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由清华大学和武汉仪器仪表研究所联合设计的Z-80普及型微型机小键盘开发系统(见《电子技术应用》1987年第7期广告)功能比较齐全,但该系统没有考虑打印助记符程序清单及数据,用户颇觉不便。本文给出在不改变原监控程序及键盘设计的前提下,配接打印机使该系统增加打印助记符程序清单及数据功能的实现方法,并给出中断服务程序框图。该系统有D、L两个命令键,D命令可将从某地址起始的256个字节的数据送CRT显示,L命令可将从某地址起始的机器码程序反汇编并列出助记符程序清单送
Z-80 Universal Microphone Keypad Development System jointly developed by Tsinghua University and Wuhan Institute of Instrumentation (see “Application of Electronic Technology”, No.7, 1987 advertisement) has complete functions, but the system does not consider printing mnemonic Program list and data, the user quite inconvenient. In this paper, without changing the original monitoring program and keyboard design under the premise of matching printers to make the system to increase the print mnemonic program list and data functions to achieve, and gives the interrupt service block diagram. The system has D, L two command keys, D command from the address of a 256-byte data to the CRT display, L command from the address of a machine code program disassembled and listed help Note program list sent