System Architecture 1.1.1 Flashcards
What do processors do
Process data and carry out instructions
What is a processor’s clock speed measured in?
Hertz (Hz)
What is a Hert(z)
The number of instructions carried out per second
Where in the processor are instructions executed
The core
Another word for simultaneous processing
Concurrent processing
Where is cache found
The processor
What is cache
An intermediary between the processor and the main memory.
Holds the common instructions as programmes are executed
What does the PC do
Store the address of the next instruction
What does the MAR do
store the address of the current instruction
What does the MDR do
store data fetched from the memory
What does the CIR do
temporarily holds instructions for the CU
What does the ACC (accumulator) do
holds the data being processed (result of calcs from the ALU)
What does the ALU do
completes calculations and logic for the computer
What does the CU do
Synchronises all components and decodes instructions
What is an IP address
the unique address each computer has in order to communicate
