CPU

Process' data

Control the movement of data and instructions

Fetches data and instructions from memory

Decode and execute instructions

Performs arithmetic operations sucha s *** and subtract and logical operations such as AND,OR,NOT,XOR

Problem solving part of the processor

This component performs arithmetic, logical and shift operations on data

Arithmetic operations: Add, Subtract, multiply and divide

Logical opertations include: AND, OR, NOT, XOR

Shift operations: move bits tot he left or right within a register

A series of on and off signals used to synchronise the operations of the processor components

Actions are usually carried out ont he rising edge of the clock

Actions each take a fix number of cycles to complete

Results form the ALU need to be stored somewhere

Several ocations of super fast memory called registers that are used to temorarily store results

Some processores have a single general purpose register called an accumulator

The CPU is connectef to the other components by wiring known as buses

Control bus: Transfers binary data from place to place

Address bus: Takes memory address. Sends and recieves signals that controls the cpu

Data bus: Carries the binaty addess of memort locations

Status register: Hold infomation about the current state of operations. It is used to set pages to detect error conditions

Program counter: Holds the memory addreds of the next instruction to be executed

Current instruction register ( CIR ): Holds the current instruction

Memory Buffer Register: Temporarily hold the data moving between the processor and main memory

Memory address register: Hold the address in memory where the processor is required to fetch or store data from or to