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本接口为MDR-280机而设计并完全适用于TRS-80机及PS-80机。一、设计意图上述三种微机没有专门的绘图机接口,只与打印机共用一个接口,使用时,必将拔下打印机电缆头插上绘图机电缆头。这种作法存在三个问题: 1.无法要求打印机、绘图机自动交替工作。 2.经常插拔电缆头会缩短接插件的使用寿命,甚至造成损坏。 3.工作效率低。因此,有必要给绘图机开辟单独的接口。
This interface is designed for the MDR-280 and is fully compatible with the TRS-80 and PS-80. First, the design intent The above three kinds of computer does not have a special plotter interface, only share an interface with the printer, use, will unplug the printer cable plug in the plotter cable head. There are three problems with this approach: 1. Can not ask the printer, plotter automatically alternating work. 2 often plug the cable head will shorten the life of the connector, or even cause damage. 3 low efficiency. Therefore, it is necessary to open up a separate interface to the plotter.