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.