- The relevant instruction/opcode is carried out on the operand.
Following the example:
- 'LOAD 10' involves Memory Locn 10, so '10' will now be stored into MAR.
- Contents of Memory Locn 10 will then be fetched (address, data bus etc) and stored into MDR. Eg the value will be '2' (so 2 was in memory locn 10)
- The content of the MDR will now be placed into Accumulator, the temporary store point.
NOTE: if we had an 'ADD' or similar operator, the ALU would have been utilised when the OPCODE identified to add / sub the value.
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