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Apple-II型微型机是市售最廉价的8位微机系统,基本系统包括主机、显示器、打印机、软磁盘,与该机完全兼容的国产优选机种为南京紫金公司生产的紫金-II、紫金-IIA。采用Apple-II型之类微型机作实时数据采集、处理、控制,用作工艺装备单机自动化控制,在达到相同性能的条件下,其造价较用IBM-PC等机型要便宜得多,可以获得更好的性能价格比。微机实时系统必须使用A/D、D/A接口。Apple-II型微型机的A/D、D/A接口,一般是二进制8位,高精度为12位,转换速度在100μs左右,价格也颇高。在温度、流量、压力等物理量测试中,一般所需的转换速度不高,但精度要求却较高,有时选用高精度的
Apple-II-type microcomputer is the cheapest 8-bit computer system on the market, the basic system includes the host, monitor, printer, floppy disk, fully compatible with the machine made in Nanjing Zijin company preferred Zijin-II, Zijin - IIA. The use of such as Apple-II type of micro-machine for real-time data acquisition, processing, control, process equipment for stand-alone automatic control, to achieve the same performance conditions, the cost is much cheaper than with IBM-PC and other models can be, you can Get better cost performance. Computer real-time system must use A / D, D / A interface. Apple-II-type microcomputer A / D, D / A interface, usually a binary 8, high-precision 12, the conversion speed of about 100μs, the price is high. In the temperature, flow, pressure and other physical testing, the general conversion rate required is not high, but the accuracy is higher, and sometimes the choice of high-precision