1 - The program will be loaded into the RAM, 2 - The program counter (PC) will have the instruction of the next address in the RAM , 9 - data bus, 3 - The address is sent to the MAR through ..., 4 - address bus, 6 - address bus, 8 - The data/instruction will be copied into the MDR through the data register using ....., 10 - the instruction/data is sent to the CIR through CU using..., 5 - The CPU will Access the RAM to fetch the instruction/data using the address through the ....., 11 - data bus, 7 - The control unit will give permission to read the data, 17 - Accumulator to store the interim value , 20 - control bus to send signals. , 12 - The control Unit (CU) will start the , 15 - Instrution sets are used by a CPU to understand all the instructions that it can execute (all machine code), 16 - The instruction then either perform Arithmetic or logical operation using the ALU and uses , 13 - Decode cycle., 18 - This stage may perform fetch cycle again depend on the instruction from the CIR and the action of the instruction can be performed., 14 - The control unit will start the process by matching the instruction to an instruction set, 19 - Every component in the cycle have a conductor that will tell them what to do. CU uses ....,

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