The Stored Program Concept and Processor Components (AQA A-Level Computer Science): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Stored program concept definition
Stored program concept definition
Instructions & data stored together in same memory
Three stages of fetch-execute cycle
Three stages of fetch-execute cycle
Fetch, Decode, Execute
Control unit function
Control unit function
Oversees fetch-execute cycle & coordinates operations
ALU function
ALU function
Performs arithmetic & logic operations
Clock function in processor
Clock function in processor
Produces signal to synchronise processor components
What PC (Program Counter) stores
What PC (Program Counter) stores
Memory address of next instruction
What CIR (Current Instruction Register) holds
What CIR (Current Instruction Register) holds
Instruction currently being decoded or executed
What MAR (Memory Address Register) stores
What MAR (Memory Address Register) stores
Memory address where MBR data is written to/read from
Purpose of cache memory
Purpose of cache memory
Stores frequently accessed instructions/data for faster access
What is an interrupt?
What is an interrupt?
Signal sent to processor by program or external source