Systems Architecture - created from Mind Map

Page 1

Von Nuemann

Control Unit (CU)

Arithmetic Logic Unit (ALU)

Registers

Uses a single processor

Uses 1 memory for both instructions and data

Executes programs following the fetch, decode, execute cycle

Based off the stored- program computer concept, where instructions data and program data are stored in the same memory

This concept is still used today

It lets the computers logic unit, memory, as well as both input and output devices Know how to respond to instructions.

Coordinates the CPU

Works out all the calculations

Modern CPUs contain very powerful ALUs

Current Instruction Register (CIR)

Memory Address Register (MAR)

Memory Data Register (MDR)

Accumalater (ACC)

Holds the instruction the has just been fetched

Holds the address of data that needs to be accessed

Holds the data for the next instruction to be decoded

Holds all the ALU data