I started with a ship full of max-level veterans, and I'm just a complete noob.

After Jiang Ming returned to 502 with the paper tube, he immediately instructed Fang Xudong to shut down the public testing platform, leaving only the five people who participated in the simulation in the confidential compartment.

"Build it according to the Soviet drawings. The component models can be replaced, but not a single line of logic can be changed. First, build the trap itself."

Fang Xudong unfolded the reverse drawings and divided the master clock, nine-bit counter register, and asynchronous reset branch into three areas. Zhou Chengan was responsible for logic verification, while Da Liu went to the old component cabinet to find usable transistors and relays.

Since they couldn't reuse existing computing units or risk connecting them to the final prototype, they had to piece together an analog circuit using discarded transistors, mica capacitors, and salvaged resistors from their inventory.

Da Liu brought back two wooden boxes containing transistors from an early experimental board. Although the transistors had relatively large parameter variations, they were sufficient to handle low-speed counting and interruptions.

He inserted the devices one by one into the test fixture, screened out the batch with smaller leakage current, and then used a jumper wire to connect a simple interrupt signal generator.

Jiang Ming sat down at the soldering station and connected the nine sets of flip pins of the register to be tested one by one. After soldering one pin, he asked Zhou Chengan to check it against the page number of the Su Fang.

The rosin smoke spread along the edge of the lamp, and the flying wires on the circuit board were of different colors, but their connections were strictly arranged according to the page numbers in the three documents.

After checking the last asynchronous reset line, Fang Xudong placed Su Fang's functional instructions aside and confirmed that the test voltage, pulse width, and load conditions were all within the nominal range.

"In the first round, only the original image is reproduced. The bypass module must not be connected. The counter advances every five seconds to facilitate recording the waveform at each stage."

After the power was turned on, the main clock indicator light began to flash steadily. Fang Xudong sat in front of the counter, and Da Liu pressed the interrupt generator, and the first set of pulses entered the register.

Zhou Chengan wrote down the pulse number, output level, and reset terminal status on the recording paper, changing the page every fifty pulses to avoid data congestion and difficulty in identification.

One hundred times, the nine-bit register flips sequentially, the output waveform has neat edges, and the asynchronous reset terminal is always at a safe level.

Two hundred cycles passed, and the master clock did not miss a beat. The condition detection and zeroing branch also met the anti-interference indicators in the Soviet specifications.

After the testing speed was deliberately slowed down, each relay action became exceptionally clear, and the only sounds in the laboratory were the ticking of the counter and the scratching of a pencil on paper.

Zhou Cheng'an initially kept his shoulders tense, but after recording the data up to three hundred times, he looked down to review the data from the first few pages, and his doubts gradually overcame his tension.

The Soviet architecture is indeed excellent in terms of function reuse and component saving. No abnormalities were found during 300 consecutive interrupts, and the waveform quality was even better than some of the verification circuits previously built by 502.

"Jiang, could it be that the paper simulation was too idealistic, assuming the components would flip simultaneously, and the actual delay just happens to offset the overflow pulses?"

He did not refute the calculations of the two overall experts, but simply marked the measured edge delay on the recording paper, pointing out that the response difference of several old transistors was sufficient to change the narrow pulse width.

Jiang Ming took the data and looked at it. He substituted the largest delay value into the critical window, and the result still covered the minimum trigger time of the asynchronous reset end.

"Continue testing. The more stable the results in the first 500 tests, the more substantial the evidence will be."

Zhou Chengan sat back down at the recording station, his optimism not completely gone. He preferred to believe that this was an overly complicated protection design, since deliberately planting a fault would completely change the nature of technical assistance.

After 400 interruptions were completed, Fang Xudong replaced the power regulator with a spare battery to eliminate the impact of mains power fluctuations on the final stage.

Da Liu rubbed his sore wrists and continued to send out pulses at five-second intervals. He would announce the number before each operation, and then Zhou Cheng'an would repeat it to confirm.

"Four hundred and ninety."

"Four hundred and ninety-one."

The numbers on the counter continued to advance, the master clock indicator light continued to flash as usual, and the output waveform maintained the near-perfect state described in the Soviet specifications.

By the five hundredth time, Zhou Cheng'an stopped writing and looked at Jiang Ming. He still couldn't find any direct anomalies on the record sheet that could support the conclusion on paper.

Jiang Ming took the oscilloscope probe from Fang Xudong and placed it directly on the pin of the asynchronous reset terminal, while instructing Da Liu to maintain the original rhythm.

"501."

The probe screen shows only a flat baseline, while the interrupted pulses continue to advance orderly in another channel.

508.

With the nine-bit register nearing full high level, Zhou Chengan stared at the logic indicator lights, his pencil already hovering over the record bar.

