

Guan Fei looked at his impatient expression, smiled and shook his head: "No, there are still things that haven't been done." ”

"What's that? We'll help you do it. Bao Yaning leaned short, got through the gap, and volunteered.

"You can't help for the time being, it's making Rom, which is program memory. I'm going to solidify the program into a dedicated integrated circuit. It is like a script, the processor must calculate and process the corresponding data according to the script, and display it through the picture tube, which is the picture we see. Guan Fei gave them a rough introduction in simple terms.

"Can you do it tonight?" Shu Cheng didn't know if it was difficult or not, and asked with concern.

He is leaving tomorrow, and if he can't finish it, he will have to leave with regrets. He hopes to see the product made and put it up and running today, so that he can go back and tell the political commissar and deputy brigade commander what they have done in Hong Kong.

"No problem! You guys rest for a while, I'll be fine soon! ”

Guan Fei returned to the warehouse, and the soldiers did not turn on the TV to watch, and they all gathered around him. Even if they can't help, they want to accompany the brigade commander and complete the final work together.

Guan Fei nodded to them, took out a small cardboard box from the small cabinet next to the desk, opened it, and took out an instrument.

"It's an ePRom reader," he said by the way, since everyone didn't spread out, "Rom is an abbreviation of the English word, which means read-only memory. The product we made this time is an arcade machine, which is a large game console. Usually the arcade machines produced by various manufacturers are fixed in the game program in the read-only memory, the so-called solidification, that is, in the production of a fixed circuit of the integrated circuit, and we only do printed circuits today, soldering components is a principle, but it is smaller, so small that only a little bit of the finger ......"

Other people don't know much about it, but Shu Cheng, who has made printed circuits by himself today, understands it at once.

It's just that he still doesn't understand how he can make such a large piece of printed circuit so small and stuff it into a small piece of device the size of his finger.

What a high level of technology must be required to do this!

“…… We're going to make a game console, and we're going to have to solder a piece of ROM that solidifies the game program. But there is no manufacturer to help us produce, what should we do? Guan Fei quickly installed the ePRom, performed a boot check, checked whether the circuit was normal and whether there were any faults, confirmed that everything was in good condition, and continued, "Then it depends on things."

ROM is a thing that can't be changed once it's produced. However, it has a long production cycle, and to make a Rom, you need to make a special board for it, and the cost is too high. Sometimes people develop a program and want to test it, but they can't use Rom.

In 1956, a Chinese scientist invented PRom, which translates into Chinese as programmable read-only memory. ”

"Wow, we Chinese invented it!"

"It's amazing!"

The soldiers cried out in surprise and whispered to each other, all proud of the ingenuity of the Chinese.

Xue Yangyuan's eyes lit up when he heard it.

He also knew only a little about electronics, and he didn't know anything about these deeper knowledge, and he couldn't help but be excited to hear the news.

"Hehe, Chinese, well, also Chinese." Guan Fei knows that in this era, the concepts of overseas Chinese and overseas Chinese are still relatively vague, and he does not understand that Chinese are already foreigners who have joined other countries.

Of course, there is no need for him to correct everyone's misconceptions, and it is good to increase a little pride.

"PRom is a part of the data storage circuit that is connected by a special fuse that can be melted with electricity. Because computers are represented by power-off and power-on, when the program is input, it is only necessary to melt the fuse that indicates the power-off in order, and the program is fixed in memory.

This truth, maybe Xiao Shu understands better, just like the circuit board we make today, if you use a densely packed circuit board with holes, the holes are connected with a welding wire. When we need to make a circuit board, we only need to melt off the excess solder wire to make a circuit board that meets our requirements. ”

Xue Yangyuan and Shu Cheng suddenly realized that electronics is really a wonderful science, and they can use such a method to make integrated circuit memory that can be used in any aspect.

While explaining, Guan Fei quickly entered the program on the reader button, and there was a small LCD window next to it, displaying the program he entered.

This kind of device is still very primitive and cannot make logical judgments, so you need to concentrate, enter a command, and just stare at the program line fed back by the LCD window to see if there is a mistake. This is relatively easy for Guan Fei, and there is nothing to distract from secondary use, and the biological subbrain will find the error and give a warning prompt.

The instruction input is very fast, and after Guan Fei enters it, he knows that there is no mistake, and he doesn't check it, and directly inserts the purchased PRom for program solidification.

A piece of read-only memory containing the Space Invaders game program has been released.