微计算机接口技术已被用在许多工业和教育领域.现市售的硬件接口其功能很有限,且价格又十分昂贵。为此,本文介绍一种廉价的、用在 APPLE—Ⅱ微计算机上的 A/D和 D/A 接口插件板。这种插件板提供8路模拟输入通道,一路模拟输出和一个8位数字输出缓冲器。这种插件板可在实验室和数据检测与实时控制环境下应用,笔者已用此插件 Microcomputer interface technology has been used in many industrial and educational areas, and the hardware interfaces available on the market today have limited functionality and are expensive. To this end, this article presents an inexpensive A / D and D / A interface card for use with the APPLE-II microcomputer. This board provides eight analog input channels, one analog output and one 8-bit digital output buffer. This plug-in board can be used in laboratory and data detection and real-time control environment, I have used this plug-in