Computer Systems (Leaving Cert Computer Science): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
ShowHide
Practise the cards
15 cards from this deck
Computer architecture
Computer architecture
Specification of how computer components should be organised
Von Neumann architecture components
Von Neumann architecture components
CPU, Memory, Bus System, I/O devices
CPU function
CPU function
Executes instructions and performs calculations
Control Unit function
Control Unit function
Fetches instructions from memory and directs CPU components
ALU function
ALU function
Performs basic arithmetic and logical operations
Program Counter stores
Program Counter stores
Memory address of next instruction to be executed
Fetch-Execute Cycle
Fetch-Execute Cycle
CPU process to retrieve, decode and execute instructions
Clock in CPU
Clock in CPU
Regulates timing and synchronisation of CPU operations
RAM characteristic
RAM characteristic
Volatile memory, faster than secondary storage
ROM characteristic
ROM characteristic
Non-volatile, retains data when power is off
Transistors function
Transistors function
Act as switches to control electric current flow (on/off)
AND gate output
AND gate output
only if both and are
OR gate output
OR gate output
if either or or both are
NOT gate output
NOT gate output
Inverse of input
Operating System role
Operating System role
Manages hardware/software resources and provides user interface