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纸带输入机是我国计算机的主要输入设备,虽然它是传统的外部设备,技术上已基本成熟,但还不能说它是完善的,特别在可靠性方面还存在相当大的问题。而且在我国,带卷带盘的快启停输入机还处于开始制造和使用的阶段,我所也是初次使用,这里谈谈我们的一些认识及体会,供参考。一、快启停输入机与慢启停输入机的主要区别纸带运行时,遇到出错、结束符、缓冲区满或其他原因,由同步脉冲发出停机信号,纸带在下一同步脉冲产生之前停下来,叫快启停。纸带可以停在两排孔之间(如中导孔同步时),也可以停在下排孔上(代码和后沿同步时),停止距离小于2毫米。严格地讲,停止
Paper tape input machine is the main input device of computer in our country. Although it is a traditional external device, it has basically been technically mature, but it can not be said that it is perfect. Especially, there are still some serious problems in reliability. Moreover, in our country, the fast start-stop input device with a tape reel is still in the stage of starting manufacture and use. This is the first time that I use it. Here are some of our understanding and experience for reference. First, the fast start-stop input machine and the slow start-stop input machine The main difference Tape running, encountered an error, the end of the symbol, the buffer is full or other reasons, the synchronization pulse issued by the stop signal, the tape before the next sync pulse Stop, called fast start and stop. The tape can stop between two rows of holes (for example, when the center guide is in sync) or stop on the bottom row of holes (when the code and trailing edge synchronize), stopping less than 2 mm. Strictly speaking, stop