the CPU Flashcards
1
Q
what is the CPU
A
the brain of the computer system - it processes instructions
2
Q
what does the CU do?
A
control unit - controls the flow of data
3
Q
what does the ALU do?
A
arithmetic logic unit - performs calculations
4
Q
what do the registers do?
A
hold data and instructions that are about to be used by the CPU
5
Q
what does the processeing power of the CPU depend on?
A
- how any cores it has
- clock speed
6
Q
describe the fetch part of the fetch decode execute cycle
A
the controll unit moves the instruction from memory to the registers
7
Q
describe the decode part of the fetch decode execute cycle
A
the control unit decodes the instruction to find out exectly what it needs to do
8
Q
describe the execute part of the fetch, decode execute cycle
A
the instruction is carried out. E.g. a calculation is performed
