system architecture

System Architecture

• Key words:
• Von Neumann Architecture
• MAR(Memory Data register)
• MDR(Memory Data Register)
• Program Counter
• Accumulator
• ALU(Arithmetic Logic Unit)
• CU(Control Unit)
• Cache
• Fetch/Execute
• Busses

Computer Systems

• Internal components:
• The Processor
• Main memory(RAM,ROM,EEPROM)
• I/O controllers
• Buses
• External components(peripherals)
• Keyboard, mouse, printer,disk drives
• I/O devices / I/o ports
• Secondary storage

The Processor

• The 'Brains' of the computer
• Carries out instructions (Executes instructions)
• processes Data
• Retrieves Data/instructions from Main Memory (Fetch)
• stores Data into Main Memory cores Executed

Main Memory

• Ram - Random Access Memory
• Hold Data and instructions that are currently in use by the processor
• Located on the Motherboard