1.1 Flashcards
What is the clock speed?
How many FDE cycles the CPU can carry out per second.
Measured in HZ.
4GHz = 4 billion instructions.
How does the no. of cores effect the CPU speed?
More cores = more instructions carried out at one time.
Only effective when applications can handle multiple cores.
What does the control bus do?
Sends signals to RAM to re-write/ bring data back.
What is the CPU?
Central processing unit has billions of switches.
Carries out commands.
Processes information.
What is the CPU?
Central processing unit has billions of switches.
Carries out commands.
Processes information.
What does the control unit do?
Controls where data goes + monitors data flow.
Sends control signals to internal components.
What does the MAR do?
Memory address register.
Stores address of current instruction to be etched from RAM.
What does the fetch part of the cycle do?
Memory address is fetched from PC to MAR.
Data at that address in RAM is copied to MDR.
What does the decode part of the cycle do?
Instruction in the MDR is decoded by the CU.
What does the ACC do?
Holds result from ALU.
What does the PC do?
Stores the address of the next instruction to be fetched.
What does the MDR do?
Stores data and instructions copied from RAM.
What does the address bus do?
Carries around addresses (can only go one way).
What does the ALU do?
Caries out the arithmetic + logic calculations in the CPU.
What is cache?
Stores commonly used instructions so it doesn’t have to go to CPU to FDE.
