一、前言单板微型机的应用近年已普遍起来,它作为学习微型计算机的工具、生产过程控制、智能仪器的部件等等,无疑具有价格低廉,使用方便等优点。但是如果要让它来进行最简单的算术运算就不那么方便了。单板微型机的学习者往往希望能够通过编程,实现算术运算,却又感到相当费事。为此,我们介绍一种用 Z80单板微型机指令编制的多字节算术运算程序, I. Introduction The application of veneer microcomputers has become widespread in recent years. It has the advantages of low cost, easy to use, etc. as a tool for learning microcomputers, production process control, components of smart instruments and the like. However, it is less convenient if it is to be used for the simplest arithmetic operations. The learners of veneer microcomputers often hope to realize the arithmetic operation through programming, but feel quite complicated however. To this end, we introduce a multi-byte arithmetic program with the Z80 single board microcomputer instructions,