Before going into the details of working principle of a computer, we will analyse how computers work with the help of a
small hypothetical computer.
In this small computer, we do not consider about Input and Output unit. We will consider only CPU and memory module. Assume that somehow we have stored the program and data into main memory. We will see how CPU can perform the job depending on the program stored in main memory.
P.S. - Our assumption is that students understand common terms like program, CPU, memory etc. without knowing the exact details.
Consider the Arithmatic and Logic Unit (ALU) of Central Processing Unit :
Consider an ALU which can perform four arithmatic operations and four logical operations
To distingish between arithmatic and logical operation, we may use a signal line,