In all PCs, the microprocessor is the chip that runs programs. The microprocessor, or central processing unit(CPU), carries out a variety of computations, numeric comparisons, and data transfers in response to programs stores in memory.
The CPU controls the computer`s basic operation by sending and receiving control signals, memory addresses, and data from one part of the computer to another along a group of interconnecting electronic pathways called a bus. Located along the bus are input and output (I/O) ports that connect the various memory and support chips to the bus. Data passes through these I/O ports while it travels to and from the CPU and the other parts of computer.
We`ll point out the similarities and differences between the different microprocessors as we describe them.