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

Jiang Ming placed the logic diagram marked in red on the podium, then took the indicator rod that Su Fang had left on the podium and pointed to the nine sets of counting inputs of the zero-reset register.

"This part appears in three documents. The single-page function can be interpreted as maintenance and reset. When connected across pages, it forms a complete nine-bit interrupt count chain."

He wrote the binary states on the blackboard, arranged the key nodes starting from zero, and listed the electrical conditions for the ninth bit flip and the asynchronous reset terminal on the right.

The experts in the front row quickly followed the derivation: the nine-bit register has 512 states, and once the count reaches the boundary, the next input will inevitably cause an overflow.

The Soviet design bypasses condition decoding and program protection by sending the overflow output directly to the asynchronous reset terminal of the master clock, so that it is no longer controlled by the flight program after being triggered.

"The first 511 outages were all normal, and functional acceptance, short-term aging and routine ground tests are likely to yield excellent results."

Jiang Ming moved the indicator to the feedback branch, indicating that even after the master clock was cleared, the detection state was still retained, and the recovery action would read the same trigger condition again.

"The 512th interrupt has occurred, the master clock has been reset to zero, and then repeated resets have begun. The rudder updates have stopped from this moment."

The translator's pace gradually slowed down. Vasily turned to look at the blackboard, his hand that had been resting on the drawing paper now withdrawn.

After Jiang Ming finished writing the last set of logical conditions, he immediately claimed that this was a protection mechanism under extreme failure conditions, and that it was impossible for actual flight to accumulate so many continuous interruptions.

"When the guidance computer encounters a major anomaly, it will automatically reset to prevent erroneous instructions from being transmitted to the actuator. This design has been fully verified by the Soviet side."

Vasily also pointed out that China's approach of separating the logic of maintaining order from the overall environment and extrapolating it in isolation is prone to exaggerating theoretical boundaries, and that the 512 interruptions far exceed the requirements of ordinary flight missions.

Ren Xinmin got up from the technical seat and sent the measured statistics from the Jiuquan test range to the projection table. The graph preserved the radar clutter density, attitude correction requests, and external detection frequency at different flight stages.

"These are interruption inputs under three typical wind fields and complex clutter conditions in Jiuquan. The data comes from China's own measurement system."

He first ruled out ground maintenance and manual test signals, retaining only the attitude, clock, and external detection requests that would actually be entered into the computer during live-fire flights.

After the rise phase begins, the rate of interruption accumulation continues to increase, and when entering the radar clutter-dense area, the number of requests per unit time rises rapidly.

Ren Xinmin substituted the most conservative set of data into the Soviet timing sequence, and found that the five hundred interruptions had already accumulated within two minutes of takeoff, with insufficient margin to cover the next attitude correction.

"According to your logic, the protection reset will happen mid-flight, and it will definitely happen."

The sound of slide rule being pulled could be heard from the front row of the meeting room. The Soviet-trained expert who advocated signing the memorandum lowered his head to recalculate, first checking the interruption statistics, and then recalculating the boundaries of the nine-bit register.

He initially added device delay to the model, hoping that the overflow spike would lose its trigger condition due to edge misalignment, but the minimum pulse width given by the Su side still covered the asynchronous reset threshold.

A few minutes later, he put the slide rule on the table, pulled out the summary of the memo with his approval notes, and the color drained from his face.

"Even at the most conservative frequency, it will exceed 512. If the actual noise is denser, the trigger time will be earlier."

Several old-school experts began to circulate the three volumes of drawings, piecing together the bypasses according to the page numbers marked by Jiang Ming, and the hidden feedback loop gradually became apparent.

It was broken down sufficiently: the first group was responsible for counting, the second group was responsible for status detection, and only the third group sent the overflow pulse to the master clock. It would be difficult to characterize any one group alone.

Vasily insisted that this was a theoretical deduction, claiming that the Chinese could not reproduce the electrical characteristics of the Soviet Union's official computing unit using alternative components.

Jiang Ming took out the first measured negative and put it into the slide projector.

The waveform following the 511th interrupt appeared on the screen. The main clock square wave was complete, the register output matched the nominal performance of the Suzhou factory, and the reset terminal maintained a safe level.

