COMPUTERS

Accumulator [AC]

Accumulator [AC]

Stores the results of calculations

Instruction Register [IR]

Stores address in RAM of instruction to be processed

Memory Address Register [MAR]

Stores address in RAM of data TO BE processed

Stores the data being processed

Memory Data Register [MDR]

Program Counter [PC]

Stores address in RAM of next instruction

Arithmetic Logic Unit [ALU]

Core of the CPU, made of logic circuits to perform logic and arithmetic operations

Registers

parts of the CPU which can store data

directs operations, sends out signals to control how data moves around the CPU; it manages the clock

Control Unit