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本文指出行打印机在实时控制计算机系统中宜于采用中断工作方式,文中以采用MC6809微计算机构成的实时控制系统为例介绍了该系统所配的H14行打印机中断工作方式的工作原理和特点。其特点是行打印机的中断服务程序只是给打印机输送数据,而打印不占用主机机时,因此大大地节省了主机时间,也提高了行打印机的工作效率。文中给出了部分程序清单。本文所提供的材料对组织工业实时控制计算机系统具有一定的参考价值。
This paper points out that the line printer should adopt the interrupt working mode in the real-time control computer system. In this paper, the working principle and characteristics of the interrupt printer working in H14 line printer system are introduced by taking the real-time control system composed of MC6809 microcomputer as an example. It is characterized by line printer interrupt service routine just to the printer to send data, and print does not take up the host machine, thus greatly reducing the host time, but also improve the work efficiency of the line printer. Part of the program is given in the article list. The material provided in this paper has certain reference value to the real-time control computer system of industrial organization.