S0-S7为8路抢答按键输入，LD0-LD7为8路指示输出，抢答成功的路其相应的LD亮，平时为灭。接于INT0上的S8作为裁判、启动键。当按下此键后抢答才有效，否则视为违规，有效抢答响一长声，违规抢答响2短声。启动后LD按1秒速度流动闪亮30秒，每秒响一短嘀声。超过30秒未抢答作废：响四长声。有效抢答后对应的LD亮，LD停止流动。此时只有2个裁判健有效：按下ok-key为回答正确键，蜂鸣器响4声，按下cp-key为回答错误，蜂鸣器响3声。此时又回到初始状态，等待出题并按下cp-key开始抢答-S0-S7 for Answer 8 keystrokes, LD0-LD7 instructions for 8-way output, Answer successful implementation of the LD and the corresponding light, usually to eliminate. Then in the S8 as INT0 appear, start button. When pressing the Answer key to be valid, otherwise regarded as a violation, effective Answer a long ring sound, ring violation Answer 2 short sound. LD after 1 second the speed of the flow by 30 seconds flashes per second嘀sound a short ring. Answer not more than 30 seconds invalid: four long acoustic sound. Answer effective after the corresponding LD-liang, LD to stop the flow. At this point, only two appear effective Kin: ok-key by pressing the right button to answer, 4 ring buzzer sound, press the cp-key to answer the wrong buzzer sound ring 3. At this point back to the initial state, waiting for a title and press the start cp-key Answer