Execution

Fetch› Decode› Execute
 
Bus CPU ALU PC IR R1 R2 Control Unit Memory 1 00000100 (4) 2 00000001 (1) :: 17 0000010010011001 18 0000010010011010 19 0000011011001000 20 0000010011010001 LOAD R1, NUM1 LOAD R2, NUM2 ADD R1, R2 STORE R1, NUM1 OS keyboard buffer Output Devices: Monitor/Printer/... Hard Disk Input Devices: Keyboard/CD/.. Address on the Bus Data or command Inside the Control Unit int num1; scanf("%d", &num1); Waiting for an instruction to decode.

System Internals
AI Karyshala

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