DESIGN AND CONSTRUCTION OF A MICROPROCESSOR - BASED , CALCULATOR

Abstract

A microprocessor-based system depends solely on the sollware in the ROM. which is connected to the microprocessor. There exist different types or ROM but the best 1'01' this kind or work is the erasable programmable Read only memory (EPROM). The EPROM could be erased and reprogrammed. The software which are programmed into the EPROM arc set or instruction which tells the microprocessor what to do. In lieu of this a microprocessor-based calculator could be upgraded in other words its function could be changed to suite your taste. Hence. a microprocessor-based caleu lator is advantageolls over its counterpart that is not soflware dependent {i.e electronic calculator bascd on hardware only}. The calculator has been designed to perform four primary functions. Addition. subtraction, mUltiplication and division or rour digit numbers. Chapter I " The introduction". This chapter gives an insight tn the origination or calculator and its technological advancement to present date. Chapter 2 "The System hardware" and sonware design contains the description or the various system hardware (components) and sonware lIsed in the design. Chapter 3 "System development" explains how the hardware was constructed and the sollwarc compiled and integrated into the system.