System architecture (+ Von Neuman & FDE cycle)
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Define a Core
A core is a complete processing unit within the CPU
What components does a core contain
CU - Control Unit ALU - Arithmetic Logic Unit Registers - MDR, MAR, PC, ACC, CIR
Define ALU
The decision part of the core. It performs subtraction, addition, division, multiplications, and comparisons in order to arrive at decisions
Define CU
Controls data flow and coordinates and controls all of the operations carried out by the computer and decodes instructions
How many cores can a CPU have
up to 24
Define Cache
High speed memory built into a processor to store instructions and data that the processor is likely to resuse. It is able to transfer data faster than RAM.
Define Von Neuman Architecture
Uses the stored program concept where instructions and data are loaded from main memory into the processor to be executed
Explain the FDE cycle
FDE cycle consists of 3 steps Step 1: FETCH The value in the PC is copied to the MAR. Using the address in the MAR, data is fetched from main memory and stored in the MDR. The PC is incremented Step 2: DECODE The instruction in the MDR is decoded by the control unit into an operator and operand Step 3: Execute The instruction is performed. If the instruction involves a calculation or logic operation then the ALU is responsible for this