fetch-execute cycle
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11 Terms
1
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what is step 1
fetch information from the primary storage (memory)
2
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what is step 1a
CPU → address bus → memory → data bus → memory data register
3
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what is step 2
decode information into operation code and data addresses
4
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what is step 2a
copy instruction code from memory data register into instruction register
5
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what is step 2b
copy address of the data into address register
6
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what is step 2c
use address register to copy data into storage register
7
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what is step 2d
send operation code and data to ALU
8
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what is step 3
execute the instruction on the data
9
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what is step 3a
send result to accumulator (register), ready for next instruction
10
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what is step 4
store the result in primary storage (memory)
11
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what is step 4a
result → data bus → stored in memory
Note 
Flashcards (42)