COMPUTER SYSTEMS
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Decode-execute-fetch
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execute-decode-fetch
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fetch-decode-execute
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fetch-execute-decode
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Detailed explanation-1: -The instruction cycle (also known as the fetch–decode–execute cycle, or simply the fetch-execute cycle) is the cycle that the central processing unit (CPU) follows from boot-up until the computer has shut down in order to process instructions.
Detailed explanation-2: -This process consists of three stages: fetching the instruction, decoding the instruction, and executing the instruction-these three steps are known as the machine cycle.
Detailed explanation-3: -The CPU works by following a process known as ‘fetch, decode and execute’. The CPU fetches an instruction from memory, decodes this instruction and then executes it. The CPU carries out this cycle continuously, millions of times per second.
Detailed explanation-4: -Ans : The instruction cycle consists of four phases: fetching an instruction from memory, decoding the fetched instruction, reading the address from memory, and finally, instruction execution. The computer processor carries it out.