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本讲主要介绍微机与外部设备连接时所使用的标准接口及其规格和应用实例。一、音频盒式磁带机接口的种类及其特点采用音频盒式磁带机,把微机的程序和数据记录下来并加以保存(称外部存储)。这种方法大致和微机的普及同时推广,至今仍在应用。这时,接口的功能是将微机中“0”和“1”的信息转换成能够记录在盒式磁带上的信息(称调制),并能进行逆转换(称解调)。曾对接口方式进行了种种试验。图1表示典型方式的调制波形。
This talk mainly introduces the standard interface used by the microcomputer and external equipment, its specifications and application examples. First, the type of audio cassette tape connector and its characteristics The use of audio cassette tape drive, the computer’s programs and data recorded and saved (called external storage). This method is generally at the same time as the popularization of microcomputer and is still being applied. In this case, the function of the interface is to convert the information of “0” and “1” in the microcomputer into information that can be recorded on the tape cassette (called modulation) and to perform inverse conversion (called demodulation). Have done a variety of tests on the interface. Figure 1 shows a typical mode of modulation waveform.