After the second film was replaced, the 512th pulse appeared on the left side, and the asynchronous reset terminal immediately jumped out with a spike. The master clock channel became a straight line from the next frame.

"Test voltage, pulse width, load conditions, and device response range all adopt the nominal values ​​specified in the Soviet documents."

Jiang Ming held up the double-numbered test record. The first page had the original document page number, followed by the line verification, the tester's signature, and the record of manual recovery failure.

"We also simulated the recovery process after disconnecting the external interrupt. The feedback branch retains the trigger state, and the master clock will reset to zero every time it starts up."

Once the irrefutable evidence was laid bare, the explanation of the protection mechanism lost its footing. Normal protection must allow the system to resume operation after the fault is cleared, but this loop permanently locked the system.

Ren Xinmin added that, in terms of the overall consequences, even after the guidance computer stops updating the rudder inputs, the inertial platform and telemetry power supply may still continue to operate, making it difficult for the ground to identify the root cause of the fault in a timely manner.

This design can cause live ammunition to go out of control in the air, and can also lead post-incident investigations to device failure, power supply fluctuations, or random interference.

The major general listened with a pencil in hand, then pressed the pencil shaft into his palm, breaking the shaft in the middle. The broken tip rolled to the side of the Joint Control Memorandum.

One after another, the Chinese personnel in the meeting room stood up. Some demanded that the Soviet side explain the design basis of the cross-page closed loop, while others demanded that all documents be sealed immediately and that related components be stopped from entering production preparation.

Vasily interrupted the translator in Russian, accusing the Chinese of unauthorized copying and testing of unauthorized technology, claiming that the negatives violated the management authority of the Soviet Technical Committee.

"The document is in the joint acceptance phase, and the Chinese side can only use it under the supervision of the Soviet side. Results obtained from privately constructed simulation units are invalid!"

Jiang Ming handed the test records to the military reviewers. The records showed that the source of the components, the test conditions, and the circuit connections were all signed by two people, and the original logic had not been changed in any way.

"The Chinese side did not use Soviet spare parts. The simulation unit was built using 502 stock components, and the acceptance test was conducted on the logical functions promised in the documents."

"If a set of blueprints can only prove safe under conditions that prohibit its reproduction, it is not qualified to be loaded with live ammunition."

After the translator relayed the sentence, Vasily turned and reached for the original blueprints on the podium, while the Soviet assistant began closing the file box.

Comrade Song, accompanied by two guards, stood outside the podium and showed the other party the document preservation regulations during the joint acceptance process, stipulating that all materials to be inspected could only be handed over after the meeting's conclusions were reached.

Vasily requested to contact the Soviet embassy, ​​but Comrade Song only replied that applications could be submitted through the prescribed channels, and that no one was allowed to take away the registered evidence of the investigation without authorization.

Qian Xuesen stood up, turned to the clause in the three-volume document handover letter that promised the Soviet side safety and reliability, and then looked at Vasily.

"You put the logic of being able to lock down the guidance system mid-flight into the aid documents, and then demanded that China hand over joint control."

"This practice goes beyond technical disputes and directly threatens the safety of Chinese test personnel and national defense."

Anger erupted again in the meeting room. The major general ordered the recorder to write down Qian Xuesen's characterization word for word and demanded that the Soviet representative provide a written explanation for the 512 overflow loops.

Vasily could not explain why the maintenance reset used the full count boundary, nor could he explain why the feedback branch bypassed all program protections.

As the room quieted down, Jiang Ming took out the second round of test records and bypass reconstruction diagram and projected them next to the logic diagram circled in red.

He disconnected the overflow output from the asynchronous reset terminal, added a status discrimination and narrow pulse absorption branch, while retaining the real fault reset input.

After the second waveform display count crosses 512, the master clock continues to run, and real maintenance faults can be reset and restored as required.

"The trap has been removed. China can independently complete the reconstruction of the core logic without the need for Soviet modifications, and will not accept joint control."

After saying this, Vasily's last card was also removed. The supply of materials would still cause difficulties, but it would no longer force China to hand over control of the entrance.

The major general picked up the blue memorandum, flipped to the joint control clause, tore it open along the signature line, and also tore off the supply additional conditions.

The two halves of the document lay on the table, the red seal across the seam torn apart.

"All conditions attached to the joint control are hereby nullified."