说明：   本例子显示一个基本的整数计算器的8051微控制器供电。虽然有一个完整的Keil C51的浮点运算库中的评估版本被限制为对象的代码2K的，所以我们必须限制此示例为整数的数学，以适应这个限额之内。 此设计方案的书面的 C 使用的Keil uVision 2个IDE为其提供了一个变形VSM的调试监视器的驱动程序。 变形配置运行环境与凯尔一起说明可以发现它的编辑在原理图上（点8051微控制器和按Ctrl - E）的，然后在编辑组件对话的形式帮助按钮点击。
(This sample displays a basic integer calculator powered by the 8051 microcontroller. Although Keil C51 has a full floating point math library the evaluation version is restricted to 2k of object code, so we have constrained this sample to integer maths in order to fit within this limit. The program for this design was written in C using the Keil uVision 2 IDE for which Proteus VSM provides a Debug Monitor driver. Instructions for configuring Proteus to run in conjunction with the Keil environment can be found by editing the 8051 microcontroller on the schematic (point at it and press CTRL-E) and then clicking on the help button on the Edit Component dialogue form. )