+1 Notes: Computer Application

Important Registers inside CPU

1.    Accumulator:-The accumulator is a part of the    Arithmetic Logic Unit (ALU) and is used to store data to perform arithmetic and logical operation. The result of an operation is stored in the accumulator. An accumulator is a register for short-term, intermediate storage of arithmetic and logic data. 

2.    Memory Address Register (MAR): It stores the address of a memory location to which data is either to be read or written by the processor

3.    Memory Buffer Register (MBR): It holds the data, either to be written to or read from the memory by the processor.

4.     Instruction Register (IR): The instructions to be executed by the processor are stored in the instruction register.

5.    Program Counter (PC): It holds the address of the next instruction to be executed by the processor.