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序言 TRS—80扩展接口(见图1)包括一个外壳,一个直流电源,一根带状电缆,一个盒式录音机的跨线和第2号盒式录音机用的附加的录音机电缆。注意,在接收时直流电源并没有安装在机壳内,它必须按照“安装”一节中所叙述的步骤安装好,如图2所示。外壳安装扩展接口的印刷电路板(PCB),二个直流电源,另外还可以容纳一个附加的扩展PCB。扩展接口使用一个实时钟,并包括另外的插口以便扩充RAM到32K(增量为16K)。一个直流电源向PCB供电。另一个电源是TRS—80的电源,这两个电源是可以互换
Introduction The TRS-80 expansion interface (see Figure 1) consists of a housing, a DC power supply, a ribbon cable, a crossover cable to the cassette recorder and an additional tape recorder cable for the cassette recorder No. 2. Note that DC power is not installed in the cabinet when it is received. It must be installed as described in the “Installation” section, as shown in Figure 2. The enclosure is equipped with a printed circuit board (PCB) with expansion interface, two DC power supplies, and an additional expansion PCB. The expansion interface uses a real-time clock and includes additional sockets to expand the RAM to 32K in increments of 16K. A DC power supply to the PCB. The other power source is the TRS-80 power supply, which are interchangeable