Read The Effective Address
Step 3 is deciding which operation it is. If this is a Memory operation - in this step the computer checks if it's a direct or indirect memory operation:
- Direct memory instruction - Nothing is being done.
- Indirect memory instruction - The effective address is being read from the memory.
If this is a I/O or Register instruction - the computer checks its kind and execute the instruction.
Read more about this topic: Instruction Cycle
Famous quotes containing the words read, effective and/or address:
“How dare I read Washington’s campaigns, when I have not answered the letters of my own correspondents? Is not that a just objection to much of our reading? It is a pusillanimous desertion of our work to gaze after our neighbours. It is peeping.”
—Ralph Waldo Emerson (1803–1882)
“The only effective way to help well-intentioned, intelligent persons to do the best they can in raising children is to encourage and guide them always to do their own thinking in their attempts at understanding and dealing with child-rearing situations and problems, and not to rely blindly on the opinions of others.”
—Bruno Bettelheim (20th century)
“Patience, to hear frivolous, impertinent, and unreasonable applications: with address enough to refuse, without offending; or, by your manner of granting, to double the obligation: dexterity enough to conceal a truth, without telling a lie: sagacity enough to read other people’s countenances: and serenity enough not to let them discover anything by yours; a seeming frankness, with a real reserve. These are the rudiments of a politician; the world must be your grammar.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)