Machine code instructions are fetched from memory and executed by the processor - Scottish Highers Computing Science - Question 8 - 2018
Question 8
Machine code instructions are fetched from memory and executed by the processor.
Complete the missing steps of the fetch-execute cycle in the table below.
1. The pr... show full transcript
Worked Solution & Example Answer:Machine code instructions are fetched from memory and executed by the processor - Scottish Highers Computing Science - Question 8 - 2018
Step 1
2. Read line (on control bus) is activated.
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Answer
The control unit sends a signal over the control bus to inform memory that the instruction at the specified address should be read.
Step 2
3. Instruction is transferred (from memory) to the processor on the data bus.
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Answer
The instruction is fetched from memory and transferred to the processor via the data bus.
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