GCSE Computer Science
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GCSE Computer Science 18
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GCSE Computer Science 180
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Central Processing Unit (CPU) - answer-processes data and instructions by following the: 
FETCH- DECODE- EXECUTE cycle 
 
 
Control Unit (CU) - answer-¬ executes program instructions by following FDE cycle 
- controls data flow inside CPU to registers and outside CPU 
- Overall control of CPU 
 
 
Program Counter (PC) - answer-holds memory address of the instruction for each cycle 
 
 
cache - answer-¬ very fast memory but slower than registers. 
- Stores regularly used data to access quickly....
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GCSE Computer Science•GCSE Computer Science