the cpu 0.0 / 5 ? ComputingComputer systemsGCSEAQA Created by: gornalljackCreated on: 04-07-17 09:40 fetch the part of the cpu where instructions are retrieved from main memory to the cpu 1 of 9 decode the stage where instructions are checked and validated 2 of 9 execute the stage where instructions are carried out 3 of 9 program counter the part of the cpu that keeps trackof the adress of the next instruction 4 of 9 instruction register the part of the cpu that holds the insruction while it is being decoded and executed 5 of 9 data bus this carries instructions from main memory to the CPU 6 of 9 memory address register this is where the program counter value is transferred while instructions are being fetched 7 of 9 memory data register this is a buffer for data passing between RAM and the CPU in either direction 8 of 9 control unit this checks wheather the instruction is valid before it is carried out 9 of 9
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