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:
“By the by, who ever knew a man who never read or wrote neither who hadn’t got some small back parlour which he would call a study!”
—Charles Dickens (1812–1870)
“[Humanity] has unquestionably one really effective weapon—laughter. Power, money, persuasion, supplication, persecution—these can lift at a colossal humbug—push it a little—weaken it a little, century by century; but only laughter can blow it to rags and atoms at a blast. Against the assault of laughter nothing can stand.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“Give a boy address and accomplishments and you give him the mastery of palaces and fortunes where he goes.”
—Ralph Waldo Emerson (1803–1882)