Five hundred and eleven.

The last counting state is completed, all the bit lights light up at the same time, the master clock continues to run, and the surface properties of the Soviet drawings are still flawless at this moment.

Da Liu pressed the interrupt button for the 512th time.

When the asynchronous reset pin outputs a narrow spike, the square wave on the main clock channel immediately collapses into a straight line, and the count bits that were just fully lit go out at the same time.

Fang Xudong quickly switched the trigger mode, but still could not find a new clock edge on the screen. However, the detection circuit sent out a reset pulse every fixed period.

Zhou Chengan put down his pencil, reached out and flipped the manual reset switch. The main clock had only lit up for half a cycle when the reset indicator was pressed down again.

He then disconnected the external interrupt input, but the residual state inside the register continued to cycle along the feedback branch, preventing the system from entering the complete startup procedure.

The more than 400 sets of stable data that had previously supported his judgment now turned out to be deliberate disguises left by the trap. The longer the stability period, the easier it was for the acceptance personnel to give up on continuing the test.

As Da Liu stared at the extinguished output light, his throat went dry, and he slowly removed his hand from the interrupt button.

"If this were in the air, and the servo motors weren't receiving new commands, where could the rest of the metal shell fly?"

Fang Xudong did not respond. He locked the waveforms before and after the 512th time on the screen, took two consecutive photos, and recorded the process of the failed manual recovery separately.

Jiang Ming disconnected the main power supply, checked the circuit board temperature and solder joint condition, confirmed that the fault was not due to burnt-out components, and then signed his name and the time at the end of the test record sheet.

Fang Xudong, Zhou Chengan, and Da Liu signed in turn. The page numbers of the original documents from the Soviet side were attached to the test conditions column, and the nominal voltage, pulse width, and load parameters were also copied item by item.

This record has transformed the written deduction into first-hand physical evidence. Anyone who wants to excuse themselves by claiming translation bias or theoretical misjudgment must first explain the disappearance of the master clock on the screen.

After a brief ventilation, Jiang Ming had everyone connect to the bypass compensation module he had drawn up the night before. The module consists of a first-level state discrimination gate and a narrow pulse absorption branch, with a separate input for actual maintenance and reset.

In the second round of testing, instead of slowly pushing the count every five seconds, Da Liu switched the generator to automatic mode, increasing the counting speed. Fang Xudong focused on monitoring the waveform between 510 and 520.

The front-end counter passed quickly, and everyone's attention was focused on the asynchronous reset terminal. Zhou Chengan kept the manual reset switch in the operable position.

When the 512th pulse arrives, the overflow spike enters the bypass module, the absorption capacitor completes its charging and discharging, and the discrimination gate prevents it from continuing to be sent to the master clock.

The counter returns to zero from all high levels, the main clock square wave continues to advance on the screen, and the output execution branch also completes its toggle according to the next analog instruction.

"513, that's normal."

"Five hundred and twenty, that's normal."

The system continued running even after the automatic interruption, passing through 600, 700, and 800 in sequence, without entering a repeated reset state again.

Jiang Ming instructed Da Liu to trigger a real maintenance fault input. The master clock returned to zero as required. After the fault was cleared, the system was able to recover normally, and the original protection functions were fully preserved.

Fang Xudong superimposed the two waveforms on the light box. One stopped at the 512th time, while the other continued running after passing the critical point. The only difference came from the palm-sized bypass module.

Zhou Cheng'an reviewed his previous four hundred stable records and finally understood why Jiang Ming insisted on completing the entire process.

"If only functionality and short-term stability are tested, this set of blueprints will receive the highest rating, and no one will continue to disassemble it."

Jiang Ming removed the oscilloscope probes and numbered the original circuit board, bypass module, and test records respectively, reminding everyone that only necessary evidence would be displayed at tomorrow's meeting, and the specific deactivation parameters would still be controlled by the Chinese side.

Fang Xudong cut off the exposed wires used for simulation and reproduction, put the circuit board into a sealed box, and placed the waveform film into a double-layered top-secret file bag, which was escorted by Comrade Song.

The sky outside the window had already darkened, and the clock on the wall pointed to fourteen hours before the review meeting. 502 still needed to complete the film processing, record verification, and sealing of the equipment list.

Jiang Ming placed the joint control memorandum next to the two negatives, the signature column still blank. The control that the Soviet side demanded the Chinese side hand over was now separated by only a layer of kraft paper.

Comrade Song brought in the latest meeting notice from outside the door. The Major General had raised the level of tomorrow's review meeting to the highest level, with all representatives of the Soviet technical committee in attendance.

At the end of the notification, there was a handwritten supplement stating that Vasily requested that the joint control memorandum be listed as the first signed document.