Components of A Processor

• Register - small piece of memory used for storing data within the processor
• Program Counter (PC) - a register used to hols the address of the next instruction to be executed
• Accumulator (ACC) - a general purpose register, used to hold the result of the last calculation/instruction carried out
• Memory Address Register (MAR) - used to hold the address in memory which will be accessed next
• Memory Data Register (MDR) - used to hold the data which has just been fetched from RAM
• Current Instruction Register (CIR) - where the instruction about to be run is decoded & held in the form of operator & operand
• Control Unit - Used to coordinate the actions of CPU during FDE cycle ; sends signal sown the control bus to components