八路模拟数据采集显示电路，70H-77H存放采样值，78H-7BH存放显示数据，依次为个位、十位、百位、通道标志-Eight-way analog data acquisition display circuit, 70H-77H stored sampled values, 78H-7BH store display data, followed by single-digit, 10, 100, channel markers
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